C-Mod Schedule and Capabilities C-Mod Schedule and Capabilities Jim - PowerPoint PPT Presentation

C-Mod Schedule and Capabilities C-Mod Schedule and Capabilities Jim Irby MIT-PSFC Ideas Forum 2011

Outline • C-Mod Operations – C-Mod Run Week – Operations Schedule • C-Mod Parameters • Facility/Diagnostics • Data Acquisition Alcator C-Mod Ideas Forum 2011

C-Mod Operations • C-Mod run week – Monday maintenance y – Plasma operation Tue to Fri – Cell closed 08:30 to 17:00 • 15 research run weeks in FY11 (7.3 completed) • Up-to-Air March to June 2011 • First operation of new rotated ICRF antenna end of FY11 i i f d C d f 11 • Plasma conditioning periods are a very useful time for g p y bringing diagnostics and other new systems on-line – Approx 4-weeks of operation – Limited ICRF heating as we reduce H/(H+D) Limited ICRF heating as we reduce H/(H D) Ideas Forum 2011

http://www.psfc.mit.edu/research/alcator/facility/Operations/ops_122010.pdf Ideas Forum 2011

Some C-Mod Parameters Toroidal field range 2.6 to 8 T Plasma current range g 0.2 to 2.016 MA 2 x10 19 to 1 x10 21 /m 3 Density range Minor radius 0.22 m Major radius j di 0.68 m ~1 m 3 Volume Discharge length Discharge length <5 s <5 s Elongation 1.85 Z (m) Triangularity 0.85 Large range of plasma configurations (USN, LSN, DN, IWL, nose limited) ICRF (50 80 MHz 8 MW source) ICRF (50-80 MHz, 8 MW source) Lower Hybrid (4.6 GHz, 3 MW source) R (m) Ideas Forum 2011

Engineering and Diagnostic Systems • Upper Chamber Cryopump • Long pulse DNB • Recent and Planned Diagnostic Upgrades (limited list) – Improved MSE capability – Improved CXRS systems Improved CXRS systems – Polarimetry Couplers – Impurity injector – PFC instrumentation (probes, TCs, calorimeters, imaging) PFC i t t ti ( b TC l i t i i ) – Edge density reflectometry – Doppler Reflectometry – Fast Ion Diagnostics • New Outer Divertor – Closed design Closed design – Hot Ideas Forum 2011

RF Capability • ICRF – FY2011 to FY2012 • Two 2-strap antennas Two 2 strap antennas • One 4-strap antenna • Source power 8 MW – Plans • Two 4-strap antennas New Rotated 4-stap Antenna • Source power 8 MW • Lower Hybrid – FY2011 • Launcher at C-Hor • Source power 3 MW – Plans Pl • Launcher at B-Hor • Source power 4 MW 2 nd LH L 2 nd LH Launcher h Ideas Forum 2011

Data System • An extensive set of web based tools for integrating and interrogating information from mini-proposals, run plans and summaries, shot logs and run comments from the electronic logbook is available – These tools improve the efficiency of post-run analysis These tools improve the efficiency of post run analysis – They also allow campaign status information to be easily obtained • All data acquisition and between-shot analysis is done by Linux based computing systems – We continue to expand our Linux cluster W ti t d Li l t – Upgrades to C-Mod data servers • All data available all the time • All data available all the time Ideas Forum 2011