Alcator C-Mod Run 1070627 Information

Miniproposals

Miniproposal: 480

Date Filed: 4/27/2007

Title: WASP Experiments: Topology Effect on SOL Total Flow Vector

First Author: Noah Smick

Session Leader: Noah Smick (shots 1-32)

Operators
Session leader(s):	Noah Smick
Physics operator(s):	Robert Granetz
Engineering operator(s):	Andy Pfeiffer,Sam Pierson,Gary Dekow

Engineering Operator Run Comment
MP#480: WASP Experiments: Topology effect on SOL Total Flow Vector Sessi

Session Leader Plans

Entered: Jun 26 2007 03:04:11:517PM

Author: Noah Smick

MP 480, run #2:
Last time we successfully scanned density and topology through the desired phase space collecting flow and fluctuation data on all probes. However, we were cautious with the plunge depths and occasionally did not reach the steep gradient region with one or more probes. Today, our first goal will be to revisit the most interesting configurations and be sure to get a shot with all probes scanning sufficiently deep before moving on. We will attempt to keep plasma conditions as steady as possible during the shot to increase the chances of having good data from all three probes on at least one scan. This means there should be no ramp in density, SSEP or the gaps during the shot. We will be focusing on low deinsites where the flow dynamics are the most interesting. We will also iclude an SSEP scan at intermediate density to look at flow and gradient behaviour in the secondary separatrix region. If time permits we will go to a low power (Ip=0.6 mA) shot and attempt to scan the probes as deep as possible. We will reduce the TF correspondingly to keep the edge q constant (Bt=4.0 T). These shots will be at an "intermediate" density of NL04=0.6, with an n/nG similar to NL04=0.8 at Ip=0.8 mA.

Equilibrium Configuration: LSN, USN and DN, using reference shots: 1070511015, 1070511019, 1070614012

Auxiliary Systems:
Neutral Beam
NINJA, 10psi D2 after probe scans
Dust injection allowed after probe scans

Diagnostics:
Scanning Probes (WASP, ASP, FSP) Flush-mount Probes, HIREX & HIREX Sr., CXRS

Shot Sequence:

Begin with:
Toroidal Field: 5.4 T
Plasma Current 0.8 MA

Shots#1-3
NL04=0.5e20, LSN
Call up shot 1070511015 and adjust:
SSEP ramp must be removed.

Shots#4-6
NL04=0.5e20, USN
Call up shot 1070511019 and adjust:
Tweak F-probe target (gap should remain constant)
Try to remove bump in Inner gap at ~1.2s
Move upper x-point out ~4.3 cm (should match R position of LSN x-point).

Shot #7
NL04=0.6e20, USN

Shot #8
Repeat, Fluctuation Mode

Shot #9
NL04=0.6e20, LSN

Shot #10
Repeat, Fluctuation Mode

Shot #11
NL04=0.8e20, LSN

Shot #12
NL04=0.8e20, USN

Shots #13-15
Call up shot 1070614012 and adjust:
Remove SSEP jog and stabilize all gaps
Decrease Inner gap to make suitable for WASP (10-12mm)
Outer Gap should be ~15mm
Attempt to maintain a well-balanced double null
NL04=0.8e20

Shot #16
LSN near DN: SSEP=-5mm

Shot #17
LSN near DN: SSEP=-2mm

Shot #18
USN near DN: SSEP=2mm

Shot #19
USN near DN: SSEP=5mm

Shot #20
NL04=1.0e20, USN

Shot #21
NL04=1.0e20, LSN

Change Tokamak configuration to:
Toroidal Field: 4.0 T
Plasma Current 0.6 MA

Shots #22-23
NL04=0.6e20, LSN
Attempt to scan probes deep. May require further reducing inner gap

Shot #24
Repeat in USN

Physics Operators Plans

Entered: Jun 26 2007 02:39:58:093PM

Author: Robert Granetz

Engineering setup for Wednesday 27 June 2007 MP#480: WASP Experiments: Topology effect on SOL Total Flow Vector Session leaders: N. Smick Physics operator: R. Granetz ECDC overnight in D2, pressure=2e-4 Torr. Rmin/Rdwell/Rmax = 44/45/103 cm. Bake at 60 C. Power systems as on 1070511015. A-coil configuration: normal [Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi D2 Enabled Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, DNB, Z-bolo shutters Torvac setup: Gate valves open after the shot Specific diagnostics: scanning probes (WASP, ASP, FSP), flush mount probes, HIREX & HIREX-Sr, CXRS NINJA D2 puffs will be done for inboard CXRS. Dust puffing is allowed after the probes have scanned. ------------------------------------------------------------------------------- ICRF Setup: No ICRF for this run LH Setup: No LH for this run DNB: yes, primarily for CXRS velocity measurements Cryopump: No cryopump for this run ------------------------------------------------------------------------------- Run plan: Lower single null, upper single null, and double null plasmas will be run during the day, mostly with density, SSEP, and gaps held constant during each shot. For additional details, see the session leader's run plan.

Session Leader Summaries

Entered: Jun 29 2007 02:36:22:013PM

Author: Noah Smick

Day 2 of MP 480 was carried out today. We had a productive run with only 2 fizzles, although one was caused by some power supply problems and created a significant delay. We accomplished the density scan in USN and LSN getting good flow data for NL04~0.5,0.6,0.8 and 1.0e20m-2. We also got fluctuation data for both topologies at NL04~0.6e20m-2.

The SSEP scan was difficult to implement because each change in SSEP changed the gaps and made it difficult to target the probes. We focused on USN near-double nulls because we previously got some points in LSN near-double null on 5/11. We got good data at SSEP~2mm and SSEP~5mm. We also attempted to get data at SSEP~-5mm and in balanced double null but were forced to move on before we were completely satisfied with the results.

We did not get the opportunity to take the proposed shots at low power (0.6MA and 4.0T).

Our flow measurements supplemented by a number of other diagnostics, including Charge exchange from the DNB and NINJA puffs, as well as X-ray spectroscopy. Dust injection and lithium pellet injection were allowed late in the shots.

Physics Operator Summaries

Entered: Jun 27 2007 04:52:59:960PM

Author: Robert Granetz

Run summary for Wednesday 27 June 2007 MP#480: WASP Experiments: Topology effect on SOL Total Flow Vector Session leaders: N. Smick Physics operator: R. Granetz The machine ran very reliably today in lower null, upper null, and double null configurations. Most of the physop work today, in addition to the topology changes, involved careful adjustments of inboard and outboard gaps, SSEP, and density. Today's operation was ohmic only. There were only two fizzles, one of which was due to the DNB running out of LHe in one pump just an hour before the end of the day, which raised the pre-fill pressure when its gate valve opened. The other (shot 1070627016) was due to a curious, subtle problem with OH2L. It started putting out about a kiloamp right when it turned on at t=-1.1 s, and the extra 1 kA stayed on the output through t=0, resulting in a bad Br0. This problem was apparently caused by an incorrect voltage signal involved in the internal feedback of the OH2L supply. The problem went away on the next shot, without us having done anything, and did not come back today. Scorecard: 30 plasmas 0 duds 2 fizzles 0 power supply tests 0 no-power MDS shot cycles -------------- Total: 32 shot cycles

Session Leader Comments

Jun 27 2007 10:28:15:433AM 1070627001 Noah Smick Good density control, but unintentional SSEP ramp persists late in shot. WASP did not fire. Other probes scanning at 0.7,0.9,1.1s. No puffs this shot.

Next: reduce left gap by 2mm, scan probes deeper. NINJA will be puffing

Jun 27 2007 10:27:49:293AM 1070627002 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Targeting is good. WASP 0-1mm beyond separatrix. SSEP scan is present because the necessary change was not implemented. Should be fixed now.

Next: Repeat for one more targeting tweak. WASP to scan 1mm deeper

Jun 27 2007 10:27:24:137AM 1070627003 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 1mm beyond separatrix. SSEP scan is gone, A probe held back to see what the gaps did with the SSEP change. Will need one more shot at this configuration

Next: Repeat. WASP to scan 1mm deeper

Jun 27 2007 10:26:41:400AM 1070627005 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
WASP 2mm beyond separatrix. Perfect. Te to 70 eV and agreeing on all electrodes

Next: Increase density to NL04=0.6e20

Jun 27 2007 10:26:13:853AM 1070627006 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix.
Density ~< 0.7e20, good
F probe not deep enough

Next: Repeat, F probe needs to go deeper.

Jun 27 2007 10:33:51:330AM 1070627007 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix.
Everything looks good.

Next: Repeat, All probes in fluctuation mode.

Jun 27 2007 10:46:27:133AM 1070627008 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix.
Probes in fluctuation mode- Everything looks good.

Next: Repeat, Probes in flow mode, density to NL04=0.8e20

Jun 27 2007 11:07:08:010AM 1070627009 Noah Smick Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix.
Density NL04=~0.8e20

Next: Going to USN: reload shot 1070511019.
Density: NL04=0.5e20
Tentative probe scans

Jun 27 2007 12:23:52:227PM 1070627010 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
WASP did not reach separatrix.
Outer gaps drifting.
Density NL04=~0.6e20m-2, hopefully coming down next shot.
Note that HIREX Sr. was out on shot 9 and half of 8 but came back on 10.

Next: Try to eliminate outer gap drift, reduce inner gap 1mm, plunge WASP deeper

Jun 27 2007 12:23:28:367PM 1070627011 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
WASP ~1mm inside separatrix
Outer gaps stable
Density NL04=~0.55-0.6e20m-2, hopefully coming down next shot.

Next: Repeat, WASP deeper

Jun 27 2007 12:23:18:990PM 1070627012 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04=~0.55-0.6e20m-2
Gaps went all screwy. Plasma seems to have shrunk

Next: Repeat, Fix Gaps

Jun 27 2007 12:22:48:320PM 1070627013 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04=~0.55-0.6e20m-2
Good shot. found shear layer with WASP. Te up to 80+ eV

Next: Go to NL04=0.6e20

Jun 27 2007 12:22:39:287PM 1070627014 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04=~<0.7e20m-2
Good. WASP saw shear layer on 2nd scan, other probes on 3rd

Next: Go next go to fluctuation mode

Jun 27 2007 12:22:27:083PM 1070627015 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04=~0.7e20m-2
Good. More convincing inward particle pinch than in LSN

Next: Density up to NL04=0.8e20

Jun 27 2007 01:24:38:790PM 1070627017 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04=0.85-0.9e20m
WASP 2mm inside separatrix. could go a bit deeper
ASP needs to go deeper

Next: Repeat

Jun 27 2007 01:43:27:427PM 1070627018 Noah Smick USN
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04~<0.85e20m
Good shot. WASP almost 3mm in, good data on all probes

Next: Double Null, cautious plunge depths

Jun 27 2007 02:11:46:460PM 1070627019 Noah Smick DN- well balanced
Li Pellet at 1.4s
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Density NL04~0.8-0.95e20m
Equilibrium different than expected.
WASP over-inserted, especially on first scan.
High density on first scan also, hope it's ok.

Next: Repeat, +5mm on HFS

Jun 27 2007 02:11:13:137PM 1070627020 Noah Smick Dn- well balanced
Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2.
Li Pellet at 1.4s
Density NL04~0.8-0.95e20m
Equilibrium Unstable at .7s and density is high, so move scans later in time.
Move Puff later as well
WASP under-inserted, especially on first scan.

Next: Repeat, WASP deeper

Jun 27 2007 02:24:25:113PM 1070627021 Noah Smick Dn- well balanced
Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25.
Density NL04~0.8-0.95e20m
Some probes under inserted.
Noticed that Upper X-point is too far inboard for upper divertor array to see inner strike point.

Next: Repeat, Probes deeper, upper x-point moved out, ask for lower density (NL04=0.75e20)

Jun 27 2007 02:35:49:247PM 1070627022 Noah Smick LSN near DN: SSEP= -3mm
Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.8e20m
Change in upper x-point shifted L-gap out, WASP not deep enough

Next: Go to near double null, SSEP=2mm, WASP deeper

Jun 27 2007 02:49:23:663PM 1070627023 Noah Smick near DN: SSEP= 0-1mm
Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.85e20m
Change in upper SSEP shifted L-gap out, WASP really deep but seems to be ok.

Next: Try again for SSEP=2mm but approach from upper null, cautious WASP plunge

Jun 27 2007 03:06:35:037PM 1070627024 Noah Smick USN near DN: SSEP= 5mm
Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.85e20m
Nice near DN, but WASP not in deep

Next: Repeat with WASP deeper

Jun 27 2007 03:20:18:487PM 1070627025 Noah Smick USN near DN: SSEP= 5mm
Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25.
Density NL04~0.85e20m
Good shot, good data. Change in flows at 2nd separatrix

Next: go for SSEP=2mm --> move lower x point up

Jun 27 2007 03:35:28:370PM 1070627026 Noah Smick USN near DN: SSEP= 4mm
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.83e20m
Efit says SSEP didn't change much, but probe data implies it got smaller (maybe to 1-2mm). WASP could be a bit deeper

Next: once more, tweak SSEP and targeting

Jun 27 2007 03:54:12:667PM 1070627027 Noah Smick USN near DN: SSEP= 1-2mm
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.86e20m
WASP 3-4mm in. Could be deeper still but we'll take it

Next: move to LSN near DN SSEP=-5mm

Jun 27 2007 04:27:43:833PM 1070627029 Noah Smick LSN near DN: SSEP= -9 to -6mm
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~0.8e20m
Good data on WASP, A-probe not deep enough but we need to move on

Next: back to LSN, NL04=1.0e20m-2

Jun 27 2007 04:37:49:107PM 1070627030 Noah Smick LSN
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Density NL04~1.0e20m
Good data, but WASP and ASP don't quite get there

Next: Repeat, WASP and ASP deeper

Jun 27 2007 04:52:05:710PM 1070627031 Noah Smick LSN
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~1.0e20m
Looks good

Next: Change to USN based on shot 18

Jun 27 2007 05:01:06:220PM 1070627032 Noah Smick USN
Probes scanning at 0.8,1.0,1.2s.
NINJA puffing after 1.25.
Li Pellet at 1.4s
Density NL04~1.02e20m
WASP 2.5 mm in, but could be deeper.

Next: Beer

Physics Operator Comments

Jun 26 2007 03:14:26:197PM Robert Granetz Load DPCS from:
Seg 01 -- from 1070626022, seg 01
Seg 02 -- from 1070511015, seg 02 (LSN, 0.8 MA, 5.4 T)
Seg 03 -- from 1070511019, seg 03 (USN, 0.8 MA, 5.4 T)
Seg 04 -- from 1070614012, seg 04 (DN sweep, 0.8 MA, 5.4 T)

ZXU in Seg 02 was ""called"" to update for the F10 problem.

Numerous changes to nl_04 and gaps were made in multiple segments, as specified in the
session leader's run plan.

The SSEP scan in seg 04 was turned off.

Jun 27 2007 08:51:36:360AM Robert Granetz I turned off the dpcs_ftae2 routine in DPCS (alerted to this by Steve Wolfe).

Jun 27 2007 09:17:28:317AM 1070627001 Robert Granetz Shot 01 -- Plasma. Good shot. LSN, 0.8 MA, 5.4 T, 0.5e20 m-2.

Next shot: decrease inboard gap by 2 mm; increase outer gap by 2 mm.
Turn on NINJA and dust. NINJA will puff at 1.2 s. Dust will
inject around t=1.3 s.

Jun 27 2007 09:29:51:687AM 1070627002 Robert Granetz Shot 02 -- Plasma. Good shot. Gaps okay. However, there was effectively an SSEP scan,
because ZXU still was using F10. I specifically corrected this last night while
preparing the starting shot, but the change is not there now. Really weird.

Next shot: ""call"" ZXU Fluxihh to update so F10 is not used. Ok'd it and loaded it.

Jun 27 2007 09:41:38:337AM 1070627003 Robert Granetz Shot 03 -- Plasma. Good shot. Pseudo-SSEP sweep is finally gone. Gaps look the same.

Next shot: tweak outer gap during latter portion of flattop.

Jun 27 2007 09:54:35:767AM 1070627004 Robert Granetz Shot 04 -- Plasma. Good shot. Some early hard x-rays. Good gap control.

Next shot: reduce inner gap by 1 mm; leave outer gap the same.

Jun 27 2007 10:09:49:340AM 1070627005 Robert Granetz Shot 05 -- Plasma. Good shot.

Next shot: raise nl_04 to 0.6e20 m-2

Jun 27 2007 10:22:17:943AM 1070627006 Robert Granetz Shot 06 -- Plasma. Good shot.

Next shot: no changes

Jun 27 2007 10:35:13:190AM 1070627007 Robert Granetz Shot 07 -- Plasma. Good shot.

Next shot: no DPCS changes

Jun 27 2007 10:45:19:010AM 1070627008 Robert Granetz Shot 08 -- Plasma. Good shot.

Next shot: raise nl_04 to 0.8e20 m-2

Jun 27 2007 11:05:01:510AM 1070627009 Robert Granetz Shot 09 -- Plasma. Good shot.

Next shot: switch to upper null (seg 3)

Jun 27 2007 11:18:30:973AM 1070627010 Robert Granetz Shot 10 -- Plasma. Good shot. Upper null.

Next shot: decrease inner gap by 1 mm; program outer gap to be constant

Jun 27 2007 11:30:00:310AM 1070627011 Robert Granetz Shot 11 -- Plasma. Good shot. Good gaps.

Next shot: no DPCS changes

Jun 27 2007 11:46:14:120AM 1070627012 Robert Granetz Shot 12 -- Plasma. Good shot. Plasma was strangely cold for the first 0.5 seconds,
which drastically changed the power supply responses.

Next shot: try again, no DPCS changes

Jun 27 2007 11:56:35:940AM 1070627013 Robert Granetz Shot 13 -- Plasma. Good shot. Back to normal Te and Wth for first 0.5 seconds.

Next shot: raise nl_04 to 0.6e20 m-2

Jun 27 2007 12:10:49:543PM 1070627014 Robert Granetz Shot 14 -- Plasma. Good shot.

Next shot: no DPCS changes

Jun 27 2007 12:23:27:210PM 1070627015 Robert Granetz Shot 15 -- Plasma. Good shot. Upper null. Another example of unusually low Te
and Wth for first 0.5 s of discharge. No obvious reason for this.

Next shot: raise nl_04 to 0.8e20 m-2. Also start diverting earlier to see if we
can avoid the funny kinetic effect before t=0.5 s on some shots.

Jun 27 2007 01:17:04:173PM 1070627016 Robert Granetz Shot 16 -- Fizzle. Br0 was wrong, but there were no magnetics problems reported, and all
the power supplies look okay. Steve notes that OH2L was off be 1 kA. There are
some small differences way back at t=-1.0 s, but you really have to look
carefully.

Next shot: try again; see if the OH2 problem just goes away.

Jun 27 2007 01:30:54:463PM 1070627017 Robert Granetz Shot 17 -- Plasma. Good shot. OH2L problem went away.

Next shot: Tweak density down. Also, the lithium pellet injector will
fire at t=1.4 s.

Jun 27 2007 01:44:39:913PM 1070627018 Robert Granetz Shot 18 -- Plasma. Good shot. Upper null.

Next shot: change to double null. SSEP is on, but programmed for zero.

Jun 27 2007 01:56:11:453PM 1070627019 Robert Granetz Shot 19 -- Plasma. Good shot. Pretty good double null. Li pellet came in
at t=1.4 s.

Next shot: increase inner gap by 5 mm; decrease outer gap.

Jun 27 2007 02:07:27:087PM 1070627020 Robert Granetz Shot 20 -- Plasma. Good shot. Double null.

Next shot: tweak RCUR to keep the outer gap around 12 mm, and constant.

Jun 27 2007 02:21:06:770PM 1070627021 Robert Granetz Shot 21 -- Plasma. Good shot. Double null. Outer gap is fairly constant
at 12-13 mm, as desired.

Next shot: move RXU out by 3.5 cm. Also tweak nl_04 down to 0.75e20 m-2.

Jun 27 2007 02:36:00:390PM 1070627022 Robert Granetz Shot 22 -- Plasma. Good shot. Double null. Lithium pellet at t=1.4 s.

Next shot: change SSEP to +5 mm.

Jun 27 2007 02:51:21:493PM 1070627023 Robert Granetz Shot 23 -- Plasma. OK shot. Disrupted during rampdown. It's still close to double null.
Gap control is not as good as in preceding shots. This method of trying to get
a barely upper null configuration doesn't seem to be a robust method.

Next shot: Try turning on seg 3 (upper null, as done on shot 18), but move ZXL up by 2 cm.

Jun 27 2007 03:01:45:250PM 1070627024 Robert Granetz Shot 24 -- Plasma. Good shot. Good SSEP (+5 mm).

Next shot: repeat; no DPCS changes

Jun 27 2007 03:21:36:110PM 1070627025 Robert Granetz Shot 25 -- Plasma. Good shot. SSEP = +5 mm.

Next shot: move ZXL up another 5 mm to try and decrease SSEP to +2.5 mm.

Jun 27 2007 03:31:14:603PM 1070627026 Robert Granetz Shot 26 -- Plasma. Good shot. SSEP only dropped by 1 mm to +4 mm.

Next shot: move ZXL in seg 3 another 1 cm up, in order to decrease SSEP some more.

Jun 27 2007 03:57:33:577PM 1070627027 Robert Granetz Shot 27 -- Plasma. Good shot. SSEP is about +1 mm...very close to double null (at least
according to EFIT).

Next shot: switch to lower null; move ZXU down by 3 cm to try and get SSEP around -5 mm.

Jun 27 2007 04:10:36:803PM 1070627028 Robert Granetz Shot 28 -- Fizzle. Fields look pretty good this time. Fill pressure was up by 0.01 mTorr for
some reason. Looks like it might be the DNB, which has apparently just
run out of LHe. It's chamber pressure jumped up to the 10^-5 torr range.

Next shot: disable the DNB gate valve

Jun 27 2007 04:25:41:270PM 1070627029 Robert Granetz Shot 29 -- Plasma. Good shot. SSEP ramps from -1.0 to -0.5 cm during the flattop.

Next shot: reload shot 9 (lower null), but raise nl_04 to 0.95e20 m-2.

Jun 27 2007 04:36:02:043PM 1070627030 Robert Granetz Shot 30 -- Plasma. Good shot. The shot number on the big board is reading zero.

Next shot: reduce inboard and outboard gaps by 2 mm.

Jun 27 2007 04:48:14:490PM 1070627031 Robert Granetz Shot 31 -- Plasma. Good shot.

Next shot: reload shot 1070627018 (upper null); increase nl_04 to 0.95e20 m-2

Jun 27 2007 04:57:42:370PM 1070627032 Robert Granetz Shot 32 -- Plasma. Good shot. Upper null.

End of run

Engineering Operator Comments

Shot Time Type Status Comment

1 09:04:33:277AM Plasma Ok

2 09:17:27:207AM Plasma Ok

3 09:31:23:220AM Plasma Ok

4 09:44:09:963AM Plasma Ok

5 09:57:46:003AM Plasma Ok

6 10:13:02:187AM Plasma Ok

7 10:25:17:603AM Plasma Ok

8 10:38:11:350AM Plasma Ok

9 10:50:53:437AM Plasma Ok

10 11:05:37:023AM Plasma Ok

11 11:19:24:240AM Plasma Ok

12 11:33:07:110AM Plasma Ok

13 11:47:06:480AM Plasma Ok

14 11:59:25:800AM Plasma Ok

15 12:12:06:030PM Plasma Ok

16 12:32:59:357PM Plasma Ok

17 01:17:17:080PM Plasma Ok

18 01:30:28:823PM Plasma Ok

19 01:45:02:227PM Plasma Ok

20 01:57:28:040PM Plasma Ok

21 02:09:59:467PM Plasma Ok

22 02:22:38:350PM Plasma Ok

23 02:36:54:483PM Plasma Ok

24 02:52:09:510PM Plasma Ok

25 03:10:58:010PM Plasma Ok

26 03:23:25:707PM Plasma Ok

27 03:45:18:317PM Plasma Ok

28 03:59:20:310PM Plasma Ok

29 04:11:50:710PM Plasma Ok

30 04:27:09:990PM Plasma Ok

31 04:41:42:563PM Plasma Ok

32 04:54:13:743PM Plasma Ok

System Availability

Jun 27 2007 09:04:04:870AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec
Bolometers yes 2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data. May 29 2007 11:22AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes First Boronization 5/9/07 May 10 2007 04:55PM (irby) Jim Irby Boronization dekow,irby
CNPA no Jan 14 2007 02:06PM Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes The cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation. May 30 2007 07:58PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Jun 20 2007 05:35PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Mar 11 2007 10:28PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes camera is re-installed, and view has been calibrated Feb 26 2007 03:28PM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Jan 14 2007 02:02PM Bob Granetz Gas Jet granetz,whyte
Divertor IR no Mar 06 2007 10:50AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 06 2007 10:51AM Glen Wurden Divertor IR Spectroscopy gwurden,ldorf,terry
DNB yes All systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shots Mar 28 2007 09:36AM (beals) Bob Granetz Diagnostic Beam beals,granetz
FRC-ECE no Only high frequency channels now working (17 to 32). LO looks good. Most likely it is the 5V supply for mixer bais and amp that is the problem. Jun 20 2007 09:23AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes The gauge is operational. Mar 30 2007 10:54AM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes Chs 1-8 operational. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes New view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational. Mar 27 2007 01:59PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes spectral calibration needs to be checked, but system should be ready for the run Feb 26 2007 03:28PM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes Storing Data, but profiles not yet available Apr 27 2007 01:20PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes 80.5 MHz. Max power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes 80 MHz. Maxc power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes 78 MHz. dipole configuration. Using #4 transmitter only. Max power about 1.5 MW instead of 3 MW. Jun 20 2007 09:22AM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid no 6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes Apr 26 2007 08:35PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane data being digitized, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged. May 29 2007 11:23AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Working normally. Apr 19 2007 09:52AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Mar 28 2007 08:33AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no (1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Both neutron systems are fully operational Apr 05 2007 11:19AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes operational Mar 21 2007 04:29PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter). Mar 29 2007 11:47AM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes The system is to be optimized. May 30 2007 01:12PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes 8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'. Mar 13 2007 10:01PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational. Mar 27 2007 01:53PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Retro shutter closed Mar 15 2007 11:00AM (irby) Jim Irby C-Mod Polarimeter irby
Probe Array - ISD yes Probes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:47PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes All 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Probes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes 14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis. Mar 13 2007 12:46PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes All low frequency channels (50, 60, 75, 88, 88u, 88l and 110) have been installed (for the first time!) on 1070626. Thery are being tested. The PPPL variable frequency channel is installed and being run (for now) at fixed frequency (Voltage set at 6V). 140GHz channel still down. Throughout the day (1070626), the 50GHz channel hasn't worked properly. Jun 26 2007 10:44AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Perpendicular Mach probe head is installed. The drive is operational. Mar 15 2007 09:09PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Perpendicular Mach probe head is installed. The probe drive is now operational. Mar 13 2007 09:51PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed. Apr 12 2007 04:18PM (nsmick) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes NL_04 at 71.04 cm from 3/9/07 calibration May 23 2007 07:38AM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers, 11 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks. May 10 2007 10:37AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes
TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -124.5mm (standard). Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Jun 14 2007 06:21PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes
Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf

Session Leader Comments
Jun 27 2007 10:28:15:433AM	1070627001	Noah Smick	Good density control, but unintentional SSEP ramp persists late in shot. WASP did not fire. Other probes scanning at 0.7,0.9,1.1s. No puffs this shot. Next: reduce left gap by 2mm, scan probes deeper. NINJA will be puffing
Jun 27 2007 10:27:49:293AM	1070627002	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Targeting is good. WASP 0-1mm beyond separatrix. SSEP scan is present because the necessary change was not implemented. Should be fixed now. Next: Repeat for one more targeting tweak. WASP to scan 1mm deeper
Jun 27 2007 10:27:24:137AM	1070627003	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 1mm beyond separatrix. SSEP scan is gone, A probe held back to see what the gaps did with the SSEP change. Will need one more shot at this configuration Next: Repeat. WASP to scan 1mm deeper
Jun 27 2007 10:26:41:400AM	1070627005	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix. Perfect. Te to 70 eV and agreeing on all electrodes Next: Increase density to NL04=0.6e20
Jun 27 2007 10:26:13:853AM	1070627006	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix. Density ~< 0.7e20, good F probe not deep enough Next: Repeat, F probe needs to go deeper.
Jun 27 2007 10:33:51:330AM	1070627007	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix. Everything looks good. Next: Repeat, All probes in fluctuation mode.
Jun 27 2007 10:46:27:133AM	1070627008	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix. Probes in fluctuation mode- Everything looks good. Next: Repeat, Probes in flow mode, density to NL04=0.8e20
Jun 27 2007 11:07:08:010AM	1070627009	Noah Smick	Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP 2mm beyond separatrix. Density NL04=~0.8e20 Next: Going to USN: reload shot 1070511019. Density: NL04=0.5e20 Tentative probe scans
Jun 27 2007 12:23:52:227PM	1070627010	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP did not reach separatrix. Outer gaps drifting. Density NL04=~0.6e20m-2, hopefully coming down next shot. Note that HIREX Sr. was out on shot 9 and half of 8 but came back on 10. Next: Try to eliminate outer gap drift, reduce inner gap 1mm, plunge WASP deeper
Jun 27 2007 12:23:28:367PM	1070627011	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. WASP ~1mm inside separatrix Outer gaps stable Density NL04=~0.55-0.6e20m-2, hopefully coming down next shot. Next: Repeat, WASP deeper
Jun 27 2007 12:23:18:990PM	1070627012	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04=~0.55-0.6e20m-2 Gaps went all screwy. Plasma seems to have shrunk Next: Repeat, Fix Gaps
Jun 27 2007 12:22:48:320PM	1070627013	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04=~0.55-0.6e20m-2 Good shot. found shear layer with WASP. Te up to 80+ eV Next: Go to NL04=0.6e20
Jun 27 2007 12:22:39:287PM	1070627014	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04=~<0.7e20m-2 Good. WASP saw shear layer on 2nd scan, other probes on 3rd Next: Go next go to fluctuation mode
Jun 27 2007 12:22:27:083PM	1070627015	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04=~0.7e20m-2 Good. More convincing inward particle pinch than in LSN Next: Density up to NL04=0.8e20
Jun 27 2007 01:24:38:790PM	1070627017	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04=0.85-0.9e20m WASP 2mm inside separatrix. could go a bit deeper ASP needs to go deeper Next: Repeat
Jun 27 2007 01:43:27:427PM	1070627018	Noah Smick	USN Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04~<0.85e20m Good shot. WASP almost 3mm in, good data on all probes Next: Double Null, cautious plunge depths
Jun 27 2007 02:11:46:460PM	1070627019	Noah Smick	DN- well balanced Li Pellet at 1.4s Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Density NL04~0.8-0.95e20m Equilibrium different than expected. WASP over-inserted, especially on first scan. High density on first scan also, hope it's ok. Next: Repeat, +5mm on HFS
Jun 27 2007 02:11:13:137PM	1070627020	Noah Smick	Dn- well balanced Probes scanning at 0.7,0.9,1.1s. NINJA puffing after 1.2. Li Pellet at 1.4s Density NL04~0.8-0.95e20m Equilibrium Unstable at .7s and density is high, so move scans later in time. Move Puff later as well WASP under-inserted, especially on first scan. Next: Repeat, WASP deeper
Jun 27 2007 02:24:25:113PM	1070627021	Noah Smick	Dn- well balanced Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Density NL04~0.8-0.95e20m Some probes under inserted. Noticed that Upper X-point is too far inboard for upper divertor array to see inner strike point. Next: Repeat, Probes deeper, upper x-point moved out, ask for lower density (NL04=0.75e20)
Jun 27 2007 02:35:49:247PM	1070627022	Noah Smick	LSN near DN: SSEP= -3mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.8e20m Change in upper x-point shifted L-gap out, WASP not deep enough Next: Go to near double null, SSEP=2mm, WASP deeper
Jun 27 2007 02:49:23:663PM	1070627023	Noah Smick	near DN: SSEP= 0-1mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.85e20m Change in upper SSEP shifted L-gap out, WASP really deep but seems to be ok. Next: Try again for SSEP=2mm but approach from upper null, cautious WASP plunge
Jun 27 2007 03:06:35:037PM	1070627024	Noah Smick	USN near DN: SSEP= 5mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.85e20m Nice near DN, but WASP not in deep Next: Repeat with WASP deeper
Jun 27 2007 03:20:18:487PM	1070627025	Noah Smick	USN near DN: SSEP= 5mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Density NL04~0.85e20m Good shot, good data. Change in flows at 2nd separatrix Next: go for SSEP=2mm --> move lower x point up
Jun 27 2007 03:35:28:370PM	1070627026	Noah Smick	USN near DN: SSEP= 4mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.83e20m Efit says SSEP didn't change much, but probe data implies it got smaller (maybe to 1-2mm). WASP could be a bit deeper Next: once more, tweak SSEP and targeting
Jun 27 2007 03:54:12:667PM	1070627027	Noah Smick	USN near DN: SSEP= 1-2mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.86e20m WASP 3-4mm in. Could be deeper still but we'll take it Next: move to LSN near DN SSEP=-5mm
Jun 27 2007 04:27:43:833PM	1070627029	Noah Smick	LSN near DN: SSEP= -9 to -6mm Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~0.8e20m Good data on WASP, A-probe not deep enough but we need to move on Next: back to LSN, NL04=1.0e20m-2
Jun 27 2007 04:37:49:107PM	1070627030	Noah Smick	LSN Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Density NL04~1.0e20m Good data, but WASP and ASP don't quite get there Next: Repeat, WASP and ASP deeper
Jun 27 2007 04:52:05:710PM	1070627031	Noah Smick	LSN Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~1.0e20m Looks good Next: Change to USN based on shot 18
Jun 27 2007 05:01:06:220PM	1070627032	Noah Smick	USN Probes scanning at 0.8,1.0,1.2s. NINJA puffing after 1.25. Li Pellet at 1.4s Density NL04~1.02e20m WASP 2.5 mm in, but could be deeper. Next: Beer

Physics Operator Comments
Jun 26 2007 03:14:26:197PM		Robert Granetz	Load DPCS from: Seg 01 -- from 1070626022, seg 01 Seg 02 -- from 1070511015, seg 02 (LSN, 0.8 MA, 5.4 T) Seg 03 -- from 1070511019, seg 03 (USN, 0.8 MA, 5.4 T) Seg 04 -- from 1070614012, seg 04 (DN sweep, 0.8 MA, 5.4 T) ZXU in Seg 02 was ""called"" to update for the F10 problem. Numerous changes to nl_04 and gaps were made in multiple segments, as specified in the session leader's run plan. The SSEP scan in seg 04 was turned off.
Jun 27 2007 08:51:36:360AM		Robert Granetz	I turned off the dpcs_ftae2 routine in DPCS (alerted to this by Steve Wolfe).
Jun 27 2007 09:17:28:317AM	1070627001	Robert Granetz	Shot 01 -- Plasma. Good shot. LSN, 0.8 MA, 5.4 T, 0.5e20 m-2. Next shot: decrease inboard gap by 2 mm; increase outer gap by 2 mm. Turn on NINJA and dust. NINJA will puff at 1.2 s. Dust will inject around t=1.3 s.
Jun 27 2007 09:29:51:687AM	1070627002	Robert Granetz	Shot 02 -- Plasma. Good shot. Gaps okay. However, there was effectively an SSEP scan, because ZXU still was using F10. I specifically corrected this last night while preparing the starting shot, but the change is not there now. Really weird. Next shot: ""call"" ZXU Fluxihh to update so F10 is not used. Ok'd it and loaded it.
Jun 27 2007 09:41:38:337AM	1070627003	Robert Granetz	Shot 03 -- Plasma. Good shot. Pseudo-SSEP sweep is finally gone. Gaps look the same. Next shot: tweak outer gap during latter portion of flattop.
Jun 27 2007 09:54:35:767AM	1070627004	Robert Granetz	Shot 04 -- Plasma. Good shot. Some early hard x-rays. Good gap control. Next shot: reduce inner gap by 1 mm; leave outer gap the same.
Jun 27 2007 10:09:49:340AM	1070627005	Robert Granetz	Shot 05 -- Plasma. Good shot. Next shot: raise nl_04 to 0.6e20 m-2
Jun 27 2007 10:22:17:943AM	1070627006	Robert Granetz	Shot 06 -- Plasma. Good shot. Next shot: no changes
Jun 27 2007 10:35:13:190AM	1070627007	Robert Granetz	Shot 07 -- Plasma. Good shot. Next shot: no DPCS changes
Jun 27 2007 10:45:19:010AM	1070627008	Robert Granetz	Shot 08 -- Plasma. Good shot. Next shot: raise nl_04 to 0.8e20 m-2
Jun 27 2007 11:05:01:510AM	1070627009	Robert Granetz	Shot 09 -- Plasma. Good shot. Next shot: switch to upper null (seg 3)
Jun 27 2007 11:18:30:973AM	1070627010	Robert Granetz	Shot 10 -- Plasma. Good shot. Upper null. Next shot: decrease inner gap by 1 mm; program outer gap to be constant
Jun 27 2007 11:30:00:310AM	1070627011	Robert Granetz	Shot 11 -- Plasma. Good shot. Good gaps. Next shot: no DPCS changes
Jun 27 2007 11:46:14:120AM	1070627012	Robert Granetz	Shot 12 -- Plasma. Good shot. Plasma was strangely cold for the first 0.5 seconds, which drastically changed the power supply responses. Next shot: try again, no DPCS changes
Jun 27 2007 11:56:35:940AM	1070627013	Robert Granetz	Shot 13 -- Plasma. Good shot. Back to normal Te and Wth for first 0.5 seconds. Next shot: raise nl_04 to 0.6e20 m-2
Jun 27 2007 12:10:49:543PM	1070627014	Robert Granetz	Shot 14 -- Plasma. Good shot. Next shot: no DPCS changes
Jun 27 2007 12:23:27:210PM	1070627015	Robert Granetz	Shot 15 -- Plasma. Good shot. Upper null. Another example of unusually low Te and Wth for first 0.5 s of discharge. No obvious reason for this. Next shot: raise nl_04 to 0.8e20 m-2. Also start diverting earlier to see if we can avoid the funny kinetic effect before t=0.5 s on some shots.
Jun 27 2007 01:17:04:173PM	1070627016	Robert Granetz	Shot 16 -- Fizzle. Br0 was wrong, but there were no magnetics problems reported, and all the power supplies look okay. Steve notes that OH2L was off be 1 kA. There are some small differences way back at t=-1.0 s, but you really have to look carefully. Next shot: try again; see if the OH2 problem just goes away.
Jun 27 2007 01:30:54:463PM	1070627017	Robert Granetz	Shot 17 -- Plasma. Good shot. OH2L problem went away. Next shot: Tweak density down. Also, the lithium pellet injector will fire at t=1.4 s.
Jun 27 2007 01:44:39:913PM	1070627018	Robert Granetz	Shot 18 -- Plasma. Good shot. Upper null. Next shot: change to double null. SSEP is on, but programmed for zero.
Jun 27 2007 01:56:11:453PM	1070627019	Robert Granetz	Shot 19 -- Plasma. Good shot. Pretty good double null. Li pellet came in at t=1.4 s. Next shot: increase inner gap by 5 mm; decrease outer gap.
Jun 27 2007 02:07:27:087PM	1070627020	Robert Granetz	Shot 20 -- Plasma. Good shot. Double null. Next shot: tweak RCUR to keep the outer gap around 12 mm, and constant.
Jun 27 2007 02:21:06:770PM	1070627021	Robert Granetz	Shot 21 -- Plasma. Good shot. Double null. Outer gap is fairly constant at 12-13 mm, as desired. Next shot: move RXU out by 3.5 cm. Also tweak nl_04 down to 0.75e20 m-2.
Jun 27 2007 02:36:00:390PM	1070627022	Robert Granetz	Shot 22 -- Plasma. Good shot. Double null. Lithium pellet at t=1.4 s. Next shot: change SSEP to +5 mm.
Jun 27 2007 02:51:21:493PM	1070627023	Robert Granetz	Shot 23 -- Plasma. OK shot. Disrupted during rampdown. It's still close to double null. Gap control is not as good as in preceding shots. This method of trying to get a barely upper null configuration doesn't seem to be a robust method. Next shot: Try turning on seg 3 (upper null, as done on shot 18), but move ZXL up by 2 cm.
Jun 27 2007 03:01:45:250PM	1070627024	Robert Granetz	Shot 24 -- Plasma. Good shot. Good SSEP (+5 mm). Next shot: repeat; no DPCS changes
Jun 27 2007 03:21:36:110PM	1070627025	Robert Granetz	Shot 25 -- Plasma. Good shot. SSEP = +5 mm. Next shot: move ZXL up another 5 mm to try and decrease SSEP to +2.5 mm.
Jun 27 2007 03:31:14:603PM	1070627026	Robert Granetz	Shot 26 -- Plasma. Good shot. SSEP only dropped by 1 mm to +4 mm. Next shot: move ZXL in seg 3 another 1 cm up, in order to decrease SSEP some more.
Jun 27 2007 03:57:33:577PM	1070627027	Robert Granetz	Shot 27 -- Plasma. Good shot. SSEP is about +1 mm...very close to double null (at least according to EFIT). Next shot: switch to lower null; move ZXU down by 3 cm to try and get SSEP around -5 mm.
Jun 27 2007 04:10:36:803PM	1070627028	Robert Granetz	Shot 28 -- Fizzle. Fields look pretty good this time. Fill pressure was up by 0.01 mTorr for some reason. Looks like it might be the DNB, which has apparently just run out of LHe. It's chamber pressure jumped up to the 10^-5 torr range. Next shot: disable the DNB gate valve
Jun 27 2007 04:25:41:270PM	1070627029	Robert Granetz	Shot 29 -- Plasma. Good shot. SSEP ramps from -1.0 to -0.5 cm during the flattop. Next shot: reload shot 9 (lower null), but raise nl_04 to 0.95e20 m-2.
Jun 27 2007 04:36:02:043PM	1070627030	Robert Granetz	Shot 30 -- Plasma. Good shot. The shot number on the big board is reading zero. Next shot: reduce inboard and outboard gaps by 2 mm.
Jun 27 2007 04:48:14:490PM	1070627031	Robert Granetz	Shot 31 -- Plasma. Good shot. Next shot: reload shot 1070627018 (upper null); increase nl_04 to 0.95e20 m-2
Jun 27 2007 04:57:42:370PM	1070627032	Robert Granetz	Shot 32 -- Plasma. Good shot. Upper null. End of run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:04:33:277AM	Plasma	Ok
2	09:17:27:207AM	Plasma	Ok
3	09:31:23:220AM	Plasma	Ok
4	09:44:09:963AM	Plasma	Ok
5	09:57:46:003AM	Plasma	Ok
6	10:13:02:187AM	Plasma	Ok
7	10:25:17:603AM	Plasma	Ok
8	10:38:11:350AM	Plasma	Ok
9	10:50:53:437AM	Plasma	Ok
10	11:05:37:023AM	Plasma	Ok
11	11:19:24:240AM	Plasma	Ok
12	11:33:07:110AM	Plasma	Ok
13	11:47:06:480AM	Plasma	Ok
14	11:59:25:800AM	Plasma	Ok
15	12:12:06:030PM	Plasma	Ok
16	12:32:59:357PM	Plasma	Ok
17	01:17:17:080PM	Plasma	Ok
18	01:30:28:823PM	Plasma	Ok
19	01:45:02:227PM	Plasma	Ok
20	01:57:28:040PM	Plasma	Ok
21	02:09:59:467PM	Plasma	Ok
22	02:22:38:350PM	Plasma	Ok
23	02:36:54:483PM	Plasma	Ok
24	02:52:09:510PM	Plasma	Ok
25	03:10:58:010PM	Plasma	Ok
26	03:23:25:707PM	Plasma	Ok
27	03:45:18:317PM	Plasma	Ok
28	03:59:20:310PM	Plasma	Ok
29	04:11:50:710PM	Plasma	Ok
30	04:27:09:990PM	Plasma	Ok
31	04:41:42:563PM	Plasma	Ok
32	04:54:13:743PM	Plasma	Ok