Serial testing of XFEL cryomodules: results of the cryogenic heat load measurements

[摘要] The European X-ray Free Electron Laser (XFEL) is in operation at DESY. The superconducting XFEL linac will produce pulsed electron beam at an energy of 17.5 GeV. The linac consists of 768 superconducting niobium 1.3 GHz nine cell cavities and 96 superconducting magnet packages assembled in 96 cryomodules. Each cryomodule is 12 m long and includes a 2 K helium II bath circuit for the cavities, and 5/8 and 40/80 K thermal radiation shields. Before being installed in the XFEL linac tunnel all cryomodules were tested in the Accelerator Module Test Facility (AMTF.) In this paper methods and results of static and dynamic heat load measurements of all XFEL cryomodules are reported. A comparison with first integral heat load measurements in the XFEL linac is given.

[发布机构] Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, Hamburg; 22607, Germany^1;Instytut Fizyki Jadrowej (IFJ), Polskiej Akademii Nauk (PAN), Krakow; 31-342, Poland^2;Ferchau Engineering GmbH, Butzweilerhof-Allee 4, Köln; 50829, Germany^3

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cell cavity;Dynamic heat;First integral;Helium II;Load measurements;Pulsed electron beams;X-ray free electron lasers