Title :
Thermal performance of the launcher mirrors in the DIII-D ECH system
Author :
Kajiwara, K. ; Baxi, C.B. ; Callis, R.W. ; Doane, J.L. ; Ellis, R.L. ; Friend, M.E. ; Green, M. ; Gorelov, Y.A. ; Lohr, J. ; Moeller, C.P. ; Pinsker, R.I. ; Ponce, D. ; Prater, R.
Author_Institution :
Oak Ride Inst. for Sci. Educ., Oak Ridge, TN, USA
Abstract :
The DIII-D ECH system includes three launcher assemblies each of which can accommodate the RF beams from two gyrotrons. The launchers use four different designs for the mirrors which focus and direct the beams into the tokamak. The designs use molybdenum brazed to graphite, thin Glidcop or variable thickness Glidcop. A fourth design with laminated Glidcop/stainless steel construction has been operated, but no thermal data are available. All the mirrors operate without active cooling. This paper presents preliminary analyses and measurements of the thermal performance of the three designs for which data have been obtained.
Keywords :
Tokamak devices; graphite; mirrors; molybdenum; plasma radiofrequency heating; thermal analysis; DIII-D ECH system; Mo brazed to graphite; Mo-C; active cooling; gyrotron RF beams; laminated Glidcop/stainless steel construction; launcher assemblies; launcher mirrors; thermal performance; tokamak; variable thickness Glidcop; Assembly systems; Cooling; Gyrotrons; Mirrors; Performance analysis; Radio frequency; Steel; Structural beams; Thermal variables measurement; Tokamaks;
Conference_Titel :
Infrared and Millimeter Waves, 2002. Conference Digest. Twenty Seventh International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7423-1
DOI :
10.1109/ICIMW.2002.1076143
