| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Mark May |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Vinny Bertolino,Joe Daigle |
| Engineering Operator Run Comment |
| Grenetz/Spectroscopy |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:13:583PM |
| Author: To Be Determined |
| Run:950428 SL: May PO: Granetz EO: Bertolinni/Daigle ----------------------- MP 111: Investigations of an Edge Electron Density Diagnostic Using Line Ratios of Ni-like and Co-like Transtions in Pd, Mo, and Nb. The purpose of this MP was to explore a spectroscopic edge/divertor electron density diagnostic for C-Mod and future tokamaks such as ITER. The Ni- and Co-like charge states of Pd, Mo, and Nb exist near the edge of the plasma. The ratio of electric quadupole transitions (E2)to the electric dipole transitions (E1) in these ions have a strong density dependence in the n_e ~ 1E20 - 1E21 m-3 range. The series of reproducible shots into which we injected these impurities had a density ramp with nl04 going from 0.5 to 1.4E20. The density ramp started between 0.57-0.66 sec. Trace amounts of Mo (shots 2-12,30), Nb (shots 13-24), and Pd (shots 31-32) were injected using the impurity injector at either 0.6s (Low density nl04~0.5E20 m-3) and at 0.95 sec (High density nl04~1.5E20). The line ratios were measured successfully using the Molybdenum Monitor. The amount of the injected impurity was monitored using the 2pi bolo and the McPherson spectrograph. HIREX observed lines from Mg-, Na-, Ne-, and F-like Nb, as well as lines from Ne-like Pd. The McPherson measured Mg- and Na-like lines from each of the 3 elements. Looking at the X-pt region the McPherson observed the Ni-like Nb spectrum. Preliminary results indicate that the line ratios in Mo agree with the theoretical predictions at lower densities. The preliminary result for Nb is that the ratios are in qualitative agreement with theory. The injections were quite successfull. Both the Nb and the Pd came off the slide very well (i.e. better than Mo). Both are good materials for future impurity injections. Possible 'cooling waves' were seen on the outer channels of the GPC for some of the Nb injections. The shot by shot account follows: Shot 1 fizzle Shot 2 Weak Mo inj. at 0.6 s Shot 3 Weak Mo inj. at 0.6 s Shot 4 OK Mo inj. at 0.6 s Shot 5 OK Mo inj. at 0.6 s Shot 6 OK Mo inj. at 0.6 s Shot 7 OK Mo inj. at 0.6 s Shot 8 Weak Mo inj. at 0.95 s Shot 9 OK Mo inj. at 0.95 s Shot 10 OK Mo inj. at 0.95 s Shot 11 Weak Mo inj. at 0.95 s Shot 12 Weak Mo inj. at 0.95 s Shot 13 Good Nb inj. at 0.6 s Shot 14 Good Nb inj. at 0.6 s Shot 15 disruption at 0.42 s Shot 16 disruption at 0.41 s Shot 17 Good Nb inj. at 0.6 s Shot 18 Good Nb inj. at 0.6 s Shot 19 Good Nb inj. at 0.6 s Shot 20 Good Nb inj. at 0.95 s; Hards early due to low density Shot 21 Good Nb inj. at 0.95 s Shot 22 Good Nb inj. at 0.95 s; Hards early due to low density Shot 23 TF failure Shot 24 Good Nb inj. at 0.95 s Shot 25 Try for Pd inj. at 0.95 s, but Imp. Inj. gate valve was closed. (We didn't know this till later.) Shot 26 Try for Pd inj. at 0.6 s, but Imp. Inj. gate valve was closed. (We didn't know this till later.) Shot 26 Try for Pd inj. at 0.6 s, but Imp. Inj. gate valve was closed. (We didn't know this till later.) Shot 27 Try for Pd inj. at 0.6 s, but Imp. Inj. gate valve was closed. (We didn't know this till later.) Shot 28 Try for Mo inj. at 0.6 s, but Imp. Inj. gate valve was closed. (We didn't know this till later.) Shot 29 Try for Mo inj. at 0.6 s, but Imp. Inj. gate valve was closed. (Now we discover that the gate valve isn't opening) Shot 30 OK Mo inj. at 0.6 s Shot 31 Good Pb inj. at 0.6 s Shot 32 Good Pb inj. at 0.6 s Scorecard: 28 good plasmas 2 disruptions before 0.5 s 1 fizzle 1 dud _____________ Total 32 |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:54:067PM |
| Author: To Be Determined |
| Physics operator's summary for run 950428. SL - Mark May PO - R. Granetz EO - V. Bertolino/J. Daigle MP 111 - Investigations of an Edge Electron Density Diagnostic Using Line Ratios of Ni-like and Co-like Transtions in Pd, Mo, and Nb. The goals of this run are to test the density dependence of the Ni-like and Co-like line ratios of Molybdenum (Z=42), Niobium (Z=41), and Paladium (Z=46). This will be done using the Molybdenum Monitor and the McP VUV spectrometers. HIREX will be observing X-ray line from these elements. The run requires many identical plasma shots, so that various spectrometers can look at several wavelengths of several charge states of several elements at several densities. Despite this need for many shots, we would have been able to complete this miniproposal were it not for a problem with the TCI CO2 laser halfway through the run. This necessitated a cell entry, which didn't solve the problem. Therefore for the latter half of the run, we did not have effective NL_04 density feedback control. Eventually we did manage to get good density feedback control using the Z-meter signal, but this was not until late in the run. For much of the afternoon, we were using only pre-programmed voltage on the pulse gas valve. Other than this problem, the machine ran extremely well. The only other problems were two VDE's caused by EFC problems, one shot with no TF (for unknown reasons), and an inadvertently closed gate valve on the laser ablation system, which resulted in several shots with no impurity injection. Stats: 30 plasmas (only 2 disruptions, both due to an EFC problem) 1 fizzle 1 dud (TF didn't turn on) Mundane, boring details follow. One interesting note: late in the run we started playing with density feedback using the Z-meter. Shot 001 - Fizzle. Null looks good. Next shot: change pre-fill from 2.3 to 2.1e-5 torr, and fire in molybdenum. Shot 002 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Density didn't quite make it to 1.4e20 by t=1.0 s Strike points look okay from EFIT, but probes don't seem to agree. Next shot: start density rise 50 ms earlier. Inject moly again. Shot 003 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Density nearly made it to 1.38 by t=1.0 s. Next shot: no changes. Shot 004 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Next shot: no changes to shot, but change spectrometer wavelength. Delay due to engineering init failure. Re-cycle. Shot 005 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Next shot: no changes to shot, change to different wavelength. Shot 006 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Next shot: no changes to shot, change to 4th wavelength. Shot 007 - Plasma. Good shot, ramped all the way down. Moly injected at 0.6 s. Next shot: no changes to shot. Fire in moly at 0.95 s in order to get data at higher density. Spectrometer on same wavelength as previous shot. Shot 008 - Plasma. Good shot, ramped all the way down. Moly injected at 0.95 s. Next shot: no plasma changes. Change spectrometer wavelength. Shot 009 - Plasma. Good shot, ramped all the way down. Moly injected at 0.95 s. Next shot: no plasma changes. Change spectrometer wavelength. Shot 010 - Plasma. Good shot, ramped all the way down. Moly injected at 0.95 s. Next shot: Minor tweak to STRKPSI, as requested by Blip. Change to 4th & final wavelength. Shot 011 - Plasma. Good shot, ramped all the way down. This should have been the last shot with molybdenum injection (at 0.95 s), but the injection was not good enough. Next shot: another slight tweak to STRKPSI at Bruce's request. Everything else remains the same. Shot 012 - Plasma. Good shot, ramped all the way down. This was the last shot with molydenum injection. Next shot: Another slight tweak to STRKPSI (in the opposite direction) at Bruce's request. Change to injecting niobium, at t=0.6 s (i.e. at lower plasma density). Set spectrometer accordingly. Shot 013 - Plasma. Good shot, ramped all the way down. Good niobium injection. Next shot: no plasma changes. Change spectrometer wavelength. Shot 014 - Plasma. Good shot, ramped all the way down. Good niobium injection. Next shot: Increase density during the latter part of the shot from nl_04=1.7e20 m-2 (from 1.4e20). Change wavelength also. TF scanner tests using the PEI being done between this shot and the next one. Shot 015 - Plasma. Disrupted at 0.42 s. Looks like it may have been a problem with low EFC current, leading to the VDE. It was definitely not due to any impurity injection. Next shot: repeat. There's a problem with the CO2 laser. May have to have cell entry after the next shot. Shot 016 - Plasma. Disrupted at 0.41 s. EFC has a problem. Engineers are checking it. Data data for nl_04. Jim Irby is in the cell working on it. Next shot: repeat (Niobium at 0.6 s, with density climbing to nl=1.7e20 m-2 during latter part of shot.) Long break while Jim Irby works on CO2 in cell, and engineers check out EFC. It looks like we won't have reliable CO2 operation for the remainder of the day. That means no density feedback. So for the next shot, I've copied the M-out voltage trace for the A-side valve (after multiplying by 10) and put it into the pre-programmed voltage for A-side valve, and turned off the feedback gain on the NL_04 wire. No problems were found with EFC. Shot 017 - Plasma. Good shot, ramped all the way down. Good niobium injection. Interferometer worked, except for channel 04. Density was very similar to previous shots. Next shot: increase late gas puff voltage a little, and change spectrometer to 4th & final wavelength. Shot 018 - Plasma. Good shot, ramped all the way down. Good niobium injection. Density is a bit higher late in the shot. Next shot: increase late gas puff some more. Shot 019 - Plasma. Good shot, ramped all the way down. Good niobium injected at 0.6 s. Density is unchanged. Next shot: move the gas puff increase earlier by 100 ms, to try and get higher density. Niobium injection will be at 0.95 s, at the higher density. Shot 020 - Plasma. Good shot, ramped all the way down. The density was much lower early in the shot, which resulted in some runaways and hard x-rays in the middle of the shot. Long pause while we try to get feedback working using the Z-meter signal. Unfortunately we failed due to a problem with the `factor' being off by 10**-6, so I gave up and just tweaked up the pulse gas pre-programmed voltage around 0.1 s to get rid of the hard x-rays seen on the previous shot. Next shot: increase pre-programmed gas valve voltage around 0.1 s. Shot 021 - Plasma. Good shot, ramped all the way down. Good niobium injection at 0.95 s. Next shot: no plasma changes. Switch spectrometer wavelength. Shot 022 - Plasma. Good shot, ramped all the way down. Good niobium injection at 0.95 s. Density was a little low at 0.4 s, again resulting in some hard x-rays. Next shot: tweak up the pre-programmed gas voltage, and re-charge the plenum. Niobium injection again at 0.95 s. Shot 023 - Dud. No TF Next shot: tweak STRKPSI for Bruce. Delay due to alternator problem. Shot 024 - Plasma. Good shot, ramped all the way down. Good niobium injection at 0.95 s. Density was higher than the previous shot (because the plenum was higher). This was the last shot with niobium injection. Next shot: move start of high density gas puff later (to 0.66 s) and fire palladium at t=0.6 s. Shot 025 - Plasma. Good shot, ramped all the way down. No observation of palladium injection. Z_meter was loaded onto wire 14 (instead of NL_04) for this shot, with zero gain, in order to check the estimator. It seems to have worked. Next shot: Gain on Z-meter feedback turned on at very low level (P=0.1), for continued testing. Shot 026 - Plasma. Good shot, ramped all the way down. Still no sign of the palladium. Jim Terry will increase the laser power. Next shot: lower the pulse gas programming around 0.5 s, to get the density back down to 1.e20 m-3 at that time. Also increase the gain on the Z-meter density feedback to P=1.0. This should give about a 5 volt contribution to the pulse gas valve. Shot 027 - Plasma. Good shot, ramped all the way down. Palladium is not showing up. We will give up on the palladium. Next shot: no plasma changes. Inject molybdenum at t=0.6 s, when the yag is giving ne0=1.1e20 m-3. Shot 028 - Plasma. Good shot, ramped all the way down. Molybdenum injection was not too good. Jim Terry will make another adjustment to the laser. Next shot: increase gain on Z-meter density feedback to P=5.0 Shot 029 - Plasma. Good shot, ramped all the way down. No moly seen in plasma. J.T. has discovered their gate valve was inadvertently closed. Probably happened before the palladium. Next shot: inject molybdenum with gate valve open. Note: density feedback using the z-meter signal is working nicely. Shot 030 - Plasma. Good shot, ramped all the way down. Good molybdenum signal at t=0.6 s. Next shot: no plasma changes, but inject palladium. Shot 031 - Plasma. Good shot, ramped all the way down. Good palladium injection. Next shot: try to increase density late in the shot (to test the z-meter density feedback), using the Z-meter wire, and turning down the pre-programmed voltage. All of these changes are at 0.65 s, since the palladium injection at 0.6 s should still be at ne0=1.0e20 m-3. Shot 032 - Plasma. Good shot, ramped all the way down. Good palladium injection. Z-meter density feedback worked nicely. Central density reached ne0=2.7e20 m-3 at t=1.0 s. End of run. |
| Session Leader Comments | |||
| Apr 28 1995 08:38:28:040AM | Mark May | We will be injecting three elements (Pd, Nb, Mo) at two different densities
(ne 1.0E20 cm-3, 2-3Ecm-3) This run is MP 111 Investigations of an Edge Electron Density Diagnostic Using Line Ratios of Ni-like and Co-like Transitions in Pd,Mo, Nb. Permissives, McP, Moly Mon, ECE, Impurity Injector | |
| Physics Operator Comments | |||
| Apr 27 1995 07:29:34:990PM | Robert Granetz | RUN PLAN:
--------- SL - May PO - Granetz MP 111 - Investigations of an Edge Electron Density Diagnostic Using Line Ratios of Ni-like and Co-like Transtions in Pd, Mo, and Nb. - Discharge Cleaning in D2 - Load Shot 950426021 which has a density ramp with nl04 going from 0.5 to 1.4E20. The start of the density ramp should be moved from 0.5 to 0.7 sec. We will inject impurities into the lower or the higher density regime. The X-point should be programmed to a more normal location using STRIKEPSI to locate the outer strike point at probe 3. | |
| Apr 27 1995 07:29:53:720PM | Robert Granetz | - 8 constant shots injecting Mo: 4 into the low density/ 4 into the high
density portion of the plasma. - 8 constant shots injecting Nb: 4 into the low density/ 4 into the high density portion of the plasma. - 8 constant shots injecting Pd; 4 into the low density/ 4 into the high density portion of the plasma. The goals of this run are to test the density dependence of the Ni-like and Co-like line ratios of Molybdenum (Z=42), Niobium (Z=41), and Paladium (Z=46). This will be done using the Molybdenum Monitor and the McP VUV spectrometers. HIREX will be observing X-ray line from these elements. | |
| Apr 28 1995 08:35:22:930AM | 950428001 | Robert Granetz | Shot 001 - Fizzle. Null looks good.
Next shot: change pre-fill from 2.3 to 2.1e-5 torr. |
| Apr 28 1995 08:48:49:180AM | 950428002 | Robert Granetz | Shot 002 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Density didn't quite make it to 1.4e20 by t=1.0 s Strike points look okay from EFIT, but probes don't seem to agree. Next shot: start density rise 50 ms earlier. Inject moly again. |
| Apr 28 1995 09:04:13:060AM | 950428003 | Robert Granetz | Shot 003 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Density nearly made it to 1.38 by t=1.0 s. Next shot: no changes. |
| Apr 28 1995 09:17:09:240AM | 950428004 | Robert Granetz | Shot 004 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Next shot: no changes to shot, but change spectrometer wavelength. |
| Apr 28 1995 09:38:04:080AM | 950428005 | Robert Granetz | Shot 005 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Next shot: no changes to shot, change to different wavelength. |
| Apr 28 1995 09:49:04:310AM | 950428006 | Robert Granetz | Shot 006 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Next shot: no changes to shot, change to 4th wavelength. |
| Apr 28 1995 10:01:38:920AM | 950428007 | Robert Granetz | Shot 007 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.6 s. Next shot: no changes to shot. Fire in moly at 0.95 s in order to get data at higher density. Spectrometer on same wavelength as previous shot. |
| Apr 28 1995 10:14:22:550AM | 950428008 | Robert Granetz | Shot 008 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.95 s. Next shot: no plasma changes. Change spectrometer wavelength. |
| Apr 28 1995 10:29:33:430AM | 950428009 | Robert Granetz | Shot 009 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.95 s. Next shot: no plasma changes. Change spectrometer wavelength. |
| Apr 28 1995 10:48:56:790AM | 950428010 | Robert Granetz | Shot 010 - Plasma. Good shot, ramped all the way down. Moly injected
at 0.95 s. Next shot: Minor tweak to STRKPSI, as requested by Blip. Change to 4th & final wavelength. |
| Apr 28 1995 11:03:45:270AM | 950428011 | Robert Granetz | Shot 011 - Plasma. Good shot, ramped all the way down. This should have been
the last shot with molybdenum injection (at 0.95 s), but the injection was not good enough. Next shot: another slight tweak to STRKPSI at Bruce's request. Everything else remains the same. |
| Apr 28 1995 11:19:54:720AM | 950428012 | Robert Granetz | Shot 012 - Plasma. Good shot, ramped all the way down. This was the last
shot with molydenum injection. Next shot: Another slight tweak to STRKPSI (in the opposite direction) at Bruce's request. Change to injecting niobium, at t=0.6 s (i.e. at lower plasma density). Set spectrometer accordingly. |
| Apr 28 1995 11:27:56:600AM | 950428013 | Robert Granetz | Shot 013 - Plasma. Good shot, ramped all the way down. Good niobium
injection. Next shot: no plasma changes. Change spectrometer wavelength. |
| Apr 28 1995 11:45:56:680AM | 950428014 | Robert Granetz | Shot 014 - Plasma. Good shot, ramped all the way down. Good niobium
injection. Next shot: Increase density during the latter part of the shot from nl_04=1.7e20 m-2 (from 1.4e20). Change wavelength also. |
| Apr 28 1995 12:01:06:890PM | 950428015 | Robert Granetz | Shot 015 - Plasma. Disrupted at 0.42 s. Looks like it may have been a
problem with low EFC current, leading to a VDE. It was definitely not due to any impurity injection. Next shot: repeat. |
| Apr 28 1995 12:22:09:300PM | 950428016 | Robert Granetz | Shot 016 - Plasma. Disrupted at 0.41 s. EFC has a problem. Engineers are
checking it. Data data for nl_04. Jim Irby is in the cell working on it. Next shot: repeat (Niobium at 0.6 s, with density climbing to nl=1.7e20 m-2 during latter part of shot.) |
| Apr 28 1995 01:00:17:920PM | 950428017 | Robert Granetz | Prior to shot 017:
Long break while Jim Irby works on CO2 in cell, and engineers check out EFC. It looks like we won't have reliable CO2 operation for the remainder of the day. That means no density feedback. So for the next shot, I've copied the M-out voltage trace for the A-side valve (after multiplying by 10) and put it into the pre-programmed voltage for A-side valve, and turn off the feedback gain on the NL_04 wire. No problems were found with EFC. |
| Apr 28 1995 01:09:45:450PM | 950428017 | Robert Granetz | Shot 017 - Plasma. Good shot, ramped all the way down. Good niobium
injection. Interferometer worked, except for channel 04. Density was very similar to previous shots. Next shot: increase late gas puff voltage a little, and change spectrometer to 4th & final wavelength. |
| Apr 28 1995 01:24:12:360PM | 950428018 | Robert Granetz | Shot 018 - Plasma. Good shot, ramped all the way down. Good niobium
injection. Density is a bit higher late in the shot. Next shot: increase late gas puff some more. |
| Apr 28 1995 01:34:17:250PM | 950428019 | Robert Granetz | Shot 019 - Plasma. Good shot, ramped all the way down. Good niobium
injected at 0.6 s. Density is unchanged. Next shot: move the gas puff increase earlier by 100 ms, to try and get higher density. Niobium injection will be at 0.95 s, at the higher density. |
| Apr 28 1995 02:15:24:630PM | 950428020 | Robert Granetz | Shot 020 - Plasma. Good shot, ramped all the way down. The density was
much lower early in the shot, which resulted in some runaways and hard x-rays in the middle of the shot. Long pause while we try to get feedback working using the Z-meter signal. Unfortunately we failed due to a problem with the `factor' being off by 10**-6, so I gave up and just tweaked up the pulse gas pre-programmed voltage around 0.1 s to get rid of the hard x-rays seen on the previous shot. Next shot: increase pre-programmed gas valve voltage around 0.1 s. |
| Apr 28 1995 02:23:39:790PM | 950428021 | Robert Granetz | Shot 021 - Plasma. Good shot, ramped all the way down. Good niobium
injection at 0.95 s. Next shot: no plasma changes. Switch spectrometer wavelength. |
| Apr 28 1995 02:39:46:850PM | 950428022 | Robert Granetz | Shot 022 - Plasma. Good shot, ramped all the way down. Good niobium
injection at 0.95 s. Density was a little low at 0.4 s, again resulting in some hard x-rays. Next shot: tweak up the pre-programmed gas voltage, and re-charge the plenum. Niobium injection again at 0.95 s. |
| Apr 28 1995 02:47:43:240PM | 950428023 | Robert Granetz | Shot 023 - Dud. No TF
Next shot: tweak STRKPSI for Bruce. |
| Apr 28 1995 03:06:48:190PM | 950428024 | Robert Granetz | Shot 024 - Plasma. Good shot, ramped all the way down. Good niobium
injection at 0.95 s. Density was higher than the previous shot (because the plenum was higher). This was the last shot with niobium injection. Next shot: move start of high density gas puff later (to 0.66 s) and fire palladium at t=0.6 s. |
| Apr 28 1995 03:24:46:950PM | 950428025 | Robert Granetz | Shot 025 - Plasma. Good shot, ramped all the way down. No observation of
palladium injection. Z_meter was loaded onto wire 14 (instead of NL_04) for this shot, with zero gain, in order to check the estimator. It seems to have worked. Next shot: Gain on Z-meter feedback turned on at very low level (P=0.1), for continued testing. |
| Apr 28 1995 03:40:48:060PM | 950428026 | Robert Granetz | Shot 026 - Plasma. Good shot, ramped all the way down. Still no sign of
the palladium. Jim Terry will increase the laser power. Next shot: lower the pulse gas programming around 0.5 s, to get the density back down to 1.e20 m-3 at that time. Also increase the gain on the Z-meter density feedback to P=1.0. This should give about a 5 volt contribution to the pulse gas valve. |
| Apr 28 1995 03:54:10:200PM | 950428027 | Robert Granetz | Shot 027 - Plasma. Good shot, ramped all the way down. Palladium is not
showing up. We will give up on the palladium. Next shot: no plasma changes. Inject molybdenum at t=0.6 s, when the yag is giving ne0=1.1e20 m-3. |
| Apr 28 1995 04:06:16:470PM | 950428028 | Robert Granetz | Shot 028 - Plasma. Good shot, ramped all the way down. Molybdenum injection
was not too good. Jim Terry will make another adjustment to the laser. Next shot: increase gain on Z-meter density feedback to P=5.0 |
| Apr 28 1995 04:21:59:560PM | 950428029 | Robert Granetz | Note: density feedback using the z-meter signal is working nicely.
|
| Apr 28 1995 04:37:43:130PM | 950428029 | Robert Granetz | Shot 029 - Plasma. Good shot, ramped all the way down. No moly seen in
plasma. J.T. has discovered their gate valve was inadvertently closed. Probably happened before the palladium. Next shot: inject molybdenum with gate valve open. |
| Apr 28 1995 04:33:45:940PM | 950428030 | Robert Granetz | Shot 030 - Plasma. Good shot, ramped all the way down. Good molybdenum
signal at t=0.6 s. Next shot: no plasma changes, but inject palladium. |
| Apr 28 1995 04:49:50:870PM | 950428031 | Robert Granetz | Shot 031 - Plasma. Good shot, ramped all the way down. Good palladium
injection. Next shot: try to increase density late in the shot (to test the z-meter density feedback), using the Z-meter wire, and turning down the pre-programmed voltage. All of these changes are at 0.65 s, since the palladium injection at 0.6 s should still be at ne0=1.0e20 m-3. |
| Apr 28 1995 05:00:35:730PM | 950428032 | Robert Granetz | Shot 032 - Plasma. Good shot, ramped all the way down. Good palladium
injection. Z-meter density feedback worked nicely. Central density reached ne0=2.7e20 m-3 at t=1.0 s. End of run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:27:57:830AM | Plasma | Ok | |
| 2 | 08:38:38:550AM | Plasma | Ok | |
| 3 | 08:53:55:220AM | Plasma | Ok | |
| 4 | 09:05:42:730AM | Plasma | Ok | |
| 5 | 09:24:10:310AM | Plasma | Ok | |
| 6 | 09:41:56:360AM | Plasma | Ok | |
| 7 | 09:54:22:210AM | Plasma | Ok | |
| 8 | 10:06:50:090AM | Plasma | Ok | |
| 9 | 10:20:24:830AM | Plasma | Ok | |
| 10 | 10:36:54:800AM | Plasma | Ok | |
| 11 | 10:51:58:740AM | Plasma | Ok | |
| 12 | 11:07:54:210AM | Plasma | Ok | |
| 13 | 11:23:00:140AM | Plasma | Ok | |
| 14 | 11:37:05:070AM | Plasma | Ok | |
| 15 | 11:50:52:270AM | Plasma | Ok | |
| 16 | 12:09:56:440PM | Plasma | Bad | efc voltage low |
| 17 | 12:56:55:260PM | Plasma | Ok | |
| 18 | 01:13:25:050PM | Plasma | Ok | |
| 19 | 01:26:22:230PM | Plasma | Ok | no faults |
| 20 | 01:39:40:750PM | Plasma | Ok | no faults |
| 21 | 02:14:29:820PM | Plasma | Ok | No Faults. |
| 22 | 02:27:40:910PM | Plasma | Ok | No Faults. |
| 23 | 02:40:43:290PM | Plasma | Bad | No TF supply. |
| 24 | 02:49:10:720PM | Plasma | Ok | No Faults. |
| 25 | 03:10:52:510PM | Plasma | Ok | No Faults. |
| 26 | 03:25:40:580PM | Plasma | Ok | No Faults |
| 27 | 03:41:13:050PM | Plasma | Ok | No Faults. |
| 28 | 03:56:24:120PM | Plasma | Ok | No Faults. |
| 29 | 04:10:14:800PM | Plasma | Ok | NO Faults. |
| 30 | 04:23:00:650PM | Plasma | Ok | No Faults. |
| 31 | 04:36:17:590PM | Plasma | Ok | No Faults. |
| 32 | 04:51:23:310PM | Plasma | Ok | No Faults. |
| 33 | 05:12:33:480PM | Plasma | Ok | No Faults |