| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Unknown |
| Physics operator(s): | Steve Wolfe,Robert Granetz,Ian Hutchinson |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| Reverse Field startup/Hutch/Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:10:177PM |
| Author: To Be Determined |
| Physop Summary 000330 Hutch (wolfe, granetz). _______________________________________________ Restart Plasma operations. Establish Robust Startup with Abnormal Bt. Summary _______ Good progress. We seem to have a reasonably robust startup. Shot 22 onward. But the plasma is very dirty and radiative, so it is hard to be certain. We are using quite a slow Bz ramp in the first 20ms, probably if we clean the machine up this will have to be increased. Systems ran much more reliably today that the last couple of days. Things learned today. ____________________ It is feasible to run the Br on line 4 which has an integrator. Applying an integral gain of 4 does not break anything. Wolfe points out that this line is referenced to Ip. However since Br demand is always zero this makes no difference (at all since even the Ip drift is multiplied by zero). An offset difference of about 2.5mT exists between this line and line 7. A new scope user10:[hutch.mds.scopes]init_current.dat now calculates the ratio of Ip to Bz. For good initiation, a value of about (3. to 4.)e6 (A/T) is required for equilibrium. Good prompt breakdown is obtained with a fill of .05mtorr at present. This low value is useful for keeping down the CII in a dirty machine. Feedback control on Zcur is now starting earlier without a problem. Only one plasma over 1.s duration (7) was obtained. Many plasmas terminated because of radiation at about .4s. Raising nl04 did not help. H/D ratio was very (ridiculously?) high. Score Card __________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.000 0.047 2 0.367 0.820 3 0.000 0.029 4 0.000 0.058 5 0.885 0.849 6 0.000 0.026 7 1.525 0.851 8 0.000 0.027 9 0.000 0.029 10 0.000 0.024 11 0.000 0.029 12 0.000 0.029 13 0.378 0.763 14 0.000 0.029 15 0.317 0.755 16 0.000 0.029 17 0.436 0.815 18 0.000 0.027 19 0.470 0.875 20 0.000 0.027 21 0.329 0.774 22 0.446 0.818 23 0.478 0.872 24 0.000 0.034 25 0.358 0.774 26 0.425 0.784 Finished summary for 1000330 Total of 26 shots. 26 shots. 12 plasmas. 13 fizzles. 1 duds. Details _______ Entry display output on Thu Mar 30 17:06:33 2000 ---------------------------------------------------------------------------- 1000330xxx wolfe PHYSICS_OPERATOR Mar 30 2000 7:42:23:263AM . . . . . . . . . . . . . . . . . . . . I'll be starting off the run until Ian gets back. ECDC ran all night, just turned off. 7:40 do a coldstart- all matrices respond; hloader server log ok ---------------------------------------------------------------------------- 1000330001 wolfe PHYSICS_OPERATOR Mar 30 2000 9:07:17:093AM . . . . . . . . . . . . . . . . . . . . shot#1: No changes from 1000329011 fizzle. looks like an early runaway burst? Bz0 is a little too positive, gas is low (.065) Next shot: increase pre-puff from 20->22msec IC_EF4 from 1315->1300. ---------------------------------------------------------------------------- 1000330002 wolfe PHYSICS_OPERATOR Mar 30 2000 9:25:22:856AM . . . . . . . . . . . . . . . . . . . . shot#2: increase pre-puff from 20->22msec IC_EF4 from 1315->1300. plasma to .36sec, got to 800ka, hards are gone CII is down to .004, Interferometer cut out at .2sec, gas on full at .27 Murray back into cell to work on it. Next shot: no changes ---------------------------------------------------------------------------- 1000330003 wolfe PHYSICS_OPERATOR Mar 30 2000 9:58:53:280AM . . . . . . . . . . . . . . . . . . . . shot#3: no changes; Rick says TCI looks ok "for now". If we need to change over to z-meter, a recent shot with nl_zmeter was 991112014 (wire 14, seg2) fizzle. CII to .008, bounce at .015sec Br is just a touch positive. Next shot: BR0 from 0.->-.0005 ---------------------------------------------------------------------------- 1000330004 wolfe PHYSICS_OPERATOR Mar 30 2000 10:03:54:250AM . . . . . . . . . . . . . . . . . . . . shot#4: BR0 from 0.->-.0005 fizzle. Ian taking over as physop for shot 5 ---------------------------------------------------------------------------- 1000330004 hutch PHYSICS_OPERATOR Mar 30 2000 10:17:31:843AM . . . . . . . . . . . . . . . . . . . . 50kA, lost upwards. Br offset to +.5mT ---------------------------------------------------------------------------- 1000330005 hutch PHYSICS_OPERATOR Mar 30 2000 10:43:22:106AM . . . . . . . . . . . . . . . . . . . . Plasma till .88s. Seems to be injections. LANL camera shows a flame-thrower effect apparently from the BN antenna. Seems a very nice initiation but with Br reading +1mT. CII.005 Move slow-Zcur start to 25ms, proportional to 30ms. ---------------------------------------------------------------------------- 1000330006 hutch PHYSICS_OPERATOR Mar 30 2000 11:02:35:250AM . . . . . . . . . . . . . . . . . . . . Fizzle. CII=.011. Br offset to 0. Back off on EF3 at 10ms, to 2500V. ---------------------------------------------------------------------------- 1000330007 hutch PHYSICS_OPERATOR Mar 30 2000 11:20:23:296AM . . . . . . . . . . . . . . . . . . . . Plasma for 1.5s. Runaways reported. EF1U railed at 5000. Sharkfin leads to terminal disruption. But prior to that there are signs of clean up. Initiation current rise rate is slower, Bz has drifted slightly more negative. CII=.0075. Move slow-zcur to 20ms. ---------------------------------------------------------------------------- 1000330008 hutch PHYSICS_OPERATOR Mar 30 2000 11:39:20:683AM . . . . . . . . . . . . . . . . . . . . Fizzle. CII .015, pressure rises on flash. Z-meter to .25. Br has drifted down slightly. Chopper start ramp to 30ms. Br offset to .0005. Move end of Ip flat-top to 1.3s. ---------------------------------------------------------------------------- 1000330009 hutch PHYSICS_OPERATOR Mar 30 2000 11:51:48:810AM . . . . . . . . . . . . . . . . . . . . Fizzle. Bz has drifted down some more. CII=.02 Load wire 4 (unused), from 7 (Br) This is a channel with an integrator A. Set integrator A in segment 1 to be on from -.2 to 1. s. EF4 to 1305 from 1300A. Zero 07. !!!**** I have moved the Br controller in segment 1 to wire 4 ****!!! The intention is to have an integrator available. At the moment it is on but zeroed. We need to have a shot to see offsets. ---------------------------------------------------------------------------- 1000330010 hutch PHYSICS_OPERATOR Mar 30 2000 12:05:13:046PM . . . . . . . . . . . . . . . . . . . . Dud. Br is 3.7mT positive. Br offset to -2.5 mT, from +.5mT ---------------------------------------------------------------------------- 1000330011 hutch PHYSICS_OPERATOR Mar 30 2000 12:35:19:216PM . . . . . . . . . . . . . . . . . . . . Fizzle. CII=.017 Put integral gain on Br from -.12s to .05s amplitude .5. EF3V to 2400 at 10ms 2500 at 12 ms. ---------------------------------------------------------------------------- 1000330012 hutch PHYSICS_OPERATOR Mar 30 2000 12:52:02:013PM . . . . . . . . . . . . . . . . . . . . Fizzle. Practically no change. CII=.018 Br integral to 2. EF4 to 1310A. ---------------------------------------------------------------------------- 1000330013 hutch PHYSICS_OPERATOR Mar 30 2000 1:15:21:356PM . . . . . . . . . . . . . . . . . . . . Plasma till 0.37s. Rather resistive. CII=.016. Integral Br to 4. ---------------------------------------------------------------------------- 1000330014 hutch PHYSICS_OPERATOR Mar 30 2000 1:30:33:576PM . . . . . . . . . . . . . . . . . . . . Fizzle. EF3V to 2300 at 10ms. ---------------------------------------------------------------------------- 1000330015 hutch PHYSICS_OPERATOR Mar 30 2000 1:49:06:216PM . . . . . . . . . . . . . . . . . . . . Plasma till .3s Lower pulse gas in first 100ms. ---------------------------------------------------------------------------- 1000330016 hutch PHYSICS_OPERATOR Mar 30 2000 2:15:32:826PM . . . . . . . . . . . . . . . . . . . . Fizzle. Granetz taking over for Ian for about the next hour, using Ian's workstation, even though the mouse is right-handed (i.e. these logbook entries are by Granetz). No obvious changes to make. Just take next shot. ---------------------------------------------------------------------------- 1000330017 hutch PHYSICS_OPERATOR Mar 30 2000 2:18:24:436PM . . . . . . . . . . . . . . . . . . . . Plasma until t=0.43 s. Ip/Bz=2.30 MHutch early on. Prad, Vloop rise before disruption. Seems like dirt, just like preceding shots. Next shot: will probably fizzle, but increase nl_04 to 1.0e20 m-2 so that future plasmas may not have as much of an impurity problem. (Granetz) ---------------------------------------------------------------------------- 1000330018 hutch PHYSICS_OPERATOR Mar 30 2000 2:53:20:280PM . . . . . . . . . . . . . . . . . . . . Fizzle. Next shot: no changes. (Granetz) ---------------------------------------------------------------------------- 1000330019 hutch PHYSICS_OPERATOR Mar 30 2000 2:53:05:826PM . . . . . . . . . . . . . . . . . . . . Plasma until t=0.46 s. Density did come up some. Same kind of dirt disruption as on previous shots. Next shot: no changes. It will be a fizzle, no doubt. (Granetz) ---------------------------------------------------------------------------- 1000330020 hutch PHYSICS_OPERATOR Mar 30 2000 3:17:30:140PM . . . . . . . . . . . . . . . . . . . . Fizzle. Hutch Back. EF3V to 2000V at 15ms. ---------------------------------------------------------------------------- 1000330021 hutch PHYSICS_OPERATOR Mar 30 2000 3:30:41:356PM . . . . . . . . . . . . . . . . . . . . Plasma till .33s CII .012 Fill puff to 18 from 22ms. Nl04 to .5e20 in segment 2, plus slowed the ramp. ---------------------------------------------------------------------------- 1000330022 hutch PHYSICS_OPERATOR Mar 30 2000 3:58:04:826PM . . . . . . . . . . . . . . . . . . . . Plasma Till 0.44s Fill pressure is 0.05mtorr. Breakdown at 4.8ms. I anything, rises slightly quicker. No changes ---------------------------------------------------------------------------- 1000330023 hutch PHYSICS_OPERATOR Mar 30 2000 4:19:17:686PM . . . . . . . . . . . . . . . . . . . . Plasma till .47s. Good initiation. Third in a row. CII=.01 Still have major injections. No changes. ---------------------------------------------------------------------------- 1000330024 hutch PHYSICS_OPERATOR Mar 30 2000 4:39:18:780PM . . . . . . . . . . . . . . . . . . . . Fizzle. Close to going. Gas current 16kA. Ip wa slightly higher this shot at 10ms than last. CII=.014. It's possible that was lost upwards. No changes. ---------------------------------------------------------------------------- 1000330025 hutch PHYSICS_OPERATOR Mar 30 2000 4:55:46:000PM . . . . . . . . . . . . . . . . . . . . Plasma till .35s. Brick at .27s. Density stayed under control until the brick. Raise nl04 to 4.5e19 at .2s. ---------------------------------------------------------------------------- 1000330026 hutch PHYSICS_OPERATOR Mar 30 2000 5:06:17:746PM . . . . . . . . . . . . . . . . . . . . Plasma till .4s. A series of injections till it dies. Initiation ok CII=.01 |
| Session Leader Comments |
| Physics Operator Comments | |||
| Mar 30 2000 07:42:23:263AM | Steve Wolfe | I'll be starting off the run until Ian gets back. ECDC ran all night, just turned off. 7:40 do a coldstart- all matrices respond; hloader server log ok | |
| Mar 30 2000 09:07:17:093AM | 1000330001 | Steve Wolfe | shot#1: No changes from 1000329011 fizzle. looks like an early runaway burst? Bz0 is a little too positive, gas is low (.065) Next shot: increase pre-puff from 20->22msec IC_EF4 from 1315->1300. |
| Mar 30 2000 09:25:22:857AM | 1000330002 | Steve Wolfe | shot#2: increase pre-puff from 20->22msec IC_EF4 from 1315->1300. plasma to .36sec, got to 800ka, hards are gone CII is down to .004, Interferometer cut out at .2sec, gas on full at .27 Murray back into cell to work on it. Next shot: no changes |
| Mar 30 2000 09:58:53:280AM | 1000330003 | Steve Wolfe | shot#3: no changes; Rick says TCI looks ok "for now". If we need to change over to z-meter, a recent shot with nl_zmeter was 991112014 (wire 14, seg2) fizzle. CII to .008, bounce at .015sec Br is just a touch positive. Next shot: BR0 from 0.->-.0005 |
| Mar 30 2000 10:03:54:250AM | 1000330004 | Steve Wolfe | shot#4: BR0 from 0.->-.0005 fizzle. Ian taking over as physop for shot 5 |
| Mar 30 2000 10:17:31:843AM | 1000330004 | Ian Hutchinson | 50kA, lost upwards. Br offset to +.5mT |
| Mar 30 2000 10:43:22:107AM | 1000330005 | Ian Hutchinson | Plasma till .88s. Seems to be injections. LANL camera shows a flame-thrower effect apparently from the BN antenna. Seems a very nice initiation but with Br reading +1mT. CII.005 Move slow-Zcur start to 25ms, proportional to 30ms. |
| Mar 30 2000 11:02:35:250AM | 1000330006 | Ian Hutchinson | Fizzle. CII=.011. Br offset to 0. Back off on EF3 at 10ms, to 2500V. |
| Mar 30 2000 11:20:23:297AM | 1000330007 | Ian Hutchinson | Plasma for 1.5s. Runaways reported. EF1U railed at 5000. Sharkfin leads to terminal disruption. But prior to that there are signs of clean up. Initiation current rise rate is slower, Bz has drifted slightly more negative. CII=.0075. Move slow-zcur to 20ms. |
| Mar 30 2000 11:39:20:683AM | 1000330008 | Ian Hutchinson | Fizzle. CII .015, pressure rises on flash. Z-meter to .25. Br has drifted down slightly. Chopper start ramp to 30ms. Br offset to .0005. Move end of Ip flat-top to 1.3s. |
| Mar 30 2000 11:51:48:810AM | 1000330009 | Ian Hutchinson | Fizzle. Bz has drifted down some more. CII=.02 Load wire 4 (unused), from 7 (Br) This is a channel with an integrator A. Set integrator A in segment 1 to be on from -.2 to 1. s. EF4 to 1305 from 1300A. Zero 07. !!!**** I have moved the Br controller in segment 1 to wire 4 ****!!! The intention is to have an integrator available. At the moment it is on but zeroed. We need to have a shot to see offsets. |
| Mar 30 2000 12:05:13:047PM | 1000330010 | Ian Hutchinson | Dud. Br is 3.7mT positive. Br offset to -2.5 mT, from +.5mT |
| Mar 30 2000 12:35:19:217PM | 1000330011 | Ian Hutchinson | Fizzle. CII=.017 Put integral gain on Br from -.12s to .05s amplitude .5. EF3V to 2400 at 10ms 2500 at 12 ms. |
| Mar 30 2000 12:52:02:013PM | 1000330012 | Ian Hutchinson | Fizzle. Practically no change. CII=.018 Br integral to 2. EF4 to 1310A. |
| Mar 30 2000 01:15:21:357PM | 1000330013 | Ian Hutchinson | Plasma till 0.37s. Rather resistive. CII=.016. Integral Br to 4. |
| Mar 30 2000 01:30:33:577PM | 1000330014 | Ian Hutchinson | Fizzle. EF3V to 2300 at 10ms. |
| Mar 30 2000 01:49:06:217PM | 1000330015 | Ian Hutchinson | Plasma till .3s Lower pulse gas in first 100ms. |
| Mar 30 2000 02:15:32:827PM | 1000330016 | Ian Hutchinson | Fizzle. Granetz taking over for Ian for about the next hour, using Ian's workstation, even though the mouse is right-handed (i.e. these logbook entries are by Granetz). No obvious changes to make. Just take next shot. |
| Mar 30 2000 02:18:24:437PM | 1000330017 | Ian Hutchinson | Plasma until t=0.43 s. Ip/Bz=2.30 MHutch early on. Prad, Vloop rise before disruption. Seems like dirt, just like preceding shots. Next shot: will probably fizzle, but increase nl_04 to 1.0e20 m-2 so that future plasmas may not have as much of an impurity problem. (Granetz) |
| Mar 30 2000 02:53:20:280PM | 1000330018 | Ian Hutchinson | Fizzle. Next shot: no changes. (Granetz) |
| Mar 30 2000 02:53:05:827PM | 1000330019 | Ian Hutchinson | Plasma until t=0.46 s. Density did come up some. Same kind of dirt disruption as on previous shots. Next shot: no changes. It will be a fizzle, no doubt. (Granetz) |
| Mar 30 2000 03:17:30:140PM | 1000330020 | Ian Hutchinson | Fizzle. Hutch Back. EF3V to 2000V at 15ms. |
| Mar 30 2000 03:30:41:357PM | 1000330021 | Ian Hutchinson | Plasma till .33s CII .012 Fill puff to 18 from 22ms. Nl04 to .5e20 in segment 2, plus slowed the ramp. |
| Mar 30 2000 03:58:04:827PM | 1000330022 | Ian Hutchinson | Plasma Till 0.44s Fill pressure is 0.05mtorr. Breakdown at 4.8ms. I anything, rises slightly quicker. No changes |
| Mar 30 2000 04:19:17:687PM | 1000330023 | Ian Hutchinson | Plasma till .47s. Good initiation. Third in a row. CII=.01 Still have major injections. No changes. |
| Mar 30 2000 04:39:18:780PM | 1000330024 | Ian Hutchinson | Fizzle. Close to going. Gas current 16kA. Ip wa slightly higher this shot at 10ms than last. CII=.014. It's possible that was lost upwards. No changes. |
| Mar 30 2000 04:55:46:000PM | 1000330025 | Ian Hutchinson | Plasma till .35s. Brick at .27s. Density stayed under control until the brick. Raise nl04 to 4.5e19 at .2s. |
| Mar 30 2000 05:06:17:747PM | 1000330026 | Ian Hutchinson | Plasma till .4s. A series of injections till it dies. Initiation ok CII=.01 |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:57:23:780AM | Plasma | Ok | no faults/fizzel |
| 2 | 09:15:46:857AM | Plasma | Ok | no faults/plasma |
| 3 | 09:49:23:827AM | Plasma | Ok | no faults/fizzel |
| 4 | 10:02:22:140AM | Plasma | Ok | no faults/fizzel |
| 5 | 10:20:52:577AM | Plasma | Ok | no faults/plasma |
| 6 | 10:41:42:280AM | Plasma | Ok | no faults/fizzel |
| 7 | 11:01:13:590AM | Plasma | Ok | no faults/plasma |
| 8 | 11:21:46:983AM | Plasma | Ok | no faults/fizzel |
| 9 | 11:40:34:420AM | Plasma | Ok | no faults/fizzel |
| 10 | 11:56:27:497AM | Plasma | Ok | |
| 11 | 12:13:43:280PM | Plasma | Ok | |
| 12 | 12:31:32:530PM | Plasma | Ok | |
| 13 | 12:50:25:437PM | Plasma | Bad | OH2U,OH2L Comm Flt, OH1 slf pwrd crkt fired |
| 14 | 01:10:13:153PM | Plasma | Ok | |
| 15 | 01:28:22:640PM | Plasma | Ok | |
| 16 | 01:47:30:640PM | Plasma | Ok | |
| 17 | 02:03:37:840PM | Plasma | Ok | |
| 18 | 02:24:29:403PM | Plasma | Ok | |
| 19 | 02:44:19:123PM | Plasma | Ok | No Faults/plasma |
| 20 | 03:02:50:340PM | Plasma | Ok | no faults/ no plasma |
| 21 | 03:21:34:170PM | Plasma | Ok | no faults/ plasma |
| 22 | 03:37:32:623PM | Plasma | Ok | no faults / plasma |
| 23 | 03:56:24:263PM | Plasma | Ok | no faults / plasma |
| 24 | 04:17:45:513PM | Plasma | Ok | No faults / no plasma |
| 25 | 04:38:22:903PM | Plasma | Ok | no faults / plasma |
| 26 | 04:56:47:683PM | Plasma | Ok | OH2 and OH1 faults |