| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Joseph Snipes |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Bill Parkin,Bill Byford,Gary Dekow |
| Engineering Operator Run Comment |
| MP#357 Low Frequency Active MHD Experiment; SL:Snipes; PO:Rowan; EO:Deko |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:03:443PM |
| Author: Joseph Snipes |
| Run Summary for 1040305 MP#357 Low Frequency Active MHD Session Leader: J A Snipes Physics Operator: W L Rowan MP357 Low Frequency Active MHD run looking for MHD eigenmode resonances. Starting with inner wall limited Ohmic plasmas with low elongation at 5.4 T and 0.8 MA at moderate density of nl04 = 1 x 10^20 m^-2. Summary: The machine ran rather well, though the data acquisition system had several failures. Nonetheless, we managed to do the experiment. The new audio amplifier drove 40 - 60 A peak current into each of the two Active MHD antennas for most of the discharge and worked excellently without overheating because of the low duty cycle. While there were a few shots where there seemed to be possible resonances at the Active MHD frequency, but other shots showed no correlation with the Active MHD frequency. So, it seems that the Active MHD antennas have little or no effect on MHD modes in the plasma at audio frequencies at least for all of the conditions we tried, which included inner wall limited and diverted plasmas at low and high density with flattop TF of 5.4 T or ramping TF down to 2.5 T, with flattop Ip of 1 MA or ramping Ip down to 0.4 MA, and with outer gaps between 1.5 cm and a few mm to even outboard limited. Indeed, we achieved an Ohmic H-mode with an outboard limited plasma with only 1.5 MW of Ohmic input power at 2.4 T and 1.9 x 10^20 m^-3 on shot 1040305021. The last few shots attempted to see if there was any interaction between the Active MHD antennas at low frequency and locked modes with and without the A-coils, but the results were inconclusive. Shot 1: Set Active MHD f0 = 10 kHz at an amplitude of 2.5 V. Gains on Crest Audio amplifier set to 0 dB. Also plugged in the function generator on ACQ32_1:INPUT_01 and the VCO on ACQ32_1:INPUT_02. Data system failed. Shot 2: Repeat with multiple frequency sweeps from 11 kHz to 1 kHz. Data system failed again but some data did come through. Shot 3: Data system partially worked. Shot 4: Finally got good data. Good shot, but very little signal from Active MHD antennas. Shot 5: Repeat. Still little signal. Shot 6: Reduce outer gap to 0.5 cm. Shot 7: Removed input to low frequency amplifier on antenna 1, GH_LOWER, to see if there is some cancellation of the perturbed field because both antennas are being driven. Appears to be even less signal on the pick-up coils. Shot 8: Reconnected the input to the GH_LOWER antenna and reversed the polarity of the output to drive a different m spectrum. Good shot. V_GH_LOWER now is very small even though the output currents in both antennas reached 100 A peak! Shot 9: Reduced outer gap to 2 mm. Shot 10: Reduced Ip to 0.4 MA and increased nl04 to 1.5 x 10^20 m^-2 at 1.5 s. Disrupted at 1.65 s. Shot 11: Repeat with a diverted plasma. Disrupted at 1.74 s. Shot 12: Repeat with a smaller outer gap down to 0.5 cm. Shot 13: Repeat with a smaller outer gap down to 0.3 cm. Shot 14: Fizzle. Shot 15: Put in a new cable to invert the input to the amplifier for GH_LOWER antenna. This inverts the current in the GH_LOWER antenna properly. Shot 16: Repeat. Shot 17: Repeat. Still seeing a peak at 1.05 s around 7 kHz that is nearly correlated with the Active MHD frequency. Shot 18: Took out one frequency scan at 1.05 s to see if the apparent resonance moves. It did move to about 1.08 s in the middle of the next sweep. So, it could be coincidental, but at least it did move to the next sweep. Shot 19: Fizzle. Data system failed again. Shot 20: Repeat again. Apparent resonance at 1.05 s is back even though the Active MHD frequency does not go through that frequency at that time. So, it appears to be related to the MARFE and independent of the Active MHD excitation. Shot 21: Return to 0.8 MA flattop and ramp down the TF to 2.2 T at 1.5 s to go to low q. Density flat at 0.85 x 10^20 m^-2. Outboard limited Ohmic H-mode at 1.14 s with 1.46 MW of POH at nebar = 1.9 x 10^20 m^-3 and 2.42 T. Shot 22: Increase outer gap and reduce the ramp rate of the TF. Shot 23: Returned GH_LOWER antenna to the same polarity as the GH_UPPER antenna. Shot 24: Repeat. Shot 25: Return to inner wall limited but now going to low q. This should avoid the H-mode. Shot 26: Reduced ramp rate and frequency range of Active MHD to concentrate on frequencies below 7 kHz. Shot 27: Go to low density at 5 x 10^20 m^-2, flattop TF at 5.4 T and flattop Ip at 1 MA. Mode locks at 1.05 s at the minimum in Active MHD frequency, perhaps by coincidence. Shot 28: Changed when the Active frequency goes to near zero to 0.8 s and put in a very slow ramp up to about 1 kHz by the end of the shot. Turning on the A coils at 1.2 s. No clear resonances found. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:49:287PM |
| Author: Bill Rowan |
| Physics Operator Summary, Friday, March 5, 2004, Run 1040305 MP#357 Low Frequency Active MHD Experiment Session Leader: Snipes Physop: Rowan Engop: Dekow, Byford, Parkin =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Summary----------------------------------------------------------------------- The run started with an inner wall limited discharge. It was loaded from 1040209005. A-coils were disabled for all but the last shot of this run. The outer gap was adjusted down to approximately 5 mm over a series of shots. For shot 010 the current was ramped down to 0.4 MA. The density was programmed for a ramp up. A diverted shot was used for shots 011 through 024. The current and density ramps were added once again. A BT ramp with constant density and plasma current was applied on shots 021 through 024. Returned to an inner wall limited discharge for shots 025 through 026. This was a copy of shot 006 with a BT rampdown added. A diverted shot (1040301003) was reloaded for shots 027 and 028. The density was reduced to assure locked modes. The A-coil was not applied on shot 027 and locked modes were observed. For shot 028, the A-coils were energized. There were several delays due to data acquisition problems. Note that PCS crashed during two of these. Score Card------------------------------------------------------------------ Plasmas 26 (001,002,003,004,005,006,007,008,009,010,011, 012,013,015,016,017,018,020,021,022,023,024, 025,026,027,028) Fizzles 02 (014,019) Total 28 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Engineering Setup------------------------------------------------------------- ECDC overnight in D2, stopping by 07:00 on Friday morning Run Begins at 09:00 and ends at 17:00 Power Supplies as on 1040209005 Gas System Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) fill NINJA (lower cap) with 5 psi D2 All diagnostic valves (ECE, VUV, DNB) Enabled assuming no vacuum problems RF: NO RF FOR FRIDAY =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Run plan---------------------------------------------------------------------- Due to limited RF power, we will only do the Ohmic part of the run. Begin with an inner wall limited low elongation plasma like 1040209005 at 0.8 MA and 5.4 T. Sweep the Active MHD frequency from 2 to 20 kHz in multiple sweeps throughout the shot at full power looking for resonant MHD eigenmodes. Decrease the outer gap from 1.5 cm to 1 cm and repeat. Decrease the outer gap again to 2 to 3 mm and repeat. Choose the outer gap where resonances are clearest or if there are no clear resonances, return to 1.5 cm outer gap and then ramp the density up to nl04 = 1.5 x 10^20 m^-2 and the current down to 0.4 MA by the end of the flattop at 1.5 s to approach the density limit. Next, return to 0.8 MA and ramp the TF down to 2.2 T to approach the low q limit. In each case sweep the Active MHD frequency looking for resonances. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Detailed Log------------------------------------------------------------------ Load from 1040209005 A coils are disabled 001. Plasma. Clearly inner wall limited. Data acquisition problems PCDAQ mhd1 was part of the problem 002. Plasma. Data acquistion problems persist. Next shot. Tom restarted the servers Some improvements to tci laser operation 003. Plasma Nest shot. No pcs changes 004. Plasma Data acquistion problems persist. Computers guys on it. Next shot. No pcs changes 005. Plasma Next shot. Reduce the outer gap by 1 cm Increase RCUR by 5 mm PCS problems in preparing for next shot. PCS was corrupted Reloaded the starting shot 1040209005 Reentered the RCUR changes 006. Plasma Outer gap is approximately 0.5 cm Cell access for Joe to work on antennas and power room access Next shot. No pcs changes 007. Plasma. Next shot., No pcs changes. 008. Plasma. Next shot. Reduce the outer gap to approximately 3 mm. Increased RCUR by 1 mm 009. Plasma. Next shot. Return to the outer gap of shot 006. Ramp IP to 0.4 MA Ramp nl_04 to 1.5e+20 010. Plasma Next shot. Reload segment 2 from 1040301003 diverted shot Ip ramp to 0.4 Ma nl_04 ramp to 1.5e+20 011. Plasma Next shot. Decrease the outer gap by 5 mm Increase RCUR by 3 mm 012. Plasma Next shot. Decrease the outer gap to 3 mm and flatten it out. 013. Plasma Next shot Reduce Bt slightly in segment 1 from 5.6 T to 5.4 T 014. Fizzle Next shot. Reloaded segment 1 from shot 013. 015. Plasma Next shot. No PCS changes 016. Plasma Next shot. No PCS changes 017. Plasma Next shot. No PCS changes 018. Plasma Next shot nl_04 changed to flat at 8.5e+19 IP = 0.8 MA BT ramped down to 2.2 T 019. Fizzle. computer problems PCS failure after this shot. Next shot. reloaded shot 018 Reduced BR_0 offset for 0.0005 T to 0.0 T 020. Plasma Next shot. Reloaded shot 018 Reduced BR_0 offset for 0.0005 T to 0.0 T nl_04 changed to flat at 8.5e+19 IP = 0.8 MA BT ramped down to 2.2 T 021. Plasma. Disruption at 1.3s Outer wall limited May be an H-mode Next shot. Slow the rampdown rate of the TF Increased the outer gap by approx 1.0 cm 022. Plasma Disruption at 1.3s Next shot. No changes 023. Plasma. Next shot. No pcs changes 024. Plasma Next shot. reloaded shot 006 Bt ramping to 2.2T at 1.5s This should be innerwall limited 025. Plasma Next shot. No pcs changes. 026. Plasma Next shot. Reload segment 2 from 1040301003 Reduce nl_04 to 5e19 027. Plasma Next shot. Enable A coils 028. Plasma. |
| Session Leader Comments | |||
| Mar 5 2004 09:01:43:947AM | Joseph Snipes | MP357 Low Frequency Active MHD run looking for MHD eigenmode resonances. Starting with inner wall limited Ohmic plasmas with low elongation at 5.4 T and 0.8 MA at moderate density of nl04 = 1 x 10^20 m^-2. | |
| Mar 5 2004 09:27:57:150AM | 1040305001 | Joseph Snipes | Shot 1: Set Active MHD f0 = 10 kHz at an amplitude of 2.5 V. Gains on Crest Audio amplifier set to 0 dB. Also plugged in the function generator on ACQ32_1:INPUT_01 and the VCO on ACQ32_1:INPUT_02. |
| Mar 5 2004 09:37:45:737AM | 1040305002 | Joseph Snipes | Shot 2: Repeat with multiple frequency sweeps from 11 kHz to 1 kHz. Data system failed again but some data did come through. |
| Mar 5 2004 11:04:32:167AM | 1040305004 | Joseph Snipes | Shot 4: Data system finally worked. |
| Mar 5 2004 11:05:21:900AM | 1040305005 | Joseph Snipes | Shot 5: Repeat. Good shot. Very little signal from active MHD antennas on pick-up coils. |
| Mar 5 2004 11:06:50:513AM | 1040305006 | Joseph Snipes | Shot 6: Reduce outer gap to 0.5 cm. |
| Mar 5 2004 11:17:15:227AM | 1040305007 | Joseph Snipes | Shot 7: Removed input to low frequency amplifier on antenna 1, GH_LOWER, to see if there is some cancellation of the perturbed field because both antennas are being driven. Appears to be even less signal on the pick-up coils. |
| Mar 5 2004 11:45:14:917AM | 1040305008 | Joseph Snipes | Shot 8: Reconnected the input to the GH_LOWER antenna and reversed the polarity of the output to drive a different m spectrum. Good shot. V_GH_LOWER now is very small even though the output currents in both antennas reached 100 A peak! |
| Mar 5 2004 12:18:27:750PM | 1040305009 | Joseph Snipes | Shot 9: Reduced outer gap to 2 mm. |
| Mar 5 2004 12:28:37:387PM | 1040305010 | Joseph Snipes | Shot 10: Reduced Ip to 0.4 MA and increased nl04 to 1.5 x 10^20 m^-2 at 1.5 s. Disrupted at 1.65 |
| Mar 5 2004 12:36:54:727PM | 1040305011 | Joseph Snipes | Shot 11: Repeat with a diverted plasma. Disrupted at 1.74 s. |
| Mar 5 2004 12:54:30:863PM | 1040305012 | Joseph Snipes | Shot 12: Repeat with a smaller outer gap down to 0.5 cm. |
| Mar 5 2004 01:03:07:437PM | 1040305013 | Joseph Snipes | Shot 13: Repeat with a smaller outer gap down to 0.3 cm. |
| Mar 5 2004 01:16:01:300PM | 1040305014 | Joseph Snipes | Shot 14: Fizzle. |
| Mar 5 2004 01:31:22:407PM | 1040305015 | Joseph Snipes | Shot 15: Put in a new cable to invert the input to the amplifier for GH_LOWER antenna. This inverts the current in the GH_LOWER antenna properly. |
| Mar 5 2004 01:55:52:950PM | 1040305015 | Joseph Snipes | Shot 15: Two small peaks on pickup coils between 1.05 and 1.2 s nearly at the same frequency as the Active MHD, but perhaps just coincidental. |
| Mar 5 2004 01:54:56:867PM | 1040305016 | Joseph Snipes | Shot 16: Moved ACQ16 start time to 0.25 s to extend the end time to 1.75 s. |
| Mar 5 2004 01:56:36:220PM | 1040305016 | Joseph Snipes | Shot 16: Repeat. |
| Mar 5 2004 02:05:49:890PM | 1040305017 | Joseph Snipes | Shot 17: Repeat. Still seeing a peak at 1.05 s around 7 kHz that is nearly correlated with the Active MHD frequency. |
| Mar 5 2004 02:16:00:347PM | 1040305018 | Joseph Snipes | Shot 18: Took out one frequency scan at 1.05 s to see if the apparent resonance moves. It did move to about 1.08 s in the middle of the next sweep. So, it could be coincidental, but at least it did move to the next sweep. |
| Mar 5 2004 02:45:25:073PM | 1040305019 | Joseph Snipes | Shot 19: Fizzle. Data system failed again. |
| Mar 5 2004 03:03:19:897PM | 1040305020 | Joseph Snipes | Shot 20: Repeat again. Apparent resonance at 1.05 s is back even though the Active MHD frequency does not go through that frequency at that time. So, it appears to be related to the MARFE and independent of the Active MHD excitation. |
| Mar 5 2004 03:19:04:193PM | 1040305021 | Joseph Snipes | Shot 21: Return to 0.8 MA flattop and ramp down the TF to 2.2 T at 1.5 s to go to low q. Density flat at 0.85 x 10^20 m^-2. Outboard limited Ohmic H-mode at 1.14 s with 1.46 MW of POH at nebar = 1.9 x 10^20 m^-3 and 2.42 T. |
| Mar 5 2004 03:26:48:047PM | 1040305022 | Joseph Snipes | Shot 22: Increase outer gap and reduce the ramp rate of the TF. |
| Mar 5 2004 03:45:36:093PM | 1040305023 | Joseph Snipes | Shot 23: Returned GH_LOWER antenna to the same polarity as the GH_UPPER antenna. |
| Mar 5 2004 03:54:03:383PM | 1040305024 | Joseph Snipes | Shot 24: Repeat. |
| Mar 5 2004 04:15:12:113PM | 1040305025 | Joseph Snipes | Shot 25: Return to inner wall limited but now going to low q. This should avoid the H-mode. |
| Mar 5 2004 04:38:35:967PM | 1040305026 | Joseph Snipes | Shot 26: Reduced ramp rate and frequency range of Active MHD to concentrate on frequencies below 7 kHz. |
| Mar 5 2004 04:46:02:800PM | 1040305027 | Joseph Snipes | Shot 27: Go to low density at 5 x 10^20 m^-2, flattop TF at 5.4 T and flattop Ip at 1 MA. Mode locks at 1.05 s at the minimum in Active MHD frequency, perhaps by coincidence. |
| Mar 5 2004 05:15:42:543PM | 1040305028 | Joseph Snipes | Shot 28: Changed when the Active frequency goes to near zero to 0.8 s and put in a very slow ramp up to about 1 kHz by the end of the shot. Turning on the A coils at 1.2 s. No clear resonances found. |
| Mar 5 2004 05:27:38:557PM | 1040305028 | Joseph Snipes | Summary: The machine ran rather well, though the data acquisition system had several failures. Nonetheless, we managed to do the experiment. The new audio amplifier drove 40 - 60 A peak current into each of the two Active MHD antennas for most of the discharge and worked excellently without overheating because of the low duty cycle. While there were a few shots where there seemed to be possible resonances at the Active MHD frequency, but other shots showed no correlation with the Active MHD frequency. So, it seems that the Active MHD antennas have little or no effect on MHD modes in the plasma at audio frequencies at least for all of the conditions we tried, which included inner wall limited and diverted plasmas at low and high density with flattop TF of 5.4 T or ramping TF down to 2.5 T, with flattop Ip of 1 MA or ramping Ip down to 0.4 MA, and with outer gaps between 1.5 cm and a few mm to even outboard limited. Indeed, we achieved an Ohmic H-mode with an outboard limited plasma with only 1.5 MW of Ohmic input power at 2.4 T and 1.9 x 10^20 m^-3 on shot 1040305021. The last few shots attempted to see if there was any interaction between the Active MHD antennas at low frequency and locked modes with and without the A-coils, but the results were inconclusive. |
| Physics Operator Comments | |||
| Mar 5 2004 07:55:33:840AM | Bill Rowan | Engineering Setup and Run Plan 1040305, Friday, March 5, 2004. MP#357 Low Frequency Active MHD Experiment Session Leader: Snipes Physop: Rowan Engineering Setup: ECDC overnight in D2, stopping by 07:00 on Friday morning Run Begins at 09:00 and ends at 17:00 Power Supplies as on 1040209005 Gas System Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) fill NINJA (lower cap) with 5 psi D2 All diagnostic valves (ECE, VUV, DNB) Enabled assuming no vacuum problems RF: NO RF FOR FRIDAY Run plan for MP 357 Active Low Frequency MHD Due to limited RF power, we will only do the Ohmic part of the run. Begin with an inner wall limited low elongation plasma like 1040209005 at 0.8 MA and 5.4 T. Sweep the Active MHD frequency from 2 to 20 kHz in multiple sweeps throughout the shot at full power looking for resonant MHD eigenmodes. Decrease the outer gap from 1.5 cm to 1 cm and repeat. Decrease the outer gap again to 2 to 3 mm and repeat. Choose the outer gap where resonances are clearest or if there are no clear resonances, return to 1.5 cm outer gap and then ramp the density up to nl04 = 1.5 x 10^20 m^-2 and the current down to 0.4 MA by the end of the flattop at 1.5 s to approach the density limit. Next, return to 0.8 MA and ramp the TF down to 2.2 T to approach the low q limit. In each case sweep the Active MHD frequency looking for resonances. | |
| Mar 5 2004 08:08:12:010AM | Bill Rowan | Load from 1040209005 | |
| Mar 5 2004 09:14:22:320AM | 1040305001 | Bill Rowan | 001. Plasma. Clearly inner wall limited. Data acquisition problems |
| Mar 5 2004 09:22:14:220AM | 1040305001 | Bill Rowan | PCDAQ mhd1 was part of the problem |
| Mar 5 2004 09:31:13:823AM | 1040305002 | Bill Rowan | 002. Plasma. |
| Mar 5 2004 09:38:31:550AM | 1040305002 | Bill Rowan | Data acquistion problems persist. Next shot. Tom restarted the servers |
| Mar 5 2004 10:11:58:730AM | 1040305003 | Bill Rowan | 003. Plasma Nest shot. No pcs changes |
| Mar 5 2004 10:27:17:717AM | 1040305004 | Bill Rowan | 004. Plasma Data acquistion problems persist. Computers guys on it. Next shot. No pcs changes |
| Mar 5 2004 10:47:47:100AM | 1040305005 | Bill Rowan | 005. Plasma Next shot. Reduce the outer gap by 1 cm Increase RCUR by 5 mm |
| Mar 5 2004 10:51:44:840AM | 1040305005 | Bill Rowan | PCS problems in preparing for next shot. PCS was corrupted |
| Mar 5 2004 10:55:34:670AM | 1040305006 | Bill Rowan | 006. Plasma Outer gap is approximately 0.5 cm Cell access for Joe to work on antennas and power room access |
| Mar 5 2004 11:04:45:573AM | 1040305006 | Bill Rowan | Next shot. No pcs changes |
| Mar 5 2004 11:18:28:837AM | 1040305007 | Bill Rowan | 007. Plasma. |
| Mar 5 2004 11:47:09:403AM | 1040305008 | Bill Rowan | 008. Plasma. Next shot. Reduce the outer gap to approximately 3 mm. Increased RCUR by 1 mm |
| Mar 5 2004 12:09:59:570PM | 1040305009 | Bill Rowan | 009. Plasma. |
| Mar 5 2004 12:12:13:760PM | 1040305009 | Bill Rowan | 009. Plasma. Next shot. Return to the outer gap of shot 006. Ramp IP to 0.4 MA Ramp nl_04 to 1.5e+20 |
| Mar 5 2004 12:27:04:950PM | 1040305010 | Bill Rowan | 010. Plasma Next shot. Reload segment 2 from 1040301003 Ip ramp to 0.4 Ma nl_04 ramp to 1.5e+20 |
| Mar 5 2004 12:36:27:897PM | 1040305011 | Bill Rowan | 011. Plasma Next shot. Decrease the outer gap by 5 mm Increase RCUR by 3 mm |
| Mar 5 2004 12:50:38:053PM | 1040305012 | Bill Rowan | 012. Plasma Next shot. Decrease the outer gap to 3 mm and flatten it out. |
| Mar 5 2004 01:13:26:833PM | 1040305013 | Bill Rowan | 013. Plasma Next shot Reduce Bt slightly in segment 1 from 5.6 T to 5.4 T |
| Mar 5 2004 01:13:41:583PM | 1040305014 | Bill Rowan | 014. Fizzle Next shot. Reloaded segment 1 from shot 013. |
| Mar 5 2004 01:30:25:073PM | 1040305015 | Bill Rowan | 015. Plasma |
| Mar 5 2004 01:57:20:460PM | 1040305017 | Bill Rowan | 017. Plasma |
| Mar 5 2004 02:06:15:910PM | 1040305017 | Bill Rowan | 017. Plasma Next shot. No PCS changes |
| Mar 5 2004 02:18:15:483PM | 1040305018 | Bill Rowan | 018. Plasma Next shot nl_04 changed to flat at 8.5e+19 IP = 0.8 MA BT ramped down to 2.2 T |
| Mar 5 2004 03:05:02:157PM | 1040305019 | Bill Rowan | 019. Fizzle. computer problems PCS failure after this shot. Next shot. reloaded shot 018 Reduced BR_0 offset for 0.0005 T to 0.0 T |
| Mar 5 2004 03:03:14:790PM | 1040305020 | Bill Rowan | 020. Plasma Next shot. Reloaded shot 018 Reduced BR_0 offset for 0.0005 T to 0.0 T nl_04 changed to flat at 8.5e+19 IP = 0.8 MA BT ramped down to 2.2 T |
| Mar 5 2004 03:11:55:957PM | 1040305021 | Bill Rowan | 021. Plasma. Disruption at 1.3s Next shot. Slow the rampdown rate of the TF Increased the outer gap by approx 1.0 cm |
| Mar 5 2004 03:32:56:357PM | 1040305022 | Bill Rowan | 022. Plasma Disruption at 1.3s Next shot. No changes |
| Mar 5 2004 04:17:40:610PM | 1040305022 | Bill Rowan | 026. Plasma Next shot. No pcs changes |
| Mar 5 2004 04:47:16:930PM | 1040305023 | Bill Rowan | 023. Plasma. |
| Mar 5 2004 04:47:43:323PM | 1040305023 | Bill Rowan | Next shot. No pcs changes |
| Mar 5 2004 04:48:17:470PM | 1040305024 | Bill Rowan | 024. Plasma |
| Mar 5 2004 04:48:33:080PM | 1040305024 | Bill Rowan | Next shot. reloaded shot 006 Bt ramping to 2.2T at 1.5s |
| Mar 5 2004 04:48:50:237PM | 1040305025 | Bill Rowan | 025. Plasma |
| Mar 5 2004 04:49:06:033PM | 1040305025 | Bill Rowan | Next shot. No pcs changes. |
| Mar 5 2004 04:43:12:927PM | 1040305026 | Bill Rowan | 026. Plasma Next shot. Reload segment 2 from 1040301003 Reduce nl_04 to 5e19 xt shot. No pcs changes |
| Mar 5 2004 04:46:36:680PM | 1040305027 | Bill Rowan | 027. Plasma Next shot. Enable A coils |
| Mar 5 2004 04:58:46:630PM | 1040305028 | Bill Rowan | 028. Plasma |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:06:08:500AM | Plasma | Ok | |
| 2 | 09:26:15:473AM | Plasma | Ok | |
| 3 | 10:02:48:673AM | Plasma | Ok | |
| 4 | 10:18:38:940AM | Plasma | Ok | |
| 5 | 10:33:47:320AM | Plasma | Ok | |
| 6 | 10:51:56:497AM | Plasma | Ok | |
| 7 | 11:08:48:890AM | Plasma | Ok | |
| 8 | 11:21:58:623AM | Plasma | Ok | |
| 9 | 11:50:12:187AM | Plasma | Ok | |
| 10 | 12:12:30:853PM | Plasma | Ok | |
| 11 | 12:27:52:810PM | Plasma | Ok | |
| 12 | 12:41:20:433PM | Plasma | Ok | |
| 13 | 12:56:00:747PM | Plasma | Ok | |
| 14 | 01:08:58:357PM | Plasma | Ok | |
| 15 | 01:21:40:827PM | Plasma | Ok | |
| 16 | 01:38:00:860PM | Plasma | Ok | |
| 17 | 01:54:24:240PM | Plasma | Ok | |
| 18 | 02:07:11:990PM | Plasma | Ok | |
| 19 | 02:20:00:510PM | Plasma | Ok | |
| 20 | 02:48:37:543PM | Plasma | Ok | |
| 21 | 03:04:52:920PM | Plasma | Ok | |
| 22 | 03:17:59:923PM | Plasma | Ok | |
| 23 | 03:31:13:660PM | Test | Ok | |
| 24 | 03:44:28:180PM | Plasma | Ok | |
| 25 | 03:58:09:873PM | Plasma | Ok | |
| 26 | 04:14:47:130PM | Plasma | Ok | |
| 27 | 04:36:25:300PM | Plasma | Ok | |
| 28 | 04:54:57:297PM | Plasma | Ok | |