Alcator C-Mod Run 1070619 Information

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Miniproposals
Miniproposal:473
Date Filed: 3/9/2007
Title:Lower Hybrid System Check-out and Initial operation
First Author:J. Randall Wilson
Session Leader:Greg Wallace (shots 1-26)

Operators
Session leader(s):Greg Wallace
Physics operator(s):Steve Wolfe
Engineering operator(s):Bill Cochran,Bill Parkin,Bill Byford

Engineering Operator Run Comment
automatically entered by signon - please replace with real comment

Session Leader Plans
Entered: Jun 19 2007 09:17:04:590AM
Author: Greg Wallace
Start with shot 1070613016.
Set launcher to 1.5mm behind limiter and set phase shifters to 60deg ideal
current drive direction. LH will fire from 800ms to 1300ms. Klystron 5 will be
turned off completely and the CPS bypassed on associated channels. We may later
disable klystrons 7 and/or 12.

We will be staying at 5.4T all day for MSE.

Start with ~400kW of LH power at 60 degree ideal phasing. Check to make sure
the CPS is working correctly and we are not arcing in the waveguides. Increase
power to 600kW then 800+kW. We will be looking for clean (no/minimal trips) LH
pulses from .8-1.3s. It will require some tweaking to the drive level of the
individual klystrons to increase the power level.

Once "reliable" operation at net power greater than 700kW is achieved, add ICRF
from J and E at 1MW each. This may require a cell access to add some
attenuators to the protection system. If plasma goes into H-mode and density
rises dramatically, try switching to upper null. Starting upper null shot would
be 1070607008.

Cell Access to change phase shifters to 0 degrees.

Run 500ms shots with the first half in co-current-drive and the second half in
counter-current-drive, 120 degree approximate phasing in both cases, at the
maximum power level we can achieve without too many trips. This should give an
n|| spectrum similar to 60 degree ideal phasing, but with a slightly wider
spectral peak. We would like to see some changes with MSE between the co- and
counter-current-drive segments. We expect that getting the system to run in
this configuration will be a bit tricky, especially since we have no experience
running higher power in counter-current-drive configuration.

Physics Operators Plans
Entered: Jun 18 2007 02:11:45:860PM
Author: Steve Wolfe
Physics Operator plan and Engineering setup for 
Tuesday, 19-Jun-2007

MP#473: LH power pushing, current drive
SL: Wallace
PO: Wolfe

Engineering setup:
-----------------
ECDC overnight in D2, pressure=2e-4 Torr.  Rmin/Rdwell/Rmax = 44/45/103 cm.
Bake at 60 C.

Power systems as on 1070613001

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)
pumpout NINJA            and leave       DISABLED

Enable the following gate valves and shutters, assuming no vacuum problems:
  ECE, VUV, Z-bolo shutters.  Enable DNB gate valve when requested by
  DNB operator.

Torvac setup: Gate valves open

ICRF: Transmitters #2 and 3 in RUN ON by 08:30 

Physop plan:
--------------

Start from 1070613001 or similar shot, possibly with nl04 changed 
(see SL_PLAN, when it's posted). 



Session Leader Summaries
Entered: Jun 19 2007 05:31:33:523PM
Author: Greg Wallace
All shots today were at 60 degree phasing (n||=1.5). The accessibility limit at
this phasing and 5.4T is ~6e19 m^-3.

First few shots went well getting full length pulses up to 575kW. Interestingly
pickup on the spectrum analyzer was much higher than normal by nearly 30dB. Put
in 30dB of attenuators to protect the analyzer from damage after shot 3.

Many attempts were made but could not get net powers above 600kW to run clean.
Arcing was a problem in several waveguides on klystrons 2, 4, and 11. At this
point, 6 of the 12 klystrons must run with zero or reduced (below 100kW) power.

After failing to increase net power above 600kW, some investigation of LH & ICRF
was tried. 1MW each from J and E did not have deleterious effect on LH coupling,
but rise in density due to ICRF did kill the current drive effect. This is
probably because the density rose to inaccessible levels in the core region, even
taking n|| up-shift into account. With 2MW of ICRF these plasmas did not go into
H-mode due to the "low" core density. 90 degree phasing will definately be
required for future ICRF & LH operation, especially into H-mode.

Physics Operator Summaries
Entered: Jun 19 2007 05:44:23:000PM
Author: Steve Wolfe
Physics Operator Summary for Tuesday, June 19, 2007

MP#473 LH commissioning
SL: Wallace
PO: Wolfe
EO: Cochran, Parkin, Byford


This was not a very exciting run from the physics operator's perspective. 
We stayed in LSN with essentially the same shape all day, 
modified from the starting shot (based on 1070613016) only by increasing
RXU by 1cm for shot#2 to equalize the probe readings at the top and
bottom of the LH grill. The nominal outer gap was zero according
to EFIT, which seems to actually be a couple of mm. 

Shots #9,12, and 16 were at 1MA, all the rest were 800kA. 
I spent the first half of the day chasing the startup to try
to get rid of early runaways, without a lot of success. A number of
these early runaway shots also had minor disruptions between 0.1 and 0.2 
seconds which dumped the runaways and also took a chunk out of the current. 
These were presumably due to MHD activity associated with the runaway
beam. I also did some adjusting of the initial current in seg2 and the
CLEARIN and ZCUR ramps in the 0.1 to 0.3 sec interval, which may have
helped. 

Shots#1-16 had only LH, and #17-26 were combined LH and ICRF. 

Aside from the runaways, the main problem today was post-disruption 
fizzles after early rampdown disruptions on 9 and 12. In the course of
trying to get past these I ended up undoing most of the startup tweaks
I had made earlier, including 20 A on EF4 and greatly increased pg4
puff (up to 27msec). The main symptom on in the fizzles was high CIII
level (over 0.01) and very low current. The rampdown disruption was fixed
at shot#16 by some small adjustments to the ramps on RXU and ZXL. 

Most of the day we used the density programming of 1070613016, which 
had an initial value of 5e19 and then dropped to 3.5e19 at 0.5sec.
On the next to last shot #25 we removed the early rise and programmed
3.5e19 with no additional pg3 in segment 2, and got a somewhat lower
density, though it still came up during the combined LH and ICRF. Since
some gas was still being demanded in the early phase of this shot, for the 
last shot #26 I changed the program demand from 3.5 to 2e19. This resulted 
in a locked mode at 0.5 sec and eventually a disruption at ~1sec,
despite using standard feedback on the A-coils. 

We had several power room accesses for the engineers to investigate
a sharing problem among the TF cabinets. This problem could be related
to the fiber optic links (AFOLs) in the supply, but still hasn't been 
resolved. 

Shot#13 was a no-power shot due to an alternator spin down (trip to 
speed 1), which was blamed on a phantom C-Mod fault signal received at 
the alternator, for no apparent reason.  

Scorecard:
-----------
               No power   1
               Duds       0
               Fizzles    4
               Plasmas   21
               ========  ==
               Shots     26


Session Leader Comments
Jun 19 2007 05:04:24:877PM1070619001Greg WallaceGood shot. One trip and successful retry at 400kW net. ~.3V reduction in Vloop. Density on the top row is a bit low as see on the LH probes and the top row REFCO. Next shot will move upper x-point out radially by 1cm and increase the LH power to 100kW per klystron, keeping klystron 11 at 75kW.

Netpow=380kW
Jun 19 2007 05:04:47:753PM1070619002Greg WallaceAnother clean shot. No trips. Netpow around 475kW and refco around 25% overall. Reflections still a bit high on the top row but density looks more even between top and bottom. Vloop decreased by 0.4-0.5V. Next shot will increase klystron power to 125kW each except #11.

Netpow=480kW
Jun 19 2007 05:05:13:207PM1070619003Greg WallaceAdded 30dB of attenuation to the spectrum analyzer due to abnormally high fundamental frequency level.

Short pulse then tripped out and retry was not successful. Next shot will turn down power on klystron 4.

Netpow=610kW
Jun 19 2007 05:05:36:330PM1070619004Greg WallaceAnother full length shot. ~.4V reduction in Vloop at 575kW. Next shot will increase power to 150kW per klystron except #4.

Netpow=560kW
Jun 19 2007 05:05:57:940PM1070619005Greg WallaceShort pulse tripped out and did not retry successfully. Appears to be an arc between the IDC and JGDC in klystron 2. Next shot will decrease power in klystron 2 and keep others same.

Netpow=680kW
Jun 19 2007 05:06:33:067PM1070619006Greg WallaceMany trips. Next shot will increase the length of the ramp and decrease the power from klystron 2.

Netpow=670kW
Jun 19 2007 05:06:54:550PM1070619007Greg WallaceLooks like there might be some arcing in the jungle gym between the IDC and JGDC for klystron 7, specifically the problem appears to be in waveguide 13.

Next shot will try turning klystrons down to 130kW from 150kW.

Netpow=650kW
Jun 19 2007 05:07:17:600PM1070619008Greg WallaceShot ran nearly full length. 0.5V steady reduction in Vloop at 575kW net power. Density looks good for all LH probes. Next shot will increase Ip to 1MA.

Netpow=560kW
Jun 19 2007 05:07:42:083PM1070619009Greg WallaceMany trips. Looks like arcing in the jungle gym on RINT 7.

Netpow=630kW
Jun 19 2007 01:16:12:040PM1070619010Greg WallacePost-disruption fizzle. Cell access to add attenuator on RINT4 diode leg.
Jun 19 2007 12:10:24:850PM1070619011Greg WallaceAnother fizzle.
Jun 19 2007 05:08:27:160PM1070619012Greg WallaceAnother disruption at 1.65s. LH tripped out early and did not come back. Attenuator was accidentally put on FINT, not RINT! This made the problem worse. Cell access to fix the problem.

Netpow=500kW
Jun 19 2007 01:08:09:067PM1070619013Greg WallaceNo power shot.
Jun 19 2007 01:08:16:580PM1070619014Greg WallaceFizzle.
Jun 19 2007 01:27:24:487PM1070619015Greg WallaceFizzle.
Jun 19 2007 05:10:46:537PM1070619016Greg WallaceTripping appears to be caused by waveguide 7T. Next shot will bring plasma current down to 800kA and add 1MW of ICRF from J at .7s to 1.4s. Perhaps the higher temperature will help with more effecient current drive.

Netpow=640kW
Jun 19 2007 05:11:08:383PM1070619017Greg WallaceClean shot at 450kW LH and 900kW ICRF from J. Not much current drive. Next shot will add .5MW from E and turn up the LH power a bit.

Netpow=450kW
Jun 19 2007 05:11:31:617PM1070619018Greg WallaceLH tripped out after 85ms. 1.5MW of ICRF doesn't seem to be a problem. Next shot will decrease LH power slightly.

Netpow=500kW
Jun 19 2007 05:11:50:290PM1070619019Greg WallaceMany trips, with one successful retry. Net power made it up to 550kW. Looks like arcing in waveguide 6 or 7. Will turn down LH power slightly.

Netpow=550
Jun 19 2007 05:12:12:523PM1070619020Greg WallaceMore trips. The problem appears to be high intrinsic reflection in waveguide 7bottom. This could be an "end waveguide" effect since klystron 5 is shut off completely. Next shot will increase phase on klystron 4 by 10 degrees to mitigate the end effect.

Netpow=500kW
Jun 19 2007 05:12:36:710PM1070619021Greg WallaceChanging phase +10 degrees didn't help. Next shot will try -10 degrees compared to shot 20.

Netpow=310kW
Jun 19 2007 05:12:58:540PM1070619022Greg WallaceSomewhat better, but still high reflections on waveguide 7. Next shot will decrease power on klystron 3 to reduce reflected power in waveguide 7.

Netpow=500kW
Jun 19 2007 05:13:25:773PM1070619023Greg WallacePulse was clean until almost the end of the pulse. Net power of about 475kW with 1.4MW of ICRF from E and J. Next shot will increase power to 1MW from E.

Netpow=470kW
Jun 19 2007 05:14:01:993PM1070619024Greg WallaceNearly clean LH pulse again with 2MW of ICRF. Very little sign of current drive, possibly due to higher line averaged density. 60 degree phasing will not be accessabile at this core density. Next shot will *try* to decrease density a bit.

Netpow=475kW
Jun 19 2007 05:14:26:680PM1070619025Greg WallaceLH ran well, although density still was a bit high for accessability. Next shot will try to decrease the density a bit more.

Netpow=475kW
Jun 19 2007 05:14:47:387PM1070619026Greg WallaceLast shot of the day. LH tripped out and plasma disrupted at 1s.

Netpow=400kW

Physics Operator Comments
Jun 19 2007 07:46:39:210AMSteve Wolfe
Load from starting shot 1070613016 (per SL email)
This is an 800kA LSN with nl04 programmed to 3.5e19
after 0.5sec. 
For reasons unknown to me, the nl04 gain
starts at 9 at -2 sec, then drops to 8 at 0.2sec; also, there is
a 50V pg3 puff in seg2 dropping off by 0.5sec. Maybe supposed to
help with runaways or slowing current rise? Leave it for now. 

There's a non-zero point on wire 12 (zero12) in seg2. Probably left
over from a timestamp issue patch. Reset to zero. 

Startup is from before we started using the Int gain on oh1 and I 
reprogrammed the current ramp on OH2. That's ok as long as the supplies
behave. RCur=1000, Br0=-.003, pg4=20msec. All ok as a starting point. 

Move seg2 integrator C gate from 0.3 to 0.2sec
Load at 19-Jun-2007 07:46:24.00
Open tree /home/wolfe/pcs_scratch      -1
Open tree done

 

Jun 19 2007 08:28:32:037AMSteve Wolfe
Since we may be going to upper null later in the day,
go ahead and import seg3 from 1070607008 as specified in SL_PLAN
This is 1MA UN at higher density (6e19) than starting condition. 
Check the wires and load it (seg2 still on, seg3 off)
Load at 19-Jun-2007 08:28:21.00
Open tree /home/wolfe/pcs_scratch      -1
Open tree done


Jun 19 2007 08:33:23:590AMSteve Wolfe
Requested EO to change C-coil start time from 0.3sec to 0.2sec



Jun 19 2007 09:18:17:903AM1070619001Steve Wolfe
Shot#1: Supposed to be like 1070613016 (LSN, 800kA, nl04=3.5e19,very small
outer gap) for LH (start at 0.8sec
plasma with runaways starting at 0.8sec. 

Magnetics warnings on f10 and bp11_bc (11mV), probably ok.
Looks ok. Nothing obviously broken. breakdown looks ok. 
LH net power=400kW, 1 dropout. 

Next: Move RXU out to improve density at top of grill


Jun 19 2007 09:32:38:540AM1070619002Steve Wolfe
Shot#2:  Move RXU out from 0.035 to 0.045 to increase density 
near top of grill.

plasma, some early runaways, but no startup bounce; dumps at ~0.23sec
breakdown is a bit late at 6.8msec.
Still seeing ~11mT baseline offset on bp11 (also f10 and f11 offsets)
but I think its because of the long TF tail. 

Greg likes the density match across the grill better this time. 

Next: Increase seg1 IC_EF4U by 10A


Jun 19 2007 09:51:46:367AM1070619003Steve Wolfe
Shot#3:  Increase seg1 IC_EF4U from -1335 to -1325 to tweak breakdown, 
early runaways. If this doesn't help, try increasing pg4 next time.

plasma, still with early runaways. breakdown time is back to 5.8ms,
no obvious bounce. Bz0 still looks negative. 
LH up to 600kW, but lots of trips after the first 100ms.

Next: increase pg4 by 3ms




Jun 19 2007 10:26:01:847AM1070619004Steve Wolfe
Shot#4: increase pg4 from 20 to 23ms
Cell access before this shot to change an attenuator on LH 

plasma, still some early runaways, but better. breakdown
looks ok. Still a dump and some MHD around .2sec.
ICRF fired into dummy load, but it is showing up on 
RF Netpower. 

EFIT is showing decreasing Wmhd during the LH again, 
although density is nearly flat and Te is increasing
a little (from TS). I need to see about tweaking the 
EFIT again. This shot is showing error in betap for almost
the whole shot, even before the LH, so it may be hopeless. 

Next: Raise Pg4 by another 2ms





Jun 19 2007 10:33:56:023AM1070619005Steve Wolfe
Shot#5: increase pg4 from 23 to 25ms
plasma, still some early runaways. 
Looks like LH may have tripped out early. 

Next: Push IC_EF4U another 10A




Jun 19 2007 10:51:28:240AM1070619006Steve Wolfe
Shot#6:IC_EF4U from -1325 to -1315
plasma, still not getting rid of the early runaways!
This one has a big bite out of the current at the dump
around .15sec. 
LH still tripping. 

Next: raise pg4 one more time. 


Jun 19 2007 11:07:32:223AM1070619007Steve Wolfe
Shot#7: raise pg4 from 25 to 27ms, pushing my luck?
plasma still with runaways, still a small bite in Ip
at .19sec this time. 

LH still faulting after 1sec. 
Next: try increasing the seg1 pg3 puff,

Jun 19 2007 11:28:45:350AM1070619008Steve Wolfe
Shot#8: raise seg1 pg3 puff from 40 to 60ms. Still trying to 
get rid of runaways and fix the current rise internal disruption.

plasma, and I think the runaways are down!
However, there is an even bigger bite out of the current
with a mini-disruption at 0.17sec. Almost lost it vertically
then. 

LH stays on better this time, at lower power. 

Next: Go to 1MA, otherwise same. 

Jun 19 2007 11:37:41:997AM1070619009Steve Wolfe
Shot#9:  Go to 1MA, otherwise same. 
I was going to try moving it off the limiter earlier,
but see what this does first.

plasma disrupted at 1.7sec, still has the bad bite in current
at 0.2sec. 

Next: decrease Ip program at 0.1sec from 600ka to 520kA

Jun 19 2007 11:50:43:663AM1070619010Steve Wolfe
Shot#10: decrease Ip program at 0.1sec from 600ka to 520kA
leave rcur out longer in rampdown. decrease first positive clearin 
point from .005 to .002, start clearin ramp earlier. 
No seg 1 changes, despite the late disruption. 

Got a fizzle. should have dropped the gas, I guess, but the
current rise isn't terrible. Drop it 2ms for next shot anyway.


Jun 19 2007 12:13:41:320PM1070619011Steve Wolfe
Shot#11: pg4 from 27 to 25msec.
Carryover from #10:
decrease Ip program at 0.1sec from 600ka to 520kA
leave rcur out longer in rampdown. decrease first positive clearin 
point from .005 to .002, start clearin ramp earlier. 
New for #11:
Delay zcur drop (was at -.008 at t=0.1, discontinuous with seg1)

Cell access for attenuator change on LH again before this shot. 

Result: fizzle. Actually made it to 65ka and 25msec. CIII and Halpha
rise smoothly. 

Next: drop pg4 back to 22msec



Jun 19 2007 12:26:26:207PM1070619012Steve Wolfe
Shot#12: pg4 from 25 to 22msec. EF4 from -1315 to -1325.
Carryover from #10:
decrease Ip program at 0.1sec from 600ka to 520kA
leave rcur out longer in rampdown. decrease first positive clearin 
point from .005 to .002, start clearin ramp earlier. 
New for #11:
Delay zcur drop (was at -.008 at t=0.1, discontinuous with seg1)

Result: plasma, disrupts in rampdown again, around 1.63sec
No bite out of current, no early runaways. 

LH faulted again, runaways are saturated after 1 sec. 
Seems to gave been an error in where the attenuator got put. 

Next: Drop pg4 to 18msec, see if I can figure out why it's disrupting. 



Jun 19 2007 12:50:41:973PM1070619013Steve Wolfe
Shot#13:  Drop pg4 from 22 to 18msec, 
reduce rampin of RXU in rampdown, also slow ZXL rise in rampdown

Cell access for changing attenuator, also power room access 
to deal with noise issue in TF cabinet.

No power shot - Alternator problem 

Jun 19 2007 01:13:21:787PM1070619014Steve Wolfe
Shot#14: Delay while alternator spins back up from 1480rpm.
It apparently tripped down due to a C-Mod fault; don't know
where that came from yet. 
 
As on #13: pg4 from 22 to 18msec, 
reduce rampin of RXU in rampdown, also slow ZXL rise in rampdown

Fizzle. Maybe dropped pg4 too much? Early breakdown at 5.0msec
but CIII level is high. Hardly any gas current

Next: PG4 to 20ms

Jun 19 2007 01:30:24:537PM1070619015Steve Wolfe
Shot#15:  PG4 to from 18 to 20msec. 
Power room access to deal with continuing noise in TF#1 and 2. 
Theyt reseated the fibers and power cycled. 

Another fizzle. Looks worse. 

Next: EF4 to -1335, getting back to where it was on shot#1.


Jun 19 2007 01:46:29:737PM1070619016Steve Wolfe
Shot#16: EF4 from -1325 to -1335, getting back to where it was on shot#1.
If this doesn't work, maybe try ecdc. 

plasma full length, looks good on tv, no issues in current rise. 
No early runaways. Slight hesitation in rcur between .01 and .015sec
CIII is still high (.006) but better than it was. 
LH has some faulting, but hanging in there. 

Next: Add some ICRF



Jun 19 2007 02:08:41:517PM1070619017Steve Wolfe
Shot#17: Back down to 800kA, add ICRF
plasma, full length. 
Startup looks ok, just a hint of early runaways. 
got an icrf pulse, stays L-mode; LH steady at ~400kW

Next: repeat, add icrf from E, increase LH


Jun 19 2007 02:22:32:153PM1070619018Steve Wolfe
Shot#18: No pcs changes
Early runaways are back. 
ICRF looks good at 1.5MW, LH tripping out.

Next: Start raising pg4 again



Jun 19 2007 03:12:25:480PM1070619019Steve Wolfe
Shot#19: pg4 from 20 to 22ms
power room access for TF again; didn't find anything.

plasma. again some early runaways and a dump at .13sec
1.5MW ICRF, LH up to ~550kW, then faulting. 



Jun 19 2007 03:33:34:167PM1070619020Steve Wolfe
Shot#20: No pcs changes 
Trying for slightly lower LH power
plasma, some early runaways (again), they're getting worse. 
ICRF looks ok at 1.5MW, stays in L-mode. 
LH still tripping. 

Next: Raise seg1 pg3, see if that will help control the runaways. 

Jun 19 2007 03:50:07:727PM1070619021Steve Wolfe
Shot#21:  Raise seg1 pg3 from 60 to 80, see if that will help control the runaways. LH is going to try to adjust phasing on one channel to improve
reflections

plasma, early runaways still present, but no obvious dump. 
BP09_jk gave a 12mT baseline offset this time. 

Hardly any hards late in pulse, must not have gotten LH? 
ICRF looks fine at 1.5MW

Next: No PCS changes

Jun 19 2007 04:05:33:660PM1070619022Steve Wolfe
Shot#22:  No PCS changes, LH will adjust phase the other way. 
plasma, still some early runaways.
LH still faulting. 

Next: try again

Jun 19 2007 04:15:22:200PM1070619023Steve Wolfe
Shot#23:  No PCS changes, LH will tinker with power from one klystron 
plasma, still with early runaways. Ip/Bz is getting big, but the
runaway level is actually a little lower this time. 

LH ran through this time.

Next: Increase ICRF power

Jun 19 2007 04:31:50:650PM1070619024Steve Wolfe
Shot#24:  No PCS changes, Increase ICRF power
plasma, runaways a little better, marginal H-mode or dithering,
but nl04 stays below 5.5e19. ICRF just under 2MW
LH stays on, but no appreciable loop voltage drop.

Next: Try dropping density earlier in pulse. 


Jun 19 2007 04:45:14:690PM1070619025Steve Wolfe
Shot#25: Get rid of initial higher nl04 and turn off PG3 in seg2
plasma
LH stayed on, density still rises during RF pulse. 
There's still gas coming in until 0.7sec. 

Next: try for even lower density 


Jun 19 2007 05:07:31:440PM1070619026Steve Wolfe
Shot#26: Program for 2e19 and flat through pulse. 
plasma to 1 sec, then disruption. 
Density went down to 1.7e19. Runaways started at 0.4sec
well before the LH or ICRF.  This was just a slideaway shot. 
Locked mode at 0.5sec, with nebar around 3e19/m^3. 
Very clear on sawteeth and LM loops.
This seems to be as low in density as we can get.

END OF RUN. 


Engineering Operator Comments
ShotTimeTypeStatusComment
109:08:08:070AMPlasmaOk
209:25:51:223AMPlasmaOk
309:43:53:330AMPlasmaOk
410:12:12:007AMPlasmaOk
510:27:18:300AMPlasmaOk
610:45:04:813AMPlasmaOk
711:02:03:720AMPlasmaOk
811:18:52:387AMPlasmaOk
911:33:02:023AMPlasmaOk
1011:46:43:003AMPlasmaOk
1112:08:49:723PMPlasmaOk
1212:21:17:607PMPlasmaOk
1312:48:50:020PMPlasmaOkAlternator Fault
1401:06:30:877PMPlasmaOk
1501:25:21:937PMPlasmaOk
1601:38:11:527PMPlasmaOk
1701:58:33:993PMPlasmaOk
1802:16:57:120PMPlasmaOk
1903:04:40:980PMPlasmaOk
2003:28:00:130PMPlasmaOk
2103:41:43:127PMPlasmaOk
2203:55:40:543PMPlasmaOk
2304:10:33:540PMPlasmaOk
2404:25:19:177PMPlasmaOk
2504:38:33:373PMPlasmaOk
2604:54:29:963PMPlasmaOk

System Availability
Jun 19 2007 09:07:43:410AM
SystemAvailableCommentAvailability
Changed
OwnerDescriptionWho Can
Change
Active MHDyesFully operationalMar 28 2007 09:19PM (sears)Joe SnipesActive MHD Antennasears,snipes
BESyesvertical 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 BravenecBeam Emission Spectroscopybravenec
Bolometersyes2Pi 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 ReinkeBolometershutch,mlreinke
BoronizationyesFirst Boronization 5/9/07May 10 2007 04:55PM (irby)Jim IrbyBoronizationdekow,irby
CNPAno Jan 14 2007 02:06PM Ron ParkerCompact Neutral Analyzerparker
Cryopump - Upper DivertoryesThe 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 LaBombardUpper Divertor Cryopumpirby,labombard
CXRSyesThe 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.May 01 2007 12:31PM (bespam)Bill RowanCharge Exchange Spectroscopybespam,blip,rachmcd,rowan
D Alphayes\ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are availableMar 11 2007 10:28PM (terry)Jim TerryBalmer Alpha Monitorirby,terry,wolfe
Dalsayescamera is re-installed, and view has been calibratedFeb 26 2007 03:28PM (marmar)Earl MarmarVisible Bremsstrahlungmarmar
Disruption Mitigationno Jan 14 2007 02:02PM Bob GranetzGas Jetgranetz,whyte
Divertor IRno Mar 06 2007 10:50AM Glen WurdenDivertor IR Digital Videogwurden,terry
Divertor IR Spectroscopyno Mar 06 2007 10:51AM Glen WurdenDivertor IR Spectroscopygwurden,ldorf,terry
DNByesAll systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shotsMar 28 2007 09:36AM (beals)Bob GranetzDiagnostic Beambeals,granetz
FRC-ECEnoOnly high frequency channel now working (16 out of 32). LO looks good. Most likely it is the 5V supply for mixer bais and amp.Jun 19 2007 07:45AM (phillips)Perry PhillipsHeterodyne ECE-32 channelsphillips
G-Side RatiomaticyesThe gauge is operational.Mar 30 2007 10:54AM (labombard)Brian LaBombardG-side ratiomatic ionization gaugelabombard,toland
GPCyesChs 1-8 operational. May 24 2007 08:40AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPC2yesMost channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard)Amanda HubbardECE Polychromaterhubbard,schmidt
GPIyesNew 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 TerryGas Puff Imagingterry,zweben
H/Dyesspectral calibration needs to be checked, but system should be ready for the runFeb 26 2007 03:28PM (marmar)Earl MarmarH/D Ratiomarmar
Hirex Jryes Mar 06 2007 08:59AM (rice)John RiceHigh Resolution X-Rayince,rice
Hirex SryesStoring Data, but profiles not yet availableApr 27 2007 01:20PM (ince)John RiceHigh Resolution X-Rayince,rice
HXRyesSomething might be wrong with channel 26; all others working fine.Mar 23 2007 10:43AM (schmidt)Ron ParkerHard X-Ray Arrayparker,schmidt
ICRF D-Antennayes80.5 MHz. readyMar 28 2007 08:50AM (ylin)Steve WukitchD-port antennawukitch,ylin
ICRF E-Antennano80 MHz. FFT installation/coaxial line needs more workMar 16 2007 09:32AM (ylin)Steve WukitchE-port antennawukitch,ylin
ICRF J-Antennayes78 MHzApr 04 2007 08:56AM (ylin)Steve WukitchJ-port antennawukitch,ylin
Lower Hybridno6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry)Ron ParkerLower Hybriddterry,parker
LPIyes Apr 26 2007 08:35PM (bose)Earl MarmarLithium Pellet Injectorbose,marmar
Ly-alphayesMidplane 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 ReinkeLyman alpha cameraslabombard,mlreinke
McPhersonyesWorking normally.Apr 19 2007 09:52AM (mlreinke)Jim TerryVUV Spectrometermlreinke,terry
MichelsonyesOperational. Mar 28 2007 08:33AM (hubbard)Amanda HubbardECE Te Profileshubbard,schmidt
MKSyesE-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 LaBombardBaratron pressure gaugeslabombard
MLPnoInitial 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 LaBombardMirror Langmuir Probe Electronics Systemlabombard
MSEno(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 ScottMotional Stark Effectjinseok,sscott
NeutronsyesBoth neutron systems are fully operationalApr 05 2007 11:19AM (fiore)Catherine FioreNeutron Detectorsfiore
Neuts and HardsyesoperationalMar 21 2007 04:29PM (irby)Jim IrbyX-Ray/Neutron Detector at K-Horirby
NINJAyesAll capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter).Mar 29 2007 11:47AM (terry)Brian LaBombardNINJA gas pufflabombard,terry
PCIyesThe system is to be optimized.May 30 2007 01:12PM (lianglin)Miklos PorkolabPhase Contrast Imagingedlund,lianglin,ntsujii,porkolab
Penning Gaugesyes8 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 LaBombardPenning Ionization Gaugeslabombard
Plasma TVyesWIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational.Mar 27 2007 01:53PM (terry)Jim TerryVideo of plasma via several camerasdekow,irby,terry,wolfe
PolarimeternoRetro shutter closedMar 15 2007 11:00AM (irby)Jim IrbyC-Mod Polarimeterirby
Probe Array - ISDyesProbes 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 LabombardInner Lower Divertor Probe Arraylabombard
Probe Array - LHyesAll 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard)Brian LaBombardLower Hybrid Probe Arraylabombard
Probe Array - OSDyesProbes 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 LaBombardOuter Lower Divertor Probe Arraylabombard
Probe Array - UDIVyes14 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 LaBombardUpper Divertor Probe Arraylabombard
ReflectometernoSystem temporarily unavailable since 1070616001Jun 19 2007 08:20AM (dominguez)Earl MarmarReflectometerdominguez,marmar
Scanning Probe - ASPyesPerpendicular Mach probe head is installed. The drive is operational.Mar 15 2007 09:09PM (labombard)Brian LaBombardA-Port Scanning Probelabombard
Scanning Probe - FSPyesPerpendicular Mach probe head is installed. The probe drive is now operational.Mar 13 2007 09:51PM (labombard)Brian LaBombardF-Port Scanning Probelabombard
Scanning Probe - WASPyesA-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 LaBombardInner Wall Scanning Probelabombard,nsmick
TCIyesNL_04 at 71.04 cm from 3/9/07 calibrationMay 23 2007 07:38AM (irby)Jim IrbyTwo-Color Interferometerirby,murray
TS - Coreyes2 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 HughesCore Thomson scatteringjwhughes
TS - Edgeyes2 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 HughesMillimeter resolution edge Thomson scatteringjwhughes
Vispecyes350 and 670 nm, 4 spatial channelsMay 04 2007 01:02PM (agraf)Alex GrafVisible Spectrometeragraf