| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Ian Hutchinson |
| Engineering operator(s): | Bill Byford,Gary Dekow |
| Engineering Operator Run Comment |
| MP#313 Instrumented Divertor Leakage; SL:LaBombard; PO:Hutch; EO:Dekow/B |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:29:490PM |
| Author: To Be Determined |
| 07/25/02 run: MP#313 Instrumented Divertor Leakage Experiments Session Leader - B. LaBombard Phys Op - I. Hutchinson ________________________________________________________________________________ Goal of MP#313: Quantify the effective conductances of neutral gas through various pathways in and around the lower and upper divertor structures during plasma discharges. ________________________________________________________________________________ Results: We managed to get 20+ good quality discharges today which where set-up to provide quantitative information about gas flow and conductances. The primary tools were the NINJA system in conjunction with pressure gauges (in-vessel and ex-vessel) and the divertor TV camera system. Unfortunately, we did not have edge Thomson or the G-side ionization gauge working today. In addition, the A-port scanning probe decided to ignore triggers and not scan for about half the run. The new miniature Penning gauge under the B-C divertor module ran better than expected, recording fast pressure changes in this region as the B-C flapper was opened or the B-C Bottom capillary was used to puff gas. The gauge geometry is clearly superior to the other Penning gauges in the vessel - they should be replaced at the next opportunity. The miniature gauge was found to track linearly with the B-bottom MKS gauge over a wide range under conditions when these gauges are expected to record roughly the same pressure. We managed to get the divertor camera (DIV2, viewing D-alpha) to see puffs from the B-C and C-D capillaries located above the B-C and C-D flappers. The camera also was able to record changes in local D-alpha light when the flappers were opened, giving us the possibly to 'calibrate' the flow through the flapper. In addition, the pressure under the B-C flap was recorded by the Penning gauge there, which should allow us to estimate the effective conductance through the open flap in the presence of plasma. The "trophy shots" for the divertor camera data are shot#26 (B-C puff/flap) and shot#30 (C-D puff/flap). The B-C flapper appears to yield a fairly large throughput of gas. With 40 mtorr under the flapper, the D-alpha light is not too far below that seen during the B-C capillary gas puff (about 70 torr-liters/sec). Vacuum conductance through the flapper area would yield 92 torr-liters/sec. So if there is a 'plasma plugging' phenomenon going on above the flap, it may be only a 'factor-of-two' sized effect. These numbers will be firmed up later by a careful analysis of the camera/pressure data. In any event, the gas flow through the C-D flap is much less than B-C, perhaps indicating that the pressure under this flap is less than under the B-C flap in a typical discharge. (No Penning gauge exists under the C-D flap.) This suggests that there probably are substantial variations in the pressures under the outer divertor modules in general. In all cases that gas was injected from a capillary tube during the shot, a second identical puff was programmed around 2.2 or 2.7 seconds. Looking at the vessel pressure rise during this second puff (with gate valves closed) will allow us to accurately quantify the gas flow rate through the capillary in each instance. ________________________________________________________________________________ Detailed Run Plan and Results: All shots: Ip=0.8 MA, Bt=5.3 tesla, gate valves closed during shot. Gauge Calibration Shots (short Ip and long TF to keep Penning gauges on) Shot 1 - Fizzle Shot 2 - Ip ramping down to 0 at 1.2 sec, TF flat to 1.5 sec. About 2 mtorr after shot. This is a little too high for the low pressure Penning gauges. Shot 3 - Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. About 2.5 mtorr after shot. This is a little too high for the low pressure Penning gauges. CB_DivL calibration looks good. Shot 4 - again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. About 1.0 mtorr after shot. Looks like the low pressure Penning gauges are having trouble today. CB_DivL looks ok. Vacuum Conductance Tests with Penning Gauges Operating (short Ip and long TF to keep Penning gauges on while puffing gas under flapper) Shot 5 - again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. NINJA: 699 torr D2, puff through C-B Bot capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Nice Data: We got the CB_DivL Penning gauge recording pressure changes under the flapper for two cycles starting at 1.2 seconds. This should give us the vacuum conductance through the flap. Shot 6 - again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. NINJA: 674 torr D2, puff through B-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec B-bottom MKS just records a constant pressure rise, independent of flap open/close Baseline Pressure Readings - Lower X-Point Discharge Shot 7 - Full length plasma, NL04 1 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 80 mtorr on CB_DivL Shot 8 - Full length plasma, NL04 0.8 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 48 mtorr on CB_DivL when flaps close Shot 9 - Full length plasma, NL04 0.75 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 46 mtorr on CB_DivL when flaps close B-C Lower Divertor Leakage Shot 10 - Full length plasma, NL04 0.75 and ramping slightly. NINJA: 663 torr D2, puff through B-C Bot capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec CB_DivL pressure goes to 83 mtorr with flapper closed and up to 47 mtorr with flap open. Shot 11 - NINJA: 663 torr D2, puff through B-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Slight increase in pressure on B-Bottom - does not modulate with flaps Lower Divertor Leakage at E-port Opening Shot 12 -NINJA: 624 torr D2, puff through E-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Increase in pressure on E-Bottom. Second puff should allow us to calibrate the vacuum conductance. Upper Divertor Leakage at E-port Opening Shot 13 - NINJA: 624 torr D2, puff through E-Top capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Increase in pressure on E-Top. Again, second puff should allow us to calibrate the vacuum conductance. B-C Lower Divertor Leakage - 2nd look Shot 14 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 624 torr D2, puff through B-C-Bot capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure rises to 80+ mtorr on CB_DivL Baseline shot Shot 15 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 624 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Good baseline shot. Gas Puff/Flapper Comparison using Divertor Camera DIV2 (D-alpha filtered) Shot 16 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through C-D capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec No Flaps Clearly seen on divertor camera. Shot 17 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec No Flaps Shot 18 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through B-C Bot capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor open from 0.6 to 0.9 sec Clearly seen on divertor camera. CB_DivL saturates at 87 mtorr. Shot 19 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 1368 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor 0.2s open/ 0.2s closed starting at 0.8 sec for 3 cycles CB_DviL records 40/30 mtorr for flap closed/open Unfortunately, the camera systems had a computer problem - no camera data. Lost shot Shot 20 - Repeat of shot 19, without camera operating TCI died. Gas feedback went crazy. ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 1368 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor 0.2s open/ 0.2s closed starting at 0.8 sec for 3 cycles Upper X-point discharge setup Shot 21 - failed attempt Plasma till 1.47s This is not an upper null contrary to advertizing. We got a very strange marfe-like behaviour in the top of the machine and the density rose very high. Shot 22 - Fizzle Baseline Pressure Readings - Upper X-Point Discharge Shot 23 - Upper x-point discharge No ASP and FSP NINJA: 690 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.81 sec E-top pressure goes to 24 mtorr at 1 sec. Good background shot. Upper Divertor Leakage at E-port Opening Shot 24 - Upper x-point discharge ASP scanning at 0.8, 1.0, 1.2 sec NINJA: 690 torr D2, puff through E-top capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.81 sec E-top pressure now goes to 34 mtorr at 1 sec. This should allow us to get the effective conductance. B-C Lower Divertor Leakage - 3rd look Shot 25 - Repeat of shot 19 ASP scanning at 0.8, 1.0, 1.2 sec NINJA: 1339 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: C-divertor 0.2 open/0.2 closed starting at 0.8 sec for 3 cycles Puff and flap is seen on divertor camera. Shot 26 - ASP and FSP scanning at 0.5, 1.0, 1.2 sec NINJA: 1339 torr D2, puff through B-C Flap capillary Trig1: 0.4 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: C-divertor 0.2 open/ 0.2 closed starting at 0.9 sec for 3 cycles Puff and flap is seen on divertor camera - very nice data. Shot 27 - Fizzle Shot 28 - Dud Shot 29 - Dud Shot 30 - ASP and FSP scanning at 0.6, 1.0, 1.2 sec NINJA: 1329 torr D2, puff through B-C Flap capillary Trig1: 0.4 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: D-divertor 0.2 open/ 0.2 closed starting at 0.9 sec for 3 cycles Puff and flap is seen on divertor camera. The flow through the C-D flapper is much less than the puff, unlike on C-B flap. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:15:443PM |
| Author: To Be Determined |
| Physop Summary 1020725 MP313 Instrumented Divertor Leakage Experiments. SL Labombard PO Hutch Summary _______ Machine ran well and we got 30 shots by pressing on regardless. Current rise was quite reliable up till the end when we started having the post 4pm mystery duds. ECDC got a plasma back on shot 30. No ratiomatic signals were available. The planned program was carried out and the SL pronounced himself satisfied. Most shots were vanilla lower null but with varying Ninja puffs as detailed by SL. Shots 2-6 were short duration for the purposes of seeing the Penning gauges after the plasma. Shots 23 and 24 were upper x-point plasmas. These may be useful for future upper x-point operation in this campaign, since they have the predictors all run appropriately for the present magnetics setup. With the strong Ninja puffs there was no sign of a limit to the rate of rise of plasma density. Very fast rises were observed, e.g. on shot 17 from .6 to 1.e20 in about 100ms. This observation seems to disprove the Greenwald hypothesis that the reason we can't gas fuel to the Greenwald limit at reasonable currents (e.g. 800kA) is because of lack of time. I believe that there really is a gas fuelled density limit in C-Mod well below the Greenwald limit. We should explore why. Scorecard _________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.000 0.024 2 1.242 0.794 3 1.127 0.799 4 1.122 0.799 5 1.115 0.799 6 1.109 0.797 7 1.713 0.776 8 1.788 0.779 9 1.874 0.781 10 1.761 0.779 11 1.783 0.781 12 1.870 0.781 13 1.899 0.779 14 1.813 0.779 15 1.839 0.779 16 1.900 0.781 17 1.868 0.784 18 1.791 0.792 19 1.896 0.781 20 1.691 0.773 21 1.472 0.784 22 0.000 0.029 23 1.726 0.789 24 1.819 0.784 25 1.890 0.779 26 1.894 0.776 27 0.000 0.029 28 0.000 0.021 29 0.000 0.024 30 1.896 0.779 Finished summary for 1020725 Total of 30 shots. 30 shots. 25 plasmas. 3 fizzles. 2 duds. Fizzle = gt 27.0 lt 50kA. Details _______ ---------------------------------------------------------------------------- 1020725xxx hutch PHYSICS_OPERATOR Jul 25 2002 9:03:54:640AM . . . . . . . . . . . . . . . . . . . . Mini Proposal 313 Instrumented Divertor Leakage Experiments. PO Hutch SL Labombard Cold Start. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds Start from shot 1020723008 Shorten to .8s Set density to .6 ---------------------------------------------------------------------------- 1020725001 hutch PHYSICS_OPERATOR Jul 25 2002 9:20:39:353AM . . . . . . . . . . . . . . . . . . . . Fizzle. Import segment one from 1020724016. Its br offset is .002 cf .0015 of the previous. ICEF4 is -1310. ---------------------------------------------------------------------------- 1020725002 hutch PHYSICS_OPERATOR Jul 25 2002 9:34:44:610AM . . . . . . . . . . . . . . . . . . . . Plasma ramps down at .8s all the way, terminating at 1.24s. TF on till 1.9s Lower NL04 to 4 from 6. Ramp current down faster. ---------------------------------------------------------------------------- 1020725003 hutch PHYSICS_OPERATOR Jul 25 2002 9:46:06:096AM . . . . . . . . . . . . . . . . . . . . Plasma. Terminates at 1.13s. Had a gas puff near the shot end. Program density to ramp down to prevent ending gas puff. ---------------------------------------------------------------------------- 1020725004 hutch PHYSICS_OPERATOR Jul 25 2002 10:02:10:810AM . . . . . . . . . . . . . . . . . . . . Plasma Add OH2L point at about 1.5 to give 25V trying to reverse swing the OH2 so that we keep the coax resistance down. REMEMBER TO REMOVE IT! ---------------------------------------------------------------------------- 1020725005 hutch PHYSICS_OPERATOR Jul 25 2002 10:19:07:366AM . . . . . . . . . . . . . . . . . . . . Plasma. Big injection at 0.09s, but it recovers. Boswell reports that the injection on shot 4 at .32s has strong Calcium lines. ---------------------------------------------------------------------------- 1020725006 hutch PHYSICS_OPERATOR Jul 25 2002 10:46:01:596AM . . . . . . . . . . . . . . . . . . . . Plasma. TRAQ2 partially screwed. Load segment 2 from 1020723008 TF invert to 1.6. Load. ---------------------------------------------------------------------------- 1020725007 hutch PHYSICS_OPERATOR Jul 25 2002 10:52:23:340AM . . . . . . . . . . . . . . . . . . . . Plasma. Rather a big puff. nl04 to .8 ---------------------------------------------------------------------------- 1020725008 hutch PHYSICS_OPERATOR Jul 25 2002 11:08:22:223AM . . . . . . . . . . . . . . . . . . . . Plasma. Move density feedback P off to 1.5s. nl04 to .7 ---------------------------------------------------------------------------- 1020725009 hutch PHYSICS_OPERATOR Jul 25 2002 11:28:12:083AM . . . . . . . . . . . . . . . . . . . . Plasma. No physop changes. ---------------------------------------------------------------------------- 1020725010 hutch PHYSICS_OPERATOR Jul 25 2002 11:45:47:016AM . . . . . . . . . . . . . . . . . . . . Plasma Loaded segment 2 of 1001006008 into segment 3. (No changes to actual plasma control). ---------------------------------------------------------------------------- 1020725011 hutch PHYSICS_OPERATOR Jul 25 2002 12:01:13:680PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725012 hutch PHYSICS_OPERATOR Jul 25 2002 12:33:40:073PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725013 hutch PHYSICS_OPERATOR Jul 25 2002 12:41:06:336PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725014 hutch PHYSICS_OPERATOR Jul 25 2002 12:41:13:240PM . . . . . . . . . . . . . . . . . . . . Plasma ---------------------------------------------------------------------------- 1020725015 hutch PHYSICS_OPERATOR Jul 25 2002 12:46:08:326PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725016 hutch PHYSICS_OPERATOR Jul 25 2002 1:17:11:670PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725017 hutch PHYSICS_OPERATOR Jul 25 2002 1:39:33:020PM . . . . . . . . . . . . . . . . . . . . PLasma ---------------------------------------------------------------------------- 1020725018 hutch PHYSICS_OPERATOR Jul 25 2002 2:09:12:876PM . . . . . . . . . . . . . . . . . . . . Plasma ---------------------------------------------------------------------------- 1020725019 hutch PHYSICS_OPERATOR Jul 25 2002 2:09:19:893PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725020 hutch PHYSICS_OPERATOR Jul 25 2002 2:29:48:206PM . . . . . . . . . . . . . . . . . . . . Plasma. Interferometer broke and caused wild gas puffs from nl04 feedback. ---------------------------------------------------------------------------- 1020725021 hutch PHYSICS_OPERATOR Jul 25 2002 2:57:46:873PM . . . . . . . . . . . . . . . . . . . . For this shot we switched to segment 3. This should be an upper x-point equilibrium. Set nl04 to 1.e20. Plasma till 1.47s This is not an upper null contrary to advertizing. We got a very strange marfe-like behaviour in the top of the machine and the density rose very high. It turns out we need segment 3 from that shot. 1001006008. Load segment. Call predictors. Set TF to 150000. ---------------------------------------------------------------------------- 1020725022 hutch PHYSICS_OPERATOR Jul 25 2002 3:13:48:226PM . . . . . . . . . . . . . . . . . . . . Fizzle. Br bounced up. Br offset to .0017 from .002 ---------------------------------------------------------------------------- 1020725023 hutch PHYSICS_OPERATOR Jul 25 2002 3:28:53:530PM . . . . . . . . . . . . . . . . . . . . Plasma. Got upper x-point. Late in shot a marfe in the bottom. ---------------------------------------------------------------------------- 1020725024 hutch PHYSICS_OPERATOR Jul 25 2002 3:43:22:960PM . . . . . . . . . . . . . . . . . . . . Plasma. Brian is satisfied with this shot puffing at the top. Switch back to segment 2. ---------------------------------------------------------------------------- 1020725025 hutch PHYSICS_OPERATOR Jul 25 2002 4:01:56:003PM . . . . . . . . . . . . . . . . . . . . Plasma. ---------------------------------------------------------------------------- 1020725026 hutch PHYSICS_OPERATOR Jul 25 2002 4:17:05:120PM . . . . . . . . . . . . . . . . . . . . Plasma ---------------------------------------------------------------------------- 1020725027 hutch PHYSICS_OPERATOR Jul 25 2002 4:28:14:683PM . . . . . . . . . . . . . . . . . . . . Fizzle. ---------------------------------------------------------------------------- 1020725028 hutch PHYSICS_OPERATOR Jul 25 2002 4:42:17:160PM . . . . . . . . . . . . . . . . . . . . Dud. Br offset to .002. ---------------------------------------------------------------------------- 1020725029 hutch PHYSICS_OPERATOR Jul 25 2002 4:56:08:540PM . . . . . . . . . . . . . . . . . . . . Dud 5 min of ECDC. ---------------------------------------------------------------------------- 1020725030 hutch PHYSICS_OPERATOR Jul 25 2002 5:06:07:790PM . . . . . . . . . . . . . . . . . . . . Enter init at 1.2e-6 base pressure. Plasma. |
| Session Leader Comments | |||
| Jul 25 2002 09:34:12:220AM | 1020725002 | Brian Labombard | Shot 2 - plasma, Ip ramping down to 0 at 1.2 sec, TF flat to 1.5 sec. About 2 mtorr after shot. This is a little too high for the low pressure Penning gauges. Next shot: Ip ramp down sooner, Bt extended longer, program lower NL04 |
| Jul 25 2002 09:46:04:550AM | 1020725003 | Brian Labombard | Shot 3 - plasma, Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. About 2.5 mtorr after shot. This is a little too high for the low pressure Penning gauges. CB_DivL calibration looks good. Next shot: remove gas puff during Ip ramp-down |
| Jul 25 2002 09:54:18:687AM | 1020725004 | Brian Labombard | Shot 4 - plasma, again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. About 1.0 mtorr after shot. Looks like the low pressure Penning gauges are having trouble today. CB_DivL looks ok. Next shot: Start puff/flap program |
| Jul 25 2002 10:17:04:800AM | 1020725005 | Brian Labombard | Shot 5 - plasma, again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. NINJA: 699 torr D2, puff through C-B Bot capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Nice Data: We got the CB_DivL Penning gauge recording pressure changes under the flapper for two cycles starting at 1.2 seconds |
| Jul 25 2002 10:36:54:613AM | 1020725006 | Brian Labombard | Shot 6 - plasma, again Ip ramping down to 0 at 1.12 sec, TF flat to 1.9 sec. NINJA: 674 torr D2, puff through B-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec B-bottom MKS just records a constant pressure rise, independent of flap open/close Next shot: go to full length, NL04 = 1 discharge Flapping and puffing through AB Lim |
| Jul 25 2002 10:52:34:120AM | 1020725007 | Brian Labombard | Shot 7 - Full length plasma, NL04 1 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 80 mtorr on CB_DivL Next shot: lower density |
| Jul 25 2002 11:07:47:880AM | 1020725008 | Brian Labombard | Shot 8 - Full length plasma, NL04 0.8 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.2 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 48 mtorr on CB_DivL when flaps close Next shot: lower density still |
| Jul 25 2002 11:22:34:200AM | 1020725009 | Brian Labombard | Shot 9 - Full length plasma, NL04 0.75 and ramping slightly. NINJA: 663 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure goes to 46 mtorr on CB_DivL when flaps close Next shot: Start NINJA puffs |
| Jul 25 2002 11:45:03:390AM | 1020725010 | Brian Labombard | Shot 10 - Full length plasma, NL04 0.75 and ramping slightly. NINJA: 663 torr D2, puff through B-C Bot capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec CB_DivL pressure goes to 83 mtorr with flapper closed and up to 47 mtorr with flap open. Next shot puff from B-Bottom |
| Jul 25 2002 11:58:08:830AM | 1020725011 | Brian Labombard | Shot 11 - NINJA: 663 torr D2, puff through B-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Slight increase in pressure on B-Bottom Next shot puff through E-bottom cap. |
| Jul 25 2002 12:17:40:207PM | 1020725012 | Brian Labombard | Shot 12 - NINJA: 624 torr D2, puff through E-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Increase in pressure on E-Bottom. Second puff should allow us to calibrate the vacuum conductance. Next shot puff through E-top cap. |
| Jul 25 2002 12:44:05:467PM | 1020725013 | Brian Labombard | Shot 13 - NINJA: 624 torr D2, puff through E-Top capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Increase in pressure on E-Top. Again, second puff should allow us to calibrate the vacuum conductance. Next shot puff through B-C bottom cap. |
| Jul 25 2002 12:45:55:390PM | 1020725014 | Brian Labombard | Shot 14 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 624 torr D2, puff through E-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Pressure rises to 80+ mtorr on CB_DivL Next shot puff through AB Lim cap. for baseline. |
| Jul 25 2002 12:53:50:620PM | 1020725015 | Brian Labombard | Shot 15 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 624 torr D2, puff through E-Bottom capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.8 sec Flaps: C-divertor, 0.2 open/ 0.2 close, 4 cycles starting from 0.4 sec Good baseline shot. Next shot puff through C-D capillary, no flaps. |
| Jul 25 2002 01:13:35:150PM | 1020725016 | Brian Labombard | Shot 16 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through C-D capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec No Flaps Clearly seen on divertor camera. Next shot puff through B-C capillary, no flaps. |
| Jul 25 2002 01:35:46:437PM | 1020725017 | Brian Labombard | Shot 17 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec No Flaps Clearly seen on divertor camera. Next shot puff through B-C capillary, with flap opening 0.6 to 0.9 sec |
| Jul 25 2002 02:00:50:160PM | 1020725018 | Brian Labombard | Shot 18 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 2119 torr D2, puff through B-C Bot capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor open from 0.6 to 0.9 sec Clearly seen on divertor camera. CB_DivL saturates at 87 mtorr. Next shot: puff then flap at B-C |
| Jul 25 2002 02:25:25:260PM | 1020725019 | Brian Labombard | Shot 19 - ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 1368 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor 0.2s open/ 0.2s closed starting at 0.8 sec for 3 cycles CB_DviL records 40/30 mtorr for flap closed/open Unfortunately, the camera systems had a computer problem - no camera data. Next shot, repeat. |
| Jul 25 2002 02:40:02:253PM | 1020725020 | Brian Labombard | Shot 20 - Repeat of shot 19, without camera operating TCI died. Gas feedback went crazy. ASP and FSP scanning 0.8, 1.0, 1.2 seconds NINJA: 1368 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration 0.1 sec, Trig2: 2.7 sec, duration 0.1 sec Flap: C-divertor 0.2s open/ 0.2s closed starting at 0.8 sec for 3 cycles Next shot, go to upper x-point discharges while camera system is being fixed. |
| Jul 25 2002 03:22:07:160PM | 1020725023 | Brian Labombard | Shot 23 - Upper x-point discharge No ASP and FSP NINJA: 690 torr D2, puff through AB Lim capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.81 sec E-top pressure goes to 24 mtorr at 1 sec. Next shot: puff from E-top cap. |
| Jul 25 2002 03:38:13:623PM | 1020725024 | Brian Labombard | Shot 24 - Upper x-point discharge ASP scanning at 0.8, 1.0, 1.2 sec NINJA: 690 torr D2, puff through E-top capillary Trig1: 0.2 sec, duration 1.8 sec, Trig2: 2.7 sec, duration 1.81 sec E-top pressure now goes to 34 mtorr at 1 sec. This should allow us to get the effective conductance. Next shot: Redo shot 19 with cameras operating |
| Jul 25 2002 04:00:24:923PM | 1020725025 | Brian Labombard | Shot 25 - Repeat of shot 19 ASP scanning at 0.8, 1.0, 1.2 sec NINJA: 1339 torr D2, puff through B-C Flap capillary Trig1: 0.5 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: C-divertor 0.2 open/0.2 closed starting at 0.8 sec for 3 cycles Puff and flap is seen on divertor camera. Next shot: repeat with different timing on puff and flap |
| Jul 25 2002 04:15:15:493PM | 1020725026 | Brian Labombard | Shot 26 - ASP and FSP scanning at 0.5, 1.0, 1.2 sec NINJA: 1339 torr D2, puff through B-C Flap capillary Trig1: 0.4 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: C-divertor 0.2 open/ 0.2 closed starting at 0.9 sec for 3 cycles Puff and flap is seen on divertor camera - very nice data. Next shot: repeat with ASP and FSP scanning at 0.6 sec. |
| Jul 25 2002 05:27:27:947PM | 1020725030 | Brian Labombard | Shot 30 - ASP and FSP scanning at 0.6, 1.0, 1.2 sec NINJA: 1329 torr D2, puff through B-C Flap capillary Trig1: 0.4 sec, duration .15 sec, Trig2: 2.7 sec, duration .15 sec Flap: D-divertor 0.2 open/ 0.2 closed starting at 0.9 sec for 3 cycles Puff and flap is seen on divertor camera. The flow through the C-D flapper is much less than the puff, unlike on C-B flap. |
| Physics Operator Comments | |||
| Jul 25 2002 09:03:54:640AM | Ian Hutchinson | Mini Proposal 313 Instrumented Divertor Leakage Experiments. PO Hutch SL Labombard Cold Start. rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds Start from shot 1020723008 Shorten to .8s Set density to .6 | |
| Jul 25 2002 09:20:39:353AM | 1020725001 | Ian Hutchinson | Fizzle. Import segment one from 1020724016. Its br offset is .002 cf .0015 of the previous. ICEF4 is -1310. |
| Jul 25 2002 09:34:44:610AM | 1020725002 | Ian Hutchinson | Plasma ramps down at .8s all the way, terminating at 1.24s. TF on till 1.9s Lower NL04 to 4 from 6. Ramp current down faster. |
| Jul 25 2002 09:46:06:097AM | 1020725003 | Ian Hutchinson | Plasma. Terminates at 1.13s. Had a gas puff near the shot end. Program density to ramp down to prevent ending gas puff. |
| Jul 25 2002 10:02:10:810AM | 1020725004 | Ian Hutchinson | Plasma Add OH2L point at about 1.5 to give 25V trying to reverse swing the OH2 so that we keep the coax resistance down. REMEMBER TO REMOVE IT! |
| Jul 25 2002 10:19:07:367AM | 1020725005 | Ian Hutchinson | Plasma. Big injection at 0.09s, but it recovers. Boswell reports that the injection on shot 4 at .32s has strong Calcium lines. |
| Jul 25 2002 10:46:01:597AM | 1020725006 | Ian Hutchinson | Plasma. TRAQ2 partially screwed. Load segment 2 from 1020723008 TF invert to 1.6. Load. |
| Jul 25 2002 10:52:23:340AM | 1020725007 | Ian Hutchinson | Plasma. Rather a big puff. nl04 to .8 |
| Jul 25 2002 11:08:22:223AM | 1020725008 | Ian Hutchinson | Plasma. Move density feedback P off to 1.5s. nl04 to .7 |
| Jul 25 2002 11:28:12:083AM | 1020725009 | Ian Hutchinson | Plasma. No physop changes. |
| Jul 25 2002 11:45:47:017AM | 1020725010 | Ian Hutchinson | Plasma Loaded segment 2 of 1001006008 into segment 3. (No changes to actual plasma control). |
| Jul 25 2002 12:01:13:680PM | 1020725011 | Ian Hutchinson | Plasma. |
| Jul 25 2002 12:33:40:073PM | 1020725012 | Ian Hutchinson | Plasma. |
| Jul 25 2002 12:41:06:337PM | 1020725013 | Ian Hutchinson | Plasma. |
| Jul 25 2002 12:41:13:240PM | 1020725014 | Ian Hutchinson | Plasma |
| Jul 25 2002 12:46:08:327PM | 1020725015 | Ian Hutchinson | Plasma. |
| Jul 25 2002 01:17:11:670PM | 1020725016 | Ian Hutchinson | Plasma. |
| Jul 25 2002 01:39:33:020PM | 1020725017 | Ian Hutchinson | PLasma |
| Jul 25 2002 02:09:12:877PM | 1020725018 | Ian Hutchinson | Plasma |
| Jul 25 2002 02:09:19:893PM | 1020725019 | Ian Hutchinson | Plasma. |
| Jul 25 2002 02:29:48:207PM | 1020725020 | Ian Hutchinson | Plasma. Interferometer broke and caused wild gas puffs from nl04 feedback. |
| Jul 25 2002 02:57:46:873PM | 1020725021 | Ian Hutchinson | For this shot we switched to segment 3. This should be an upper x-point equilibrium. Set nl04 to 1.e20. Plasma till 1.47s This is not an upper null contrary to advertizing. We got a very strange marfe-like behaviour in the top of the machine and the density rose very high. It turns out we need segment 3 from that shot. 1001006008. Load segment. Call predictors. Set TF to 150000. |
| Jul 25 2002 03:13:48:227PM | 1020725022 | Ian Hutchinson | Fizzle. Br bounced up. Br offset to .0017 from .002 |
| Jul 25 2002 03:28:53:530PM | 1020725023 | Ian Hutchinson | Plasma. Got upper x-point. Late in shot a marfe in the bottom. |
| Jul 25 2002 03:43:22:960PM | 1020725024 | Ian Hutchinson | Plasma. Brian is satisfied with this shot puffing at the top. Switch back to segment 2. |
| Jul 25 2002 04:01:56:003PM | 1020725025 | Ian Hutchinson | Plasma. |
| Jul 25 2002 04:17:05:120PM | 1020725026 | Ian Hutchinson | Plasma |
| Jul 25 2002 04:28:14:683PM | 1020725027 | Ian Hutchinson | Fizzle. |
| Jul 25 2002 04:42:17:160PM | 1020725028 | Ian Hutchinson | Dud. Br offset to .002. |
| Jul 25 2002 04:56:08:540PM | 1020725029 | Ian Hutchinson | Dud 5 min of ECDC. |
| Jul 25 2002 05:06:07:790PM | 1020725030 | Ian Hutchinson | Enter init at 1.2e-6 base pressure. Plasma. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:51:263AM | Plasma | Ok | |
| 2 | 09:19:50:370AM | Plasma | Ok | |
| 3 | 09:33:19:687AM | Plasma | Ok | |
| 4 | 09:46:12:427AM | Plasma | Ok | |
| 5 | 10:02:30:997AM | Plasma | Ok | |
| 6 | 10:16:28:253AM | Plasma | Ok | |
| 7 | 10:36:35:033AM | Plasma | Ok | |
| 8 | 10:50:24:600AM | Plasma | Ok | |
| 9 | 11:06:25:283AM | Plasma | Ok | |
| 10 | 11:26:46:487AM | Plasma | Ok | |
| 11 | 11:46:05:453AM | Plasma | Ok | |
| 12 | 12:00:17:773PM | Plasma | Ok | |
| 13 | 12:17:01:500PM | Plasma | Ok | |
| 14 | 12:30:53:367PM | Plasma | Ok | |
| 15 | 12:44:00:607PM | Plasma | Ok | |
| 16 | 12:57:14:547PM | Plasma | Ok | |
| 17 | 01:13:55:260PM | Plasma | Ok | |
| 18 | 01:36:59:813PM | Plasma | Ok | |
| 19 | 02:05:32:670PM | Plasma | Ok | |
| 20 | 02:19:31:237PM | Plasma | Ok | |
| 21 | 02:42:18:163PM | Plasma | Ok | |
| 22 | 02:58:49:063PM | Plasma | Ok | |
| 23 | 03:12:06:003PM | Plasma | Ok | |
| 24 | 03:27:02:683PM | Plasma | Ok | |
| 25 | 03:42:06:113PM | Plasma | Ok | |
| 26 | 03:58:13:810PM | Plasma | Ok | |
| 27 | 04:13:31:660PM | Plasma | Ok | |
| 28 | 04:27:02:200PM | Plasma | Ok | |
| 29 | 04:40:07:123PM | Plasma | Ok | |
| 30 | 05:04:11:943PM | Plasma | Ok | |