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

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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

SLIDE 1

C-Mod Schedule and Capabilities C-Mod Schedule and Capabilities

Jim Irby MIT-PSFC

Ideas Forum 2011

SLIDE 2

Outline

C-Mod Operations

– C-Mod Run Week – Operations Schedule

C-Mod Parameters
Facility/Diagnostics
Data Acquisition

Ideas Forum 2011

Alcator C-Mod

SLIDE 3

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

i i f d C d f 11

First operation of new rotated ICRF antenna end of FY11
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)

Ideas Forum 2011

Limited ICRF heating as we reduce H/(H D)

SLIDE 4

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

Ideas Forum 2011

SLIDE 5

Some C-Mod Parameters

Toroidal field range 2.6 to 8 T Plasma current range 0.2 to 2.016 MA g Density range 2 x1019 to 1 x1021 /m3 Minor radius 0.22 m j di Major radius 0.68 m Volume ~1 m3 Discharge length <5 s Discharge length <5 s Elongation 1.85 Triangularity 0.85

Z (m)

Large range of plasma configurations (USN, LSN, DN, IWL, nose limited) ICRF (50 80 MHz 8 MW source)

Ideas Forum 2011

ICRF (50-80 MHz, 8 MW source) Lower Hybrid (4.6 GHz, 3 MW source)

R (m)

SLIDE 6

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 – Impurity injector PFC i t t ti ( b TC l i t i i )

Couplers

– PFC instrumentation (probes, TCs, calorimeters, imaging) – Edge density reflectometry – Doppler Reflectometry – Fast Ion Diagnostics

New Outer Divertor

– Closed design

Ideas Forum 2011

Closed design – Hot

SLIDE 7

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
Source power 8 MW
Lower Hybrid

New Rotated 4-stap Antenna

– FY2011

Launcher at C-Hor
Source power 3 MW

Pl – Plans

Launcher at B-Hor
Source power 4 MW

2nd LH L h

Ideas Forum 2011

2nd LH Launcher

SLIDE 8

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 W ti t d Li l t – We continue to expand our Linux cluster – Upgrades to C-Mod data servers

All data available all the time

Ideas Forum 2011

All data available all the time