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Links:
C-Mod website
C-Mod Contacts
Research Program Information
Latest C-Mod Ideas Forum (Apr. 2009)
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A short summary of the expected machine
capabilities/parameters/diagnostics for the FY2011 campaign follows. For more
thorough information, please visit the links to the left.
C-Mod Parameters
- R=68cm, a=22cm
- BT from ~2T to 8T
- IP up to 2 MA
- central ne up to ~1x1021
m-3
- Ti~Te up to ~5 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
- 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
- Laser blow-off impurity injection
- Impurity gas puff system
- Numerous Mo tiles pre-installed
with thick (0.1mm) boron layers
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
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