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(ITERP/13) ITER-FEAT Vacuum Pumping and Fuelling R&D Programmes

D. K. Murdoch¹⁾, A. Antipenkov²⁾, J.-C. Boissin¹⁾, C. Day³⁾, H. Haas³⁾, P. Ladd²⁾, A. Mack³⁾, S. Pimanikhin⁴⁾, G. Saksagansky⁵⁾, I. Viniar^6)
 
1) EU-HT, EFDA-CSU, Boltzmannstraße 2, D-85748 Garching, Germany
²⁾ ITER JCT, Garching, Boltzmannstraße 2, D-85748 Garching, Germany
³⁾ EU-HT, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany
⁴⁾ RF-TH, All-Russian Scientific Research Institute of Experimental Physics, Sarov, 607190, Russia
⁵⁾ RF, D.V. Efremov Scientific Research Institute of Electrophysical Apparatus, St. Petersburg, 189631, Russia
⁶⁾ RF-HT, PELIN Laboratory, Ltd., 2, Admiral Makarov Str., Moscow, 125212, Russia

Abstract.  The design of the ITER-FEAT vacuum pumping and fuelling systems is supported by two key R&D programs, the first directed towards the development of a steady state tritium compatible pellet injector, and the second towards the development of a supercritical helium cooled cryogenic pump for torus exhaust. While the pellet injector programme for ITER-FEAT is new, that for the cryopump has evolved from a programme that originally supported the 1998 ITER design. As the plasma exhaust parameters have remained essentially unchanged between these two machines, the R&D conducted to date remains valid. Initial test results on the prototype injector, TPI-1, which included continuous injection of 3 mm hydrogen pellets at 500 m/s and at 1 to 2 Hz for periods up to, are reported. A model of the cryopump has now been installed in a new dedicated test bed at the Karlsruhe Research Centre where acceptance tests have been completed and preliminary results from pumping tests obtained. An extensive test campaign to fully characterise pump performance and identify any mechanical details which require modification has started.

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