1 / 7

Summary of RF Work To Date

NSTX. Supported by. Summary of RF Work To Date. G. Taylor. NSTX Monday Physics Meeting June 21, 2010. RF Operations Summary - I. 5.5 days of RF operations in June On June 3 ran 2.5 hours RF vacuum conditioning in evening: Reached 19-21 kV on all sources

xaria
Download Presentation

Summary of RF Work To Date

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NSTX Supported by Summary of RF Work To Date G. Taylor NSTX Monday Physics Meeting June 21, 2010

  2. RF Operations Summary - I • 5.5 days of RF operations in June • On June 3 ran 2.5 hours RF vacuum conditioning in evening: • Reached 19-21 kV on all sources • On June 7 ran XMP-26 with -90o phasing (kf=-8 m-1): • 2.2 MW for 200 ms into He OH plasma, shorter pulses up to 3 MW • 2.2 MW for 160 ms into D NBI H-mode plasma • On June 8 ran XMP-26 with kf=-8 m-1 & -150o phasing (kf=-13 m-1) • Started with 1 hour of vacuum conditioning, reached 19-21 kV on all sources • 2.2 MW of kf=-8 m-1 for 200 ms into He OH plasma, Te(0) = 3 keV • 1.4 MW of kf=-8 m-1 for 200 ms into D NBI H-mode • 0.9 MW of kf=-13 m-1 for 80 ms in D NBI H-mode • 1.5 run days (1 day SFSU & 0.5 days WPI)

  3. RF Operations Summary - II • June 9 ran XMP-26 at kf=-8 m-1: • 2.1 MW of kf=-8 m-1 for 200 ms into D NBI H-mode (Also 2.7 MW for 100 ms & 2.9 MW for 50 ms) • Completed 4 shots of XP-1017 “RF Divertor Heating”, ran at 4.5 and 5.5 kG • June 11 ran 2 hrs of XMP-26, mostly at kf=-13 m-1: • 2.1 MW of kf=-8 m-1 for 160 ms into D NBI H-mode • 1.1 MW of kf=-13 m-1 for 130 ms into D NBI H-mode • June 14 ran XMP-26, mostly at 180o phasing (kf= 14 m-1 + 18 m-1), kf=-13 m-1, and kf=-8 m-1: • Struggled to couple 0.4 MW at kf= 14 m-1 + 18 m-1 into D NBI H-mode • 1.6 MW of kf=-13 m-1 for 170 ms into D NBI H-mode • Ran Ip = 300 kA plasmas for XP-1009 at the end of the day and got good heating and H-mode with 1.4 MW of kf=-8 m-1 for 200 ms

  4. Best RF Pulse Obtained with kf = -8 m-1 Heating on June 9

  5. Large Increase in Te(0) & Pe(0) with 1.4 MW of kf=-8 m-1 heating of Ip= 300 kA Deuterium Plasma

  6. RF Operations Summary - III • June 17 ran XMP-26 at kf=-8 m-1: • 1.4 MW for only 170 ms into D NBI H-mode • Lots of trips when we tried to run above 1.4 MW into D NBI H-mode • Ran a few shots of XP-1017 “RF Divertor Heating” at 4.5 and 5.5 kG • June 18 ran 3 hours of vacuum conditioning: • Antenna was badly de-conditioned • Took 3 hours to reach 14-15 kV on all sources • Large increase in pressure during conditioning

  7. Divertor Heating vs Magnetic Field Pitch B=5.5 kG, Ip=0.8 MA B=4.5 kG, I=0.8 MA B=4.5 kG, Ip=0.9 MA B=4.5 kG, Ip=1.0 MA

More Related