Miniproposals

Miniproposal: 214 Date Filed: 1/5/1999 Title: D and E-port RF System Commissioning First Author: Steve Wukitch Session Leader: Rejean Boivin (shots 1-27) Session Leader: Steve Wukitch (shots 1-27)

Engineering Operator Run Comment

MP#214 R.F. Conditioning/Hutch, Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Physics Operator Summaries

Entered: Jul 7 2004 04:37:07:927PM

Author: To Be Determined

Physop Summary for 990803 RF conditioning and getting the plasma back. ______________________________________________________________________ Summary ________ The weekend's extensive cleaning gave us a good machine in terms of plasma operation, except that there was a lot of wall fuelling and very little pump out at the end of the shot. The H level was too high for good RF heating even before the RF came on (about 0.3 H/D). The antennas or the RF interaction gave rise to substantial prompt increase in the bolometer, and a systematic increase in H/D to about 0.7. Nevertheless, good progress on RF conditioning and tuning was made. Over 1 MW was obtained from both 3 and 4 separately. Apparently they still won't run well together. The D/E RF seemed to run fairly reliably. In my humble opinion we should boronize as soon as possible so as to get the Hydrogen level down. Various tweaks to the ramp-down were made, with a view to reducing the elongation while still diverted. This was partially successful, but the EF2 currents tend to zero out. Still ramp-downs to <250kA were routinely obtained. Initiation was very reliable except for cases where Br wandered off. Scorecard _________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.000 0.021 2 0.000 0.037 3 1.312 0.761 4 1.566 0.797 5 1.599 0.802 6 0.832 0.799 7 1.610 0.802 8 1.625 0.802 9 1.830 0.812 10 1.716 0.812 11 1.670 0.807 12 1.720 0.807 13 0.000 0.065 14 0.270 0.719 15 1.743 0.802 16 1.747 0.802 17 1.782 0.807 18 1.781 0.807 19 1.820 0.802 20 1.800 0.802 21 1.787 0.802 22 1.794 0.802 23 1.121 0.807 24 1.764 0.807 25 1.763 0.807 26 1.800 0.807 27 1.782 0.802 Finished summary for 990803 Total of 27 shots. 27 shots. 25 plasmas. 1 fizzles. 1 duds. Fizzle = gt 27.0 lt 50kA. Details. -------------------------------------------------------------------------------- 990803xxx hutch PHYSICS_OPERATOR Aug 2 1999 5:09:16:936PM . . . . . . . . . . . . . . . . . . . . Import segment 2 from 990527003. Load into model. -------------------------------------------------------------------------------- 990803xxx wolfe PHYSICS_OPERATOR Aug 3 1999 7:57:47:796AM . . . . . . . . . . . . . . . . . . . . Ian not in yet, so I do a coldstart. First time fails; need to do a REMCAM on Barolo. Redo the coldstart at 7:56 Log file looks ok -------------------------------------------------------------------------------- 990803002 hutch PHYSICS_OPERATOR Aug 3 1999 8:43:49:903AM . . . . . . . . . . . . . . . . . . . . Fizzle. Br too negative by about 2 mT. Carbon .006. Breackdown at 5.4ms. Fast current rise. Br offset was set at .004 set to .0055 -------------------------------------------------------------------------------- 990803003 hutch PHYSICS_OPERATOR Aug 3 1999 9:07:13:593AM . . . . . . . . . . . . . . . . . . . . Plasma to 1.3 seconds. Not quite ramped down. Basically all worked. Very fast current rise. Br=-1mT at t=0. H/D =.15 increasing to .4 Import segment 2 from 990723011. -------------------------------------------------------------------------------- 990803004 hutch PHYSICS_OPERATOR Aug 3 1999 9:20:01:686AM . . . . . . . . . . . . . . . . . . . . Plasma till 1.56s. 1MW RF, which raises the Bolo signal. Resistive/gas-puff event at .4s. H/D reaches .55. Sharkfin at end. Early gas puff V to 55V from 35V. nl04 to 1e20 from 1.1e20. -------------------------------------------------------------------------------- 990803005 hutch PHYSICS_OPERATOR Aug 3 1999 9:41:13:263AM . . . . . . . . . . . . . . . . . . . . Plasma to 1.59s. Very similar to previous shot, but without the gas puff event. H/D = .3 to .5 No changes -------------------------------------------------------------------------------- 990803006 hutch PHYSICS_OPERATOR Aug 3 1999 9:55:14:873AM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at .8s. Big impurity influx and gas pressure rise causes the disruption. RF pleads innocent. No changes. -------------------------------------------------------------------------------- 990803007 hutch PHYSICS_OPERATOR Aug 3 1999 10:14:59:873AM . . . . . . . . . . . . . . . . . . . . Plasma to 1.6s. Hard x-rays. Br jumps up by about 1mT. 1.5MW RF. Lower gas V to 10V from 20V during .5 to 1s. -------------------------------------------------------------------------------- 990803008 hutch PHYSICS_OPERATOR Aug 3 1999 10:39:23:106AM . . . . . . . . . . . . . . . . . . . . Plasma to 1.62s. Br corrects itself. Clearin to -.04 at 1.6s. Run Alternator at slightly lower speed next shot. -------------------------------------------------------------------------------- 990803009 hutch PHYSICS_OPERATOR Aug 3 1999 10:57:28:653AM . . . . . . . . . . . . . . . . . . . . Plasma. Interferometer breaks. Very little gas puff. Plasma ramps down. Thomson density drops from about 1.5 to 1.2e20. About .5MW through J-port. This was at 1750rpm on alternator. No obvious change in initiation. H/D stays just under .4 nl04 to .9 -------------------------------------------------------------------------------- 990803010 hutch PHYSICS_OPERATOR Aug 3 1999 11:22:53:436AM . . . . . . . . . . . . . . . . . . . . Plasma to 1.7s. Alternator at 1700rpm. Initiation ok, although BR and Bz have perhaps dropped slightly. Extend the PCS integrator gate to 2.s. Did not load. -------------------------------------------------------------------------------- 990803011 hutch PHYSICS_OPERATOR Aug 3 1999 11:54:30:356AM . . . . . . . . . . . . . . . . . . . . Plasma. Same old same old. clearin to -.02 in rampdown. Load. -------------------------------------------------------------------------------- 990803012 hutch PHYSICS_OPERATOR Aug 3 1999 12:08:44:983PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.72s. JR reports Mo during RF. Further tweaks to make clearin more positive during ramp down. -------------------------------------------------------------------------------- 990803013 hutch PHYSICS_OPERATOR Aug 3 1999 12:24:06:733PM . . . . . . . . . . . . . . . . . . . . Early death at 70kA. Br too negative. Raise to offset 6 mT. -------------------------------------------------------------------------------- 990803014 hutch PHYSICS_OPERATOR Aug 3 1999 12:41:08:530PM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at .25s owing to a brick. Repeat -------------------------------------------------------------------------------- 990803015 hutch PHYSICS_OPERATOR Aug 3 1999 12:58:02:640PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.74s. Survives some big radiative events early. Repeat. -------------------------------------------------------------------------------- 990803016 hutch PHYSICS_OPERATOR Aug 3 1999 1:24:39:920PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.74 Increase gas puff at 40ms to try to get rid of the radiative events. Further tweaks to the ramp down. -------------------------------------------------------------------------------- 990803017 hutch PHYSICS_OPERATOR Aug 3 1999 1:43:33:436PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.78s. Left RCUR further out during ramp down. Also draw RXL more negative. -------------------------------------------------------------------------------- 990803018 hutch PHYSICS_OPERATOR Aug 3 1999 2:07:00:950PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.78s. 1.7 MW RF with some overlap between J and DE. Increase early gas some more. Tweak rampdown: rcur offset to 5000, zxl/u move in more. ... -------------------------------------------------------------------------------- 990803019 hutch PHYSICS_OPERATOR Aug 3 1999 2:27:33:030PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.82s4 Make Rcur further out in ramp down. -------------------------------------------------------------------------------- 990803020 hutch PHYSICS_OPERATOR Aug 3 1999 2:48:21:140PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.8s. Lower Clearin in ramp down. -------------------------------------------------------------------------------- 990803021 hutch PHYSICS_OPERATOR Aug 3 1999 3:14:34:670PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.78. Tweak rxl and rxu and ef2byef4 to try to prevent EF2 zeroing. Raise early gas some more. -------------------------------------------------------------------------------- 990803022 hutch PHYSICS_OPERATOR Aug 3 1999 3:27:37:653PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.8s. EF4 crossed back over, but just too late. Ramp ICEF4 more rapidly to a negative value in the ramp down. -------------------------------------------------------------------------------- 990803023 hutch PHYSICS_OPERATOR Aug 3 1999 3:50:05:590PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.12s. Disrupts because of a brick. Repeat -------------------------------------------------------------------------------- 990803024 hutch PHYSICS_OPERATOR Aug 3 1999 4:07:49:920PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.76s Increase the ramp rate of zxl and zxu in ramp down. -------------------------------------------------------------------------------- 990803025 hutch PHYSICS_OPERATOR Aug 3 1999 4:35:27:840PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.76s. Becomes upper null during ramp down. Back off zxu ramp rate. Move plasma out slightly. -------------------------------------------------------------------------------- 990803026 hutch PHYSICS_OPERATOR Aug 3 1999 4:48:47:576PM . . . . . . . . . . . . . . . . . . . . Plasma to 1.8s. Sort of ramps down all the way, even thought he EF2s get switched off. Fiddled some more. -------------------------------------------------------------------------------- 990803027 hutch PHYSICS_OPERATOR Aug 3 1999 4:49:49:310PM . . . . . . . . . . . . . . . . . . . . Plasma till 1.77s.

Session Leader Comments
Aug 3 1999 08:05:51:357AM		Rejean Boivin	Run Plan ---- The infamous MP 214 -- the unclosable! Basic PLan 1) Get good plasma 2) Bring 1 and 2 (D and E) at max power, as previously achieved 3) Bring 3 and 4 (J) along and understand its behavior. Plasma will be simple, reproducible, and with some minor tweaks to help bringing up the new antenna. We will monitor H conc, gaps and so forth.
Aug 3 1999 09:21:42:747AM	990803004	Rejean Boivin	RF on for this shot, ramps for D and E, between ~0.5 and 0.8 sec. Went in as programmed, no heating H/D very high. Mostly edge heating. With longer flattop we will bring 3 and 4 in on next shot after D and E.
Aug 3 1999 09:34:19:733AM	990803005	Rejean Boivin	D and E going in with a little more power. J (3 and 4) going in with small amount of power, good ramps at 10s of kW, no faults. Increase power for next shot.
Aug 3 1999 12:46:52:403PM	990803006	Rejean Boivin	D and E going in with a little more power. Shot disrupted before we can get to 3 and 4.
Aug 3 1999 12:47:04:200PM	990803007	Rejean Boivin	Lots of runaways at beginning. D and E going in with a little more power (squaring the waveform). Making some progress with J. #4 went in with ~30 kW, good tune. #3 still has a bad tune.
Aug 3 1999 12:47:19:937PM	990803008	Rejean Boivin	D and E going in with a little more power (squaring the waveform), E tripped, too much asked. J going in a little more...
Aug 3 1999 12:47:42:030PM	990803009	Rejean Boivin	Very low density, tuning too much different for the RF, J3 made good power. D and E going in with a little more power (squaring the waveform), E tripped, too much asked.
Aug 3 1999 12:47:53:733PM	990803010	Rejean Boivin	D and E basically at their maximum. Making some progress on 3 and 4 (J).
Aug 3 1999 12:48:35:623PM	990803011	Rejean Boivin	D and E basically at their maximum. Continuing to ramp up 3 and 4.
Aug 3 1999 12:48:11:780PM	990803012	Rejean Boivin	D and E basically at their maximum. Making a good 500 kW on 4!
Aug 3 1999 01:01:35:123PM	990803015	Rejean Boivin	We are attempting to run 3 and 4 together. Overlap is between 1 and 1.25 sec. #4 being first. Results: not enough power from 3, yet. Otherwise 400 kW from #4.
Aug 3 1999 01:14:44:217PM	990803016	Rejean Boivin	We are attempting to run 3 and 4 together. Overlap is between 1 and 1.25 sec. #4 being first. Results: not enough power from 3, yet. Otherwise 400 kW from #4. Same as 015, #3 resists tuning...
Aug 3 1999 01:35:13:450PM	990803017	Rejean Boivin	Progress made here, D, E and J4 ran together. Getting 3 tuned by itself, not on on this shot (reset missed?).
Aug 3 1999 01:58:13:293PM	990803018	Rejean Boivin	D, E and J4 ran together nicely!!! 1.7 MW total power during that phase. J3 went in at almost 0.5 MW! For individual power look at \RF_power_D \RF_power_E \RF_power_J3 \RF_power_J4 with the net: \RF_power_net
Aug 3 1999 02:18:45:077PM	990803019	Rejean Boivin	D and E overlap with J4, and then J4 overlap a little bit with J3. Lots of crap coming through, cleaning up... ~1MW out of J4!
Aug 3 1999 02:41:13:700PM	990803020	Rejean Boivin	D and E overlap with J4, J4 went to 1.4MW, briefly with a very good tuning (plasma changed briefly) and overloaded. J3 then went unhindered later by itself.
Aug 3 1999 03:25:03:107PM	990803022	Rejean Boivin	D and E overlap with J4, J4 went to 1.4MW, good tuning at times. J3 then went later by itself with 1+ MW.
Aug 3 1999 03:46:33:780PM	990803023	Rejean Boivin	D and E overlap with J4 and J3, between 0.7 and 0.9 sec. J4 went to ~0.8MW. J3 went only to ~0.1 MW programming being lower. Next shot bring up J3 to "match" J4
Aug 3 1999 04:06:58:750PM	990803024	Rejean Boivin	D and E overlap with J4 and J3, between 0.7 and 0.9 sec. J4 went to ~1.0MW. J3 went only to ~0.4 MW. Try again to "match" J3 and J4, with a small time lag for J3, try first (next shot).
Aug 3 1999 04:18:00:230PM	990803025	Rejean Boivin	D and E overlap with J4 and J3, between 0.7 and 1.2 sec. J4 went to ~1.0MW. J3 did not go, arc detector failed to reset before shot.
Aug 3 1999 04:46:15:047PM	990803026	Rejean Boivin	D and E overlap with J4 and J3, between 0.7 and 1.2 sec. J4 went to ~1.0MW. J3 did not go much, arcs.
Aug 3 1999 05:08:57:937PM	990803027	Rejean Boivin	D and E overlap with J4 and J3, J3 went in first, doesn't survive with J4.

Physics Operator Comments
Aug 2 1999 05:09:16:937PM		Ian Hutchinson	Import segment 2 from 990527003. Load into model.
Aug 3 1999 07:57:47:797AM		Steve Wolfe	Ian not in yet, so I do a coldstart. First time fails; need to do a REMCAM on Barolo. Redo the coldstart at 7:56 Log file looks ok
Aug 3 1999 09:20:01:687AM		Ian Hutchinson	Plasma till 1.56s. 1MW RF, which raises the Bolo signal. Resistive/gas-puff event at .4s. H/D reaches .55. Sharkfin at end. Early gas puff V to 55V from 35V. nl04 to 1e20 from 1.1e20.
Aug 3 1999 08:43:49:903AM	990803002	Ian Hutchinson	Fizzle. Br too negative by about 2 mT. Carbon .006. Breackdown at 5.4ms. Fast current rise. Br offset was set at .004 set to .0055
Aug 3 1999 09:07:13:593AM	990803003	Ian Hutchinson	Plasma to 1.3 seconds. Not quite ramped down. Basically all worked. Very fast current rise. Br=-1mT at t=0. H/D =.15 increasing to .4 Import segment 2 from 990723011.
Aug 3 1999 09:41:13:263AM	990803005	Ian Hutchinson	Plasma to 1.59s. Very similar to previous shot, but without the gas puff event. H/D = .3 to .5 No changes
Aug 3 1999 09:55:14:873AM	990803006	Ian Hutchinson	Plasma disrupts at .8s. Big impurity influx and gas pressure rise causes the disruption. RF pleads innocent. No changes.
Aug 3 1999 10:14:59:873AM	990803007	Ian Hutchinson	Plasma to 1.6s. Hard x-rays. Br jumps up by about 1mT. 1.5MW RF. Lower gas V to 10V from 20V during .5 to 1s.
Aug 3 1999 10:39:23:107AM	990803008	Ian Hutchinson	Plasma to 1.62s. Br corrects itself. Clearin to -.04 at 1.6s. Run Alternator at slightly lower speed next shot.
Aug 3 1999 10:57:28:653AM	990803009	Ian Hutchinson	Plasma. Interferometer breaks. Very little gas puff. Plasma ramps down. Thomson density drops from about 1.5 to 1.2e20. About .5MW through J-port. This was at 1750rpm on alternator. No obvious change in initiation. H/D stays just under .4 nl04 to .9
Aug 3 1999 11:22:53:437AM	990803010	Ian Hutchinson	Plasma to 1.7s. Alternator at 1700rpm. Initiation ok, although BR and Bz have perhaps dropped slightly. Extend the PCS integrator gate to 2.s. Did not load.
Aug 3 1999 11:54:30:357AM	990803011	Ian Hutchinson	Plasma. Same old same old. clearin to -.02 in rampdown. Load.
Aug 3 1999 12:08:44:983PM	990803012	Ian Hutchinson	Plasma till 1.72s. JR reports Mo during RF. Further tweaks to make clearin more positive during ramp down.
Aug 3 1999 12:24:06:733PM	990803013	Ian Hutchinson	Early death at 70kA. Br too negative. Raise to offset 6 mT.
Aug 3 1999 12:41:08:530PM	990803014	Ian Hutchinson	Plasma disrupts at .25s owing to a brick. Repeat
Aug 3 1999 12:58:02:640PM	990803015	Ian Hutchinson	Plasma to 1.74s. Survives some big radiative events early. Repeat.
Aug 3 1999 01:24:39:920PM	990803016	Ian Hutchinson	Plasma to 1.74 Increase gas puff at 40ms to try to get rid of the radiative events. Further tweaks to the ramp down.
Aug 3 1999 01:43:33:437PM	990803017	Ian Hutchinson	Plasma to 1.78s. Left RCUR further out during ramp down. Also draw RXL more negative.
Aug 3 1999 02:07:00:950PM	990803018	Ian Hutchinson	Plasma till 1.78s. 1.7 MW RF with some overlap between J and DE. Increase early gas some more. Tweak rampdown: rcur offset to 5000, zxl/u move in more. ...
Aug 3 1999 02:27:33:030PM	990803019	Ian Hutchinson	Plasma to 1.82s4 Make Rcur further out in ramp down.
Aug 3 1999 02:48:21:140PM	990803020	Ian Hutchinson	Plasma till 1.8s. Lower Clearin in ramp down.
Aug 3 1999 03:14:34:670PM	990803021	Ian Hutchinson	Plasma till 1.78. Tweak rxl and rxu and ef2byef4 to try to prevent EF2 zeroing. Raise early gas some more.
Aug 3 1999 03:27:37:653PM	990803022	Ian Hutchinson	Plasma till 1.8s. EF4 crossed back over, but just too late. Ramp ICEF4 more rapidly to a negative value in the ramp down.
Aug 3 1999 03:50:05:590PM	990803023	Ian Hutchinson	Plasma to 1.12s. Disrupts because of a brick. Repeat
Aug 3 1999 04:07:49:920PM	990803024	Ian Hutchinson	Plasma to 1.76s Increase the ramp rate of zxl and zxu in ramp down.
Aug 3 1999 04:35:27:840PM	990803025	Ian Hutchinson	Plasma till 1.76s. Becomes upper null during ramp down. Back off zxu ramp rate. Move plasma out slightly.
Aug 3 1999 04:48:47:577PM	990803026	Ian Hutchinson	Plasma to 1.8s. Sort of ramps down all the way, even thought he EF2s get switched off. Fiddled some more.
Aug 3 1999 04:49:49:310PM	990803027	Ian Hutchinson	Plasma till 1.77s.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:05:19:233AM	Test	Ok	OH coax Resistance test
2	08:35:22:543AM	Plasma	Ok	no faults
3	08:53:18:170AM	Plasma	Ok	no faults
4	09:06:39:093AM	Plasma	Ok	no faults
5	09:20:59:200AM	Plasma	Ok	no faults
6	09:40:52:297AM	Plasma	Ok	no faults
7	09:57:50:357AM	Plasma	Ok	no faults
8	10:16:16:030AM	Plasma	Ok	no faults
9	10:37:03:670AM	Plasma	Ok	no faults
10	11:05:11:187AM	Plasma	Ok	no faults
11	11:23:54:547AM	Plasma	Ok	No faults
12	11:46:57:937AM	Plasma	Ok	no faults
13	12:07:03:310PM	Plasma	Ok	(null)
14	12:22:13:950PM	Plasma	Ok	(null)
15	12:38:15:577PM	Plasma	Ok	(null)
16	12:59:30:340PM	Plasma	Ok	(null)
17	01:20:30:763PM	Plasma	Ok	(null)
18	01:41:53:467PM	Plasma	Ok	(null)
19	02:02:58:450PM	Plasma	Ok	EF1 Conduction Fault , no problems discovered
20	02:25:08:653PM	Plasma	Ok	(null)
21	02:45:02:123PM	Plasma	Ok	(null)
22	03:06:48:827PM	Plasma	Ok	(null)
23	03:28:06:043PM	Plasma	Ok	(null)
24	03:47:29:607PM	Plasma	Ok	(null)
25	04:08:34:170PM	Plasma	Ok	(null)
26	04:28:25:263PM	Plasma	Ok	(null)
27	04:46:41:013PM	Plasma	Ok	(null)