Tore Supra firstwall conditioning
Tore Supra is a large-size, high-field superconducting tokamak (B(0) = 4.5 T, R = 2.37 m, a = 0.8 m). It started its operation in April 88. Impurity control is mainly based on use of carbon as first wall material: the whole inner wall plus some more modular pump limiters are made of graphite (10 m2). These elements as well as the other first wall parts (made of stainless steel) are actively cooled by high pressure water (T < 250 C, p = 4 MPa). Vessel pumping is achieved by means of 3 turbomolecular pumps (total pumping speed 10 m3/s). Conditioning of the vessel is mainly achieved by glow discharges which proved to be efficient in the first campaign of Tore Supra. They could be analysed quantitatively both by absolutely calibrated mass spectrometry and by in situ sample analysis; the samples can be retracted under vacuum to an analysis chamber equipped with AES (Auger Electron Spectroscopy) and an ion gun for depth analysis. The impurity control of the discharge was monitored with a VUV-X spectrometer.
Bibliographic Reference: Paper presented: 11ème Congrès International du Vide, Köln (DE), Sept. 25-29, 1989
Availability: Available from (1) as Paper EN 35072 ORA
Record Number: 199010034 / Last updated on: 1994-12-01
Original language: en
Available languages: en