Alcator C-Mod FY2005 Level 1 OFES Science Target

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Target: Measure plasma behavior with high-Z antenna guards and input power greater than 3.5 MW.

 

This FY2005 science target addresses issues related to first wall choices, and the trade-offs between low-Z and high-Z materials. This choice can affect many important aspects of tokamak operation, including: impurity content and radiation losses from the plasma; hydrogen isotope content in the plasma and retention in the walls; disruption hardiness of device components. All of these issues are significant when considering choices for next step devices to study burning plasma physics, especially ITER. Definitive experimental results will be compared to model predictions, and will be documented in a Target Completion Report in September, 2005.

 

Quarterly Milestones for target:

 

Q1: Install molybdenum protection tiles on all RF antennas and remove boron-nitride tiles from active MHD antennas. (Dec 31, 2004)

 

Status (21 December 2004): The quarterly milestone is complete.

The milestone completion report can be found at:

http://psfcwww2.psfc.mit.edu/cmod/sciprogram/FY05_level1_targets/q1_complete.pdf

 

Q2: Begin measurements of plasma behavior with all high-Z antenna guards during tokamak operation. (March 31, 2005)

 

Status (18 March 2005): The quarterly milestone is complete.

The milestone completion report can be found at:

http://psfcwww2.psfc.mit.edu/cmod/sciprogram/FY05_level1_targets/q2_complete.pdf

 

 

Q3: Assess operation with significant auxiliary input power for L-Mode and H-Mode plasma regimes. (June 30, 2005)

          Status (22 June 2005): The quarterly milestone is complete.

          The milestone completion report can be found at

  http://psfcwww2.psfc.mit.edu/cmod/sciprogram/FY05_level1_targets/q3_complete.pdf

 

 

Q4: Operate with input power in excess of 3.5 MW, measure plasma behavior, compare with previous operation using boron-nitride protection tiles; document results in a Target Completion Report. (September 30, 2005)

          Status (23 September 2005): The quarterly milestone and the full year target are complete.

          The target completion report can be found at

          http://psfcwww2.psfc.mit.edu/cmod/sciprogram/FY05_level1_targets/fy05_target_complete.pdf

 

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Research supported by USDoE Office of Fusion Energy Sciences