Alcator C-Mod Run 1120604 Information

Miniproposals

Miniproposal: 675

Date Filed: 11/11/2011

Title: Initial disruption mitigation experiments with two gas jets

First Author: Geoff Olynyk

Session Leader: Geoff Olynyk (shots 1-12)

Operators
Session leader(s):	Geoff Olynyk
Physics operator(s):
Engineering operator(s):	Thomas Toland

Engineering Operator Run Comment
Gas Mitigation Tests

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments

Jun 4 2012 10:30:12:420AM 1120604001 Geoff Olynyk The gas jets were not enabled properly so didn't fire on this shot.
Also, we forgot to disable the fizzle detector and so we got a
fizzle-detector NOT PERMISSIVE signal on our interlock box.
Of course, no plasma = thought it was a fizzle.

Jun 4 2012 02:14:28:527PM 1120604001 Geoff Olynyk
Run 1120604 shot #001: Test of existing setup of gas jets. Plenum pressure 55 bar; gas mixture 15% Ar in 85% He. Pulse start times: ""B-jet"" 1.0000 s ""F-jet"" 0.9989 s Pulse lengths (duration): ""B-jet"" 1.28 ms ""F-jet"" 3.00 ms OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer ""NEW"" 2. Power supply current ""PROPELLANT"" 3. Interlock pulse out ""#F"" 4. Interlock pulse in ""#F"" 5. Pressure transducer ""OLD"" 6. Power supply current ""SHUTTER"" 7. Interlock pulse out ""#B"" 8. Interlock pulse in ""#B"" XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive

Jun 4 2012 10:38:07:383AM 1120604002 Geoff Olynyk Interlock worked successfully. B-port power supply appears to have not given a long enough pulse
to the valve and thus B-port valve didn't open. F-port valve opened successfully.

Jun 4 2012 02:14:36:170PM 1120604002 Geoff Olynyk
Run 1120604 shot #002: Repeat shot 1. Test of existing setup of gas jets. Plenum pressure 55 bar; gas mixture 15% Ar in 85% He. Pulse start times: ""B-jet"" 1.0000 s ""F-jet"" 0.9989 s Pulse lengths (duration): ""B-jet"" 1.28 ms ""F-jet"" 3.00 ms OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer ""NEW"" 2. Power supply current ""PROPELLANT"" 3. Interlock pulse out ""#F"" 4. Interlock pulse in ""#F"" 5. Pressure transducer ""OLD"" 6. Power supply current ""SHUTTER"" 7. Interlock pulse out ""#B"" 8. Interlock pulse in ""#B"" XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive

Jun 4 2012 10:51:37:270AM 1120604003 Geoff Olynyk Run 1120604 shot #003

Description:
Increase B-jet pulse duration to 2.00 ms.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times:
B-jet 1.0000 s
F-jet 0.9989 s

Pulse lengths (duration):
B-jet 2.00 ms
F-jet 3.00 ms

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by SHUTTER power supply
NEW jet (F-port) driven by PROPELLANT power supply

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#F'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive (fizzle detector)

Jun 4 2012 11:01:57:777AM 1120604003 Geoff Olynyk B-jet again didn't fire. Power supply is getting pulse in properly from interlock box, but current is not coming out.

One difference from before (run 1120202) is that the pulse in to the power supply is now 4.4 V (instead of 5.0 V). The interlock box seems to make the voltage droop a bit (passive elements in interlock box?)

Jun 4 2012 11:16:42:250AM 1120604004 Geoff Olynyk B-port gas jet did not fire. Same problem as before - TTL input to SHUTTER power supply looks good, but output is just a little peak, less than 2 V and lasting about 0.65 ms.

Jun 4 2012 02:14:48:620PM 1120604004 Geoff Olynyk Run 1120604 shot #004

Description:
B-jet pulse duration back to 1.28 ms. Restarted fast valve power supply (both modules: SHUTTER and PROPELLANT) and reseated B-jet high-current cable at both ends. Last attempt to get SHUTTER power supply working, otherwise we'll continue our tests with just the PROPELLANT power supply.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times:
B-jet 1.0000 s
F-jet 0.9989 s

Pulse lengths (duration):
B-jet 1.28 ms
F-jet 3.00 ms

Power supply and valve configuration:

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by SHUTTER power supply
NEW jet (F-port) driven by PROPELLANT power supply

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#B'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 11:38:59:060AM 1120604005 Geoff Olynyk So it's definitely the SHUTTER power supply that is faulty. The B-jet was driven by the PROPELLANT power supply for this shot and it opened. F-jet was driven by the SHUTTER power supply and did not open.

Next: swap physical valve hardware.

Jun 4 2012 02:14:57:203PM 1120604005 Geoff Olynyk Run 1120604 shot #005

Description:
Switch drivers, see what happens.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 1.0000 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply)

Pulse lengths (duration) (RSview names):
B-jet 1.28 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT) power supply)

Power supply and valve configuration:

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!)
NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!)

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#B'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 12:44:07:060PM 1120604006 Geoff Olynyk Torus pressure went to 377 mtorr on this shot.

Scopes are all messed up... every single one of the 32 inputs on the TRAQ_4 (all four T2812 8-channel cards) goes from 0 to 5 V for 1.28 ms beginning at t = 1.000 s. So we do not know which gas jet(s) fired or for how long.

Granetz is power-cycling the CAMAC crate (12:42 pm).

Jun 4 2012 02:15:05:347PM 1120604006 Geoff Olynyk Run 1120604 shot #006

Description:
We have disconnected the interlock box so that the SHUTTER power supply is now driven directly by the 5 V trigger pulse (not the 4.4 V output from the interlock box).

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 1.0000 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply)

Pulse lengths (duration) (RSview names):
B-jet 1.28 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT) power supply)

Power supply and valve configuration:

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!)
NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!)

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#B'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 12:57:15:553PM 1120604007 Geoff Olynyk Signals went to the interlock box, but nothing came out. Gas jets did not fire (torus pressure did not rise).

Jun 4 2012 02:15:16:813PM 1120604007 Geoff Olynyk Run 1120604 shot #007

Description:
We have disconnected the interlock box so that the SHUTTER power supply is now driven directly by the 5 V trigger pulse (not the 4.4 V output from the interlock box). (Repeat of shot #6 - hopefully no digitizer problems this time)

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 1.0000 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply)

Pulse lengths (duration) (RSview names):
B-jet 1.28 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT) power supply)

Power supply and valve configuration:

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!)
NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!)

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#B'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 02:12:40:587PM 1120604008 Geoff Olynyk Was basically identical to shot 5. Tom Toland et al. are now changing the gas valve hardware...

Jun 4 2012 02:15:24:317PM 1120604008 Geoff Olynyk Run 1120604 shot #008

Description:
Repeat of shots 6 and 7

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 1.0000 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply)

Pulse lengths (duration) (RSview names):
B-jet 1.28 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT) power supply)

Power supply and valve configuration:

OLD jet on B-port
NEW jet on F-port

OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!)
NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!)

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer 'NEW'
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F'
4. Interlock pulse in '#F'
5. Pressure transducer 'OLD'
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B'
8. Interlock pulse in '#B'

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 02:15:34:493PM 1120604009 Geoff Olynyk Run 1120604 shot #009

Description:
We have moved the NEW valve over to B-port. The OLD valve is sitting on the table. There is no fast valve installed at F-port.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 1.0000 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply)

Pulse lengths (duration) (RSview names):
B-jet 1.28 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT) power supply)

Power supply and valve configuration:

OLD valve not installed
NEW valve on B-port

NEW valve (B-port) driven by PROPELLANT power supply
OLD valve is not installed. SHUTTER power supply is not driving anything (but appears to be broken anyway).

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer at F-port, disconnected
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F' - goes to PROPELLANT power supply
4. Interlock pulse in '#F' - goes to PROPELLANT power supply
5. Pressure transducer 'NEW' (at B-port)
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B' - goes to SHUTTER power supply
8. Interlock pulse in '#B' - goes to SHUTTER power supply

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 02:36:19:073PM 1120604010 Geoff Olynyk Run 1120604 shot #010

Description:
Swap outputs of power supplies back to what they were originally. For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 0.9989 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve)

Pulse lengths (duration) (RSview names):
B-jet 3.00 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve)

Power supply and valve configuration:

OLD valve not installed
NEW valve on B-port

NEW valve (B-port) driven by SHUTTER power supply
OLD valve is not installed. PROPELLANT power supply is not driving anything.

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer at F-port (currently disconnected)
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F' - goes to PROPELLANT power supply
4. Interlock pulse in '#F' - goes to PROPELLANT power supply
5. Pressure transducer at B-port (currently 'NEW' valve/transducer)
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B' - goes to SHUTTER power supply
8. Interlock pulse in '#B' - goes to SHUTTER power supply

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 02:43:31:243PM 1120604011 Geoff Olynyk Run 1120604 shot #011

Description:
Same as shot 10 except we try to bypass the interlock box again. Last time we tried this (shot 06) the digitizer went crazy... hoping that was a coincidence and it doesn't have to do with us trying to bypass the interlock box.

For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 0.9989 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve)

Pulse lengths (duration) (RSview names):
B-jet 3.00 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve)

Power supply and valve configuration:

OLD valve not installed
NEW valve on B-port

NEW valve (B-port) driven by SHUTTER power supply
OLD valve is not installed. PROPELLANT power supply is not driving anything.

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer at F-port (currently disconnected)
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F' - goes to PROPELLANT power supply
4. Interlock pulse in '#F' - goes to PROPELLANT power supply
5. Pressure transducer at B-port (currently 'NEW' valve/transducer)
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B' - goes to SHUTTER power supply
8. Interlock pulse in '#B' - goes to SHUTTER power supply

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 02:58:55:353PM 1120604011 Geoff Olynyk NEW jet at B-port still didn't fire using SHUTTER power supply, even with interlock box bypassed. So the SHUTTER power supply really does appear to be broken in some way.

Jun 4 2012 03:03:46:183PM 1120604012 Geoff Olynyk Run 1120604 shot #012

Description:
Same as shots 10-11, but bypassing the interlock box in a different way.

For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently.

Plenum pressure 55 bar; gas mixture 15% Ar / 85% He.

Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details):
B-jet 0.9989 s (to SHUTTER power supply)
F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve)

Pulse lengths (duration) (RSview names):
B-jet 3.00 ms (connected to SHUTTER power supply)
F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve)

Power supply and valve configuration:

OLD valve not installed
NEW valve on B-port

NEW valve (B-port) driven by SHUTTER power supply
OLD valve is not installed. PROPELLANT power supply is not driving anything.

Digitization setup:

XTOMO TRAQ_4 T2812 #04:
1. Pressure transducer at F-port (currently disconnected)
2. Power supply current 'PROPELLANT'
3. Interlock pulse out '#F' - goes to PROPELLANT power supply
4. Interlock pulse in '#F' - goes to PROPELLANT power supply
5. Pressure transducer at B-port (currently 'NEW' valve/transducer)
6. Power supply current 'SHUTTER'
7. Interlock pulse out '#B' - goes to SHUTTER power supply
8. Interlock pulse in '#B' - goes to SHUTTER power supply

XTOMO TRAQ_4 T2812 #03:
1-7. Not used
8. TORVAC permissive

Jun 4 2012 03:11:46:110PM 1120604012 Geoff Olynyk Still didn't work. That's all folks.

Conclusions and lessons learned:

1. The SHUTTER power supply (which normally drives the valve at B-port) is borked. Have to get this fixed ASAP.

2. Using the PROPELLANT power supply to drive each of the two valves individually (the NEW valve on F-port on shot 4; and the OLD valve on B-port on shot 5) shows that it is not the power supplies that are causing the difference, but rather hardware differences in the valve/pressure transducer assembly.

3. Moving the NEW valve from F-port to B-port (see shot 9), driven by the PROPELLANT power supply, causes the NEW valve to act exactly like it did when it was at F-port. So it is not obstructions in the pipe that are causing the difference.

4. We have to figure out what information is usable from the run back in February (1120202) given the hardware differences between the two gas injectors.

Physics Operator Comments

Jun 4 2012 09:51:08:950AM Robert Granetz
Setting up to do gas jet tests. Plenum fill pressure is 55 bar of a mixture of 15% Ar / 85% He

Engineering Operator Comments

Shot Time Type Status Comment

1 10:22:55:823AM Test Bad No Gas

2 10:32:01:773AM Test Ok

3 10:53:52:210AM Test Ok

4 11:11:23:607AM Test Ok

5 11:29:42:570AM Test Ok

6 12:24:26:137PM Test Ok

7 12:49:24:940PM Test Ok

8 12:57:35:210PM Test Ok

9 02:20:17:900PM Test Ok

10 02:38:43:677PM Test Ok

11 02:55:14:650PM Test Ok

12 03:03:05:017PM Test Ok

System Availability

Jun 4 2012 10:22:32:950AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD no secured - tagged out Jun 2 2008 11:03:58:433AM (sears) Joe Snipes Active MHD Antenna golfit
BES yes BES system is online Nov 22 2011 02:21:12:050PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes Midplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibrated Apr 20 2012 09:57:29:520AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization no Bottle has been disconnected from gas lines and plugged. It is being stored in the diborane cabinet. Feb 29 2012 07:47:39:617AM (dekow) Jim Irby Boronization dekow,irby
CECE no Jan 6 2012 03:48:47:060PM Anne White Correlation ECE whitea
CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01:59:693PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor no Off line. Helium dewar to be installed Monday 5/14/12 May 10 2012 08:45:54:900AM (labombard) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard
CXRS yes core-CXRS system is online Nov 22 2011 02:21:22:280PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan
CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44:46:247AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch
D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 1 2009 09:45:41:090AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 5 2011 02:41:42:867PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar
Disruption Mitigation yes two gas jet valves active as of Feb 2012 May 15 2012 10:09:23:597AM (granetz) Robert Granetz Gas Jet granetz,whyte
Divertor IR no Mar 6 2007 10:50:41:677AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 6 2007 10:51:39:897AM Glen Wurden Divertor IR Spectroscopy gwurden,terry
DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 1 2012 01:24:23:953PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte
DNB yes "The beam could break at any moment." May 15 2012 10:09:52:470AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung
ECDC yes Apr 26 2012 03:23:19:057PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes FRC-ECE is online May 14 2012 11:53:01:693AM (bespam) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea
FTCI yes System Operational May 14 2012 11:50:45:590AM (irby) Jim Irby Fast two-color interferometer irby
G-Side Ratiomatic yes Installed April 25,2012 May 1 2012 05:03:39:313PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no HV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged. Mar 5 2012 10:21:53:460AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby
GPC yes Operational Apr 27 2012 07:41:46:907AM (hubbard) Amanda Hubbard ECE Polychromater hubbard
GPC2 yes Operational Apr 27 2012 07:42:03:317AM (hubbard) Amanda Hubbard ECE Polychromater hubbard
GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 1 2009 09:45:50:933AM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes system is functional and taking data Dec 5 2011 02:42:29:857PM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Apr 26 2012 03:23:49:607PM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36:33:420PM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 6 2011 08:21:02:453AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly
HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05:24:810PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt
ICRF D-Antenna yes May 31 2012 09:20:06:827AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes May 31 2012 09:19:57:640AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes May 31 2012 09:19:47:443AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin
Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46:02:193AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller
Laser Blow-Off yes Pumped Down, Laser has not yet been tested but otherwise operational May 14 2012 04:31:17:037PM (nthoward) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid no LH is now safe for manned entry into machine. Positioner locked and tagged off. Switches locked in dummy load position. Mar 2 2012 02:34:28:943PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer no off Apr 15 2011 08:24:27:930AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
LoWEUS yes LoWEUS viewing the 10-30 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:34:077AM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke
LPI no Beam line removed May 30 2008 02:09:12:833PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane Lyman-a. New B-PORT Lyman (BPLY) still being debugged. Apr 20 2012 10:44:00:540AM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke
Magnetics yes Dec 1 2011 11:51:51:970AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe
McPherson no McPherson viewing the 10-14 nm region for molybdenum monitoring. It's days are numbered as LoWEUS has demonstrated superiority. Apr 20 2012 10:44:10:937AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry
Michelson yes Vacuum 3-4e-8 T. Starting with Michelson at reduced speed. Apr 27 2012 07:42:41:960AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Dec 2 2011 12:27:47:163PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland
MLP yes Operational. Connected to A-port probe system May 10 2012 08:40:19:910AM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE yes 2/29/2012 MSE operational. No HV or vacuum safety issues Feb 29 2012 12:26:13:863PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for He3 detectors on J port. Remaining voltages will be turned on for the first run. Apr 23 2012 09:31:22:063AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05:24:380PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby
NINJA yes C-bottom and new F-bottom system ready. Dec 2 2011 12:28:44:843PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland
PCI yes Operational. May 1 2012 08:31:33:743AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab
Penning Gauges yes HV power supplies turned ON in INIT, off in RECOOL May 10 2012 08:41:03:000AM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 1 2009 09:46:29:543AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter yes 3 chords operational but with high noise level Jan 6 2012 04:22:20:903PM (irby) Jim Irby C-Mod Polarimeter irby
Power - Alternator Air Switch yes Apr 26 2012 03:24:21:607PM (dekow) Gary Dekow Alternator to Power Room Power Supply Connection cochran,dekow,dterry,irby
Power - PEI yes Apr 26 2012 03:24:41:250PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Apr 26 2012 03:24:57:153PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Apr 26 2012 03:25:14:497PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Operational. Some dead probes. May 10 2012 08:41:58:120AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational. 4 out of 6 probes working. May 10 2012 08:41:40:557AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational. May 10 2012 08:42:13:733AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard
Probe Array - UDIV yes Operational. Some dead probes. May 10 2012 08:42:32:663AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes As of 1120508, the 60, 75, 88s, 112, 140 and variable are connected and turned on. May 8 2012 10:33:21:567AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational. A variety of probe heads are ready for use. May 10 2012 08:43:10:937AM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Operational. May 10 2012 08:43:24:887AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP no Not functioning. Probe tips are melted. Repair not performed during break. May 10 2012 08:44:43:137AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Shoelace Antenna yes Operational May 10 2012 08:45:08:320AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard
SOL reflectometer yes c-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each discharge May 1 2012 04:54:58:820PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin
Sparker yes Sparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AM Apr 23 2012 12:06:10:983PM (parkin) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
Surface Science Station no SSS is up to air, no safety issues. Feb 27 2012 01:51:48:783PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov
TCI yes TCI lasers in operation May 14 2012 11:51:18:700AM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:32:050PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma
TS - Edge yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:51:363PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58:35:493AM (agraf) Alex Graf Visible Spectrometer agraf
XEUS yes XEUS viewing the 1-6 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:43:107AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke
XTOMO yes ARRAY1->5 available. Specific channels on various arrays display issues. Apr 20 2012 05:36:28:523PM (faustian) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke

Session Leader Comments
Jun 4 2012 10:30:12:420AM	1120604001	Geoff Olynyk	The gas jets were not enabled properly so didn't fire on this shot. Also, we forgot to disable the fizzle detector and so we got a fizzle-detector NOT PERMISSIVE signal on our interlock box. Of course, no plasma = thought it was a fizzle.
Jun 4 2012 02:14:28:527PM	1120604001	Geoff Olynyk	Run 1120604 shot #001: Test of existing setup of gas jets. Plenum pressure 55 bar; gas mixture 15% Ar in 85% He. Pulse start times: ""B-jet"" 1.0000 s ""F-jet"" 0.9989 s Pulse lengths (duration): ""B-jet"" 1.28 ms ""F-jet"" 3.00 ms OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer ""NEW"" 2. Power supply current ""PROPELLANT"" 3. Interlock pulse out ""#F"" 4. Interlock pulse in ""#F"" 5. Pressure transducer ""OLD"" 6. Power supply current ""SHUTTER"" 7. Interlock pulse out ""#B"" 8. Interlock pulse in ""#B"" XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 10:38:07:383AM	1120604002	Geoff Olynyk	Interlock worked successfully. B-port power supply appears to have not given a long enough pulse to the valve and thus B-port valve didn't open. F-port valve opened successfully.
Jun 4 2012 02:14:36:170PM	1120604002	Geoff Olynyk	Run 1120604 shot #002: Repeat shot 1. Test of existing setup of gas jets. Plenum pressure 55 bar; gas mixture 15% Ar in 85% He. Pulse start times: ""B-jet"" 1.0000 s ""F-jet"" 0.9989 s Pulse lengths (duration): ""B-jet"" 1.28 ms ""F-jet"" 3.00 ms OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer ""NEW"" 2. Power supply current ""PROPELLANT"" 3. Interlock pulse out ""#F"" 4. Interlock pulse in ""#F"" 5. Pressure transducer ""OLD"" 6. Power supply current ""SHUTTER"" 7. Interlock pulse out ""#B"" 8. Interlock pulse in ""#B"" XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 10:51:37:270AM	1120604003	Geoff Olynyk	Run 1120604 shot #003 Description: Increase B-jet pulse duration to 2.00 ms. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times: B-jet 1.0000 s F-jet 0.9989 s Pulse lengths (duration): B-jet 2.00 ms F-jet 3.00 ms OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#F' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive (fizzle detector)
Jun 4 2012 11:01:57:777AM	1120604003	Geoff Olynyk	B-jet again didn't fire. Power supply is getting pulse in properly from interlock box, but current is not coming out. One difference from before (run 1120202) is that the pulse in to the power supply is now 4.4 V (instead of 5.0 V). The interlock box seems to make the voltage droop a bit (passive elements in interlock box?)
Jun 4 2012 11:16:42:250AM	1120604004	Geoff Olynyk	B-port gas jet did not fire. Same problem as before - TTL input to SHUTTER power supply looks good, but output is just a little peak, less than 2 V and lasting about 0.65 ms.
Jun 4 2012 02:14:48:620PM	1120604004	Geoff Olynyk	Run 1120604 shot #004 Description: B-jet pulse duration back to 1.28 ms. Restarted fast valve power supply (both modules: SHUTTER and PROPELLANT) and reseated B-jet high-current cable at both ends. Last attempt to get SHUTTER power supply working, otherwise we'll continue our tests with just the PROPELLANT power supply. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times: B-jet 1.0000 s F-jet 0.9989 s Pulse lengths (duration): B-jet 1.28 ms F-jet 3.00 ms Power supply and valve configuration: OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by SHUTTER power supply NEW jet (F-port) driven by PROPELLANT power supply Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#B' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 11:38:59:060AM	1120604005	Geoff Olynyk	So it's definitely the SHUTTER power supply that is faulty. The B-jet was driven by the PROPELLANT power supply for this shot and it opened. F-jet was driven by the SHUTTER power supply and did not open. Next: swap physical valve hardware.
Jun 4 2012 02:14:57:203PM	1120604005	Geoff Olynyk	Run 1120604 shot #005 Description: Switch drivers, see what happens. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 1.0000 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): B-jet 1.28 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT) power supply) Power supply and valve configuration: OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!) NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!) Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#B' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 12:44:07:060PM	1120604006	Geoff Olynyk	Torus pressure went to 377 mtorr on this shot. Scopes are all messed up... every single one of the 32 inputs on the TRAQ_4 (all four T2812 8-channel cards) goes from 0 to 5 V for 1.28 ms beginning at t = 1.000 s. So we do not know which gas jet(s) fired or for how long. Granetz is power-cycling the CAMAC crate (12:42 pm).
Jun 4 2012 02:15:05:347PM	1120604006	Geoff Olynyk	Run 1120604 shot #006 Description: We have disconnected the interlock box so that the SHUTTER power supply is now driven directly by the 5 V trigger pulse (not the 4.4 V output from the interlock box). Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 1.0000 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): B-jet 1.28 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT) power supply) Power supply and valve configuration: OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!) NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!) Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#B' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 12:57:15:553PM	1120604007	Geoff Olynyk	Signals went to the interlock box, but nothing came out. Gas jets did not fire (torus pressure did not rise).
Jun 4 2012 02:15:16:813PM	1120604007	Geoff Olynyk	Run 1120604 shot #007 Description: We have disconnected the interlock box so that the SHUTTER power supply is now driven directly by the 5 V trigger pulse (not the 4.4 V output from the interlock box). (Repeat of shot #6 - hopefully no digitizer problems this time) Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 1.0000 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): B-jet 1.28 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT) power supply) Power supply and valve configuration: OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!) NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!) Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#B' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 02:12:40:587PM	1120604008	Geoff Olynyk	Was basically identical to shot 5. Tom Toland et al. are now changing the gas valve hardware...
Jun 4 2012 02:15:24:317PM	1120604008	Geoff Olynyk	Run 1120604 shot #008 Description: Repeat of shots 6 and 7 Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 1.0000 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): B-jet 1.28 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT) power supply) Power supply and valve configuration: OLD jet on B-port NEW jet on F-port OLD jet (B-port) driven by PROPELLANT power supply (reverse of normal!!) NEW jet (F-port) driven by SHUTTER power supply (reverse of normal!!) Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer 'NEW' 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' 4. Interlock pulse in '#F' 5. Pressure transducer 'OLD' 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' 8. Interlock pulse in '#B' XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 02:15:34:493PM	1120604009	Geoff Olynyk	Run 1120604 shot #009 Description: We have moved the NEW valve over to B-port. The OLD valve is sitting on the table. There is no fast valve installed at F-port. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 1.0000 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply) Pulse lengths (duration) (RSview names): B-jet 1.28 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT) power supply) Power supply and valve configuration: OLD valve not installed NEW valve on B-port NEW valve (B-port) driven by PROPELLANT power supply OLD valve is not installed. SHUTTER power supply is not driving anything (but appears to be broken anyway). Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port, disconnected 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer 'NEW' (at B-port) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 02:36:19:073PM	1120604010	Geoff Olynyk	Run 1120604 shot #010 Description: Swap outputs of power supplies back to what they were originally. For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 0.9989 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve) Pulse lengths (duration) (RSview names): B-jet 3.00 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve) Power supply and valve configuration: OLD valve not installed NEW valve on B-port NEW valve (B-port) driven by SHUTTER power supply OLD valve is not installed. PROPELLANT power supply is not driving anything. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently disconnected) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'NEW' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 02:43:31:243PM	1120604011	Geoff Olynyk	Run 1120604 shot #011 Description: Same as shot 10 except we try to bypass the interlock box again. Last time we tried this (shot 06) the digitizer went crazy... hoping that was a coincidence and it doesn't have to do with us trying to bypass the interlock box. For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 0.9989 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve) Pulse lengths (duration) (RSview names): B-jet 3.00 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve) Power supply and valve configuration: OLD valve not installed NEW valve on B-port NEW valve (B-port) driven by SHUTTER power supply OLD valve is not installed. PROPELLANT power supply is not driving anything. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently disconnected) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'NEW' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 02:58:55:353PM	1120604011	Geoff Olynyk	NEW jet at B-port still didn't fire using SHUTTER power supply, even with interlock box bypassed. So the SHUTTER power supply really does appear to be broken in some way.
Jun 4 2012 03:03:46:183PM	1120604012	Geoff Olynyk	Run 1120604 shot #012 Description: Same as shots 10-11, but bypassing the interlock box in a different way. For this shot, SHUTTER power supply drives NEW valve at B-port. PROPELLANT power supply would drive valve at F-port, except that there is no valve at F-port currently. Plenum pressure 55 bar; gas mixture 15% Ar / 85% He. Pulse start times (note these are the settings in the RSview control system; they do not necessarily correspond to which valve is actually receiving current, because we're swapping things; see below for more details): B-jet 0.9989 s (to SHUTTER power supply) F-jet 0.9989 s (to PROPELLANT power supply - not driving any valve) Pulse lengths (duration) (RSview names): B-jet 3.00 ms (connected to SHUTTER power supply) F-jet 3.00 ms (connected to PROPELLANT power supply - not driving any valve) Power supply and valve configuration: OLD valve not installed NEW valve on B-port NEW valve (B-port) driven by SHUTTER power supply OLD valve is not installed. PROPELLANT power supply is not driving anything. Digitization setup: XTOMO TRAQ_4 T2812 #04: 1. Pressure transducer at F-port (currently disconnected) 2. Power supply current 'PROPELLANT' 3. Interlock pulse out '#F' - goes to PROPELLANT power supply 4. Interlock pulse in '#F' - goes to PROPELLANT power supply 5. Pressure transducer at B-port (currently 'NEW' valve/transducer) 6. Power supply current 'SHUTTER' 7. Interlock pulse out '#B' - goes to SHUTTER power supply 8. Interlock pulse in '#B' - goes to SHUTTER power supply XTOMO TRAQ_4 T2812 #03: 1-7. Not used 8. TORVAC permissive
Jun 4 2012 03:11:46:110PM	1120604012	Geoff Olynyk	Still didn't work. That's all folks. Conclusions and lessons learned: 1. The SHUTTER power supply (which normally drives the valve at B-port) is borked. Have to get this fixed ASAP. 2. Using the PROPELLANT power supply to drive each of the two valves individually (the NEW valve on F-port on shot 4; and the OLD valve on B-port on shot 5) shows that it is not the power supplies that are causing the difference, but rather hardware differences in the valve/pressure transducer assembly. 3. Moving the NEW valve from F-port to B-port (see shot 9), driven by the PROPELLANT power supply, causes the NEW valve to act exactly like it did when it was at F-port. So it is not obstructions in the pipe that are causing the difference. 4. We have to figure out what information is usable from the run back in February (1120202) given the hardware differences between the two gas injectors.

Physics Operator Comments
Jun 4 2012 09:51:08:950AM		Robert Granetz	Setting up to do gas jet tests. Plenum fill pressure is 55 bar of a mixture of 15% Ar / 85% He

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:22:55:823AM	Test	Bad	No Gas
2	10:32:01:773AM	Test	Ok
3	10:53:52:210AM	Test	Ok
4	11:11:23:607AM	Test	Ok
5	11:29:42:570AM	Test	Ok
6	12:24:26:137PM	Test	Ok
7	12:49:24:940PM	Test	Ok
8	12:57:35:210PM	Test	Ok
9	02:20:17:900PM	Test	Ok
10	02:38:43:677PM	Test	Ok
11	02:55:14:650PM	Test	Ok
12	03:03:05:017PM	Test	Ok