| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Earl Marmar |
| Physics operator(s): | Ian Hutchinson |
| Engineering operator(s): | Ed Fitzgerald,Bill Parkin,Gary Dekow |
| Engineering Operator Run Comment |
| High Performance with ICRF PO:Hutch SL:Marmar EO:Dekow/Fitzgerald/Parkin |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:25:087PM |
| Author: To Be Determined |
| Session Leader Run Summary 1001013 High Performance MP#248 P.O. Hutchinson S.L. Marmar Today's run is aimed at heating with high power ICRF (> 5 MW) to explore higher pressure, beta_normal, regimes in EDA H-Mode. Summary: We did get up to 5 MW total ICRF, for shortish pulse lengths. H/D was high, rising during the RF to values above 0.1. Shot 2 had a record neutron rate (1.8e14 /s) at the top of one sawtooth. We scanned density (down), and got high central temperatures in H-Mode (~5 keV at top of sawtooth on shot 16), along with big MHD (e.g. shots 14 and 16) which locked and led to disruption. Raising Ip from 1.0 to 1.1 MA (shots 7 and 8) tended to push away from EDA toward ELM-free. ---------------------------------------------------------------------------- 1001013001 marmar SESSION_LEADER Oct 13 2000 9:19:46:296AM . . . . . . . . . . . . . . . . . . . . 1 MA, nl_04=1e20, 5.2 Tesla 2.6 MW from D+E, J tripped early Neutron rate 4e13 (in steady state) H89=1.75 H/D starts at .06 and rises to .1 ----------------------------------------------------------------------------- 1001013002 marmar SESSION_LEADER Oct 13 2000 9:43:54:606AM . . . . . . . . . . . . . . . . . . . . raise Bt to 5.4 Tesla program RF to stay on until 1.5 s got 5 MW total RF power (transiently) Neutron rate peaked at 1.8e14 (at top of the last sawtooth) stored energy touched 230 kJ beta_N hit 1.65 disrupt at 1.12 s ----------------------------------------------------------------------------- 1001013003 marmar SESSION_LEADER Oct 13 2000 9:55:48:076AM . . . . . . . . . . . . . . . . . . . . retry J4 tripped early; tried to restart, but wouldn't stay on disrupt at 1.03 s ----------------------------------------------------------------------------- 1001013004 marmar SESSION_LEADER Oct 13 2000 10:45:10:043AM . . . . . . . . . . . . . . . . . . . . no disruption got 4.5 MW for two short periods neutron rate got to 1.3e14 ----------------------------------------------------------------------------- 1001013005 marmar SESSION_LEADER Oct 13 2000 10:49:40:750AM . . . . . . . . . . . . . . . . . . . . RF power bouncing between 2.5 and 4 MW neutron rate ~5e13 H/D rises to .25 disrupt at 1.35 s ----------------------------------------------------------------------------- 1001013006 marmar SESSION_LEADER Oct 13 2000 12:07:11:060PM . . . . . . . . . . . . . . . . . . . . TMX test ----------------------------------------------------------------------------- 1001013007 marmar SESSION_LEADER Oct 13 2000 12:22:50:466PM . . . . . . . . . . . . . . . . . . . . setup for 1.1 MA, raise plasma 4 mm multiple H-modes and RF trips looking more ELM-freeish (radiated power increasing) H/D goes up to 0.15 ----------------------------------------------------------------------------- 1001013008 marmar SESSION_LEADER Oct 13 2000 1:38:26:576PM . . . . . . . . . . . . . . . . . . . . raise target density to nl_04 =1.0e20 disrupt at 1.07 various RF trips ----------------------------------------------------------------------------- 1001013009 marmar SESSION_LEADER Oct 13 2000 2:18:43:873PM . . . . . . . . . . . . . . . . . . . . go back to 1 MA RF will retune to try to avoid tripping at sawtooth crash Got 4 MW for a longer period 200 kJ stored energy, H89~2 for a while, then D trips briefly and the confinement never recovers ----------------------------------------------------------------------------- 1001013012 marmar SESSION_LEADER Oct 13 2000 3:42:43:013PM . . . . . . . . . . . . . . . . . . . . lower target density (nl_04 to .7e20) dud ----------------------------------------------------------------------------- 1001013013 marmar SESSION_LEADER Oct 13 2000 4:16:53:560PM . . . . . . . . . . . . . . . . . . . . retry got almost 4 MW steady for .33 s neutron rate touches 1e14 central T_e = 4 keV at top of sawtooth ----------------------------------------------------------------------------- 1001013014 marmar SESSION_LEADER Oct 13 2000 4:43:47:606PM . . . . . . . . . . . . . . . . . . . . lower target nl_04 to .6e20 4.1 MW for 70 ms neutron rate = 1e14 ECE saturates at 4.6 keV GPC2 shows a peak of 5 keV at the tops of the sawteeth ----------------------------------------------------------------------------- 1001013015 marmar SESSION_LEADER Oct 13 2000 4:44:34:420PM . . . . . . . . . . . . . . . . . . . . repeat, with attempt for higher RF power disrupt at .67 s ----------------------------------------------------------------------------- 1001013016 marmar SESSION_LEADER Oct 13 2000 5:34:18:936PM . . . . . . . . . . . . . . . . . . . . repeat 4 MW total for 67 ms neutron rate 7e13 TE0 from GPC2 gets to 5.4 keV just before a sawtooth crash H/D up to 0.2 during RF H-Mode looks ELM-freeish - |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:287PM |
| Author: To Be Determined |
| Physop Summary 1001013 High Performance. MP 248 SL Marmar PO Hutch Summary _______ Only limited success today. The RF was able to run above 4MW but not without injections and trips. This may have been because the H/D ration rose during the shot when heating was applied, exceeding 10% after about 1s. The RF performance progressively seemed to degrade during the shot. Nevertheless a number of shots with W over 200kJ were obtained at 1MA. A way of keeping the H/D down is needed, we suspect, before reliable high power RF heating can be obtained. Power supply problems cost considerable time. Cooling was rather slow. RF blew fuses at the end of the run a couple of times. On a couple of disruptive shots the edge of the outer divertor in the direction of j-port glows after the shot (and after launching missiles). Shots 14 and 16 have massive MHD modes that might be interesting. Scorecard _________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.957 1.007 2 1.120 1.013 3 1.034 1.038 4 1.953 1.010 5 1.350 1.007 6 0.000 0.003 7 1.958 1.111 8 1.068 1.108 9 1.935 1.010 10 1.948 1.007 11 1.488 1.005 12 0.000 0.019 13 1.294 1.046 14 1.381 1.041 15 0.686 1.010 16 1.516 1.020 Finished summary for 1001013 Total of 16 shots. 16 shots. 14 plasmas. 0 fizzles. 2 duds. Details _______ ---------------------------------------------------------------------------- 1001013xxx hutch PHYSICS_OPERATOR Oct 13 2000 8:56:52:843AM . . . . . . . . . . . . . . . . . . . . High Performance MP#248 Cold start. Load from 1001011019 Load. ---------------------------------------------------------------------------- 1001013001 hutch PHYSICS_OPERATOR Oct 13 2000 9:22:43:233AM . . . . . . . . . . . . . . . . . . . . Plasma. 2.6MW from D/E. J-port trips early. Early chopper has been lost. Move start to -35ms. Put Chopper V at about 950 at 20ms to bring it on. TF to 153kA. Load. EF4 is -1290, Br offset is .0015 ---------------------------------------------------------------------------- 1001013002 hutch PHYSICS_OPERATOR Oct 13 2000 9:44:51:530AM . . . . . . . . . . . . . . . . . . . . Plasma Disrupts 1.1s. 230kJ achieved but then disrupts. Got 5MW momentarily. Big injection but not obvious why. Siad not to be the antennas. 10 Minutes ECDC (also prior to this shot.) EF4 limit to 10kA. Chopper V to 900. ---------------------------------------------------------------------------- 1001013003 hutch PHYSICS_OPERATOR Oct 13 2000 10:07:26:640AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts again at 1s. D-antenna shows a power glitch and the TV shows an arc at the top. This probably is the cause. Back off somewhat on J to try to get to stay on. Back off on D to avoid arc. ---------------------------------------------------------------------------- 1001013004 hutch PHYSICS_OPERATOR Oct 13 2000 10:37:16:450AM . . . . . . . . . . . . . . . . . . . . Plasma. No disruption. However there was a radiative event that caused a return to L-mode. ECDC. ---------------------------------------------------------------------------- 1001013005 hutch PHYSICS_OPERATOR Oct 13 2000 12:08:29:796PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.35s. J-port stayed on at 1MW. H/D 8% and rising. Power 4MW but later looks as if it is less. Perhaps H/D is so high the absorption is dropping. Move upt from zcur=-.017 to -.013 Ip to 1.1MA. Chopper to 800 at 20ms. ---------------------------------------------------------------------------- 1001013006 hutch PHYSICS_OPERATOR Oct 13 2000 12:08:45:546PM . . . . . . . . . . . . . . . . . . . . Test ---------------------------------------------------------------------------- 1001013007 hutch PHYSICS_OPERATOR Oct 13 2000 12:36:25:750PM . . . . . . . . . . . . . . . . . . . . Plasma. ELM-free H-modes. q=3.5 is presumably the reason. nl04 raised to 1. from .8e20. zcur to -.011. ---------------------------------------------------------------------------- 1001013008 hutch PHYSICS_OPERATOR Oct 13 2000 1:58:12:310PM . . . . . . . . . . . . . . . . . . . . Still ELM-free. Disrupts at 1.1s again. Ip to 1MA. ---------------------------------------------------------------------------- 1001013009 hutch PHYSICS_OPERATOR Oct 13 2000 3:03:08:466PM . . . . . . . . . . . . . . . . . . . . Plasma. Big radiation burst at 1s knocks out of H-mode. Peak W=200kJ. Neutron rate up to 10^14. 4MW. Things go bad after 1s when the H/D=.1 Turn off J-port for a shot to see what happens to H/D. ---------------------------------------------------------------------------- 1001013010 hutch PHYSICS_OPERATOR Oct 13 2000 3:03:31:543PM . . . . . . . . . . . . . . . . . . . . Plasma. H/D still rises. Next shot J-port alone. ---------------------------------------------------------------------------- 1001013011 hutch PHYSICS_OPERATOR Oct 13 2000 3:29:38:780PM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at 1.5s. H/D ratio stays below 10% till 1.3s. Suggests the effect of D/E is worse than J-port in raising the hydrogen. Lower nl04 to .7. ---------------------------------------------------------------------------- 1001013012 hutch PHYSICS_OPERATOR Oct 13 2000 3:53:08:950PM . . . . . . . . . . . . . . . . . . . . Dud. EF4 to -1300A from -1290. ---------------------------------------------------------------------------- 1001013013 hutch PHYSICS_OPERATOR Oct 13 2000 4:16:55:530PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.3s after some injections. 190kJ, from 3.8MW. H/D rises as before. Fast magnetics sees counter 130kHz. ?Quasi-coherent? Poloidal velocity 100km/s! nl04 to .6 ---------------------------------------------------------------------------- 1001013014 hutch PHYSICS_OPERATOR Oct 13 2000 4:39:03:123PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.4s. 200kJ. Big MHD mode that goes at 10kHz for ages and then almost instantaneously slows by a factor of 3 at time .835s, subsequently locking. This mode is really strange. It is 20kHz prior to .8s. Then converts itself into the lower frequency. Repeat. Hope for no MHD mode. ---------------------------------------------------------------------------- 1001013015 hutch PHYSICS_OPERATOR Oct 13 2000 5:04:59:530PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts early at .67s. Brick. ---------------------------------------------------------------------------- 1001013016 hutch PHYSICS_OPERATOR Oct 13 2000 5:06:56:450PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.5s. Missiles from the divertor edge hot spot. Big MHD mode again. Locks at .8s. |
| Session Leader Comments | |||
| Oct 13 2000 09:19:46:297AM | 1001013001 | Earl Marmar | 1 MA, nl_04=1e20, 5.2 Tesla 2.6 MW from D+E, J tripped early Neutron rate 4e13 (in steady state) H89=1.75 H/D starts at .06 and rises to .1 |
| Oct 13 2000 09:43:54:607AM | 1001013002 | Earl Marmar | raise Bt to 5.4 Tesla program RF to stay on until 1.5 s got 5 MW total RF power (transiently) Neutron rate peaked at 1.8e14 (at top of the last sawtooth) stored energy touched 230 kJ beta_N hit 1.65 disrupt at 1.12 s |
| Oct 13 2000 09:55:48:077AM | 1001013003 | Earl Marmar | retry J4 tripped early; tried to restart, but wouldn't stay on disrupt at 1.03 s |
| Oct 13 2000 10:45:10:043AM | 1001013004 | Earl Marmar | no disruption got 4.5 MW for two short periods neutron rate got to 1.3e14 |
| Oct 13 2000 10:49:40:750AM | 1001013005 | Earl Marmar | RF power bouncing between 2.5 and 4 MW neutron rate ~5e13 H/D rises to .25 disrupt at 1.35 s |
| Oct 13 2000 12:07:11:060PM | 1001013006 | Earl Marmar | TMX test |
| Oct 13 2000 12:22:50:467PM | 1001013007 | Earl Marmar | setup for 1.1 MA, raise plasma 4 mm multiple H-modes and RF trips looking more ELM-freeish (radiated power increasing) H/D goes up to 0.15 |
| Oct 13 2000 01:38:26:577PM | 1001013008 | Earl Marmar | raise target density to nl_04 =1.0e20 disrupt at 1.07 various RF trips |
| Oct 13 2000 02:18:43:873PM | 1001013009 | Earl Marmar | go back to 1 MA RF will retune to try to avoid tripping at sawtooth crash Got 4 MW for a longer period 200 kJ stored energy, H89~2 for a while, then D trips briefly and the confinement never recovers |
| Oct 13 2000 03:42:43:013PM | 1001013012 | Earl Marmar | lower target density (nl_04 to .7e20) dud |
| Oct 13 2000 04:16:53:560PM | 1001013013 | Earl Marmar | retry got almost 4 MW steady for .33 s neutron rate touches 1e14 central T_e = 4 keV at top of sawtooth |
| Oct 13 2000 04:43:47:607PM | 1001013014 | Earl Marmar | lower target nl_04 to .6e20 4.1 MW for 70 ms neutron rate = 1e14 ECE saturates at 4.6 keV GPC2 shows a peak of 5 keV at the tops of the sawteeth |
| Oct 13 2000 04:44:34:420PM | 1001013015 | Earl Marmar | repeat, with attempt for higher RF power disrupt at .67 s |
| Oct 13 2000 05:34:18:937PM | 1001013016 | Earl Marmar | repeat 4 MW total for 67 ms neutron rate 7e13 TE0 from GPC2 gets to 5.4 keV just before a sawtooth crash H/D up to 0.2 during RF H-Mode looks ELM free-ish |
| Physics Operator Comments | |||
| Oct 13 2000 08:56:52:843AM | Ian Hutchinson | High Performance MP#248 Cold start. Load from 1001011019 Load. | |
| Oct 13 2000 09:22:43:233AM | 1001013001 | Ian Hutchinson | Plasma. 2.6MW from D/E. J-port trips early. Early chopper has been lost. Move start to -35ms. Put Chopper V at about 950 at 20ms to bring it on. TF to 153kA. Load. EF4 is -1290, Br offset is .0015 |
| Oct 13 2000 09:44:51:530AM | 1001013002 | Ian Hutchinson | Plasma Disrupts 1.1s. 230kJ achieved but then disrupts. Got 5MW momentarily. Big injection but not obvious why. Siad not to be the antennas. 10 Minutes ECDC (also prior to this shot.) EF4 limit to 10kA. Chopper V to 900. |
| Oct 13 2000 10:07:26:640AM | 1001013003 | Ian Hutchinson | Plasma. Disrupts again at 1s. D-antenna shows a power glitch and the TV shows an arc at the top. This probably is the cause. Back off somewhat on J to try to get to stay on. Back off on D to avoid arc. |
| Oct 13 2000 10:37:16:450AM | 1001013004 | Ian Hutchinson | Plasma. No disruption. However there was a radiative event that caused a return to L-mode. ECDC. |
| Oct 13 2000 12:08:29:797PM | 1001013005 | Ian Hutchinson | Plasma. Disrupts at 1.35s. J-port stayed on at 1MW. H/D 8% and rising. Power 4MW but later looks as if it is less. Perhaps H/D is so high the absorption is dropping. Move upt from zcur=-.017 to -.013 Ip to 1.1MA. Chopper to 800 at 20ms. |
| Oct 13 2000 12:08:45:547PM | 1001013006 | Ian Hutchinson | Test |
| Oct 13 2000 12:36:25:750PM | 1001013007 | Ian Hutchinson | Plasma. ELM-free H-modes. q=3.5 is presumably the reason. nl04 raised to 1. from .8e20. zcur to -.011. |
| Oct 13 2000 01:58:12:310PM | 1001013008 | Ian Hutchinson | Still ELM-free. Disrupts at 1.1s again. Ip to 1MA. |
| Oct 13 2000 03:03:08:467PM | 1001013009 | Ian Hutchinson | Plasma. Big radiation burst at 1s knocks out of H-mode. Peak W=200kJ. Neutron rate up to 10^14. 4MW. Things go bad after 1s when the H/D=.1 Turn off J-port for a shot to see what happens to H/D. |
| Oct 13 2000 03:03:31:543PM | 1001013010 | Ian Hutchinson | Plasma. H/D still rises. Next shot J-port alone. |
| Oct 13 2000 03:29:38:780PM | 1001013011 | Ian Hutchinson | Plasma disrupts at 1.5s. H/D ratio stays below 10% till 1.3s. Suggests the effect of D/E is worse than J-port in raising the hydrogen. Lower nl04 to .7. |
| Oct 13 2000 03:53:08:950PM | 1001013012 | Ian Hutchinson | Dud. EF4 to -1300A from -1290. |
| Oct 13 2000 04:16:55:530PM | 1001013013 | Ian Hutchinson | Plasma. Disrupts at 1.3s after some injections. 190kJ, from 3.8MW. H/D rises as before. Fast magnetics sees counter 130kHz. ?Quasi-coherent? Poloidal velocity 100km/s! nl04 to .6 |
| Oct 13 2000 04:39:03:123PM | 1001013014 | Ian Hutchinson | Plasma. Disrupts at 1.4s. 200kJ. Big MHD mode that goes at 10kHz for ages and then almost instantaneously slows by a factor of 3 at time .835s, subsequently locking. This mode is really strange. It is 20kHz prior to .8s. Then converts itself into the lower frequency. Repeat. Hope for no MHD mode. |
| Oct 13 2000 05:04:59:530PM | 1001013015 | Ian Hutchinson | Plasma. Disrupts early at .67s. Brick. |
| Oct 13 2000 05:06:56:450PM | 1001013016 | Ian Hutchinson | Plasma. Disrupts at 1.5s. Missiles from the divertor edge hot spot. Big MHD mode again. Locks at .8s. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:58:11:780AM | Plasma | Ok | |
| 2 | 09:20:58:030AM | Plasma | Ok | |
| 3 | 09:44:34:763AM | Plasma | Ok | |
| 4 | 10:09:23:310AM | Plasma | Ok | |
| 5 | 10:35:38:343AM | Plasma | Bad | EF2U Fault |
| 6 | 11:52:32:513AM | Test | Ok | EF2U PLC test shot |
| 7 | 12:05:20:030PM | Plasma | Ok | |
| 8 | 12:29:43:153PM | Plasma | Bad | EF2U Fault |
| 9 | 01:56:19:107PM | Plasma | Ok | |
| 10 | 02:21:56:153PM | Plasma | Ok | |
| 11 | 02:59:47:780PM | Plasma | Ok | |
| 12 | 03:27:19:653PM | Plasma | Ok | |
| 13 | 03:48:58:873PM | Plasma | Ok | |
| 14 | 04:14:43:840PM | Plasma | Ok | |
| 15 | 04:40:06:483PM | Plasma | Ok | |
| 16 | 05:02:10:560PM | Plasma | Ok | |