| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Paul Bonoli |
| Physics operator(s): | John Goetz |
| Engineering operator(s): | Frank Silva,Bill Cochran,Vinny Bertolino |
| Engineering Operator Run Comment |
| MP 190 Bonoli,Goetz,Cochran,Bertolino,Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:18:273PM |
| Author: To Be Determined |
****980219****980219****980219****980219****980219****980219****980219 MP190 Off-axis Mode Conversion Electron Heating & ITB Formation in D(He3) at 8.0~T Physics Operator: J.~Goetz Session Leader: P.T.~Bonoli The ultimate objective of this mini-proposal is to produce an internal transport barrier (ITB) triggered by MEASURED poloidal shear flows driven by mode converted ion Bernstein waves (IBW). We will begin with a 5.4~T fiducial and step the TF up to 8.0~T. Once at 8.0~T, an attempt will be made to produce a PEP mode using Li pellet plus on-axis He-3 minority heating. We will then go to a discharge with off-axis MCEH by increasing n_{He3} / n_{e} to about 20%. RF modulation will be done to determine the location of the MCEH, then plasma rotation will be measured (hopefully) using the HIREX, with the rf power held constant (no modulation). Next, plasma rotation will be measured in the presence of Li pellet injection. This sequence will be repeated at lower and higher n_{He3}. ------------------------------------------------------------------------------ Engineering setup for 980219: Overnight ECDC in He Two hours of ECDC in deuterium before the run, if possible. Engineering setup as on 980218, with TF under hybrid control Gas setup - fill K-side with 30 PSI of D2, hybrid enable fill B-top with 6 PSI of D2, hybrid enable fill B-side-lower with 1 PSI of Ar, hybrid enable fill B-side-upper with 16 PSI of He3, hybrid disabled If this plenum already contains Helium-3 in the range of 15-20 psi, no need to top off. AFTER FILLING THE PLENUM, DISCONNECT THE PLC FROM THE VALVE!!! The following gate valves should be enabled, assuming no vacuum problems: ECE LP Physics Plan 1. Start with 5.4T fiducial discharge (980218002). 5.4T, 0.8 MA, nl_04~1.0, q95~4.5 -- evaluate machine performance 8.0T, 1.2~MA 980212018 enable B-side upper 2. Produce an 8.0~T PEP mode with on-axis D(He3) minority heating 8.0~T D(He3) n_{3He} -> 100V for 15 msec 3. Measure rotation in the presence of off-axis MCEH with / without pellet fueling (a) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure MCEH position with rf modulation (b) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure rotation (using HIREX) with constant rf power (c) 8.0~T D(He3) n_{3He} -> 100V for 200 msec modulate rf and measure MCEH position -> Inject Li pellet (d) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure rotation (using HIREX) with constant rf power -> Inject Li pellet Repeat Sequence 3(a) - 3(d) at higher / lower He-3 concentration n_{3He} -> 100V for 100 msec n_{3He} -> 100V for 300 msec ***************************************************************************** Run Summary ***************************************************************************** The mini-proposal MP190 essentially was not done today because of TF cooling and / or instrumentation problems (see Physics Operator Summary). The MP was stopped at shot 007 at which point no data had been obtained (except for the reference discharges at 8.0~T - shots 005 & 006). We then ran at 5.4~T for the remainder of the day, obtaining D(H) minority heating data at low concentrations (nominally 4-5% H). This will fill in a gap in the data from the previous day's MP on D(H) mode conversion heating (MP 189). The H concentration (measured by PCX) was scanned upward from about 2 % to 8% and then was allowed to decrease back to 4% during the final 9 shots of the day. A notch down was inserted at the end of the rf pulse, which will allow us to analyze P_abs for the rf for this series of shots (analysis must still be done). The plasma H-modes were EDA-like but typically collapsed as the MO radiation increased during the discharge. This resulted in multiple H->L transitions in many shots. One important observation in these discharges was the minimal increase in nl_04 (typically 10%) during the ICRF injection. This may be due to the the 25~msec ("gradual") turn-on of the ICRF power that was used during the run. ***************************************************************************** Shot by shot summary follows: 001 5.4~T Fiducial Attempt loaded from 980218002 - Fizzle 002 5.4~T Fiducial - Plasma with EDA / ELM-free periods, MO injection at 0.9~s. W_mhd = 110~kJ & H=1.5. H/(H+d) = 2% - all Ti's will be processed at 100% D Take shot again OH resistance > 1 micro-ohm warning - stop to check it out Long delay until 10:50~AM to fix problems 003 Test shot 004 Plasma - EDA / No MO injections W_mhd = 115~kJ & H = 1.5 Move on to 8.0~T 005 Plasma - 7.7~T & 1.0~MA 35~msec He-3 puff @ 100~V Early H_mode - but lost it when rf tripped at 3.8-4.0~MW. HIREX aimed at (0.772,0.774,0.772)~m <-> (1,2,4) Take shot at 8.0~T with rf reduced to 3.2~MW 006 Plasma - lots of H-L transitions (poor H-mode) 8.0~T & 1.0~MA W_mhd = 130~kJ, T_e(0) = 4.3~keV, H = 1.0 - 1.2 HIREX aimed at (0.776,0.779,0.775)~m <-> (1,2,4) Next take same shot with Li pellet Cooling problems with TF - go back and take a fiducial at 5.4~T 007 Plasma - 5.4~T & 800~kA Li pellet fired OK at 0.88~s -> rf survived Started in H-mode, pellet fired and got a PEP like mode unitl 0.99~s, then got H-mode again **************************************************************************** next shot: 8 T discharges have been scrubbed due to instrumentation problems. We will continue with yesterday's H minority scan emphasizing the low concentration range to maximize the RF absorption. Start by puffing gas from plenum with about 5% H (hopefully). Do this for a few shots and then purge plenum and go back to D gas only. ***************************************************************************** 008 Fizzle 009 Plasma - 5.4~T, & 1.0~MA. nl_04 = 1.54-> 1.68 during rf turn-on (used 25~msec turn-on time for ICRf power). Get two H-L transitions caused by radiation build-up H/(H+D) = 0.05-0.06, Ti processed with 0.055 H rf has voltage trips, P_rf = 2.8~MW Reduce P_rf by 0.25~MW 010 Plasma 5.4~T, & 1.0~MA. Get two H-L transitions (again) H/(H+D) = 0.06-0.07, Ti processed with 0.065 H rf has voltage trips P_rf = 2.5~MW nl_04 = 1.63 -> 1.81 as rf turns on Reduce P_rf by 0.25~MW. 011 Plasma - 5.4~T, & 1.0~MA. EDA until about 1.05~s then a H-L transition W_mhd = 160~kJ & H = 1.6 H/(H+D) = 0.07-0.08 , Ti processed with 0.075 H Trips in rf on E-port (again). 012 Plasma - with single H-L H/(H+D) = 0.08-0.06 , Ti processed with 0.07 H Trips in rf (e-port), due to voltage limits. H = 1.5, P_rf = 2.5~MW 013 Plasma - 5.4~T, & 1.0~MA. H/(H+D) = 0.08-0.07, Ti processed with 0.075 H Trips in rf H-L transition due to increase in MO radiation W_mhd = 0.150~kJ & H = 1.5 ***************************************************************************** Purge plenum and puff D mixture for remainder of run - no more H **************************************************************************** 014 Plasma - Li pellet fired near rf turn on. H/(H+D) = 0.05-0.06, Ti processed with 0.055 H EDA with H = 1.2, terminates with radiation increase at 1.09~s. 015 Plasma - Li pellet fired, P_rf = 2.2~MW rf on for entire pulse. H/(H+D) = 0.05-0.06, Ti processed with 0.055 H Got EDA which looks better than last shot with H = 1.4, W_mhd = 130-150~kJ, and Te(0) to 4.0~keV after PEP mode forms. Again get big radiation increase which kills H-mode at 1.01~sec. No more Li pellets for the day 016 Fizzle 017 Plasma - two H-L transitions, caused by increases in radiation. Get H = 1.4-1.5 with W_mhd about 150~kJ (max). H/H(H+D) = 0.04-0.05, Ti processed with 0.045 H 018 Plasma - EDA with H-L transition as radiation increases. H levels decreasing -> Te(0) = 3.6~keV. H/(H+D) = 0.04 - 0.05, Ti processed with 0.045 H 019 Plasma - Two H-L transitions due to radiation increase. Te(0) to 3.6~keV. H/(H+D) = 0.04-0.05, Ti processed with 0.045 H 020 Plasma with single H-L transition due radiation increase. H/(H+D) = 0.04 - 0.05, Ti processed with 0.045 H Te(0) to 3.5 - 3.6~keV 021 Plasma EDA with single H-L transition due to radiationincrease. H/(H+D) = 0.04, Ti processed with 0.04 H Te(0) to 3.5 - 3.6~keV ***************************************************************************** |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:59:583PM |
| Author: To Be Determined |
| Physics operator summary for 980219 EO: Cochran/Bertolino PO: Goetz SL: Bonoli Run 980219 was in support of Mini-Proposal #190 - Off-axis Mode Conversion Electron Heating & ITB Formation in D(He-3) at 8T. The ultimate objective of this mini-proposal is to produce an internal transport barrier (ITB) triggered by MEASURED poloidal shear flows driven by mode converted ion Bernstein waves (IBW). The goal was not reached today. The measurements of the TF temperatures were above administrative limits and 8T operation was abandoned. Run 980218 was brought back from the grave and a few more data points were obtained. See the Session Leader's report for a discussion of any physics results. Good day for start-up. Fizzles were obtained on the first shot (a definite Br problem), after a long wait (high CII), and on a bouncer. Current hesitations were the rule of the day though. No problems were encountered running 8T with TF under hybrid control. The hybrid conversion is 27.85 kA/Tesla. The OH resistance bell rang a couple times today. The resistance measurement indicated greater than 1 microohm. Not much else to say about machine operation today. Engineering, computing, and diagnostics today: Many shots were lost because of the high temperatures measured inside the TF magnet. No troubles with computing and diagnostics today. Scorecard: 23 shots = 19 plasmas + 3 fizzles + 0 eng. duds + 1 tests Shot summary for Run 980219: Load 980218002 coldstart hybrid - all matrices respond Shot change result ____ _____ ______ 1 see above fizzle - Br(mflux) = +2mT 2 BR_0=.004 (was .005) plasma - b.d. @ .008 - good current rise OH resistance > 1microohm 3 2hr. wait for OH instr. fix test o.k. take OH test shot 4 try the fiducial again plasma - b.d. @ .005 - good current rise 5 load 980212018; draw 215kA for plasma - b.d. @ .005(7.1T) - hesitation TF with a slow ramp down; set Bt=7.7T; early hards; OH res = 1.04 PLC limit to 230kA - start time to -1.4sec; IP=-1000000; PG1=.02; PG2=.035; BR_0=.0045 6 TF=-223000; move first PG3 to plasma - b.d. @ .005 - stil a slight .015sec; PG2=.022 hesitation - Bt=8.0T - early hards 7 load 980219004 - fiducial to evaluate cooling conditions SCRAM ON MP190 - 8T OPERATION OVER FOR THE DAY - TROUBLES WITH TF COOLING ADMINISTRATIVE LIMITS AND WHICH TAPS WERE BEING OBSERVED 8 load 980218008 and restart Run fizzle - Br a tad negative 980218 - fill K-side with 1psi H2+19psiD2+1psiH2+19psi D2 9 BR_0 = .005 plasma - b.d. @ .005; slight current hesitation 10 IC_EF4=-1330; PG1=10msec plasma - b.d. @ .005; 11 BR_0=.0055; PG1 off plasma - b.d. @ .006; Br better 12 no changes plasma - current rise o.k. 13 add Marmar puff during H-mode plasma - good current rise; puff (NL04 = 1.6e20) doesn't do much 14 K-side with 30psi deuterium plasma - good current rise 15 PG1=12ms; enable PI plasma - nice current rise 16 no changes fizzle - a bouncer 17 IC_EF4=-1335; PG4=15msec plasma - good current rise 18 disable PI plasma - current hesitation 19 IC_EF4=-1335 (both points) plasma - good current rise 20 PG1=.002 plasma - good current rise 21 no changes plasma - good current rise |
| Session Leader Comments | |||
| Feb 19 1998 10:22:15:740AM | Paul Bonoli | Physics Plan 1. Start with 5.4T fiducial discharge (980218002). 5.4T, 0.8 MA, nl_04~1.0, q95~4.5 -- evaluate machine performance 8.0T, 1.2~MA 980212018 enable B-side upper 2. Produce an 8.0~T PEP mode with on-axis D(He3) minority heating 8.0~T D(He3) n_{3He} -> 100V for 15 msec 3. Measure rotation in the presence of off-axis MCEH with / without pellet fueling (a) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure MCEH position with rf modulation (b) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure rotation (using HIREX) with constant rf power (c) 8.0~T D(He3) n_{3He} -> 100V for 200 msec modulate rf and measure MCEH position -> Inject Li pellet (d) 8.0~T D(He3) n_{3He} -> 100V for 200 msec measure rotation (using HIREX) with constant rf power -> Inject Li pellet Repeat Sequence 3(a) - 3(d) at higher / lower He-3 concentration n_{3He} -> 100V for 100 msec n_{3He} -> 100V for 300 msec | |
| Feb 20 1998 03:46:53:220PM | Paul Bonoli | ***************************************************************************** Run Summary ***************************************************************************** The mini-proposal MP190 essentially was not done today because of TF cooling and / or instrumentation problems (see Physics Operator Summary). The MP was stopped at shot 007 at which point no data had been obtained (except for the reference discharges at 8.0~T - shots 005 & 006). We then ran at 5.4~T for the remainder of the day, obtaining D(H) minority heating data at low concentrations (nominally 4-5% H). This will fill in a gap in the data from the previous day's MP on D(H) mode conversion heating (MP 189). The H concentration (measured by PCX) was scanned upward from about 2 % to 8% and then was allowed to decrease back to 4% during the final 9 shots of the day. A notch down was inserted at the end of the rf pulse, which will allow us to analyze P_abs for the rf for this series of shots (analysis must still be done). The plasma H-modes were EDA-like but typically collapsed as the MO radiation increased during the discharge. This resulted in multiple H->L transitions in many shots. One important observation in these discharges was the minimal increase in nl_04 (typically 10%) during the ICRF injection. This may be due to the the 25~msec ("gradual") turn-on of the ICRF power that was used during the run. ***************************************************************************** | |
| Feb 19 1998 09:38:54:270AM | 980219001 | Paul Bonoli | 001 5.4~T Fiducial Attempt loaded from 980218002 - Fizzle |
| Feb 19 1998 09:38:06:490AM | 980219002 | Paul Bonoli | 002 5.4~T Fiducial - Plasma with EDA / ELM-free periods, MO injection at 0.9~s. W_mhd = 110~kJ & H=1.5. H/(H+d) = 2% - >all Ti's will be processed at 100% D Take shot again |
| Feb 19 1998 10:54:28:270AM | 980219003 | Paul Bonoli | Long delay until 10:50~AM to fix problems 003 Test shot |
| Feb 19 1998 11:21:07:060AM | 980219004 | Paul Bonoli | 004 Plasma - EDA / No MO injections H/(H+D) = 0.02 W_mhd = 115~kJ & H = 1.5 & P_rf = 2.1~MW Move on to 8.0~T |
| Feb 19 1998 12:00:16:020PM | 980219005 | Paul Bonoli | 005 Plasma - 7.7~T & 1.0~MA 35~msec He-3 puff @ 100~V Early H_mode - but lost it when rf tripped at 3.8-4.0~MW. HIREX aimed at (0.772,0.774,0.772)~m <-> (1,2,4) Take shot at 8.0~T with rf reduced to 3.2~MW |
| Feb 19 1998 12:26:55:550PM | 980219006 | Paul Bonoli | 006 Plasma - lots of H-L transitions (poor H-mode) 8.0~T & 1.0~MA W_mhd = 130~kJ, T_e(0) = 4.3~keV, H = 1.0 - 1.2 HIREX aimed at (0.776,0.779,0.775)~m <-> (1,2,4) Next take same shot with Li pellet |
| Feb 19 1998 02:01:06:290PM | 980219007 | Paul Bonoli | Cooling problems with TF - go back and take a fiducial at 5.4~T 007 Plasma - 5.4~T & 800~kA Li pellet fired OK at 0.88~s -> rf survived Started in H-mode, pellet fired and got a PEP like mode unitl 0.99~s, then got H-mode again next shot: 8 T discharges have been scrubbed due to instrumentation problems. We will continue with yesterday's H minority scan emphasizing the low concentration range to maximize the RF absorption. |
| Feb 19 1998 02:29:41:390PM | 980219008 | Paul Bonoli | 008 Fizzle |
| Feb 19 1998 03:42:53:430PM | 980219009 | Paul Bonoli | 009 Plasma - 5.4~T & 1.0~MA with two H-L transitions H/(H+D) = 0.05=0.06, Ti processed with 0.055 H rf has voltage trips, P_rf = 2.8~MW, W_mhd = 170~kJ Reduce P_rf by 0.25~MW |
| Feb 19 1998 03:44:20:090PM | 980219010 | Paul Bonoli | 010 Plasma with two H-L transitions (again) H/(H+D) = 0.06-0.07, Ti processed with 0.065 H rf has voltage trips P_rf = 2.5~MW No rise in nl_04 as rf turns on Reduce P_rf by 0.25~MW. |
| Feb 19 1998 03:24:35:700PM | 980219011 | Paul Bonoli | 011 Plasma - EDA until about 1.05~s then a H-L transition H/(H+D) = 0.07-0.08, Ti processed with 0.075 H/(H+D) W_mhd = 160~kJ & H = 1.6 Trips in rf on E-port (again). |
| Feb 19 1998 03:32:23:120PM | 980219012 | Paul Bonoli | 012 Plasma - with single H-L H/(H+D) = 0.08 -> 0.06, Ti processed with 0.07 H Trips in rf (e-port), due to voltage limits. H = 1.5, P_rf = 2.5~MW |
| Feb 19 1998 03:40:38:030PM | 980219013 | Paul Bonoli | 013 Plasma with single H-L transition H/(H+D) = 0.08-0.07, Ti processed with 0.075 H Trips in rf H-mode killed off by increase in MO radiation W_mhd = 0.150~kJ & H = 1.5 |
| Feb 19 1998 04:00:25:100PM | 980219014 | Paul Bonoli | 014 Plasma - Li pellet fired near rf turn on. H/(H+D) = 0.05-0.06, Ti processed with 0.055 H EDA with H = 1.2, terminates with radiation increase at 1.09~s. |
| Feb 19 1998 04:24:03:360PM | 980219015 | Paul Bonoli | 015 Plasma - Li pellet fired rf on for entire pulse. H/(H+D) = 0.05-0.06, Ti processed with 0.055 H Got EDA which looks better than last shot with H = 1.4, W_mhd = 130-150~kJ, and Te(0) to 4.0~keV after PEP mode forms. Again get big radiation increase which kills H-mode at 1.01~sec. |
| Feb 19 1998 04:15:20:710PM | 980219016 | Paul Bonoli | Fizzle |
| Feb 19 1998 04:37:46:040PM | 980219017 | Paul Bonoli | 017 Plasma - two H-L transitions, caused by increases in radiation. Get H = 1.4-1.5 with W_mhd about 150~kJ (max). H/H(H+D) = 0.04-0.05, Ti processed with 0.045 H |
| Feb 19 1998 04:50:17:860PM | 980219018 | Paul Bonoli | 018 Plasma - EDA with H-L transition as radiation increases. Te(0) increasing as H levels decrease -> Te(0) = 3.6~keV. H/(H+D) = 0.04 - 0.05, Ti processed with 0.045 H |
| Feb 19 1998 04:57:55:960PM | 980219019 | Paul Bonoli | 019 Plasma - Two H-L transitions due to radiation increase. Te(0) to 3.6~keV. H/(H+D) = 0.04-0.05, Ti processed with 0.045 H |
| Feb 19 1998 05:07:13:180PM | 980219020 | Paul Bonoli | 020 Plasma with single H-L transition due radiation increase. H/(H+D) = 0.04 - 0.05, Ti processed with 0.045 H Te(0) to 3.5 - 3.6~keV |
| Feb 20 1998 09:02:37:930AM | 980219021 | Paul Bonoli | 021 Plasma EDA with single H-L transition due to radiation increase. H/(H+D) = 0.04 , Ti processed with 0.04 Te(0) to 3.5 - 3.6~keV |
| Physics Operator Comments | |||
| Feb 19 1998 08:01:08:420AM | John Goetz | MP190 Off-axis Mode Conversion Electron Heating & ITB Formation in D(He3) at 8.0~T The ultimate objective of this mini-proposal is to produce an internal transport barrier (ITB) triggered by MEASURED poloidal shear flows driven by mode converted ion Bernstein waves (IBW). We will begin with a 5.4~T fiducial and step the TF up to 8.0~T. Once at 8.0~T, an attempt will be made to produce a PEP mode using Li pellet plus on-axis He-3 minority heating. We will then go to a discharge with off-axis MCEH by increasing n_{He3} / n_{e} to about 20%. RF modulation will be done to determine the location of the MCEH, then plasma rotation will be measured (hopefully) using the HIREX, with the rf power held constant (no modulation). Next, plasma rotation will be measured in the presence of Li pellet injection. This sequence will be repeated at lower and higher n_{He3}. | |
| Feb 19 1998 08:02:54:060AM | John Goetz | MP190 Off-axis Mode Conversion Electron Heating & ITB Formation in D(He3) at 8.0~T Engineering setup for 980219: Overnight ECDC in He Two hours of ECDC in deuterium before the run, if possible. Engineering setup as on 980218, with TF under hybrid control Gas setup - fill K-side with 30 PSI of D2, hybrid enable fill B-top with 6 PSI of D2, hybrid enable fill B-side-lower with 3 PSI of Ar, hybrid enable fill B-side-upper with 16 PSI of He3, hybrid disabled The following gate valves should be enabled, assuming no vacuum problems: ECE - LI - PCX | |
| Feb 19 1998 08:41:20:820AM | 980219001 | John Goetz | Shot 001 Load 980218002 - a fiducial Fizzle MFLUX says Br = +2mT! |
| Feb 19 1998 09:12:03:850AM | 980219002 | John Goetz | Shot 002 BR_0 offset = .004 (was .005) Plasma breakdown at .008 - good current rise Almost fiducialicious, but an injection into the H-mode OH resistance > 1microohm warning = 1.00297 |
| Feb 19 1998 10:58:00:230AM | 980219003 | John Goetz | Shot 003 2 hour wait to fix OH thermocouple instrumentation take the OH test shot test looks o.k. |
| Feb 19 1998 11:19:05:650AM | 980219004 | John Goetz | Shot 004 try fiducial again plasma breakdown @ .005; good current rise o.k. on the fiducial scale |
| Feb 19 1998 11:47:05:220AM | 980219005 | John Goetz | Shot 005 load 980212018 IP = -1000000 BR_0 = .0045 PG1 = 20ms @ 0.3sec & PG2 = 35ms @ 0.45sec + maintenance TF = -215000 in segments 1 & 4; gentle ramp down @ 1.1sec TF PLC start @ -1.4sec; invert @ 1.2sec; 230kA limit; hybrid control plasma breakdown @ .005; current rise hesitation early hards Bt = 7.7T OH resistance warning - 1.04microohm |
| Feb 19 1998 12:20:20:860PM | 980219006 | John Goetz | Shot 006 TF = -223000 first PG3 point to .015sec plasma breakdown @ .005 (7.1T); slight current rise hesitation some early hards Bt = 8.0T |
| Feb 19 1998 12:51:32:520PM | 980219007 | John Goetz | Shot 007 load 980219004 plasma fiducial to evaluate cooling conditions |
| Feb 19 1998 02:29:51:990PM | 980219008 | John Goetz | SCRAM ON THE 8T RUN - ARGUMENTS OVER THE TF COOLING AND ADMINISTRATIVE LIMITS TAKE UP WHERE THE 980218 RUN LEFT OFF Shot 008 Load 980218008 fill K-side with 1psi H2 + 19psi D2 + 1psi H2 + 19psi D2 Fizzle Br a little negative?? |
| Feb 19 1998 02:40:30:160PM | 980219009 | John Goetz | Shot 009 BR_0 = .005 Plasma breakdown @ .005 - slight hesitation in current rise - Bz a bit negative? OH resistance = 1.0978 microohm |
| Feb 19 1998 02:57:06:590PM | 980219010 | John Goetz | Shot 010 IC_EF4 = -1330 PG1 = 13msec Plasma breakdown @ .005 - slight hesitation in current rise - Br a bit negative? |
| Feb 19 1998 03:08:34:390PM | 980219011 | John Goetz | Shot 011 BR_0 = .0055 PG1 off Plasma breakdown @ .005 - slight hesitation in current rise - Br o.k. now |
| Feb 19 1998 03:20:48:660PM | 980219012 | John Goetz | Shot 012 no changes Plasma breakdown @ .005 - current rise o.k. |
| Feb 19 1998 03:30:41:390PM | 980219013 | John Goetz | Shot 013 add Marmar puff during H-mode (NL04 = 1.6e20) Plasma best current rise of the day so far at 5.4T puff doesn't affect H-mode quality |
| Feb 19 1998 03:50:42:400PM | 980219014 | John Goetz | Shot 014 fill K-side with 30psi of deuterium PG1 - 10msec Plasma good current rise |
| Feb 19 1998 04:02:42:120PM | 980219015 | John Goetz | Shot 015 enable PI PG1 - 12msec Plasma nice current rise |
| Feb 19 1998 04:18:08:900PM | 980219016 | John Goetz | Shot 016 no changes Fizzle a bouncer |
| Feb 19 1998 04:24:58:290PM | 980219017 | John Goetz | Shot 017 IC_EF4 = -1335A PG4 = 15msec Plasma good current rise |
| Feb 19 1998 04:38:54:290PM | 980219018 | John Goetz | Shot 018 disable PI Plasma current rise hesitation - Bz a bit positive? |
| Feb 19 1998 04:47:18:330PM | 980219019 | John Goetz | Shot 019 IC_EF4 = -1335A (both points this time) Plasma good current rise |
| Feb 19 1998 04:58:43:510PM | 980219020 | John Goetz | Shot 020 PG1=.002 Plasma good current rise |
| Feb 19 1998 05:09:27:910PM | 980219021 | John Goetz | Shot 021 no changes Plasma good current rise |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:31:24:750AM | Plasma | Ok | |
| 2 | 08:43:57:480AM | Plasma | Ok | |
| 3 | 10:52:30:150AM | Test | Ok | oh coax test shot only, good readings |
| 4 | 11:03:32:120AM | Plasma | Ok | |
| 5 | 11:31:07:270AM | Plasma | Ok | |
| 6 | 12:01:10:290PM | Plasma | Ok | |
| 7 | 12:44:37:590PM | Plasma | Ok | Back to 5.4tesla to check scan temps |
| 8 | 02:21:59:700PM | Plasma | Ok | |
| 9 | 02:30:24:750PM | Plasma | Ok | |
| 10 | 02:48:09:100PM | Plasma | Ok | |
| 11 | 03:00:14:940PM | Plasma | Ok | |
| 12 | 03:12:07:620PM | Plasma | Ok | |
| 13 | 03:23:51:110PM | Plasma | Ok | |
| 14 | 03:43:46:280PM | Plasma | Ok | |
| 15 | 03:58:45:150PM | Plasma | Ok | |
| 16 | 04:10:32:640PM | Plasma | Ok | |
| 17 | 04:20:23:920PM | Plasma | Ok | |
| 18 | 04:34:15:920PM | Plasma | Ok | |
| 19 | 04:44:18:650PM | Plasma | Ok | |
| 20 | 04:54:41:700PM | Plasma | Ok | |
| 21 | 05:06:37:650PM | Plasma | Ok | |