| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Jim Irby |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| Boronization Recovery & RF Conditioning; SL: Irby; PO: Mossessian; EO:De |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:29:397PM |
| Author: To Be Determined |
| Run Summary for 1020716: Boronization Recovery and Rf Conditioning EO: Dekow/Cochran PO: Mossessian SL: Irby The startup reliability was poor today, almost certainly because of the boronization. As Steve Wolfe pointed out, gas from the walls is raising the gas pressure very quickly and ruining the startup. We were also unable to control the density at the 6e19/m^2 level we obtained easily last Friday. However, the few shots we did get indicated that the boronization has done a very good job of reducing the H/(H+D) from 8-10% down to 3-5%. ed that the boronization has done a very good job of reducing the H/(H+D) from 8-10% down to 3-5%. The radiated power as measured by the 2Pi diode SL: Irby The startup reliability was poor today, almost certainly because of the boronization. As Steve Wolfe pointed out, gas from the walls is raising the gas pressure very quickly and ruining the startup. We were also unable to control the density at the 6e19/m^2 level we obtained easily last Friday. However, the few shots we did get indicated that the boronization has done a very good job of reducing the H/(H+D) from 8-10% down to 3-5%. ed that the boronization has done a very good job of reducing the H/(H+D) from 8-10% down to 3-5%. The radiated power as measured by the 2Pi diode SL: Irby The startup reliability was poor today, almost certainly because of the boronization. As Steve Wolfe pointed out, gas from the walls is raising the gas pressure very quickly and ruining the startup. We were also unable to control the density at the 6e19/m^2 level we obtained easily last Friday. However, the few shots we did get indicated that the boronization has done a very good job of reducing the H/(H+D) from 8-10% down to 3-5%. The latest plots of H/(H+D) can be seen at http://www.psfc.mit.edu/people/irby/htod0716.pdf The radiated power as measured by the 2Pi diode was also down considerably; about a factor 2.4. Unfortunately, the boronization also ruined the rf antenna conditioning. So vacuum conditioning will be required again to get them going for tomorrow morning. The first two shots of the day were no power cycle tests to check out the new ratiomatic controller at g-side, and to verify that the pressure from the pre-puff was similar to shot 18 from last Friday. The new controller is working well (though with a minor restart problem) and the calibration was correct. On shots 04 and 05 we had no OH1 because of a timer reset problem. Shot 06 was a no power test of the OH1 timer. Shot 08 had no EF4 --- enable had been toggled off by accident We lost 2:45 hours between shot 9 and 10 fixing a problem with the cryo system. Duds Fizzles 03,07,10,11,14,16,18,19 Plasmas 09,12,13,15,17 Eng Faults 04,05,08 Tests 01,02,06 |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:15:317PM |
| Author: To Be Determined |
| Physop summary for run of Tuesday, July 16 Goal - post boronization recovery and RF conditionning SL Irby PO Mossessian Summary: Notwithstanding several power supply and cooling problems (see SL logbook entries) we had a few good plasmas. Generally, the startup was not very reliable, as expected after boronization, but we managed to obtain a series of alternating plasma/fizzle discharges without changing the startup traces - time histories of Bz, BR, and Ip were virtually indistinguishable in good plasmas and fizzles. We had total of 19 shots, among which: 4 tests 3 power supplies failures 8 fizzles 4 plasmas Details follow: ---------------------------------------------------------------------------- 1020716003 mossessian PHYSICS_OPERATOR Jul 16 2002 9:13:55:290AM . . . . . . . . . . . . . . . . . . . . 9:10 Loaded 1020712018. Coldstart OK First two shots were no power tests. Goal - post boronization recovery and RF conditionning ----------------------------------------------------------------------------- 1020716003 mossessian PHYSICS_OPERATOR Jul 16 2002 9:25:37:496AM . . . . . . . . . . . . . . . . . . . . Fizzle. Next shot - try to play with Bz: IC_EF4 -1320 -> -1310 ----------------------------------------------------------------------------- 1020716004 mossessian PHYSICS_OPERATOR Jul 16 2002 9:49:08:193AM . . . . . . . . . . . . . . . . . . . . No plasma. OH1 problems. Next shot - no changes ----------------------------------------------------------------------------- 1020716005 mossessian PHYSICS_OPERATOR Jul 16 2002 10:05:26:243AM . . . . . . . . . . . . . . . . . . . . No plasma. OH1 problems again Diagnosed a timer problem. Next shot - no power test. ----------------------------------------------------------------------------- 1020716006 mossessian PHYSICS_OPERATOR Jul 16 2002 10:15:10:993AM . . . . . . . . . . . . . . . . . . . . OH test looks OK now. Try for plasma shot ----------------------------------------------------------------------------- 1020716007 mossessian PHYSICS_OPERATOR Jul 16 2002 10:46:11:590AM . . . . . . . . . . . . . . . . . . . . Fizzle Next shot - Bz down -1310 -> -1320, gas down 23 ms -> 21 ms ----------------------------------------------------------------------------- 1020716008 mossessian PHYSICS_OPERATOR Jul 16 2002 1:59:27:013PM . . . . . . . . . . . . . . . . . . . . No plasma. No EF4 ----------------------------------------------------------------------------- 1020716009 mossessian PHYSICS_OPERATOR Jul 16 2002 2:00:02:013PM . . . . . . . . . . . . . . . . . . . . Plasma Next shot - no changes ----------------------------------------------------------------------------- 1020716010 mossessian PHYSICS_OPERATOR Jul 16 2002 2:01:02:170PM . . . . . . . . . . . . . . . . . . . . Fizzle. Bz drifted down. For next shot IC_EF4 -1320 -> -1310 ----------------------------------------------------------------------------- 1020716011 mossessian PHYSICS_OPERATOR Jul 16 2002 2:25:37:380PM . . . . . . . . . . . . . . . . . . . . Fizzle. Bz a little too high, Br a little too low. For next shot - drop Bz -1310 -> -1320, Br up 0.5 (offset 0.001 -> 0.0015) mT, gas down 21 -> 20 ms ----------------------------------------------------------------------------- 1020716013 mossessian PHYSICS_OPERATOR Jul 16 2002 3:02:29:530PM . . . . . . . . . . . . . . . . . . . . Plasma. For next shot - target density to 1e20 ----------------------------------------------------------------------------- 1020716014 mossessian PHYSICS_OPERATOR Jul 16 2002 3:23:27:026PM . . . . . . . . . . . . . . . . . . . . Fizzle. Bz jumped up. Next shot - no changes ----------------------------------------------------------------------------- 1020716015 mossessian PHYSICS_OPERATOR Jul 16 2002 4:04:21:213PM . . . . . . . . . . . . . . . . . . . . PLasma Next shot - no changes ----------------------------------------------------------------------------- 1020716016 mossessian PHYSICS_OPERATOR Jul 16 2002 4:04:39:933PM . . . . . . . . . . . . . . . . . . . . Fizzle Next shot - no changes ----------------------------------------------------------------------------- 1020716017 mossessian PHYSICS_OPERATOR Jul 16 2002 4:23:05:710PM . . . . . . . . . . . . . . . . . . . . Plasma Next shot - no changes ----------------------------------------------------------------------------- 1020716018 mossessian PHYSICS_OPERATOR Jul 16 2002 5:03:31:743PM . . . . . . . . . . . . . . . . . . . . Fizzle. Bz, Br and ip traces are virtually indistinguishable from shot 17 (plasma) untill current starts going down. Therefore: Next shot - no changes ----------------------------------------------------------------------------- 1020716019 mossessian PHYSICS_OPERATOR Jul 16 2002 5:04:16:836PM . . . . . . . . . . . . . . . . . . . . Fizzle Last shot |
| Session Leader Comments | |||
| Jul 16 2002 08:22:08:647AM | 1020716001 | Jim Irby | Test shot to see if data system is okay, and check pressure calibration on new ratiomatic at g-side. New controller was not on. Next shot... |
| Jul 16 2002 08:23:09:837AM | 1020716002 | Jim Irby | Calibration for G-side looks good: With setup from 1020712018 we got a very similar prepuff. |
| Jul 16 2002 09:24:13:930AM | 1020716003 | Jim Irby | Fizzle at 45 kA CII very low at .001 Bz0 may be a little too negative |
| Jul 16 2002 09:49:10:460AM | 1020716004 | Jim Irby | Dmitri adjusted EF4 +10 amps Dud --------- no OH1?? |
| Jul 16 2002 10:22:19:450AM | 1020716005 | Jim Irby | Try again. No OH1 again... Debug time Power systems group finds an OH1 timer that was hung |
| Jul 16 2002 10:57:41:640AM | 1020716008 | Jim Irby | No EF4?? |
| Jul 16 2002 12:53:40:433PM | 1020716009 | Jim Irby | No ECDC before shot Terminated hard X-ray detector with 1k. Still going directly into camac. Adjusted CO2 laser PZT to avoid having a reset (from 120 to 682 volts) Trying for plasma again Plasma for 1.94 s Still very low CII H/D 4.2% ---- it's good to boronize Hard x-ray signal looks much better with 1k term --- very little offset --- much cleaner signal 2PI diode signal down a factor of two or three |
| Jul 16 2002 02:19:53:013PM | 1020716010 | Jim Irby | We had to delay the run to fix the CRYO system PLC --- the sump was filled about 15" higher than it should have been when the we lost the common to the PLC module. 2 hours 40 minutes later we try for plasma: No ECDC Fizzle CII up to .002 |
| Jul 16 2002 02:25:47:320PM | 1020716011 | Jim Irby | Fizzle --- but barely CII very low, but also very low NL04. Bz0 +.5 mT |
| Jul 16 2002 02:59:34:230PM | 1020716012 | Jim Irby | 5 minutes of ECDC Plasma into rampdown CII very low H/D 4.7% at 1 s |
| Jul 16 2002 03:27:32:190PM | 1020716013 | Jim Irby | 5 minutes of ECDC before shot Plasma to rampdown H/D 3% at 1s but signal level is low: variation 3 to 5% during flattop The next shot we will up the density request to 1.e20/m^2 to improve signal level and check scaling with density Note that NL04 is still exceeding the request of 6e19/m^2 Beginning to see some power out of 1,3, and 4... |
| Jul 16 2002 03:27:58:940PM | 1020716014 | Jim Irby | 5 minutes of ECDC before shot Density request to 1.e20 /m^2 Fizzle --- no clear reason |
| Jul 16 2002 04:02:41:087PM | 1020716015 | Jim Irby | 5 minutes of ECDC Plasma into rampdown Got density request of 1e20/m^2 H/D 2.5 to 3.5% --- still low signal level --- a good thing I guess |
| Jul 16 2002 04:28:04:017PM | 1020716016 | Jim Irby | Fizzle |
| Jul 16 2002 05:49:24:470PM | 1020716017 | Jim Irby | Plasma into rampdown H/D 3% to 4% |
| Jul 16 2002 05:49:42:377PM | 1020716018 | Jim Irby | Fizzle |
| Jul 16 2002 05:49:55:890PM | 1020716019 | Jim Irby | Fizzle |
| Physics Operator Comments | |||
| Jul 16 2002 09:13:55:290AM | 1020716003 | Dmitri Mossessian | 9:10 Loaded 1020712018. Coldstart OK First two shots were no power tests. Goal - post boronization recovery and RF conditionning |
| Jul 16 2002 09:25:37:497AM | 1020716003 | Dmitri Mossessian | Fizzle. Next shot - try to play with Bz: IC_EF4 -1320 -> -1310 |
| Jul 16 2002 09:49:08:193AM | 1020716004 | Dmitri Mossessian | No plasma. OH1 problems. Next shot - no changes |
| Jul 16 2002 10:05:26:243AM | 1020716005 | Dmitri Mossessian | No plasma. OH1 problems again Diagnosed a timer problem. Next shot - no power test. |
| Jul 16 2002 10:15:10:993AM | 1020716006 | Dmitri Mossessian | OH test looks OK now. Try for plasma shot |
| Jul 16 2002 10:46:11:590AM | 1020716007 | Dmitri Mossessian | Fizzle Next shot - Bz down -1310 -> -1320, gas down 23 ms -> 21 ms |
| Jul 16 2002 01:59:27:013PM | 1020716008 | Dmitri Mossessian | No plasma. No EF4 |
| Jul 16 2002 02:00:02:013PM | 1020716009 | Dmitri Mossessian | Plasma Next shot - no changes |
| Jul 16 2002 02:01:02:170PM | 1020716010 | Dmitri Mossessian | Fizzle. Bz drifted down. For next shot IC_EF4 -1320 -> -1310 |
| Jul 16 2002 02:25:37:380PM | 1020716011 | Dmitri Mossessian | Fizzle. Bz a little too high, Br a little too low. For next shot - drop Bz -1310 -> -1320, Br up 0.5 (offset 0.001 -> 0.0015) mT, gas down 21 -> 20 ms |
| Jul 16 2002 03:02:29:530PM | 1020716013 | Dmitri Mossessian | Plasma. For next shot - target density to 1e20 |
| Jul 16 2002 03:23:27:027PM | 1020716014 | Dmitri Mossessian | Fizzle. Bz jumped up. Next shot - no changes |
| Jul 16 2002 04:04:21:213PM | 1020716015 | Dmitri Mossessian | PLasma Next shot - no changes |
| Jul 16 2002 04:04:39:933PM | 1020716016 | Dmitri Mossessian | Fizzle Next shot - no changes |
| Jul 16 2002 04:23:05:710PM | 1020716017 | Dmitri Mossessian | Plasma Next shot - no changes |
| Jul 16 2002 05:03:31:743PM | 1020716018 | Dmitri Mossessian | Fizzle. Bz, Br and ip traces are virtually indistinguishable from shot 17 (plasma) untill current starts going down. Therefore: Next shot - no changes |
| Jul 16 2002 05:04:16:837PM | 1020716019 | Dmitri Mossessian | Fizzle Last shot |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 07:50:48:690AM | Test | Ok | Cycle and Gas Test |
| 2 | 08:14:19:683AM | Test | Ok | Cycle and Gas Test |
| 3 | 09:12:23:800AM | Plasma | Ok | |
| 4 | 09:36:33:470AM | Plasma | Bad | OH1 didn't Fire |
| 5 | 09:50:42:027AM | Plasma | Bad | OH1 Didn't Fire |
| 6 | 10:11:30:560AM | Test | Ok | OH1 Duty Cycle Timer Worked |
| 7 | 10:31:05:603AM | Plasma | Ok | |
| 8 | 10:48:06:673AM | Plasma | Bad | EF4 accidently disabled |
| 9 | 11:04:12:143AM | Plasma | Ok | |
| 10 | 01:50:05:483PM | Plasma | Ok | |
| 11 | 02:13:25:440PM | Plasma | Ok | |
| 12 | 02:35:02:660PM | Plasma | Ok | |
| 13 | 02:57:47:913PM | Plasma | Ok | |
| 14 | 03:16:13:303PM | Plasma | Ok | |
| 15 | 03:34:42:013PM | Plasma | Ok | |
| 16 | 03:53:35:573PM | Plasma | Ok | |
| 17 | 04:16:12:123PM | Plasma | Ok | |
| 18 | 04:45:19:667PM | Plasma | Ok | |
| 19 | 05:02:47:070PM | Plasma | Ok | |