| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Steve Wukitch |
| Physics operator(s): | John Goetz |
| Engineering operator(s): | Vinny Bertolino,Frank Silva,Dave Terry,Bill Cochran |
| Engineering Operator Run Comment |
| mp150a/Terry/Cochran/Bertolino/Goetz |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:06:053PM |
| Author: To Be Determined |
| Beginning MP150A (He3 Minority Heating at 8T) today with the explicit purpose of investigating RF absorption. However, we will probably spend considerable amount of time developing the discharge because this is the first 8T run of the campaign. We will begin with 5.4T discharges to test the TF scanner and move to 8T discharges when this test is completed. In parallel, FMIT#2 will be tested. Although it began to work more regularly yesterday, its instrumentation has developed problems. These will not prevent it from running but it could make it difficult to match. The arc and fault detection system will also be tested. Once the physics run starts, the He3 concentration will be scanned with RF power modulation. 005 plasma disrupted @1.0 sec 006 dud engineering 007 plasma BT=5.4, 1 MA, nel = 1.0 008 plasma BT=6.1, 1 MA 009 dud breaker pull 010 dud breaker pull-->trying for 6.8T 011-013 problems with EF's 014 plasma BT=8T, 1.2 MA both transmitters ran, but separately Developed a problem with the alternator which terminated the run after 014. However, we solved part of the RF arc and fault detection problem and 014 is a good shot from which to start the next 8T run. None of the physics program was begun. |
| Entered: Jul 7 2004 03:49:17:227PM |
| Author: To Be Determined |
| Beginning MP150A (He3 Minority Heating at 8T) today with the explicit purpose of investigating RF absorption. However, we will probably spend considerable amount of time developing the discharge because this is the first 8T run of the campaign. We will begin with 5.4T discharges to test the TF scanner and move to 8T discharges when this test is completed. In parallel, FMIT#2 will be tested. Although it began to work more regularly yesterday, its instrumentation has developed problems. These will not prevent it from running but it could make it difficult to match. The arc and fault detection system will also be tested. Once the physics run starts, the He3 concentration will be scanned with RF power modulation. 005 plasma disrupted @1.0 sec 006 dud engineering 007 plasma BT=5.4, 1 MA, nel = 1.0 008 plasma BT=6.1, 1 MA 009 dud breaker pull 010 dud breaker pull-->trying for 6.8T 011-013 problems with EF's 014 plasma BT=8T, 1.2 MA both transmitters ran, but separately Developed a problem with the alternator which terminated the run after 014. However, we solved part of the RF arc and fault detection problem and 014 is a good shot from which to start the next 8T run. None of the physics program was begun. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:57:863PM |
| Author: To Be Determined |
| Physics operator summary for 970626 EO: Terry/Bertolino/Cochran/Silva PO: Goetz SL: Wukitch Run 970626 was in support of Mini-Proposal #150A - Helium-3 Minority Heating at 8T. The goals for today are to try and run 8T plasmas and optimize the helium-3 minority heating scanario. The goals were not reached today. Plasmas were produced at fields ranging from 5.3 to 8.1T. The problem was, there were not enough of them. See the Session Leader's report for the physics results. Good day for start-up. Four-for-four in startups. Breakdowns occured at around 5msec and were accompanied by current rises with hesitations. Burnouts were slow but this was acceptable today. Started today with 5.3T shots in order to test the TF scanner and then slowly worked up in field reaching 8.1T on shot 14. Wire 10 has been renamed PULSE_GAS5 and is now connected to the J-BOTTOM piezoelectric valve. Using a shot from prior to 970626xxx will require the operator to move a point in the all V's screen [for all segments] in order to pick up the name change. The system was tested to the output of the high voltage op amp and nothing appeared at the low voltage tap of this output, which is digitized in INPUT_05 of the PHA Incaa. Engineering, computing, and diagnostics today: The TF scanner was debugged today and is working acceptably. The EF1U supply began crowbarring before t=0 when the toroidal field was raised. This was ultimately traced to the wrong IOC limits on the first and second directions of the EF1's. This was remedied by changing the setpoints. The alternator suffered through particulate and vibration faults, thus ending the run. The status of the alternator is being investigated. Scorecard: 14 shots = 4 plasmas + 0 fizzles + 4 eng. duds + 6 tests Shot summary for Run 970626: Load 970625003 coldstart hybrid - all matrices respond Shot change result ____ _____ ______ 1 test shot 2 test shot 3 test shot 4 test shot 5 see above plasma; b.d. @ .0055; slight hesitation disrupts @ .97 due to no density feedback; 6 draw [100Vx0.1s] @ .8 on PG5 engineering dud; no OH2's, EF1L, EF2U [output of HV amp not connected] 70min delay for RF CAMAC crate and various other cell things 7 try again plasma; b.d. @ .0055; slight hesitation nice shot 8 TF current to -175kA and start plasma; b.d. @ .0045; slight hesitation time = -1.7s under PLC control; H-modes; heating; EF4 on a current limit IP=-1000000 9 TF current = -195kA; EF4 PLC engineering dud; EF1L out before the shot = [-9.,4.]kA; IP=-1200000; followed by EF1U and OH2's RCUR = .667 10 try again engineering dud; EF1U out first this time 11 TF current = -215kA engineering dud; EF1U out @ -.21; Bt=7.4T 12 EF1 test only EF1 still tripping 13 EF1 test with IOC boards EF1's work flipped for forward-reverse 14 TF current = -231kA plasma; b.d. @ .005; slight hesitation Bt=-8.1T; Ip=-1.2MA; disrupts @ 1.53; particulate and vibration faults in the alternator. End of run. |
| Session Leader Comments | |||
| Jun 26 1997 11:36:37:330AM | Steve Wukitch | Beginning MP150A (He3 Minority Heating at 8T) today with the explicit purpose of investigating RF absorption. However, we will probably spend considerable amount of time developing the discharge because this is the first 8T run of the campaign. We will begin with 5.4T discharges to test the TF scanner and move to 8T discharges when this test is completed. In parallel, FMIT#2 will be tested. Although it began to work more regularly yesterday, its instrumentation has developed problems. These will not prevent it from running but it could make it difficult to match. The arc and fault detection system will also be tested. Once the physics run starts, the He3 concentration will be scanned with RF power modulation. | |
| Jun 26 1997 03:01:17:140PM | Steve Wukitch | Developed a problem with the alternator which terminated the run after 014. However, we solved part of the RF arc and fault detection problem and 014 is a good shot from which to start the next 8T run. None of the physics program was begun. | |
| Jun 26 1997 10:05:07:840AM | 970626005 | Steve Wukitch | plasma disrupted @1.0s RF had crate problems |
| Jun 26 1997 10:12:04:210AM | 970626006 | Steve Wukitch | dud engineering dud |
| Jun 26 1997 11:15:45:640AM | 970626007 | Steve Wukitch | plasma BT=5.4, 1MA FMIT#2 worked with trips and modified instrumentation worked properly |
| Jun 26 1997 11:17:13:130AM | 970626008 | Steve Wukitch | plasma BT=6.1, 1MA FMIT#2 worked with trips at 1.5 MW, FMIT#1 is primarily tripping on phase balance |
| Jun 26 1997 11:35:50:520AM | 970626009 | Steve Wukitch | dud breaker pull |
| Jun 26 1997 11:45:07:900AM | 970626010 | Steve Wukitch | dud breaker pull-->trying for 6.8T |
| Jun 26 1997 03:00:53:890PM | 970626014 | Steve Wukitch | plasma BT=8T, 1.2 MA both transmitters ran, but separately |
| Physics Operator Comments | |||
| Jun 26 1997 08:34:01:920AM | John Goetz | Run 970626 MP 150A -- Optimization of 8T Heating Engineering: Overnight ECDC in deuterium. Engineering setup as on 960905003 Begin with TF under PLC control, although it is possible that hybrid control will be required later in the run Gas setup - fill K-side with 20 PSI of D2, hybrid enable fill B-top with 6 PSI of D2, hybrid enable fill B-side-lower with 4 PSI of Ar, hybrid enable fill B-side-upper with 15 PSI of Helium-3, hybrid enable purge J-bottom The following gate valves should be enabled, assuming no vacuum problems: ECE, PCX, TCX, VUV, MolyMon Physics: Begin with 960905003 which is a 1.2MA, 8T discharge. A systematic scan of helium-3 concentration and density will be performed to try and optimize the minority heating scenario at 8T. RF power absorption data will be obtained using the power modulation technique. | |
| Jun 26 1997 08:35:37:110AM | John Goetz | Run 970626 First 4 shots were tests with no power to check out the TF scanner. The run will begin with 970625003 which is a 5.3T, 1.0MA shot to do the TF scanner tests with power. After that Jim Irby will decide how the run proceeds. | |
| Jun 26 1997 08:37:23:820AM | John Goetz | Run 970626 Wire 10 has been renamed PULSE_GAS5 and is now connected to the J-BOTTOM piezoelectric valve. Using a shot from prior to 970626xxx will require the operator to move a point in the all V's screen [for all segments] in order to pick up the name change. | |
| Jun 26 1997 09:12:44:180AM | 970626005 | John Goetz | Shot 970626005: Load 970625003 coldstart hybrid - all matrices respond test shot with power for TF scanner purposes Results: Plasma breakdown @ 5.5msec - slight hesitation in the current rise no density feedback - causes disruption @ 0.97s computer network problem has lost some data |
| Jun 26 1997 10:13:32:250AM | 970626006 | John Goetz | Shot 970626006: draw [100Vx0.1s] @ 0.8s on PULSE_GAS5 (there is no connection from the output to the piezoelectric valve - this is just a test of the system up to the output) 70 minute cell access for various and sundry things Results: power supply dud shot cycle went like this: INIT->RECOOL->INIT due to an alternator low RPM no OH2's, EF1L, and EF2U |
| Jun 26 1997 10:31:33:260AM | 970626007 | John Goetz | Shot 970626007: draw [100Vx0.1s] @ 0.8s on PULSE_GAS5 (there is no connection from the output to the piezoelectric valve - this is just a test of the system up to the output) 70 minute cell access for various and sundry things Results: plasma breakdown @ .0055; slight current rise hesitation disrupts @ 0.2MA RF got some power in; H-modes; neutrons |
| Jun 26 1997 10:52:08:870AM | 970626008 | John Goetz | Shot 970626008: draw IP = -1000000 TF start time = -1.7sec and TF current = -175kA (6.3T) under PLC control Results: Plasma breakdown @ .0045; slight hesitation in current rise H-modes and heating EF4 at its current limit J-Bottom waveform not getting to the low voltage output |
| Jun 26 1997 11:35:25:840AM | 970626009 | John Goetz | Shot 970626009: draw IP = -1200000 TF start time = -1.7sec and TF current = -195kA (6.8T) under PLC control EF4 PLC current limit = [-9.,4.]kA RCUR = .667 for a bigger right gap Results: engineering dud EF1L out at -.27sec followed by EF1U and the OH2's |
| Jun 26 1997 11:59:21:100AM | 970626010 | John Goetz | Shot 970626010: draw IP = -1200000 TF start time = -1.7sec and TF current = -195kA (6.7T) under PLC control EF4 PLC current limit = [-9.,4.]kA RCUR = .667 for a bigger right gap Results: engineering dud EF1U pulled out at -.14 followed by EF1L and the OH2's TF made it to 6.8T |
| Jun 26 1997 12:27:32:700PM | 970626011 | John Goetz | Shot 970626011: draw IP = -1200000 TF start time = -1.7sec and TF current = -215kA (7.5T) under PLC control EF4 PLC current limit = [-9.,4.]kA RCUR = .667 for a bigger right gap Results: engineering dud EF1U out at -.21sec followed by the rest toroidal field = 7.4T |
| Jun 26 1997 01:03:59:250PM | 970626012 | John Goetz | Shot 970626012: test of EF1 only Results: EF1U pulls out at ~6kA at -0.9 |
| Jun 26 1997 01:19:10:740PM | 970626013 | John Goetz | Shot 970626013: EF1 test again with IOC limits switched for the forward and reverse directions Results: EF1's are operational |
| Jun 26 1997 02:09:01:580PM | 970626014 | John Goetz | Shot 970626014: draw IP = -1200000 TF start time = -1.7sec and TF current = -231kA (7.9T) under PLC control EF4 PLC current limit = [-9.,4.]kA RCUR = .667 for a bigger right gap Results: plasma breakdown @ .005; slight hesitation Bt = -8.1T; Ip = -1.2MA disrupts @ 1.53s (Ip = 0.4MA) TF begins to invert @ 1.17s alternator faults on smoke and vibration last shot of the run as the investigation begins |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 06:56:00:020AM | Test | Ok | tf scanner cycle no power |
| 2 | 07:22:58:560AM | Test | Ok | tf scanner cycle no power |
| 3 | 07:38:29:630AM | Test | Ok | tf scanner, no power shot |
| 4 | 08:13:48:070AM | Test | Ok | tf scanner, no power |
| 5 | 08:46:53:860AM | Plasma | Ok | no faults |
| 6 | 10:04:00:990AM | Plasma | Ok | |
| 7 | 10:18:39:880AM | Plasma | Ok | |
| 8 | 10:34:20:910AM | Plasma | Ok | 175 ka tf no faults plasma |
| 9 | 11:21:18:760AM | Plasma | Ok | ef1 fault |
| 10 | 11:39:50:460AM | Plasma | Ok | ef 1 fault |
| 11 | 12:08:55:960PM | Plasma | Ok | ef1 fault |
| 12 | 12:49:14:640PM | Test | Ok | |
| 13 | 01:15:05:970PM | Test | Ok | |
| 14 | 01:24:12:300PM | Plasma | Bad | alternator vibration faults |