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Demonstration of Plasma Window with 20 mm Diameter and Pressure Separation for Accelerator Applications

Naoya IKOMA^1,2), Yasuto MIYAKE¹⁾, Mamoru TAKAHASHI¹⁾, Hiroki OKUNO¹⁾, Shinichi NAMBA³⁾, Kazumasa TAKAHASHI²⁾, Toru SASAKI²⁾ and Takashi KIKUCHI²⁾

1)

Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan

2)

Graduate School of Engineering, Nagaoka University of Technology, Niigata 940-2188, Japan

3)

Graduate School of Engineering, Hiroshima University, Hiroshima 739-8527, Japan

(Received 5 June 2019 / Accepted 12 July 2019 / Published 9 October 2019)

Abstract

A large diameter plasma window was developed for accelerator applications. In this study, a pressure separation using the plasma window was demonstrated, and the maximum diameter of the plasma window reached up to 20 mm. The prediction formula based on the viscous flow for confinement pressure cannot be applied in the case of large diameters due to low input power density to the plasma.

Copyright (c) 2019 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

plasma window, arc plasma, beam window, target system, accelerator

DOI: 10.1585/pfr.14.1206148

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