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Summary form only given. This paper presents two type of long-pulse 1.3 GHz klystron modulator recently developed for the Superconducting RF Test Facility(STF) at High Energy Accelerator Research Organization(KEK). The STF is a project at KEK to build and operate a test linac with high-gradient superconducting cavities, as a prototype of the main linac systems for International Linear Collider(ILC)...
The R&D of PPM (periodic permanent magnet)-focused X-band (11.424GHz) pulse klystrons in Japan started in 1999, originally for Global Linear Collider (GLC) project. So far six prototype tubes (as named PPM1, ... PPM6) have been built. All these tubes were fabricated by Toshiba Electron Tubes and Devices Co. and tested at KEK. A new project named International Linear Collider started in 2004 and...
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