Alcator C-Mod Run 1120920 Information

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Miniproposals
Miniproposal:694
Date Filed: 5/17/2012
Title:Transport of helium impurity in L-mode, H-mode, and I-mode.
First Author:Ken Liao
Session Leader:Ken Liao (shots 17-31)
Miniproposal:707
Date Filed: 6/21/2012
Title:Pedestal and heatflux-width scaling studies in I-mode plasmas
First Author:John Walk
Session Leader:John Walk (shots 1-16)

Operators
Session leader(s):John Walk,Ken Liao
Physics operator(s):Syunichi Shiraiwa
Engineering operator(s):Bill Parkin,Bill Byford,Thomas Toland

Engineering Operator Run Comment
MP707 - Pedestal and SOL heat-flux width scaling studies in I-mode plasm

Session Leader Plans
Entered: Sep 18 2012 03:53:44:477PM
Author: Ken Liao
MP 694 Transport of helium impurity in L-mode, H-mode, and I-mode

Required systems: DNB, Thomson, ICRF, cryopump, reflectometer

This is a continuation of MP 694 from run 1120822. During that run, we weren't able to obtain steady I-mode due to uncontrollable density rise during ICRF and a lengthy boronization recovery, so we are trying again without boronization, using a configuration for steady I-modes with nebar ~1.2*10^20 taken from Hubbard's run 1120829. Also, we'll take some ohmic shots for comparison to the previous data.

Fill H-bottom with 10 psi He4 Hybrid ENABLED (PG5)

Shot plan:
Run is at 5.8T

1. Load shot 1120907026, nl04 0.8. But use constant 2.4MW ICRF power from 0.6s - 1.4s.
Puff 30ms He4 at 0.9s.
DNB timing: 60/20, starting at 0.500 seconds, 14 beam pulses, at 46.5 keV, highest safe current.

Once we get a good I-mode shot, repeat 4 times for statistics, using different beam start times.

2. Switch back to I-mode, change ICRF power.
a. ICRF to 3.5MW power from 0.6s - 1.4s.
b. ICRF to 3.0MW power from 0.6s - 1.4s.
c. ICRF to 2.0MW power from 0.6s - 1.4s.
d. ICRF to 1.0MW power from 0.6s - 1.4s. (expect out of I-mode)

3. Switch to ohmic shots. Same plasma shape. nl04 0.8. Take 4 shots with beam.

4. If time allows, then switch main fuel plenum to He4 and run a helium main ion plasma.
Entered: Sep 19 2012 06:21:32:100PM
Author: John Walk
SL Plan for run 1120920 (morning)
MP707 - Pedestal and SOL heat-flux width scaling studies in I-mode plasmas

This half-day will continue the runs from 1120824 and 1120828, studying pedestal structure and scaling, along with SOL heat flux measurements, across a scan in plasma current, density, and RF heating power. Today's shots may also extend down into low-field operation.

Required diagnostics:
core and edge Thomson Scattering
ECE, tuned for 5.8T
O-mode reflectometer, using CECE fast digitization
CECE, tuned for pedestal top
divertor thermocouples and IR thermography
HiReX SR, high-Te configuration. 20ms timing.
He puffing for GPI
CXRS, set up for He and D2 puffing

Engineering setup:
toroidal field: 5.8T, reversed field.
plasma current: 600-1300kA (reversed)
working gas: D2
ICRF: 3-5MW, 80MHz
Gas puffing: D2 fueling
D2 or He for CXRS, He for GPI - 10PSI C-port He, 7PSI F-port D2
Ar for HiReX
Ne seeding available

cryo OFF
DNB OFF

Shot Plan:

The goal for the last half-day of the MP is twofold: to cover the low current/low density range that was not accessible previously in the run, and to fill in GPI data missing across the entire range of the parameter scan.

Phase (1): we will start with recovery from the preceding night's boronization. Load shot 1120907035, plan 3-5MW ICRF stairstep in 500kW steps from 0.5 to 1.5s - while the ultimate target is lower density, we will run higher density to recover density control. If density control is not established, program intentional VDE. 5 shots.

When controlled high density, high current is established, run steady shot at 4 and 5MW with GPI.

Phase (2): low current, low density. We will reduce the current and density to 1000kA and f_Gr = 0.2 (nl04 = 0.77), then down to 850kA, f_Gr = 0.2 (nl04 = 0.66). These shots will be at lower RF power (2.5-3.5MW) to avoid excessive heating of limiters and antennas. If necessary, lower the field to 4.8T to move ICRF resonance to the high-field side. Adjust density as needed to access I-mode and prevent wall heating. When steady I-modes are attained, repeat with flat-top RF and GPI. 10 shots.

Phase (3): low field. If time permits, we may attempt low-field (2.5-3T) I-modes. Ip = 650kA, 2nd harmonic heating. This is a largely unexplored regime, and will be interesting for stability analysis with high beta.
Entered: Sep 21 2012 09:57:26:500AM
Author: Mike Churchill
edge CXRS
HFS periscope Views 19-27 hooked up to the slow diodes with Dbeta filters.
Puffing D2 at 1.55s.

Physics Operators Plans
Entered: Sep 20 2012 08:51:37:043AM
Author: Syunichi Shiraiwa
MP707 - Pedestal and SOL heat-flux width scaling studies in I-mode plasmas
MP 694 Transport of helium impurity in L-mode, H-mode, and I-mode

-----------------
Engineering Setup
-----------------

Run begins at 09:00 and ends at 17:00

Power systems as on: 1120907035

Acoil: -Dtop +Dbot +Jtop -Jbot; Hybrid enabled (reversed field)

Gas setup:

Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1.5 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 H-bottom with 10 psi He4 Hybrid DISABLED (PG5)
leave B-div as is Hybrid DISABLED (PG6)
leave H-div as is Hybrid DISABLED (PG7)
fill NINJA F-port with 7 psi D2 enabled
fill NINJA C-port with 10 psi He enabled

Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS
Leave z-bolo shutter as is (should be open)

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): yes
Overnight ECDC (yes/no): no -> 6hrs He ECDC was done.
ICRF(yes/no): yes
LH(yes/no): no
Cryopump (yes/no): yes (disabled for morning session)
DNB (yes/no): yes (disabled for morning session)

Vessel temperature: 35/35/35

------------------------------
ECDC Parameters (if requested)
------------------------------
gas and pressure: D2 at 2e-4 Torr
sweep: 44/45/103 cm
scan: 20/120 s

------------------------------
LMC (if requested)
------------------------------
pure Ar on B-SIDE-LOWER: 1120917011

Session Leader Summaries
Entered: Sep 20 2012 05:55:34:723PM
Author: Ken Liao
SL summary for run 1120920, shots 17-31 for MP694.

For reasons that I don't understand, we needed about 4MW ICRF for sustained I-mode. This put some constraint on the ICRF duration to keep a reasonable heat load.

We got several shots with sustained I-mode, and two shots with I-mode and beam performing adequately.

Unfortunately, beam performed very unreliably during the run, and cost us a lot of time. Also, beam ran at reduced parameters, so the signal level was not so good. Nevertheless, we do have data for a couple of I-mode shots, and a couple ohmic shots for comparison.

The H-bottom plenum was acting finicky during the start of the run (shots 17-20), putting out much less helium than it was supposed to. The problem was present on Monday, and is intermittent. We checked if the piezo was freezing, but that turned out to not be the case. Doing a single shot (shot 21) with 100ms puff seemed to have cleared it up, and following shots at 50ms puff had no problem.

The helium recycling appears to be quite a bit lower with ICRF on than in an ohmic plasma. In I-mode shots, the time constant for disappearance of edge He is approximately 0.2s, and it is approximately 3s in ohmic plasma.
Entered: Sep 20 2012 06:35:22:167PM
Author: John Walk
Run summary, 1120920 (morning)

MP707 - pedestal and heat-flux width scaling studies in I-mode plasmas

16 shots:
3 fizzles
1 early disruption
2 VDE (1 intentional)
5 L-mode
5 I-mode plasmas

Given the lack of recent boronization, we boronized last night. This necessitated using the first shots of the morning for boronization recovery (planned for 5 shots). 001 and 003 were high-density I-mode attempts, with 002 fizzling. RF faults on 001 prevented I-mode access, although conditioning improved on 003. 004-005 were planned VDE shots to get more outgassing from the walls - 004 fizzled, 005 disrupted as planned. Afte this, we targeted f_Gr = 0.2 1MA plasmas to start moving down into the low density/current phase of the experiment; however, 006 fizzled and 007 disrupted, as evidently the VDE coil programming was still on for these shots.

We then moved into the plasma phase, continuing attempts at 1MA, nl04 = 0.77 plasmas. 008-010 did not reach I-mode, although RF conditioning substantially improved; I suspect the fairly heavy Ne seeding kept Prad high, bleeding off too much heat to get the edge temperature up.

From 011 on we had smooth operation, apart from one early disruption due to a Moly(?) injection. 011 and 012 were at 5.8T, 1MA with 4MW ICRF, both reaching I-mode before the 4MW step-up in heating; this was encouraging, as we had been unable to reach I-mode at this current with 3MW in previous run days on this MP. 012 had He puffing for GPI, but the outer gap was too large for good pedestal data, and the long RF pulse was causing some heat loading on the limiter and shoelace antenna. We reduced the RF pulse to 3.5MW and shortened it to compensate for reducing the outer gap, and got good GPI data in addition to a decently hot I-mode pedestal (though I did not see a clear WCM on the reflectometer).

For 014-016, we reduced Ip to 800kA and nl04 to 0.66 (keeping f_Gr ~ 0.2) and shortened the RF step further; this, along with reducing Bt to 4.8T to shift the RF resonance to the HFS, was fairly successful in mitigating the heat loading we were seeing on the GH limiter and shoelace antenna. Got I-modes at 800kA, which we had been unable to do on 1120824 or 1120828. With GPI data on 016, we finally got some pedestal coverage at the low-current point.

Overall, this MP's runtime has gotten good coverage across 3-5MW RF power, current from 800-1300kA, and at low and mid densities at multiple field points in I-modes.

Physics Operator Summaries
Entered: Sep 20 2012 05:21:50:680PM
Author: Syunichi Shiraiwa

Session Leader Comments
Sep 20 2012 10:14:30:233AM1120920001John Walkshot 001

attempt: we'll start off with boronization recovery. Optimistically, we'll start by trying high density I-modes, loading 1120907035 from Amanda's run. 1.1MA, 5.8T, 4-5MW ICRF.

result: high-density L-mode. Looks like J-port ICRF didn't go, so not enough power to get into I-mode. nl04 around 1.5, core density around 2.5.

next: repeat, try to get J-port conditioned.
Sep 20 2012 10:13:50:590AM1120920002John Walkattempt: repeat, try to get ICRF conditioned.

result: fizzle.

next: one more try.
Sep 20 2012 10:13:24:960AM1120920003John Walkattempt: one more try at high density.

result: another high-density L-mode. J-antenna is doing better, still pretty trippy. nl04 ~1.5, ne(core) ~2.5.

next: push a little harder to recover from the boronization. Had good luck with that in Amanda's run with an intentional VDE. Load 1120907004.
Sep 20 2012 10:12:57:403AM1120920004John Walkattempt: intentional VDE for boronization recovery.

result: fizzle.

next: repeat.
Sep 20 2012 10:12:31:153AM1120920005John Walkattempt: intentional VDE for boronization recovery.

result: nl04 to 1.5, disrupts at 1.2s as programmed.

next: get started on lower current/density phase. Bring the current down to 1000kA, target nl04 = 0.77.
Sep 20 2012 10:07:11:173AM1120920006John Walkshot 006 - begin lower current/density phase of run. We'll start bringing the current/density down gradually for easier access.

attempt: 1000kA, nl04 = 0.77 (f_Gr = 0.2). Same shaping. ICRF: 3MW starting at 0.5s, step up to 4MW at 1.0s to 1.5s, 1MW into rampdown. We'll target the density lower than 0.77 to account for outgassing from the walls.

result: fizzle.

next: repeat.
Sep 20 2012 10:23:26:323AM1120920007John Walkattempt: repeat 1000kA, nl04 = 0.77

result: result: plasma, disrupts at 1.3s. nl04 reaches 1.0 before disruption. The programming from the VDE shots was still loaded? On the bright side, RF looks good.

next: load coil settings from shot 003 and repeat.
Sep 20 2012 10:48:28:350AM1120920008John Walkattempt: repeat, corrected coil programming.

result: plasma into rampdown, RF looks great. nl04 reaches 1.2. Doesn't look like it gets into I-mode. Large dip in density just before RF, approaching locked-mode territory.

next: same target current and density. Delay RF pulse to 0.7s to let the density get back under control. Looks like we're getting heating on the limiter, probably in the early low-density part, so delaying the RF pulse will help that as well.
Sep 20 2012 10:58:28:857AM1120920009John Walkattempt: 1000kA, 3-4MW ICRF, nl04 = 0.77. Delayed RF pulse to cut down on limiter heating, get density under control.

result: plasma to rampdown, RF looks good. nl04 = 1.0. Extra fueling, either from RF or from NINJA. Looks to be cooling the edge, preventing I-mode access.

next: repeat. disable NINJA, try to reduce fueling to get into I-mode.
Sep 20 2012 11:14:21:497AM1120920010John Walkattempt: 1000kA, 3-4MW ICRF. Disable NINJA.

result: plasma to rampdown. nl04 ~ 0.8-0.9, more under control. Prad is high.

next: repeat, reduce Ne puff by half to lower Prad.
Sep 20 2012 11:41:19:440AM1120920011John Walkattempt: repeat with half the Ne seeding, try to reduce Prad.

result: success! I-mode 1.1-1.3s. Prad comes up at 1.3, not sure why.

next: repeat with He puff for GPI at 1.1s. Reduce outer gap to 1cm at J. Terry's request.
Sep 20 2012 11:56:49:873AM1120920012John Walkattempt: repeat with GPI. reduce outer gap.

result: I-mode at 0.85s (3MW, which we hadn't gotten before at this current). Stays in after 1.1, but is cooling, not steady. RF trips. outer gap too large for GPI, but we're heating up the limiter badly.

next: shorten RF pulse to 0.8-1.2s, lower max power to 3.5MW. Keep target density and current. GPI starting at 1.0s.
Sep 20 2012 12:25:50:040PM1120920013John Walkattempt: reduce outer gap to 1.3cm. Reduce RF pulse to 0.8-1.2s, 3-3.5MW to counteract heating. Flatten density at 0.77. GPI 1.0-1.2s.

result: cooler I-mode 0.9-1.2s in RF flattop, density and edge temperature steady. Got GPI data.

next: reduce current to 800kA, nl04 to 0.66. Reduce field to 4.8T to put heating on HFS. Keep RF programming.
Sep 20 2012 12:39:59:167PM1120920014John Walkattempt: reduce Ip to 800kA, nl04 to 0.66, Bt to 4.8T to put heating on HFS, try to protect limiters and shoelace antenna.

result: runs, weak I-mode 1.0-1.2s. No WCM, but clear turbulence suppression on 88l. Still a good result for this current.

next: repeat with GPI. shift RF stepup for 3.5MW to 0.9s. He puff at 1.0, run GPI 1.0-1.2s.
Sep 20 2012 12:48:46:073PM1120920015John Walkattempt: repeat with GPI.

result: disrupts before RF.

next: repeat.
Sep 20 2012 01:06:16:277PM1120920016John Walkattempt: repeat with GPI and CXRS

result: plasma into rampdown, I-mode 0.9-1.2. Injection from GH limiter at 0.5s.

next: hand off to Ken
Sep 20 2012 01:29:41:113PM1120920017Ken LiaoFirst shot for my run.
Try to obtain shot similar to 1120907026 which had a nice I-mode which was accessed with 2MW ICRF power.

For this shot, try 2.4MW power on this shot.

Results:
No I-mode, density too high. nl04 ~ 0.98
Beam had many faults.

Next shot:
Try to decrease the density to 0.8
decrease He4 puff to 25ms.
Try ICRF ramp from 2.4-3.0MW to find the I-mode
Sep 20 2012 01:39:03:167PM1120920018Ken LiaoNo I-mode. Density still high.
Beam is faulting.

Next shot:
Increase ICRF to 3.5MW
Decrease the density request.
Increase helium puff back to 30ms.
Sep 20 2012 02:03:35:133PM1120920019Ken LiaoDisruption at 0.7s.

Next shot. Try to use shot similar to shot 11 from today. Ask for 3.8MW on ICRF from 0.75 to 1.3s.
Sep 20 2012 02:35:16:210PM1120920020Ken LiaoI think we got an I-mode at .8-1.3, but Amanda says it is weird. Edge temperature is low for part of that.
Don't see any increase in He4 at 0.9s. I don't think it really puffed. The piezo might be frozen.
Density really low, nl04~0.52
Lots of radiated power, maybe need to increase density setpoint and also increase Neon puffing.

Tommy checking if pg5 is frozen.
Result: piezo is not frozen. There were no obvious problems.

Next shot:
increase neon puff to 150ms. increase density, want to get nl04 0.7
increase outer gap to avoid burning shoelace antenna.
Change helium 4 puff to 100ms.
Sep 20 2012 02:46:15:940PM1120920021Ken LiaoI-mode from 0.9-1.0, drops out of I-mode, then back into I-mode 1.2-1.3
Beam is performing poorly.
I can't really see clear beam enhancement.

Next shot. Go to 4MW ICRF. Reduce He puff to 50ms.
Sep 20 2012 03:04:53:737PM1120920023Ken LiaoDisrupted at 0.51 s

Repeat shot
Increase beam arc current to 3.3
Sep 20 2012 03:24:20:683PM1120920024Ken LiaoI-mode from 1.0-1.3.
Beam faulted over time span when helium was in plasma.

Repeat shot
Move start of ICRF pulse to 0.7s.
Decrease beam arc current to 3.0
Sep 20 2012 03:48:20:950PM1120920025Ken LiaoGood shot. Beam is adequate.

Repeat shot
Move beam start time to 0.53s.
Sep 20 2012 03:58:58:793PM1120920026Ken LiaoI-mode from about 0.9-1.3. Beam almost good, but the one pulse that happens to follow the helium puff is weak.

Repeat shot
Move beam start time to 0.51s.
Sep 20 2012 04:17:48:410PM1120920027Ken LiaoBeam faulted during interval surrounding puff. Also, I-mode didn't start until 1.15s or so.

Next shot:
Turn off the RF. This will be an ohmic plasma, with similar shape to the I-mode plasma.
Sep 20 2012 04:26:37:253PM1120920027Ken LiaoOhmic shot. Beam performed poorly. Density nl04~0.67 before puff, 0.77 after.

Next shot:
move beam start time to 0.49.
Sep 20 2012 04:43:48:070PM1120920029Ken LiaoBeam digitizer failed. Also, beam faulted many times during shot.

Repeat shot. Hope for better beam.
Sep 20 2012 04:54:45:160PM1120920030Ken Liaomediocre beam.

next shot.
move beam start time to 0.53s
Sep 20 2012 05:12:58:880PM1120920031Ken LiaoLast shot.
Beam looked bad.
A few pulses look usable.

Anyways, that's it for the run.

Physics Operator Comments
Sep 20 2012 09:04:18:247AM1120920001Syunichi ShiraiwaChange B-SIDE-LOWER to Ne/Ar mix for both neon seeding + HiRex.

Loaded 1120907035
Changed PG1 to 50V

Result:
Got a plasma
Sep 20 2012 09:23:40:490AM1120920002Syunichi ShiraiwaRepeat for recoverty.
Fixed ratiomatic...

Result:
fizzle,, to much gas?

Next:
reduce a gas to 30ms (it is 40ms in shot2)
Sep 20 2012 09:32:15:953AM1120920003Syunichi Shiraiwagot a plasma.
breakdown pressure is about the same as 11200907035.
still Ha signal is much higher and dIp/dt is lower
than the reference shot.

Next:
put vertical displcacement based on 1120907004
Sep 20 2012 09:45:42:017AM1120920004Syunichi ShiraiwaFizzle

Next:
reduce prepuff to 25ms
Sep 20 2012 10:03:01:410AM1120920005Syunichi ShiraiwaGot a plasma.
Disrupted during the VDE.

Next
1MA, 0.77e20, no VDE, reduce prepuff to avoid PDF
Sep 20 2012 10:09:23:610AM1120920006Syunichi ShiraiwaFizzle

next: repeat
Sep 20 2012 10:21:24:430AM1120920007Syunichi ShiraiwaGot a plasma. Disrupted at 1.2

next:
remove VDE (this is operator mistake)
Sep 20 2012 10:51:53:533AM1120920008Syunichi ShiraiwaA full length plasma.

Next:
reduce puff after breakdown to reduce ne04 at 0.5 (RF start)
also adjusted PID gains...
Sep 20 2012 11:11:23:667AM1120920010Syunichi Shiraiwagot a full length plasma

next:
enable H-bottom
reduce ne to 0.1s
Sep 20 2012 11:44:17:070AM1120920012Syunichi ShiraiwaGot a plasma.
Density becomes lower.
Outer gap become 1.5-1.7cm.

Sep 20 2012 12:04:08:700PM1120920012Syunichi ShiraiwaGot a plasma.
Density becomes lower than the previous shot
Outer gap become 1.5-1.7cm.
Heating out the antettena


next:
reduce the outer gap to 1.1-.3mm
increase the density request by 0.1e20

Sep 20 2012 12:26:33:427PM1120920013Syunichi Shiraiwane is 0.7-0.8e20
outer gap is about 1.1-1.2 cm

Next:
4.8T, 800kA, 0.66e20 (0.2 of n_gw)
Sep 20 2012 12:32:40:457PM1120920014Syunichi Shiraiwane 0.66
clean RF pulse.
4.8T


Sep 20 2012 12:57:16:563PM1120920015Syunichi ShiraiwaRepeat of 14.

Disrupted at 0.6s
Sep 20 2012 12:58:08:003PM1120920015Syunichi ShiraiwaRepeat of 14.

Disrupted at 0.6s.
Mo from somewhere....
Sep 20 2012 01:03:43:520PM1120920016Syunichi ShiraiwaGot a full lenght plasma.
The last shot of morning session.


Sep 20 2012 01:27:35:610PM1120920017Syunichi ShiraiwaFirst shot for ken

load 1120907026
enable cryo pump
30ms H-bottom (he4) from 0.9s

Density is 0.9e20.

Next : adjust ne04 PID and reduce the density request.
reduce H-bottom to 25ms
Sep 20 2012 01:36:46:503PM1120920018Syunichi Shiraiwane04 ~ 0.9e20

next:
reduce ne04
set H-bottom 30ms
Sep 20 2012 01:45:47:563PM1120920019Syunichi Shiraiwadisrupted at 0.7s
Sep 20 2012 02:44:46:423PM1120920021Syunichi ShiraiwaIncreased outer gap to 2cm
increased the density request so that ne04 will be around 0.7e20

set H-bottom to 100ms to test it.

Result:
Got He into the plasma
Limter seems to be happier in this shot.

Next:
reduce the He to 50ms
Sep 20 2012 03:02:28:890PM1120920023Syunichi ShiraiwaDisraupted around 0.5s
Sep 20 2012 03:21:40:233PM1120920024Syunichi ShiraiwaGot a plasma but the beam was not good.

Next: repeat

Sep 20 2012 03:47:04:757PM1120920025Syunichi ShiraiwaBeam is good in this shot.

Next: one more repeat of this shot...?
Sep 20 2012 04:12:05:867PM1120920027Syunichi ShiraiwaBeam is not good for this shot..

Next switch to OH target.

Sep 20 2012 04:25:10:893PM1120920028Syunichi ShiraiwaGot a full lenght OH plasma.

Small bump during the break-down process.


Sep 20 2012 04:55:43:207PM1120920030Syunichi ShiraiwaGot a full lenght OH plasma.

Next: repeat
Sep 20 2012 05:10:02:807PM1120920031Syunichi ShiraiwaGot a full lenght OH plasma.
Last shot.

Beam was not good this shot.

Engineering Operator Comments
ShotTimeTypeStatusComment
108:57:43:773AMPlasmaOk
209:11:55:427AMPlasmaOk
309:25:58:997AMPlasmaOk
409:38:51:163AMPlasmaOk
509:51:20:973AMPlasmaOk
610:05:01:133AMPlasmaOk
710:17:39:003AMPlasmaOk
810:31:08:297AMPlasmaOk
910:48:25:700AMPlasmaOk
1011:03:16:970AMPlasmaOk
1111:17:33:880AMPlasmaOk
1211:36:49:673AMPlasmaOk
1312:04:18:273PMPlasmaOk
1412:26:08:463PMPlasmaOk
1512:45:24:960PMPlasmaOk
1612:59:05:210PMPlasmaOk
1701:16:50:943PMPlasmaOk
1801:29:56:300PMPlasmaOk
1901:43:09:883PMPlasmaOk
2002:02:37:353PMPlasmaOk
2102:33:49:163PMPlasmaOk
2202:46:36:690PMPlasmaOk
2303:00:00:290PMPlasmaOk
2403:13:46:997PMPlasmaOk
2503:37:25:397PMPlasmaOk
2603:52:23:537PMPlasmaOk
2704:05:38:380PMPlasmaOk
2804:20:28:370PMPlasmaOk
2904:35:30:910PMPlasmaOk
3004:49:43:240PMPlasmaOk
3105:06:53:433PMPlasmaOk

System Availability
Sep 20 2012 08:57:23:847AM
SystemAvailableCommentAvailability
Changed
OwnerDescriptionWho Can
Change
Active MHDnosecured - tagged outJun 2 2008 11:03:58:433AM (sears)Joe SnipesActive MHD Antennagolfit
BESyesBES system is onlineNov 22 2011 02:21:12:050PM (bespam)Bill RowanBeam Emission Spectroscopybespam,liao,rowan
BolometersyesMidplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibratedApr 20 2012 09:57:29:520AM (mlreinke)Matt ReinkeBolometershutch,mlreinke
Boronizationyes Jun 15 2012 05:02:46:313PM (dekow)Jim IrbyBoronizationdekow,irby
CECEyesThe system is currently operational for Te tilde measurement. Talk to Choongki about the current configuration Jul 3 2012 04:38:00:317PM (nthoward)Anne WhiteCorrelation ECEnthoward,sck83,whitea
CNPAyesMultiple channel CNPA available, no safety risk for in-vessel accessApr 14 2011 12:01:59:693PM (parker)Ron ParkerCompact Neutral Analyzerparker
Cryopump - Upper Divertoryes Jun 15 2012 05:02:31:550PM (dekow)Brian LaBombardUpper Divertor Cryopumpdekow,irby,labombard
CXRSyescore-CXRS system is onlineNov 22 2011 02:21:22:280PM (bespam)Bill RowanCharge Exchange Spectroscopybespam,blip,liao,rachmcd,rowan
CXRS edgeyesMichael CHurchill has primary responsibility at the momentApr 19 2011 11:44:46:247AM (blip)Bruce LipshultzMeasurement of CXR light in the pedestal region at both the high- and low-field sidesblip,rmchurch
D Alphayes\ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not availableJul 1 2009 09:45:41:090AM (terry)Jim TerryBalmer Alpha Monitorirby,terry,wolfe
Dalsanosystem is is installed and aligned, but not functional (appears to be a broken cable)Dec 5 2011 02:41:42:867PM (marmar)Earl MarmarVisible Bremsstrahlung Imagingmarmar
Disruption Mitigationyestwo gas jet valves active as of Feb 2012May 15 2012 10:09:23:597AM (granetz)Robert GranetzGas Jetgranetz,whyte
Divertor IRno Mar 6 2007 10:50:41:677AM Glen WurdenDivertor IR Digital Videogwurden,terry
Divertor IR Spectroscopyno Mar 6 2007 10:51:39:897AM Glen WurdenDivertor IR Spectroscopygwurden,terry
DMBolo AXUV diodesyesDiodes are taking usable data. Not all post-processing code is working yet.Feb 1 2012 01:24:23:953PM (golynyk)Geoff OlynykSet of six AXUV diodes in a toroidal array of midplane wall boxes.golynyk,granetz,mlreinke,whyte
DNByes"The beam could break at any moment."May 15 2012 10:09:52:470AM (granetz)Robert GranetzDiagnostic Neutral Beamdterry,granetz,mochung
ECDCyes Apr 26 2012 03:23:19:057PM (dekow)Jim Irby2.45 GHz, 3 kW, discharge cleaning systemdekow,irby,pfeiffer
FRC-ECEyesFRC-ECE is onlineMay 14 2012 11:53:01:693AM (bespam)Perry PhillipsHeterodyne ECE-32 channelsbespam,liao,phillips,rowan,whitea
FTCIyesSystem OperationalMay 14 2012 11:50:45:590AM (irby)Jim IrbyFast two-color interferometerirby
G-Side RatiomaticyesInstalled April 25,2012. New controller installed 5/29/2012Jun 7 2012 10:40:00:957AM (toland)Brian LaBombardG-side ratiomatic ionization gaugelabombard,toland
Glow DischargenoHV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged.Mar 5 2012 10:21:53:460AM (dekow)Jim Irby1 kV, 5 A, glow discharge systemdekow,dterry,irby
GPCyesOperationalApr 27 2012 07:41:46:907AM (hubbard)Amanda HubbardECE Polychromaterhubbard
GPC2yesOperationalApr 27 2012 07:42:03:317AM (hubbard)Amanda HubbardECE Polychromaterhubbard
GPIyesThe 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 TerryGas Puff Imagingterry,zweben
H/Dyessystem is functional and taking dataDec 5 2011 02:42:29:857PM (marmar)Earl MarmarH/D Ratiomarmar
HEATyes Apr 26 2012 03:23:49:607PM (dekow)Gary Dekow - Machine Heaters -burke,dekow
Hirex JryesHirex-Jr has been installedJun 28 2010 03:36:33:420PM (rice)John RiceHigh Resolution X-Rayince,rice
Hirex SryesInstalled 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 RiceHigh Resolution X-Raycgao,ldelgado,rice,ypodpaly
HXRyes32 Channels operational,, no safety risk for in-vessel accessApr 14 2011 12:05:24:810PM (parker)Ron ParkerHard X-Ray Arrayfaust,parker,schmidt
ICRF D-Antennayes May 31 2012 09:20:06:827AM (wukitch)Steve WukitchD-port antennawukitch,ylin
ICRF E-Antennayes May 31 2012 09:19:57:640AM (wukitch)Steve WukitchE-port antennawukitch,ylin
ICRF J-Antennayes May 31 2012 09:19:47:443AM (wukitch)Steve WukitchJ-port antennawukitch,ylin
Impurity SpectroscopyyesBeing upgraded with better optics and new spectrographs. Dan Miller has primary responsibility.Apr 19 2011 11:46:02:193AM (blip)Bruce LipshultzMeasurement of recycling light and impurity source rates at multiple surfaces around the tokamakblip,miller
Laser Blow-OffyesPumped Down, Laser has not yet been tested but otherwise operationalMay 14 2012 04:31:17:037PM (nthoward)Martin GreenwaldImpurity Injection Systemg,nthoward
Lower HybridyesLH is now available for plasma operation up to ~900 kW net power.Jul 3 2012 02:50:00:693PM (wallaceg)Ron ParkerLower Hybriddterry,parker,wallaceg
Lower Hybrid ReflectometernooffApr 15 2011 08:24:27:930AM (dominguez)Arturo DominguezLower Hybrid Reflectometerdominguez,marmar,parker,sgbaek
LoWEUSyesLoWEUS 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 Spectrometermarkchil,mlreinke
LPInoBeam line removedMay 30 2008 02:09:12:833PM (bose)Earl MarmarLithium Pellet Injectorbose,marmar
Ly-alphanoMidplane Lyman-a not functioning. New B-PORT Lyman (BPLY) still being debugged.Jul 12 2012 08:52:28:233AM (mlreinke)Matt ReinkeLyman alpha camerasfaustian,labombard,mlreinke
Magneticsyes Dec 1 2011 11:51:51:970AM (g)Robert GranetzBp coils and flux loops for equilibrium controlgranetz,wolfe
McPhersonnoMcPherson under vacuum but is not run on a day-to-day basis. Can be requested if desired. LoWEUS has taken over as the primary Mo monitor.Jul 12 2012 08:53:14:937AM (mlreinke)Jim TerryVUV Spectrometermarkchil,mlreinke,terry
MichelsonyesVacuum 3-4e-8 T. Starting with Michelson at reduced speed.Apr 27 2012 07:42:41:960AM (hubbard)Amanda HubbardECE Te Profileshubbard,schmidt
MKSyes Dec 2 2011 12:27:47:163PM (toland)Brian LaBombardBaratron pressure gaugeslabombard,toland
MLPyesOperational. Connected to A-port probe systemMay 10 2012 08:40:19:910AM (labombard)Brian LaBombardMirror Langmuir Probe Electronics Systemlabombard
MSEyes2/29/2012 MSE operational. No HV or vacuum safety issuesFeb 29 2012 12:26:13:863PM (sscott)Steve ScottMotional Stark Effectjinseok,sscott
NeutronsyesVoltage 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 FioreNeutron Detectorsfiore
Neuts and HardsyesAll detectors Powered On --- Waiting for neutrons for calibrationNov 22 2011 01:05:24:380PM (irby)Jim IrbyX-Ray/Neutron Detectors at K-Horirby
NINJAyesC-bottom and new F-bottom system ready.Dec 2 2011 12:28:44:843PM (toland)Brian LaBombardNINJA gas pufflabombard,terry,toland
PCIyesOperational.Jul 10 2012 07:08:06:883PM (ntsujii)Miklos PorkolabPhase Contrast Imagingemd,ennever,ntsujii,porkolab
Penning GaugesyesHV power supplies turned ON in INIT, off in RECOOLMay 10 2012 08:41:03:000AM (labombard)Brian LaBombardPenning Ionization Gaugeslabombard
Plasma TVyesWIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational.Jul 1 2009 09:46:29:543AM (terry)Jim TerryVideo of plasma via several camerasdekow,irby,terry,wolfe
Polarimeteryes3 chords operational but with high noise levelJan 6 2012 04:22:20:903PM (irby)Jim IrbyC-Mod Polarimeterirby
Power - Alternator Air Switchyes Apr 26 2012 03:24:21:607PM (dekow)Gary DekowAlternator to Power Room Power Supply Connectioncochran,dekow,dterry,irby
Power - PEIyes Apr 26 2012 03:24:41:250PM (dekow)Gary DekowPEI Systemcochran,dekow,dterry,irby
Power - TMXyes Apr 26 2012 03:24:57:153PM (dekow)Gary DekowEf2s,. EFCs and A-Coilsbyford,cochran,dekow,dterry,irby
Power Systemsyes Apr 26 2012 03:25:14:497PM (dekow)Jim IrbyC-Mod Magnet Suppliesbyford,cochran,dekow,dterry,irby
Probe Array - ISDyesOperational. Some dead probes.May 10 2012 08:41:58:120AM (labombard)Brian LabombardInner Lower Divertor Probe Arraylabombard
Probe Array - LHyesOperational. 4 out of 6 probes working.May 10 2012 08:41:40:557AM (labombard)Brian LaBombardLower Hybrid Probe Arraylabombard
Probe Array - OSDyesOperational.May 10 2012 08:42:13:733AM (labombard)Brian LaBombardOuter Lower Divertor Probe Array (F and J)labombard
Probe Array - UDIVyesOperational. Some dead probes.May 10 2012 08:42:32:663AM (labombard)Brian LaBombardUpper Divertor Probe Arraylabombard
ReflectometeryesOn 1120608, the high frequency channels: 112, 140 and the variable, have been disconnected for some troubleshooting. All other channels are connectedJun 14 2012 11:28:59:603AM (dominguez)Earl MarmarReflectometerdominguez,marmar
Scanning Probe - ASPyesOperational. A variety of probe heads are ready for use.May 10 2012 08:43:10:937AM (labombard)Brian LaBombardA-Port Scanning Probelabombard
Scanning Probe - FSPyesOperational.May 10 2012 08:43:24:887AM (labombard)Brian LaBombardF-Port Scanning Probelabombard
Scanning Probe - WASPnoNot functioning. Probe tips are melted. Repair not performed during break.May 10 2012 08:44:43:137AM (labombard)Brian LaBombardInner Wall Scanning Probelabombard,nsmick
Shoelace AntennayesOperationalMay 10 2012 08:45:08:320AM (labombard)Brian LaBombardHigh-k active MHD antenna, for QCM, WCM studiesgolfit,labombard
SOL reflectometeryesc-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each dischargeMay 1 2012 04:54:58:820PM (cornwall)Cornwall LauSOL reflectometercornwall,wukitch,ylin
SparkeryesSparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AMApr 23 2012 12:06:10:983PM (parkin)Jim IrbyField Emission Preionization for C-Moddekow,irby,parkin
Surface Science StationyesSSS is under vacuum and fully available.Jul 3 2012 02:46:59:753PM (ochoukov)Bruce LipschultzRadially scanning probe located on K-portblip,ochoukov
TCIyesTCI lasers in operation May 14 2012 11:51:18:700AM (irby)Jim IrbyTwo-Color Interferometerirby,murray
TS - CoreyesOperating with both lasers, density calibration ongoing.Jul 19 2012 10:20:09:220AM (jrwalk)Jerry HughesCore Thomson scatteringjrwalk,jwhughes,yma
TS - EdgeyesOperating with both lasers, density calibration ongoing.Jul 19 2012 10:20:28:323AM (jrwalk)Jerry HughesMillimeter resolution edge Thomson scatteringjrwalk,jwhughes,yma
Vispecno350 and 670 nm, 4 spatial channelsNov 28 2007 09:58:35:493AM (agraf)Alex GrafVisible Spectrometeragraf
XEUSyesXEUS 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 ReinkeX-ray Extended Ultraviolet Spectrometermarkchil,mlreinke
XTOMOyesARRAY1->5 available. Specific channels on various arrays display issues.Apr 20 2012 05:36:28:523PM (faustian)Robert GranetzX-Ray Tomographyfaustian,granetz,mlreinke