Development of 120keV 10MW Neutral Beam Teststand

Oka Yoshihide, Okamura Hideo, Kaneko Osamu, Kunibe Toshiju, Kuroda Tsutomu, Sakurai Keiichi

This is a report of design and construction of 120keV, 10MW Neutral Beam Test Stand (10MW NBTS) which has been prepared for the development of NB Injector on R-project in the 1981 to 1982 fiscal year. The Test Stand is designed to simulate NBI on the project and the aim is test for the performance of many components and the over all performance of beam line. A design of the beam line (which is composed of a neutralizer cell, a 180°deflection magnet, calorimeter, and ion dump, etc.), 1/4 size ion source, power supply system, and sequence and control are described, and the test results are also given briefly. Main features of the NBTS are as follows : (1) A powerful ion source of 120keV, 75 A for 1 sec, (2) Gate Turn Off (G.T.0.) accel power supply system of 120kV, 10MW, in which all the components are fabricated by the solid-state elements, (3) highspeed open-type cryocondensation pump for the vacuum system. Test results of each component are compared with the design value of them. Overall test including the beam extraction of up to 120keV, ∿ 20 A for 1 sec is satisfactorily completed by applying 1/4 size model ion source.

Development of 120keV 10MW Neutral Beam Teststand

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