| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yijun Lin |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Cochran,Gary Dekow,Bill Parkin |
| Engineering Operator Run Comment |
| MP#390 |
| Session Leader Plans |
| Entered: Jul 18 2005 08:28:05:840AM |
| Author: Yijun Lin |
| Run plan, 07/18. Monday, MP 390 D(He3) minority heating evaluation at 50 MHz.
Special gas: 15 psi He3, B-side upper RF: all transmitters on run-on by 8:30 am. Plan (for two run days) 1. (10 shots) Start a plasma with B = 3.4 T, ip = 0.6 MA, nl = 0.8 e20m^-2 (similar to 1050302017 ) to check the operationality of J antenna. The RF power of J starts at 0.3 MW. Need to check transmitters behavior, phase control, arc detection, and RF pickup by other diagnostics. After J antenna is shown to be operational with correct phasing, I will do a current scan, 0.5, 0.7, .9 MA at this field (check M. Greenwald for details), and establish some baseline shots for future low field operation. 2. (10 shots) He3 puff scan. B field at 5.0 T, Ip = 1.0 MA, nl04=1.0e20 m^-2. Scan He3 puff shot by shot: 5, 10, 20, 30, 40, 50, 60, ... 100 ms. Monitor the H-mode threshold (if there is H-mode), and Wtot. Compare J-antenna heating with D+E heating. Use the ratio of Wtot in these two time period as a measure. Monitor FRC ECE signal, and search for any evidence of mode conversion heating (for example, one or two channels have a much higher temperature during J-antenna heating than during D/E heating). We will also use PCI to monitor the MC waves. 3. (10 shots) Run constant power and compare J ant with D+E antenna (B field at 5.2 T). Start from the He3 puff time that gave the best J heating from 2. Run constant RF power, J 1.5 MW and D+E at 1.5 MW. (Program fast turn-offs for dW/dt and MC heating study). Scan the He3 puff and generate a similar curve of He3 dependence of heating effectiveness (cf. Fig. 1 in the MP), also use the ratio of Wtot as a proper measure. We will scan the He3 puff up to a point where clear evidence of MC heating is observed. 4. (3 shots) Use the optimal gas puff, vary the antenna phase shot by shot, [0, pi, pi, 0], [0, pi/2, pi, 3/2pi] and [0, -pi/2, pi, -3/2pi], J at 1.5 MW, D+E at 1.5 MW. (B = 5.2 T) 5. (5 shots) Upper single null plasma (load shot 1050629014, lower B field to 5.2 T). Do H-mode power threshold comparison. (same RF waveform as in 1.) (Need as high power as possible from D+E > 2 MW) 6. (5 shots) Overlay all antennas to obtain total 2.5 MW RF (varying the power ratio of J and E). Run several shots near the peak performance of the J heating. (also program fast turn-offs on E and J antennas at two different time points). 7. (5 shots) density scan. Run nl 04 = 0.5, 0.7, .9, 1.1, 1.3 e20 m^-2. Adjusting the He3 puff time to keep nHe3/ne approximately constant. RF waveform same as in 3. |
| Physics Operators Plans |
| Entered: Jul 18 2005 08:29:27:340AM |
| Author: Jim Irby |
| Physop Plan 1050718
MP 390 D(He3) Minority Heating Evaluation at 50 MHz SL: Lin PO: Irby Following the up-to-argon to fix the leak at b-hor and to replace the leaking gatevalve at e-top on 7/14, we successfully leakchecked on 7/15 and have run ECDC in D2 at 2e-4 Torr from 7/15 to early this morning. Engineering setup as on 1050302017 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 15 psi He3, disabled (PG2) fill B-main with 40 psi D2 Hybrid enabled (PG3) Enable the following: ECE and VUV gate valves, Z-bolo shutters ICRF Setup: transmitters in run-on at 8:30 |
| Session Leader Summaries |
| Entered: Jul 18 2005 04:39:25:360PM |
| Author: Yijun Lin |
| A good run overall.
Part 1 of the SL_PLAN was skipped due to a problem with high humidity of FMIT #4 (J4) crowbar cabinet. The operationality of J port was checked using shots in part of he3 scan, and J3/J4 ran together well (and heating!). We used J3 power ramping to 1.2 MW (on-axis) to finish the He3 scan on part 2 of the SL-PLAN. H-mode was obtained at power level about 1 MW (about the same as the threshold of E port, a little bit off-axis). He3 puffs at 60 - 80 ms was shown to be the optimal level. Mode conversion was observed from FRC ECE data. At 100 ms puff, the he3 level is about 8% during H-mode as estimated from break-in-slope locations. (so the best heating is at about 5-6% He3, similar to the curve shown in the MP). Part 3 of the SL-PLAN has also been carried out. Some residual He3 was found accumulated shot by shot. It was eliminated by a no He3 puff shot (shot 27). The last shot (shot 30) had a clear comparison of He3 heating and E heating. It seems to me that the heating efficiency of D(He3) at 70 ms puff is not as good as D(H). The puff time may not be optimized yet. (Note in shot 18, J3 on axis was about the same as E off-axis). The run was stopped at about 4:15pm due to power problems with NSTAR, the electricity company. |
| Physics Operator Summaries |
| Entered: Jul 18 2005 05:53:57:360PM |
| Author: Jim Irby |
| We had no vacuum related problems running the machine today following the up-to-argon last week to replace the f-top CNPA gate valve. ECDC was run from Friday until this morning to make sure the machine was as clean as possible. H/(H+D) was very low all day. We did have a fizzle and three duds that I thought were the result of gas levels, but Steve Wolfe pointed out they were probably because I used an old startup that did not properly take care of supply offsets. This mistake may also explain some early injections as the plasma thrashed around a bit. Shot 10 ran okay, but appeared to have gas coming in well before the prefill, as has been seen on several runs over the last few weeks.
We had a couple of cycle tests at the beginning of the run, and a couple of shots w/o power because of an alternator excitation problem and an ICRF fault before the shot. The high humidity in the power room probably caused two crowbar faults before the run. After we reduced the power room temp and waited about an hour, the crowbar came back online successfully. A failed/faulted turbine at the Kendall NSTAR power plant stopped the run about 45 minutes early today. |
| Session Leader Comments | |||
| Jul 18 2005 08:35:13:887AM | 1050718001 | Yijun Lin | No plasma test shot. |
| Jul 18 2005 09:58:04:073AM | 1050718004 | Yijun Lin | Plasma.
Problem in applying HV on FMIT#4 this morning. We will run #3 independently for a while. I need to revise plan. Run a 3.5 T shot, then start He3 puff experiments until #4 is back to business. If we found that J3 heating is OK, I may skip the first part with low current D(H) heating in the original plan. |
| Jul 18 2005 10:27:39:407AM | 1050718005 | Yijun Lin | Plasma. 3.5 T.
J3 went at 250 kW. next: J3 ~ 1 MW, E ~ 1 MW, separately. 5 ms He3 puff. 5 Tesla, 1.0 MA, nl 1.e20m^-2 |
| Jul 18 2005 10:36:01:703AM | 1050718006 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 5 ms He3 puff at 0.3 sec.
(Jason Sears asked to fire MHD antennas at below 1 kW level.) RF: J3 only: 0.6-1.0 sec, power ramp from 0.6 to 1.2 MW. E: 1.1 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: fizzle |
| Jul 18 2005 11:17:19:093AM | 1050718007 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 5 ms He3 puff at 0.3 sec.
RF: J3 only: 0.6-1.0 sec, power ramp from 0.6 to 1.2 MW. E: 1.1 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot. 59 kJ at 0.8 sec before an injection. H-mode during E port heating. (threshold at 0.8 MW) (also found J3DC1F gives me less power than J3dc0f. J3DC1F has not been calibrated recently, while J3DC0F is. I am going to switch the net power reporting of J to DC0F for both j3 and j4) Next: 10 ms He3 |
| Jul 18 2005 11:05:41:593AM | 1050718008 | Yijun Lin | Fizzle |
| Jul 18 2005 11:32:12:093AM | 1050718009 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 10 ms He3 puff at 0.3 sec.
RF: J3 only: 0.6-1.0 sec, power ramp from 0.6 to 1.2 MW. E: 1.1 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot. (Very small effect on GPC2 and FRCECE in compared with E port) (Pick up seen by the neutron detector) Next: 20 ms He3. |
| Jul 18 2005 12:15:51:703PM | 1050718010 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 20 ms He3 puff at 0.3 sec.
RF: J3 only: 0.6-1.0 sec, power ramp from 0.6 to 1.2 MW. E: 1.1 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot and neutrons (5.5e11) (Very small effect on GPC2 and FRCECE compared to E port (H-mode) FMIT #4 stayed on after HV on locally. And also by computer. Next: 30 ms He3. with j3/j4 overlapped for 100 ms. |
| Jul 18 2005 12:01:22:860PM | 1050718011 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 30 ms He3 puff at 0.3 sec.
RF: J3 only: 0.6-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1 MW power. 1.05 to 1.15 sec, see if they can run together. E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. result: Fizzle. next: start J3 at 0.7 sec, so that the current is flat top (easier to identify any rf heating from ECE signals) |
| Jul 18 2005 12:15:23:047PM | 1050718012 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 30 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1 MW power. 1.05 to 1.15 sec, see if they can run together. (digital phase at 293 degree) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot and neutrons (8.5e11). Also some from ECE signals H-mode by E port. J3/J4 ran together. Raw digital phase at 0.5 V (phase locked). Not far away from [0,pi, pi, 0] (faulting due to mismatch). Next: change digital phase to 250 degree and see what I get. Next: 40 ms He3. |
| Jul 18 2005 12:37:02:750PM | 1050718013 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 40 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1 MW power. 1.05 to 1.15 sec, (digital phase at 250 degree) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: dud |
| Jul 18 2005 12:43:18:297PM | 1050718014 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 40 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1 MW power. 1.05 to 1.15 sec, (digital phase at 250 degree) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot (60 kJ) and neutrons (1.e12). Also some from ECE signals H-mode by E port. J3/J4 ran together. Raw digital phase at 1.74 V (phase locked). ( I was going the wrong way). Next: change digital phase to 320 degree. Next: 50 ms He3. |
| Jul 18 2005 12:50:32:173PM | 1050718015 | Yijun Lin | dud |
| Jul 18 2005 01:15:57:423PM | 1050718016 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 50 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1 MW power. 1.05 to 1.15 sec, (digital phase at 320 degree) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. Some heating from J3 as seen from Wtot and neutrons (1.3e12). Also some from ECE signals. H-mode by E port. J3/J4 ran together (70 ms). Raw digital phase at -0.15V. (It is good enough for heating phase). Next: 60 ms He3. run 1.5 MW J3+J4. Still using J3 for this scan. Change digital phase to 315 degree. |
| Jul 18 2005 01:23:06:297PM | 1050718017 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 60 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1.5 MW power. 1.05 to 1.15 sec, (digital phase at 315 degree) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. H mode at 0.98 sec. Near the end of J3 pulse. (Good!) Clear evidence from ECE signals. neutrons (1.3e12) before H-mode. H-modes by E port J3/J4 ran together (two faults) at 1.5 MW. Raw digital phase at 0.03. (perfect for eating phase. No more change for now). Next: 70 ms He3. |
| Jul 18 2005 01:28:36:173PM | 1050718018 | Yijun Lin | No power shot. Alternator problem. |
| Jul 18 2005 02:05:26:063PM | 1050718019 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 70 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1.5 MW power. 1.05 to 1.15 sec, (digital phase at 315 degree.[0,pi, pi, 0] heating phase) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. H mode at 0.95 sec. Near the end of J3 pulse. (earlier than shot 17) Clear evidence from ECE signals. neutrons (1.3e12) before H-mode. (Possible break-in-slope on FRC ECE signal. peaked at chanel 27, R = 66 cm) Liang Lin found possible MC signals at 920 kHz from PCI. H-mode by E port. (J3 and E port seem to have similar effect. E port is off-axis though). J3/J4 ran together (two faults) at 1.5 MW. (H-mode) Next: 80 ms He3. (cont. scanning and to mode conversion region) |
| Jul 18 2005 02:17:10:593PM | 1050718020 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 80 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1.5 MW power. 1.05 to 1.15 sec, (digital phase at 315 degree.[0,pi, pi, 0] heating phase) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. H mode at 0.975 sec. Near the end of J3 pulse. (later than shot 19). ECE signals seem to suggest direct electron heating. Break-in-slope(?) on FRC ECE channel 28 at 1.14 sec. H-mode by E port. J3/J4 ran together (1 fault) at 1.5 MW. (H-mode) Jim suggested that mass 3 has increased lately. Next: 100 ms He3. (bigger step) |
| Jul 18 2005 02:22:04:157PM | 1050718021 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 100 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1.5 MW power. 1.05 to 1.15 sec, (digital phase at 315 degree.[0,pi, pi, 0] heating phase) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. H mode at 0.985 sec. Near the end of J3 pulse. (later than shot 20). ECE signals seem to suggest direct electron heating. Break-in-slope(?) on FRC ECE channel 17, 18, and 27, 28, 19 at 1.12 sec. (MC layer seems to be at 0.66 cm, 3 cm on the HFS of the He3 resonance layer). He3 level is about 8% estimated using this info. i think it rather a mixture of minority heating and MC heating. H-mode by E port. J3/J4 ran together (2 faults) at 1.5 MW. (H-mode) Next: 120 ms He3. |
| Jul 18 2005 03:05:21:970PM | 1050718022 | Yijun Lin | Ip = 1 MA, Bt = 5 T, 0.9e20 m^-2, 120 ms He3 puff at 0.3 sec.
RF: J3 only: 0.7-1.0 sec, power ramp from 0.6 to 1.2 MW. J3 + J4: 1.5 MW power. 1.05 to 1.15 sec, (digital phase at 315 degree.[0,pi, pi, 0] heating phase) E: 1.2 to 1.5 sec, power ramp from 0.6 to 1.2 MW. Result: Plasma. No H-mode during J3 heating. ECE signals seem to suggest direct electron heating. Break-in-slope(?) on FRC ECE channel 17, 18, and 27, 28, 19 at 1.12 sec. (MC layer seems to be at 0.66 cm, 3 cm on the HFS of the He3 resonance layer). He3 level is about 8% estimated from this location (in H-mode). i think it rather a mixture of minority heating and MC heating. H-mode by E port. J3/J4 ran together at 1.5 MW (no fault). (H-mode) Next: 70 ms He3, 5.2 Tesla. start part 3 of the SL_PLAN |
| Jul 18 2005 02:43:08:280PM | 1050718023 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 0.9e20 m^-2, 70 ms He3 puff at 0.3 sec.
RF: J3 + J4: 1.5 MW power. .7 to 1.05 sec, digital phase at 315 degree.[0,pi, pi, 0] E: 1.15 to 1.5 sec, 1.2 MW D: .15 to 1.5 sec, .3 MW Result: Plasma. (He3 level should be 5-6%) D: max faults. bad matching. E: max faults. J clean. Next: run higher density. target 1.0e20 nl04 to have H-mode more EDA like. |
| Jul 18 2005 02:55:21:813PM | 1050718024 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, 70 ms He3 puff at 0.3 sec.
RF: J3 + J4: 1.5 MW power. .7 to 1.05 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed notch at 0.9 sec. E: 1.15 to 1.5 sec, 1.2 MW. programed notch at 1.3 sec D: .15 to 1.5 sec, .3 MW. programed notch at 1.3 sec Result: Plasma. (He3 level should be 5-6%) D: max faults. max faults E: max faults. max fault. J: one fault. next: same plasma. Run E at 1.0 MW. J at 1 MW. No more D. |
| Jul 18 2005 03:03:01:690PM | 1050718025 | Yijun Lin | No plasma shot. |
| Jul 18 2005 03:22:56:703PM | 1050718026 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, 70 ms He3 puff at 0.3 sec.
RF: J3 + J4: 1. MW power. .7 to 1.0 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed 10 ms notch at 0.9 sec. E: 1.1 to 1.4 sec, 1.0 MW. programed 10 ms notch at 1.3 sec Result: Plasma. (He3 level should be 5-6% in H-mode) E: one fault + the programed notch. J: clean except the programed notch. H-mode right after J off at 1 sec. (no h-mode during J heating). (break-in-slope at R 0.69 m, near axis, 3 cm on the HFS of He3 resonance, 7-8% He3) H-modes when E was on. L-mode performance seems to be the same. next: take a shot without any He3 puff (to eliminate all residule he3). |
| Jul 18 2005 03:29:00:830PM | 1050718027 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, No He3 puff.
RF: J3 + J4: 1. MW power. .7 to 1.0 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed 10 ms notch at 0.9 sec. E: 1.1 to 1.4 sec, 1.0 MW. programed 10 ms notch at 1.3 sec Result: Plasma. (No idea about He3 level. must be small). E: one fault + the programed notch. J: clean except the programed notch. Not much heating seen from J port (no break in slope). (well, we do need some He3 to work) H-modes when E was on. next: 70 ms He3 |
| Jul 18 2005 03:48:50:440PM | 1050718028 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, 70 ms He3 puff at 300 ms.
RF: J3 + J4: 1. MW power. .7 to 1.0 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed 10 ms notch at 0.9 sec. E: 1.1 to 1.4 sec, 1.0 MW. programed 10 ms notch at 1.3 sec Result: Plasma. E: clean except the programed notch. J: clean except the programed notch. No H-mode for either J or E. However, the temperature rising from J is smaller than from E. (not yet in MC heating regime. No break in slope). But I don't know why no H mode with E port. next: repeat |
| Jul 18 2005 03:55:56:547PM | 1050718029 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, 70 ms He3 puff at 300 ms.
RF: J3 + J4: 1. MW power. .7 to 1.0 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed 10 ms notch at 0.9 sec. E: 1.1 to 1.4 sec, 1.0 MW. programed 10 ms notch at 1.3 sec Result: Plasma. E: clean except the programed notch. J: clean except the programed notch. No H-mode for either J or E. However, the temperature rising from J is smaller than from E. (not yet in MC heating regime). But I don't know why no H mode with E port. repeat at higher power. |
| Jul 18 2005 04:17:48:483PM | 1050718030 | Yijun Lin | Ip = 1 MA, Bt = 5.2 T, 1.e20 m^-2, 70 ms He3 puff at 300 ms.
RF: J3 + J4: 1.3 MW power. .7 to 1.0 sec, digital phase at 315 degree.[0,pi, pi, 0]. programed 10 ms notch at 0.9 sec. E: 1.1 to 1.4 sec, 1.3 MW. programed 10 ms notch at 1.3 sec Result: Plasma. E: clean except the programed notch. J: clean except the programed notch. H-mode for J and E. the temperature rising from J is smaller than from E. Max wtot in H-mode is also lower in J than E. (Probably, the He3 level is not optimized.) End of run. (NSTAR lost a turbine, and we are told to shut down for today). |
| Physics Operator Comments | |||
| Jul 18 2005 09:06:22:277AM | 1050718001 | Jim Irby | loaded shot 1050302017 into DPCS --- 3.5 T, 700 kA, 0.8e20 /m^2
zeroed offsets for rcur, clearin, and ip in seg2, and Br0 in seg 1 no a-coil current to start data system test --- looks okay |
| Jul 18 2005 09:28:44:010AM | 1050718002 | Jim Irby | before shot 1 I:
loaded shot 1050302017 into DPCS --- 3.5 T, 700 kA, 0.8e20 /m^2 zeroed offsets for rcur, clearin, and ip in seg2, and Br0 in seg 1 no a-coil current to start for this shot: zeroed pg2 (should have been PLC disabled anyway) prepuff from 13 ms to 18 ms ratiomatic working, but gas system was not ready |
| Jul 18 2005 09:29:49:213AM | 1050718003 | Jim Irby | before shot 1 I:
loaded shot 1050302017 into DPCS --- 3.5 T, 700 kA, 0.8e20 /m^2 zeroed offsets for rcur, clearin, and ip in seg2, and Br0 in seg 1 no a-coil current to start for this shot: zeroed pg2 (should have been PLC disabled anyway) prepuff from 13 ms to 18 ms got gas at last ---- looks okay |
| Jul 18 2005 10:01:22:973AM | 1050718004 | Jim Irby | try for plasma on this shot to check out startup --- no rf
We had two crowbar firings of the #4 crowbar before the run today and are not sure of the cause plasma into rampdown ---- we did have a-coil afterall - will leave on no h_alpha and possibly no ciii signal h/(h+d) about 2% |
| Jul 18 2005 10:19:31:190AM | 1050718005 | Jim Irby | Repeat but with some power from #3 transmitter
plasma --- h-mode during rampdown --- h/(h+d) less than 2% will go to 5.4 T, 1 MA for next shot |
| Jul 18 2005 10:45:27:580AM | 1050718006 | Jim Irby | 5 mS of He3 from b-side upper at 300 mS
John Rice is trying to mix neon and argon in b-side lower Bt to 5.0 T from 3.4 T Ip to 1 MA from 0.7 MA fizzle --- lost control around 12 ms |
| Jul 18 2005 11:05:13:580AM | 1050718007 | Jim Irby | Try again --- no DPCS changes
plasma into rampdown, but almost lost it around 12 mS h-mode at 1.22 s, probably not what the rf guys wanted 900 kW injection at 0.83 s h/(h+d) about 3% |
| Jul 18 2005 11:12:09:297AM | 1050718008 | Jim Irby | 10 ms puff of He3 starting at 300 ms
dud --- fields look good, pressure may be too low |
| Jul 18 2005 11:28:54:453AM | 1050718009 | Jim Irby | increased prefill by 2 ms (now 20 ms)
plasma for 1.73 s good rf power from both J and E-Port antennas |
| Jul 18 2005 11:47:22:970AM | 1050718010 | Jim Irby | helium3 puff to 20 ms (b-side upper, PG2)
plasma into rampdown pressure high in machine before prefill --- mystery continues |
| Jul 18 2005 11:57:31:877AM | 1050718011 | Jim Irby | He3 puff to 30 ms
dud again --- fields okay, add some gas |
| Jul 18 2005 12:18:25:423PM | 1050718012 | Jim Irby | prepuff to 22 ms from 20
plasma into rampdown --- but almost lost it at 14 ms h-alpha signal is back #4 crowbar is back in service --- some power from #4 transmitter that shot |
| Jul 18 2005 12:33:50:127PM | 1050718013 | Jim Irby | He3 puff to 40 ms
no alternator/13.8 for that shot |
| Jul 18 2005 12:43:41:280PM | 1050718014 | Jim Irby | added 1 ms of gas to prefill
plasma for 1.77 s --- good current rist this time some hards showing up beginning to see some heating?? h/(h+d) still 2 to 3% |
| Jul 18 2005 01:00:04:063PM | 1050718015 | Jim Irby | He3 puff to 50 ms starting at 300 ms
dud ---- fields okay, gas was actually high |
| Jul 18 2005 01:14:51:970PM | 1050718016 | Jim Irby | no DPCS changes
plasma into rampdown |
| Jul 18 2005 01:22:19:703PM | 1050718017 | Jim Irby | No DPCS changes
plasma into rampdown J-Port initiated h-mode |
| Jul 18 2005 01:32:03:563PM | 1050718018 | Jim Irby | He3 puff to 70 ms
no power shot --- low helium level at alternator |
| Jul 18 2005 01:48:39:280PM | 1050718019 | Jim Irby | Try again with the alternator and 70 ms of helium 3
plasma into rampdown === h-mode a little earlier from j-port |
| Jul 18 2005 02:01:45:203PM | 1050718020 | Jim Irby | He3 puff to 80 ms
increased seg1 pg3 puff to help with hards plasma into rampdown |
| Jul 18 2005 02:13:26:110PM | 1050718021 | Jim Irby | He3 puff to 100 ms from 80 ms
plasma into rampdown |
| Jul 18 2005 02:28:14:627PM | 1050718022 | Jim Irby | He3 puff to 120 ms from 100 ms
plasma into rampdown less heating from j-port |
| Jul 18 2005 02:45:01:017PM | 1050718023 | Jim Irby | He3 puff to 70 ms
Bt to 5.2 T plasma into rampdown |
| Jul 18 2005 02:59:55:017PM | 1050718024 | Jim Irby | nl04 request to 1.0e20 from 0.8e20 / m^2
plasma into rampdown --- h-modes a little more sustained probable MARFE around .42 s |
| Jul 18 2005 03:12:48:627PM | 1050718025 | Jim Irby | No DPCS changes, but Yijun will lower rf power
no power shot --- some PLC bells ringing in rf corner |
| Jul 18 2005 03:18:50:330PM | 1050718026 | Jim Irby | Plasma into rampdown
fields and pressure look good |
| Jul 18 2005 03:29:23:780PM | 1050718027 | Jim Irby | He3 puff off
plasma into rampdown --- no j-port h-mode |
| Jul 18 2005 03:47:58:673PM | 1050718028 | Jim Irby | He3 puff back on at 70 ms
plasma, but no h-modes from E or J |
| Jul 18 2005 04:01:35:157PM | 1050718029 | Jim Irby | try for h-modes again w/o any changes
plasma, but still no h-modes |
| Jul 18 2005 04:14:49:580PM | 1050718030 | Jim Irby | repeat with more rf power
plasma --- we have h-modes again |
| Jul 18 2005 04:53:50:030PM | 1050718031 | Jim Irby | no power shot to check out gas puffs, but the ratiomatic had been turned off.
Other gauges did respond and indicated resonable puffs from. pg2 was from 1.0 to 1.1 s |
| Jul 18 2005 04:54:05:423PM | 1050718032 | Jim Irby | ratiomatic data looks good |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:31:58:090AM | Test | Ok | |
| 2 | 09:16:28:747AM | Test | Ok | |
| 3 | 09:25:51:400AM | Test | Ok | |
| 4 | 09:38:14:230AM | Plasma | Ok | |
| 5 | 10:08:36:703AM | Plasma | Ok | |
| 6 | 10:33:35:940AM | Plasma | Ok | |
| 7 | 10:46:53:767AM | Plasma | Ok | |
| 8 | 11:02:50:673AM | Plasma | Ok | |
| 9 | 11:16:28:627AM | Plasma | Ok | |
| 10 | 11:31:14:983AM | Plasma | Ok | |
| 11 | 11:50:28:313AM | Plasma | Ok | |
| 12 | 12:04:09:580PM | Plasma | Ok | |
| 13 | 12:20:37:970PM | Plasma | Ok | |
| 14 | 12:34:38:657PM | Plasma | Ok | |
| 15 | 12:47:21:297PM | Plasma | Ok | |
| 16 | 01:00:11:673PM | Plasma | Ok | |
| 17 | 01:14:28:080PM | Plasma | Ok | |
| 18 | 01:27:06:407PM | Plasma | Bad | Alternator was at only 1600 RPM |
| 19 | 01:38:22:627PM | Plasma | Ok | |
| 20 | 01:51:06:173PM | Plasma | Ok | |
| 21 | 02:04:42:030PM | Plasma | Ok | |
| 22 | 02:21:46:640PM | Plasma | Ok | |
| 23 | 02:35:47:500PM | Plasma | Ok | |
| 24 | 02:48:28:733PM | Plasma | Ok | |
| 25 | 03:01:06:030PM | Plasma | Bad | No power shot ACK failure |
| 26 | 03:10:57:190PM | Plasma | Ok | |
| 27 | 03:23:32:280PM | Plasma | Ok | |
| 28 | 03:37:38:907PM | Plasma | Ok | |
| 29 | 03:50:24:970PM | Plasma | Ok | |
| 30 | 04:08:16:923PM | Plasma | Ok | |
| 31 | 04:38:44:280PM | Test | Ok | Gas test |
| 32 | 04:47:25:500PM | Test | Ok | Gas test with ratiomatic! |
| 33 | 04:56:20:720PM | Test | Bad | Gas test, gas not enabled |
| 34 | 05:05:25:690PM | Test | Ok | Gas test with gas! |