| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Steve Scott,Jin-Seok Ko,Miklos Porkolab |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Andy Pfeiffer,Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| am: MP491 MSE calibrations pm: MP500 Development of diverted AT target S |
| Session Leader Plans |
| Entered: Mar 17 2008 09:38:04:097AM |
| Author: Jin-Seok Ko |
| Session Leader Plan for AM MSE beam-into-gas calibrations MP491 A. single-shot reproducibility evaluation * three identical shots. - one shot at beginning of day - one shot at the end of the morning run for MP491 - Last shot of the day. * conditions: beam-into-gas with fields, no plasma. - TF and gas programming from shot 1070831006 - EF3 and EF4 wveforms from: 1. Take both from 1070529008 (EF3=9.5, EF4=0) 2. OR take both EF3 and EF4 from 1070831033 and then set EF4=0. - Make sure that EF4 is ""open"" so we don't induce currents in it. - Note: these conditions are BT=constant, EF3=constant, EF4=0 = constant. - DNB: will be operated in modulated mode to get high current and hopefully a current that remains relatively constant throughout the pulse. Start at 0.2 sec, end at 1.7 sec. Proposed on/off timing is on/off = 80/20 ms, but this will be adjusted as needed to get a nice waveform. B. Single-shot full MSE calibration * TF, EF3 and EF4 conditions taken from 1070831006. * 2 shots. these will have the same TF, EF3 and EF4 waveforms but different torus pressures. * first shot: torus pressure = constant = 0.5 mTorr * second shot: torus pressure = 1.5 mTorr (See shots 1070529003 / 004 for an example of how to increase the torus pressure from 0.5 to about 1.3 mTorr). * close torus values to improve constancy of torus pressure * large ramps on EF3 and EF4. * 6 PSI on torus gas plenum. Deuterium gas. C. Single-shot torus pressure scan * 2 shots, with same TF but different EF --> to give different pitch angle. * 1st shot: conditions = 1070529007, including gas puffing, TF, EF3, EF4. * 2nd shot: conditions = 1070529010, including gas puffing, TF, EF3, EF4. * In both shots: BT = constant, EF3 and EF4 = constant. Ramp the torus pressure. * DNB modulated, probably at 80/20 ms = on/off. start 0.05, end 1.5 sec. D. Verify MSE filter temperature * 2 shots, identical. * start with conditions from shot 1070615027. Then modify as indicated in file fields_and_mflux_1070615027.pdf. * These waveforms are intended to provide constant pitch angle as the BT is ramped from 5.0 --> 6.2 Tesla. * MSE filter temperatures will be optimized for 5.4 Tesla. * Gas puffing taken from shot A above, adjusted as necessary to get about 0.5 mTorr, and constant torus pressure versus time. * MSE will evaluate polarization fraction versus time. * DNB: modulated as described above. Start time = 0.05 sec. end time = 1.5 sec. |
| Entered: Mar 17 2008 05:57:58:993PM |
| Author: Eric Edlund |
| MP #500 (continued from 1080228)
We will continue the development of the AT scenario by extending the LHCD pulse and increasing power towards the 1 MW limit. We will run at 90 to 120 degree phasing to try to deposit the current off-axis. The first part of this run day will be devoted to increasing the LH performance, which has been limited by low density near the grill in the earl plasma phase. We will experiment with different gas puffing techniques to try to increase the edge density near the LH limiter, both through the LH capillaries and the NINJA, and perhaps also by adjusting the target density control. Following successful application of LHCD, we will attempt to increase its power and then add ICRH to the ramp-up, using the J antennas only. ------------------------------------------ Setup: ECDC and bake at 60C overnight. equilibrium target: 1080228035 ICRF: J transmitters in STANDBY LH: use same waveform as from 1080228035, start with 90 degree phasing gas: enable NINJA and LH capillaries cryo-pump: no DNB: yes diagnostics: 1) PCI at 10 Mhz 2) magnetics at 10 Mhz 3) cNPA set with aperture appropriate for shot similar to 1080222028 4) Neutrons and Hirex to monitor Ti 5) ECE and Thompson 6) MSE to monitor changes in the central q profile |
| Physics Operators Plans |
| Entered: Mar 17 2008 10:39:42:053PM |
| Author: Robert Granetz |
Engineering setup for Tuesday 18 Mar 2008
am: MP491 MSE calibrations
pm: MP500 Development of diverted AT target
(plus one final shot for MP491)
Session leader: S. Scott (am); E. Edlund (pm)
Physics operator: R. Granetz
Normal overnight ECDC in D2 and 60 C bake.
Run will start at 09:00 and end at 17:00.
Power systems as on 1070831006 (DNB into gas with TF, EF3, and EF4)
A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Enabled (standard
configuration)
Gas Setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA with 10 psi D2 DISABLED
Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, Z-bolo
Torvac setup: close gate valves during PULSE state; can be opened as soon
as PULSE state is done (for a.m. run only)
Specific diagnostics:
am: MSE
pm: PCI at 10 MHz; magnetics at 10 MHz; CNPA set with aperture appropriate
for shot similar to 1080222028; neutrons and hirex to monitor Ti;
ECE and TS; MSE to monitor changes in the central q-profile
-------------------------------------------------------------------------------
ICRF Setup: J-port ready to run at noontime
LH Setup: yes, up to 1 MW; start with 90 degree phasing
DNB: yes, for both am and pm runs
Cryopump: not needed
-------------------------------------------------------------------------------
Run plan:
MP491 -- Seg 1 is all that is used for this. Load from shot 1070831006.
Copy EF3 and EF4 waveforms from 1070529008 and set EF4=0. Make
sure that EF4 is ""open"" so we don't induce currents in it for the
first shot.
MP500 -- Load shot 1080228035; load seg 1 from any recent non-cryopump
successful startup. REMEMBER to turn on seg 1 AND 2 !!
|
| Session Leader Summaries |
| Entered: Mar 18 2008 06:28:51:623PM |
| Author: Jin-Seok Ko |
| MP419. MSE beam-into-gas calibration There are 4 main parts in this run: A. Shot-to-shot reproducibility: 4 shots B. Single-shot full calibration: 2 shots C. Pressure scan: 2 shots D. BT scan (filter scan): 2 shots Detailes: A. Successful. 4 shots planed, 6 shots taken, and 4 shots obtained. 4 identical shots were taken at the beginning, around 11:15am, around 4:50pm, and around 5:10pm. We see shot-to-shot drifting which is channel dependent and also the 'interval' dependent. This strongly implies the thermal effect on the MSE canister. B. Successful. 2 shots planned and 2 shots obtained. The range of about 10 deg pitch angle was scanned within a shot by ramping EF3 and EF4. Two such shots were taken at 0.5 mTorr and 1.5 mTorr torus pressure. C. Successful. 2 shots planned and 2 shots obtained. Pressure scan (0.25 -> 3 mTorr) within a shot with two different fixed EF configuration (pitch angle). This will help extrapolate the pressure dependence on the pitch angles due to the secondary neutral effects. D. Successful. 2 shots planned, 3 shots taken, and 2 shots obtained. BT ramp from 4.9 to 6.2T within a shot, which effectively changes the amount of 4pi radiation that goes into the MSE bandpass filters. 2 identical shots were taken and we did see the polarization fraction changes during a shot. Summary: ++++++++++++++++++++++++ shot comments ++++++++++++++++++++++++ 1080318001 A1 1080318002 B1 1080318003 B2 1080318004 C1 1080318005 C2 1080318006 wrong EF 1080318007 D1 1080318008 D2 1080318009 wrong EF 1080318010 No DNB 1080318011 A2 1080318028 A3 1080318029 A4 ++++++++++++++++++++++++ |
| Entered: Mar 18 2008 07:39:51:577PM |
| Author: Miklos Porkolab |
| Summary by M. Porkolab.
Run started after 12 pm, for half day. The objective was to continue where we left off on Feb 28th, when on shot 35 we succeeded to couple in 400 kW of LHCD power at 120 degrees phasing into an early diverted discharge with current ramp. However, the shot lasted only until 0.25 second, at 400 kW, with 0.8 MW of ICRF power (J port only !). After that time the density at the edge dropped too low level for effective LHCD coupling. Today the plan was to add gas with gas puffing and with NINJA, around 0.2 seconds, to increasse the edge density for good LH coupling. There was no cryopumpo on this run. We were successful in that we were able to inject gas and maintain LHCD coupling in a number of discharges, with or without ICRF power. However, as the ICRF power was raised, coupling became problematic after 0.32 seconds when the density dropped again to too low values. in particualr, the density puffing with NINJA had to be tuned to the correct level, otherwise the LH launcher arced out due to ionization of excessive gas in front of the launcher. As the gas puff was lowered, effective coupling could be achieved without ICRH. With ICRH added, coupling became problematic after 0.32 seconds, typically, at power levels above 1.5 MW. Eric Edlund monitored RSAE for reverssed shear profile. Also, X-Rays were analyzed by Andrea Schmidt to see whether we had good LHCD, as indicated by the fast electron population. Some relevant observations are as follows: 1. On shot 1080318015, and 1080318016, got the right amount of gas puff, and maintained steady LH coupling from 0.2-0.5 second (no ICRF, LH about 0.6 MW) 2. In several of the following shots, played with plasma equilibrium, and the LH arced out once more at 0.3 sec. However, on shot 1080318020, got excellent LH coupling, steady up to 0.5 seconds, at 0.5 MW. Decided to turn on ICRF heating in this target plasma at 0.18 seconds. (Typically, LH was injected starting at 0.14 seconds). Sawteeth typically would start at 0.30 second . 3. Shot 1080318026, clean 1.5 MW CRF power until 0.5 seconds. LHCD stays on unitl 0.32 seconds, then drops out due to low edge density, then recoveres at 0.45 seconds and plasma enters int H mode. X ray analysis indicates good current drive at 0.2-0.3 seconds in L mode, (Te=3.0 keV) but later in the shot in H mode not much evidence of LHCD driven fast electrons. Signal to noise about unity, probably mostly gammas from neutron bombardment of walls (Andrea). Some cascades at 0.20-0.22 second (only). 4. Next shot at 2.0 MW ICRF power, LHCD at 0.7 MW , plasma disrupts at 0.32 seconds due to impurity injection. Very weak cascades at 0.20-0.22 seconds. Sawteeth move earlier at 0.26 seconds, indicating perhaps impurity accumulation. It is clear from all the runs that high ICRF power (above 1.5 MW) is detrimental to RS plasmas, the sawteeth move earlier and the cascades disappear. Also, could achieve good edge density control with NINJA and gas puff, at least up to 0.5 seconds. Strong evidence of current drive with LHCD during rampup and L mode plasmas. As the plasma enters H mode in the second half of the pulse with higher edge densities, LHCD couples even at 120 degrees phasing but so far there is no evidence of effective current drive even though the power is coupled in,at least up to a net power of 0.7 MW. Magnetic field was kept at 5.4 Tesla in all shots. We speculate that central heating with ICRF at 0.18 seconds heats the plasma core too rapidly and current penetration is not slowed down, but the higher temperature increases conductivity in the center, current peaks and the LHCD is not effective enough in broadening the currrent profiule, or even delay sawteeth. Propose that in the future make an attempt at off-axis current drive, perhaps at 70 MHz or with MCCD, or with changing the magnetic field strength for AT target plasma formation. The big question is profile consistency in L mode. |
| Physics Operator Summaries |
| Entered: Mar 18 2008 05:31:24:703PM |
| Author: Robert Granetz |
Run summary for Tuesday 18 Mar 2008
am: MP491 MSE calibrations
pm: MP500 Development of diverted AT target plasma
Session leader: am: Scott/Ko
pm: Porkolab/Edlund
Physics operator: R. Granetz
The first half-day run (MP491) went extremely well. We ran beam-into-gas
with several different waveforms for TF, EF3, and EF4, and torus pressure.
The beam worked well, with beam currents from 6.5-7 amps at 50 kV, and very
few faults. At the end of the day we repeated shot 01 twice (shots 28 and
29) to gather further information on thermal effects on the MSE channels.
The results are very clear: channels near the optical axis are very
reproducible (+/- a couple tenths of a degree), which the channels that are
far off-axis changed by several degrees.
The 2nd half-day was devoted to MP500. By tweaking the pulse gas
programming, the NINJA timing, the NINJA plenum pressure, and the outer
gap, we were able to get consistent enough edge densities to allow
reasonably good operation of the LH into the early current ramp. Best shot
was 1080318020. Later in the run we also were able to couple in up to 1.6
MW of ICRF into the early current ramp.
A final note about the DNB: by the end of the run it was operating
successfully with the fizzle detector enabled.
Scorecard: 15 plasmas
13 beam into gas w/fields
0 duds
1 fizzles
0 power supply tests
0 no-power MDS shot cycles
--------------
Total: 29 shot cycles
|
| Session Leader Comments | |||
| Mar 18 2008 08:49:16:143AM | Jin-Seok Ko | MSE setup: Shutter OPEN Linear polarizer IN (shrouded) PEM ON with no cooling Oven ON Chiller OFF Bertan ON APD power supply ON Dead ch8 Retardance: 0638/0638 HV: 1870/1870/1870/1870 Filter: 5.4T/50keV Initial DNB setting: starts at 0.2 sec and ends at 1.7 sec on/off = 80/20 msec | |
| Mar 18 2008 09:06:22:877AM | 1080318001 | Jin-Seok Ko | A1. First shot of ""single-shot reproducibility"" DNB is good with Ibeam > 6A except one fault at the beginning Pressure constancy is good with G-Side MKS ~ 0.5 mTorr MSE signal is good. Next: Move on to B1 (""single-shot full calibration"") |
| Mar 18 2008 09:26:12:627AM | 1080318002 | Jin-Seok Ko | B1. ""single-shot full calibration"" at low pressure DNB is good with Ibeam ~ 6A Pressure constancy is good with G-Side MKS ~ 0.5 mTorr MSE signal is good. Next: Move on to B2 (""single-shot full calibration"" at high pressure |
| Mar 18 2008 09:52:09:923AM | 1080318003 | Jin-Seok Ko | B2. ""single-shot full calibration"" at high pressure DNB is good with Ibeam ~ 6A Pressure constancy is not perfect. During the DNB pulse, it goest from 1.5 to 1.25. Not unsatisfactory though. Not much we can do. MSE signal is good. Next: Move on to C1 (""single-shot pressure scan"") |
| Mar 18 2008 10:11:34:237AM | 1080318004 | Jin-Seok Ko | C1. ""single-shot pressure scan"" with finite EF's DNB is good with Ibeam ~ 6A. Small fault at the end Satisfactory pressure scan. There were some uncertainties which signals were really indicating the torus pressure. By comparing the time variation of the MSE raw signals from 1070529007 (reference) and this shot, we concluded that we had the same pressure as 1070529007. MSE signal is good. We see the competition between the beam attenuation (MSE signal decrease) and the amount of light source (MSE signal increase) Next: Move on to C2 (""single-shot pressure scan"" with one EF open) |
| Mar 18 2008 10:30:53:003AM | 1080318005 | Jin-Seok Ko | C2. ""single-shot pressure scan"" with EF3 open DNB is good with Ibeam ~ 6A. One fault at the beginning Satisfactory pressure scan. Now G-Side MKS shows the real pressure change. This signal in the previous shot failed to show the real pressure. MSE signal is good. We see the same competition between the beam attenuation (MSE signal decrease) and the amount of light source (MSE signal increase) Next: Move on to D1 (""filter scan"") |
| Mar 18 2008 10:32:07:143AM | 1080318006 | Jin-Seok Ko | D1. ""filter scan"" Forgot to turn back on EF3. Next: Try again D1 |
| Mar 18 2008 11:03:13:330AM | 1080318007 | Jin-Seok Ko | D1. ""filter scan"" DNB is good with Ibeam ~ 6A. Two faults near the end. EF3, EF4 are correctly modified (Thank you, Bob). G-Side MKS again not real but based on G-Side MKS from the previous shot (006), we think we got constant 0.5 mTorr. Next: D2. (repeat of this shot) |
| Mar 18 2008 11:04:50:410AM | 1080318008 | Jin-Seok Ko | D2. ""filter scan"" (repeat of D1) DNB is good with Ibeam ~ 6A. Small partial fault at the beginning. Two more faults later. G-Side MKS again not real but based on G-Side MKS from shot 006, we think we got constant 0.5 mTorr. Next: A2 (""single-shot reproducibility"", the second shot) |
| Mar 18 2008 11:32:40:020AM | 1080318009 | Jin-Seok Ko | A2. ""single-shot reproducibility"" DNB was very very very good but there was a mistake in loading a correct shot. This shot: repeat of shot 8 except EF4 off Next: try again A2. |
| Mar 18 2008 11:32:57:157AM | 1080318010 | Jin-Seok Ko | A2. """"single-shot reproducibility"""" Beam didn't go Also, the pressure was decreasing during the shot. Torus valves were open. Next: try again A2 |
| Mar 18 2008 11:43:14:267AM | 1080318011 | Jin-Seok Ko | A2. ""single-shot reproducibility"" DNB is good with Ibeam ~ 6A Pressure a little low at the end but satisfactory The end of the AM portion of MP491. We will have two more shots (A3, A4; single-shot reproducibility) at the end of the PM run. |
| Mar 18 2008 12:36:46:237PM | 1080318012 | Miklos Porkolab | Fizzle. |
| Mar 18 2008 01:09:50:563PM | 1080318013 | Miklos Porkolab | Coupled LH power. 600 KW at 0.2 sec.
LH on until 0.26 sec, then edge density gets too low and LH drops out. |
| Mar 18 2008 01:11:13:050PM | 1080318014 | Miklos Porkolab |
Shot disrupted early due to injection, probably not due to LH. |
| Mar 18 2008 01:29:31:397PM | 1080318015 | Miklos Porkolab | Density puff worked, kep density up and LH pulse to 0.5 sec.
Will extend gas puff on next shot to 1 sec. LH power at 120 degrees at about 600 KW. |
| Mar 18 2008 01:32:36:963PM | 1080318016 | Miklos Porkolab | Density puff worked, kep density up and LH pulse to 0.5 sec.
Will extend gas puff on next shot to 1 sec. LH power at 120 degrees at about 600 KW. |
| Mar 18 2008 02:28:07:610PM | 1080318017 | Miklos Porkolab | LH arced out after 0.35 sec. |
| Mar 18 2008 02:29:13:717PM | 1080318018 | Miklos Porkolab | LH arced out after 0.3 sec. |
| Mar 18 2008 02:32:37:640PM | 1080318019 | Miklos Porkolab | LH arced out after 0.3 sec.
Edge densty around 3^18 m-3. |
| Mar 18 2008 02:47:23:453PM | 1080318020 | Miklos Porkolab | Best shot of the day.
LH stays on at 0.5 MW f0r 0.5 sec. Edge density depletion controlled with NINJA control. Will turn on ICRF next shot. |
| Mar 18 2008 03:04:29:720PM | 1080318021 | Miklos Porkolab | ICRF on at 0.8 MW, starting at 0.18 sec. LH and ICRF trip around 0.32 sec.
Sawteeth moved in earlier, from 0.3 sec with LHCD only, to 0.26 with ICRF + LHCD. Not so good. |
| Mar 18 2008 03:19:14:810PM | 1080318022 | Miklos Porkolab | ICRF on at 0.8 MW, good to 0.5 sec, steady.
LH trip around 0.32 sec. Then retry a little later and good from 0.42 to 0.62 sec. Sawteeth irregular to 0.4 sec. Cascades showed up after 0.2 sec. |
| Mar 18 2008 04:16:00:907PM | 1080318023 | Miklos Porkolab | ICRF power clean, at 1.5 MW.
Te=3 keV. LH on until 0.285 sec, then drops out until 0.45 sec, when power injection resumes normally. Plasma enters H mode at 0.45 sec, with ICRF and LH on. Sawteeth delayed until 0.29 sec. Sawteeth resume about the same time the LH drops out, due to very low edge density (below 1^18m-3). |
| Mar 18 2008 07:13:07:763PM | 1080318023 | Miklos Porkolab | ICRF on at 0.8 MW, good to 0.5 sec, steady. Raised LH power to 0.7 MW net.
LH trip around 0.30 sec. Then retry a little later and good from 0.45 to 0.62 sec. Sawteeth irregular from 0.27 to 0.4 sec. Almost no cascade, may see one. Will try to increase ICRF power on next shot to 1.5 MW. |
| Mar 18 2008 04:18:50:877PM | 1080318024 | Miklos Porkolab | ICRF power clean, at 1.5 MW.
Te=3 keV. LH on until 0.285 sec, then drops out until 0.45 sec, when power injection resumes normally. PCI digitizer did not work. Plasma enters H mode at 0.45 sec, with ICRF and LH on. Sawteeth delayed until 0.29 sec. Sawteeth resume about the same time the LH drops out, due to very low edge density (below 1^18m-3). |
| Mar 18 2008 04:27:40:313PM | 1080318025 | Miklos Porkolab | ICRF power clean, at 1.5 MW until 0.5 sec.
Te=3 keV. LH on until 0.32 sec, then drops out until 0.45 sec, when power injection resumes normally. PCI digitizer did not work once more. Plasma enters H mode at 0.45 sec, with ICRF on until 0.5 sec, LH until 0.62 sec. |
| Mar 18 2008 04:40:26:750PM | 1080318026 | Miklos Porkolab | ICRF power clean, at 1.5 MW until 0.6 sec.
Te=3 keV. LH on until 0.32 sec, then drops out until 0.45 sec, when power injection resumes normally. PCI digitizer works. Some cascades at 0.2--0.22 second. Plasma enters H mode at 0.45 sec, with ICRF on until 0.6 sec, LH until 0.62 sec. |
| Mar 18 2008 05:43:26:937PM | 1080318027 | Miklos Porkolab | ICRF power clean, at 2.0 MW, disrupts at 0.31 second.
Significant impurity injection. Te=3 keV. 0.7 MW LH on until 0.32 sec, then drops out until 0.45 sec, when power injection resumes normally. PCI digitizer works. Some cascades at 0.2-0.22 second only. Plasma enters H mode at 0.45 sec, with ICRF on until 0.6 sec,LH until 0.62 sec. |
| Mar 18 2008 05:08:00:390PM | 1080318028 | Jin-Seok Ko | From this shot, MSE Beam-into-calibration resumes. A3. ""single-shot reproducibility"" DNB is good with Ibeam > 6A Pressure is a little higher than 0.5 mTorr but satisfactory MSE signal is good. Next: Repeat of this (A4) |
| Mar 18 2008 05:09:06:437PM | 1080318029 | Jin-Seok Ko | A4. ""single-shot reproducibility"" DNB is good with Ibeam > 6A Pressure is a little higher than 0.5 mTorr but lower than the previous shot. Satisfactory MSE signal is good. End of this run |
| Physics Operator Comments | |||
| Mar 18 2008 08:57:09:207AM | Robert Granetz | DPCS loaded as per my logbook entry from last night. | |
| Mar 18 2008 09:12:17:000AM | 1080318001 | Robert Granetz | Shot 01 -- Beam with TF and EF3 and gas. Coil waveforms had long flattop. Torus pressure = 0.6 mTorr. Next shot: TF w/EF3 and EF4, with Coil waveforms ramping to 10 kA and 5 kA respectively (taken from shot 107831006 seg 1) |
| Mar 18 2008 09:24:48:500AM | 1080318002 | Robert Granetz | Shot 02 -- Beam into gas with TF, EF3, EF4. Pressure=0.6 mTorr D2. Next shot: increase pre-fill pulse to 500 ms (from 188 ms) in order to raise torus pressure to 1.5 mTorr. |
| Mar 18 2008 09:51:28:033AM | 1080318003 | Robert Granetz | Shot 03 -- Beam into gas with TF, EF3, EF4. Pressure=0.15 mTorr (but not quite constant). Torus gate valves were closed, as requested. Next shot: load seg 1 from 1070529007 |
| Mar 18 2008 10:10:27:627AM | 1080318004 | Robert Granetz | Shot 04 -- Beam into gas w/TF, EF3, EF4. Gas pressure was ramped. The F-side ratiomatic, G-side MKS, and F-Cryo MKS are all very different. Next: load seg 1 from 1070529010. This has finite programming in EF3, but we really want no current in EF3 for this shot, so I'll have the engineers open the EF3 breaker AND turn off the gate drive power supply. (Hope I remember.) EF4 will be negative. |
| Mar 18 2008 10:27:52:690AM | 1080318005 | Robert Granetz | Shot 05 -- Beam into gas with TF, EF4 (no EF3). Ramped pressure. Next shot: Way too complicated to explain. |
| Mar 18 2008 10:32:03:063AM | 1080318006 | Robert Granetz | Shot 06 -- Beam into gas w/TF, EF4. Wanted EF3, but with all the zillion other changes, I forgot to have it re-enabled. Next shot: repeat 06 with EF3 enabled this time. |
| Mar 18 2008 10:46:26:207AM | 1080318007 | Robert Granetz | Shot 07 -- Beam into gas with TF, EF3, EF4. Various waveforms. Pressure=0.6 mTorr. Next shot: repeat, no changes |
| Mar 18 2008 11:06:40:220AM | 1080318008 | Robert Granetz | Shot 08 -- Beam into gas with TF, EF3, EF4; various waveforms; repeat of shot 07. Next shot: reload shot 01. Remember to open EF4 breaker. |
| Mar 18 2008 11:16:05:080AM | 1080318009 | Robert Granetz | Shot 09 -- Beam into gas with TF, EF3. No EF4, as requested, but the waveforms were wrong. I didn't load into the DPCS model. Next shot: try again for a repeat of shot 01. |
| Mar 18 2008 11:30:51:970AM | 1080318010 | Robert Granetz | Shot 10 -- Beam didn't fire. Russian sequencer ignored the trigger. Next shot: try one more time to repeat shot 01. |
| Mar 18 2008 12:22:52:283PM | 1080318011 | Robert Granetz | Shot 11 -- Beam into gas with TF and EF4. This was a repeat of shot 01. End of MSE calibration (except for a final shot at the end of today). Next shot: Load all segments from 1080228035. Change pre-fill pulse to 18 ms (from 55 ms), since the cryopump is not on today. Have torus gate valves remain open during shot. Disable DNB HV until we get a reliable plasma, since we've been blasting away at the inboard wall for the entire morning. |
| Mar 18 2008 12:34:37:800PM | 1080318012 | Robert Granetz | Shot 12 -- Fizzle. Pre-fill pressure was only .046. Next shot: raise pre-fill to 23 ms. |
| Mar 18 2008 12:55:28:673PM | 1080318013 | Robert Granetz | Shot 13 -- Plasma. Disrupted at t=1.24 s; not sure why. I note that EF4 is programmed to turn off at t=1.20 s, which is unusually early. Startup was good. Next shot: reduce pre-fill by 2 ms. |
| Mar 18 2008 01:13:30:300PM | 1080318014 | Robert Granetz | Shot 14 -- Plasma, but disrupted at 0.27 s due to an injection. Next shot: add pre-programmed gas from t=0.2 to 0.5 s (50 volts) |
| Mar 18 2008 01:23:55:670PM | 1080318015 | Robert Granetz | Shot 15 -- Plasma. Disrupted at t=1.37 s. Good startup. Got rid of the density pumpout from t=0.2 to 0.5 s. Next shot: extend pre-programmed gas puff to t=1.0 s. Extend EF4 programming by 0.2 s. |
| Mar 18 2008 01:43:17:077PM | 1080318016 | Robert Granetz | Shot 16 -- Plasma. Good full-length shot. Good density control up to t=1 s. Next shot: tweak RCUR to keep outer gap more constant from t=0.2-0.6 s. |
| Mar 18 2008 01:53:00:983PM | 1080318017 | Robert Granetz | Shot 17 -- Plasma. Full-length shot. Outer gap was more constant. Density control is also good, at least in the core. Edge density at the grill is still dropping though. Next shot: no DPCS changes; Greg will try some NINJA puffing |
| Mar 18 2008 02:11:21:140PM | 1080318018 | Robert Granetz | Shot 18 -- Plasma. Full-length shot. Next shot: NINJA changes only. |
| Mar 18 2008 02:31:36:500PM | 1080318019 | Robert Granetz | Shot 19 -- Plasma. Full-length shot. Next shot: no DPCS changes; decrease NINJA plenum pressure |
| Mar 18 2008 02:42:43:720PM | 1080318020 | Robert Granetz | Shot 20 -- Plasma. Full-length shot. Very good LH performance...no faults. Next shot: no DPCS changes; turn on ICRF (J-port only) |
| Mar 18 2008 03:01:04:060PM | 1080318021 | Robert Granetz | Shot 21 -- Plasma. Full-length shot. Got 0.8 MW from J-port, plus 0.4-0.6 MW of LH. Next shot: no DPCS changes |
| Mar 18 2008 03:13:38:750PM | 1080318022 | Robert Granetz | Shot 22 -- Plasma. Full-length shot. P_ICRF=0.8 MW with no faults. LH had a few faults. Next shot: more LH power |
| Mar 18 2008 03:27:05:547PM | 1080318023 | Robert Granetz | Shot 23 -- Plasma. Good shot. 0.8 MW of ICRF from J-port. 0.55-0.75 MW LH, w/faulting. Next shot: no DPCS changes; increase ICRF power |
| Mar 18 2008 03:55:23:623PM | 1080318024 | Robert Granetz | Shot 24 -- Plasma. Good shot. 1.7 MW of ICRF, which gives a brief early H-mode. PCI data acquisition is having problems. Quick cell access for PCI. Next shot: no DPCS changes |
| Mar 18 2008 04:24:18:657PM | 1080318025 | Robert Granetz | Shot 25 -- Plasma. Good shot. Prf=1.6 MW. P_LH=0.55-0.7 MW w/faults. Next shot: no DPCS changes |
| Mar 18 2008 04:35:04:733PM | 1080318026 | Robert Granetz | Shot 26 -- Plasma. Good shot. Prf=1.6 MW. PLH=0.6-0.7 MW w/faults. Next shot: no DPCS changes; this will be the last shot of MP500. |
| Mar 18 2008 04:48:29:953PM | 1080318027 | Robert Granetz | Shot 27 -- Plasma, but disrupted at t=0.32 s due to lots of injections. Next shot: beam-into-gas w/TF and EF3. No NINJA; leave torus gate valves closed during PULSE. |
| Mar 18 2008 05:16:29:093PM | 1080318028 | Robert Granetz | Shot 28 -- Beam into gas with TF and EF3. Pressure=0.6 mTorr D2. Good beam pulse...the first time firing into plasma with the fizzle detector enabled. Next shot: repeat, no changes |
| Mar 18 2008 05:19:24:657PM | 1080318029 | Robert Granetz | Shot 29 -- beam into gas with TF and EF3. Pressure = 0.6 mTorr D2. Good beam pulse. End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:58:47:970AM | Test | Ok | MSE beam to gas TF EF3 |
| 2 | 09:17:00:800AM | Test | Ok | MSE beam TF EF3&4 |
| 3 | 09:35:36:440AM | Test | Ok | mse beam TF EF3&4 |
| 4 | 09:52:12:453AM | Test | Ok | MSE beam TF EF3&4 |
| 5 | 10:13:26:597AM | Test | Ok | MSE beam TF EF4 |
| 6 | 10:28:01:923AM | Test | Ok | MSE beam TF EF4 |
| 7 | 10:40:33:643AM | Test | Ok | MSE beam TF EF3&4 |
| 8 | 10:56:59:220AM | Test | Ok | MSE beam TF EF3&4 |
| 9 | 11:11:42:330AM | Test | Ok | MSE beam TF EF3 |
| 10 | 11:24:26:707AM | Test | Ok | |
| 11 | 11:36:56:970AM | Test | Ok | |
| 12 | 12:28:44:533PM | Plasma | Ok | |
| 13 | 12:41:18:173PM | Plasma | Ok | |
| 14 | 12:56:27:953PM | Plasma | Ok | |
| 15 | 01:14:12:430PM | Plasma | Ok | |
| 16 | 01:26:51:823PM | Plasma | Ok | |
| 17 | 01:43:44:610PM | Plasma | Ok | |
| 18 | 02:03:41:093PM | Plasma | Ok | |
| 19 | 02:16:31:547PM | Plasma | Ok | |
| 20 | 02:28:55:873PM | Plasma | Ok | |
| 21 | 02:50:31:810PM | Plasma | Ok | |
| 22 | 03:03:35:890PM | Plasma | Ok | |
| 23 | 03:16:08:077PM | Plasma | Ok | |
| 24 | 03:41:45:157PM | Plasma | Ok | |
| 25 | 04:12:26:577PM | Plasma | Ok | |
| 26 | 04:26:18:720PM | Plasma | Ok | |
| 27 | 04:39:01:610PM | Plasma | Ok | |
| 28 | 04:51:21:297PM | Plasma | Ok | |
| 29 | 05:04:25:017PM | Plasma | Ok | |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mar 18 2008 08:58:39:330AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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