Miniproposals

Miniproposal: 695 Date Filed: 5/3/2012 Title: Fast ion production and transport in (3^He) minority heating and mode conversion First Author: Ken Liao Session Leader: Ken Liao (shots 1-1)

Engineering Operator Run Comment

MP 695: Fast ion production and transport in D(3He) minority heating and

Session Leader Plans

Entered: Sep 27 2012 05:51:19:910PM

Author: Ken Liao

MP 695: Fast ion production and transport in D(3He) minority heating and mode conversion. Required systems: DNB, ICRF (50MHz J) Desired Diagnostics: TS, GPC, GPC2, FRCECE, PCI, HIREX Enable He3 (15 psi) on B-side upper Argon on H-bottom for HIREX Use equilibrium from 1120927017. B_T = 5.5T (50MHz resonance near 0.76m) J port dipole phasing 1. threshold of mode conversion Start with 150ms He3 puff and scan downward until we get strong minority heating Ip = 1000 kA, nl04 = 0.5 m-2, PICRF = 3 MW (J-port 1MW), He3 puff = 150, 100, 50, ... 2. minority heating power scan Ip = 1000 kA, nl04 = 0.5 m-2, He3 puff = chosen from best heating above a. J-port off, D+E = 3MW b. J-port 0.5MW, D+E = 2.5MW c. J-port 1.25MW, D+E 1.75MW d. J-port 1.0MW, D+E = 0 3. plasma current scan Ip = 800, 1200 kA, nl04 = 0.5 m-2, PICRF = 3 MW, He3 puff = chosen from above 4. resonance position scan Ip = 1000 kA, nl04 = 0.5 m-2, PICRF = 3 MW, B_T = 4.8T, 5.3T 5. Locked mode shot for HIREX 6. density scan Ip = 1000 kA, nl04 = 0.7, 0.9 m-2, PICRF = 3 MW, B_T = 5.5T 7. Install 40 psi He in B-side main. Do a Helium main ion shot for calibration. No change in equilibrium. nl04 = 0.6. no ICRF.

Entered: Sep 28 2012 03:25:33:883AM

Author: Darin Ernst

MP721 Controlling sawteeth and fluctuations in I-Mode with modulated off-axis mode conversion heating THIS SETUP IS FOR A POSSIBLE CONTINGENCY RUN FRI 9/28/12 AFTERNOON OR AS SCHEDULED SAT 9/29/12 MORNING REQUIRED SYSTEMS: RF D,E, 50 MHZ J (DNB if avail.), LBO Ca DIAGNOSTICS: TS, HIREX SR., GPC, GPC2, TCI, EDGE CXRS, Bolo, AXUV, MSE if avail., Polarimeter, Fast TCI, LH reflectometer, microwave reflectometer, SOL Ti probes, Mirnovs, PCI Special request: (similar to MP721 on 09/27/12) B-side-upper 15 PSI He3 Hybrid Enabled (PG2) fill B-side lower with 2 psi Ne Hybrid DISABLED (PG1) fill H-bottom with 1 psi Ar Hybrid enabled(PG5) F-port plenum with 10 psi D2 for NINJA C-port plenum with 10 psi D2 for NINJA D2 puff required from NINJA LFS/HFS Ar puff required (H-bottom) Also possible Ne puff (B-side lower) Shaping same as 1120907028 J-port heating phasing Bt = 6.1 to 6.3 T nHe3/ne ~ 20-30% (100ms to 150ms puff) This will place 80MHz D,E minority resonance near LFS half-radius. In MC dominated regime, the J-port 50 MHz He3 MC layer will also fall near the LFS half-radius. Tentatively D,E will be ramped to establish I-Mode, then J will be added with modulation roughly 50ms on/50ms off. Ip = 1.1 MA nl04 ~ 0.8 Full RF power 1. Locked mode for HIREX Sr. if needed 2. Establish off-axis heated I-Mode with J modulation 50ms on/50 ms off 3. Add NINJA, LBO, optimize more details to come...

Physics Operators Plans

Entered: Sep 27 2012 06:05:59:120PM

Author: Jim Irby

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120927017 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 2 psi Ne Hybrid DISABLED (PG1) *** Top-up B-side upper to 15 PSI Helium-3, Hybrid enabled (PG2) *** fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill H-bottom with 1 psi Ar Hybrid enabled(PG5) leave B-div as is Hybrid DISABLED (PG6) leave H-div as is Hybrid DISABLED (PG7) fill NINJA F-port with 10 psi D2 DISABLED fill NINJA C-port with 10 psi D2 DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): yes Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Physics Operator Summaries

Session Leader Comments
Sep 28 2012 09:51:23:783AM		Ken Liao	After discussion, this run will be postponed until Monday to allow the J antenna to be reconfigured. We have gotten permission to move two run days from FY12 into FY13 next week.
Sep 28 2012 09:53:15:737AM		Ken Liao	DNB is having some problems. Inverters 5 and 7 have failed and Granetz is removing the trigger fibers to prevent 5 and 7 from inducing faults in the other inverters. After the triggers to 5 and 7 were removed, the beam performed mostly cleanly at 35kV, 5A, 75/25 timing for 10 pulses.
Oct 2 2012 02:44:14:330PM	1120928022	Darin Ernst	EXCELLENT. No RF faults to speak of, got nice 10% modulation on Te0. Didn't get I-mode well established until 0.85 sec, so start modulation 0.8sec. Continue modulation until end of RF. No LBO NINJA He4 at 1.2 NINJA D at 1.1
Oct 2 2012 02:45:16:130PM	1120928022	Darin Ernst	EXCELLENT. No RF faults to speak of, got nice 10% modulation on Te0. Didn't get I-mode well established until 0.85 sec, so start modulation 0.8sec. Continue modulation until end of RF. No LBO NINJA He4 at 1.3 NINJA D at 1.1

Physics Operator Comments
Sep 28 2012 08:41:01:550AM	1120928001	Jim Irby	load from 1120927017 import seg 1 to seg 1 from 1120927035 prepuff 24 ms Otd seg 2 gas: pg1 300 to 400 ms 2 psi Neon pg2 400 to 500 ms 15 psi He3 pg3 500 to 1500 ms 40 psi D2 pg4 off --- prepuff pg5 300 to 400 ms 1 psi Ar TF from 149740 to 153935 A --- 5.1 to 5.5 T Otd
Sep 28 2012 08:56:24:577AM	1120928001	Jim Irby	***************************************** We have discovered a phasing problem with the J-Port antenna. We are considering whether to fix it or continue with the run today. Should know soon. *****************************************
Sep 28 2012 09:56:54:753AM	1120928001	Jim Irby	******************************************************** Run Canceled --- Fix j-port ---- run on Mon/Tue ******** ********************************************************

Engineering Operator Comments
Shot	Time	Type	Status	Comment