Klystron Measurement and Protection System for XFEL on the MTCA.4 Architecture

Le résumé fourni par la source

The European X-ray Free-Electron Laser (XFEL) is under construction at the DESY in Hamburg. The driving engine of the superconducting accelerator will be 27 RF station. Each of an underground RF station consists from multi beam horizontal klystron (MBK) which can provide up to 10MW of power at 1.3GHz, high voltage (HV) pulse transformer (PT) and waveguide distributing system (WDS). The XFEL should work continuously over 20 years with only 1 day per month for maintenance. In order to meet so demanding requirement a lifetime of the key element of RF station the MBK, should be as long as possible. In the real operation the lifetime of the tube can be thoroughly reduced by service conditions. To minimize the influence of service conditions to the klystrons lifetime the special fast protection system named as Klystron Lifetime Management System (KLM) [1] has been developed. The main task of this system is to detect all events which can destroy the tube as fast as possible, then stop input power to the tube and send signal to stop HV pulse. The tube recovery procedure should depend on the kind of events has happened. KLM is based on the standard Low Level RF (LLRF) Mi-cro TCA technology (MTCA.4 or xTCA) [2] system for XFEL with additional DC channels. This article gives an overview of implementation of measurement and protection system installed at klystron test stand.

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