TY - JOUR
T1 - Hydrogen control in Alcator C-Mod walls and plasmas
AU - Lin, Y.
AU - Irby, J.
AU - Lipschultz, B.
AU - Marmar, E.
AU - Wolfe, S.
AU - Wukitch, S.
AU - Whyte, D.
PY - 2007/6/15
Y1 - 2007/6/15
N2 - The control of the hydrogen fraction in D plasmas [H/(H+D)] is necessary for efficient ICRF minority heating in Alcator C-Mod. Boronizing the chamber when H/(H+D) ∼ 10% would promptly lower H/(H+D) to ∼5%. However, the reduction was transitory when the accumulated boron layer was thick (>6 μm) and with boron nitride tiles protecting the ICRF antennas, indicating that the H buried under a new B layer diffused back to the surface over time. Prior to the 2005 campaign, all boron on molybdenum tiles and surfaces was removed. Boronization was performed only after H/(H+D) was down to
AB - The control of the hydrogen fraction in D plasmas [H/(H+D)] is necessary for efficient ICRF minority heating in Alcator C-Mod. Boronizing the chamber when H/(H+D) ∼ 10% would promptly lower H/(H+D) to ∼5%. However, the reduction was transitory when the accumulated boron layer was thick (>6 μm) and with boron nitride tiles protecting the ICRF antennas, indicating that the H buried under a new B layer diffused back to the surface over time. Prior to the 2005 campaign, all boron on molybdenum tiles and surfaces was removed. Boronization was performed only after H/(H+D) was down to
UR - http://www.scopus.com/inward/record.url?scp=34248573806&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2007.01.115
DO - 10.1016/j.jnucmat.2007.01.115
M3 - Article
AN - SCOPUS:34248573806
SN - 0022-3115
VL - 363-365
SP - 920
EP - 924
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -