Alcator C-Mod 2011 Ideas Forum

Home Facility Capabilities Task Force Areas Submission of Ideas Forum Agenda Presenting Remotely Directions + Lodgings C-Mod Contacts Research Program Information Previous Ideas Forum (April 2009)

Facility capabilities A short summary of the expected machine capabilities/parameters/diagnostics for the 2010 campaign follows. For more thorough information, please visit the C-Mod website or contact us. C-Mod Parameters BT from ~2T to 8T IP up to 2 MA central ne up to ~1x10^21 m^-3 Ti~Te up to ~9 keV elongation from 0.9 to 1.7 triangularity from ~0.3 to 0.75 single null (lower or upper), double null or limited configuration reversal of BT and IP direction possible for brief periods  Auxiliary Plasma Heating/Current Drive Capabilities: ICRH: routine net power up to 5MW. Source freq. variable from 40 to 80MHz. Heating or current drive phasing. Fast-ferrite tuner for real-time ICRF tuning Lower Hybrid wave launcher with source power up to 3 MW, ~1.5MW power coupled to plasma Additional operating features Long-pulse diagnostic neutral beam (1.5 sec duration) External correction coils (A-coils) for non-axisymmetric field studies and locked mode amelioration Active MHD antennas Digital plasma control system for flexible real-time feedback Upper divertor cyropump (~10kL/s pumping speed) Massive impurity gas jet for disruption mitigation studies Li/impurity pellet injection Impurity gas puff system Prototype tungsten lamellae tiles in divertor Numerous Mo tiles pre-installed with thick (0.1mm) boron layers Impurity laser blow off injection system Selected Diagnostics Standard magnetic diagnostics ne(r) via Thomson Scattering, interferometry, and visible bremsstrahlung, Te(r) via Thomson scattering and ECE CXRS measurements of Ti, toroidal and poloidal rotation Core toroidal and poloidal rotation profiles via x-ray spectroscopy Core Ti v profile measurements via x-ray spectroscopy Central Ti from neutron rate Impurity measurements via spectroscopy (x-ray, VUV, visible) Core and edge bolometry Edge Lyman alpha emissivity profiles Density fluctuation measurements via phase contrast imaging, microwave reflectometry Edge and SOL profiles of ne, Te, v||, vperp via reciprocating probes (both high-field and low-field side) SOL fluctuation measurements via probes and light emission Hard x-ray pinhole camera for fast electron measurements Compact neutral particle analyzer Surface science station for deposition studies Divertor IR camera Extensive divertor tile probes, thermocouples Fast camera gas puff imaging