Vertical and Horizontal Test Results of 3.9 GHZ Accelerating Cavities at FNAL.

Khabiboulline, T. ; Edwards, H. ; Foley, M. ; Harms, E. ; Hocker, A. ; Michell, D.

Technical Information Center Oak Ridge Tennessee

关键词: Accelerating cavities;    Vertical tests;    Horizontal tests;    Results;    Fermilab;   

RP-ID  :  DE2008935232

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The 3rd harmonic 3.9GHz accelerating cavity was proposed to improve the beam performance of the VUV FEL, FLASH. In the frame of a collaborative agreement, Fermilab will provide DESY with a cryomodule containing a string of four cavities. Seven 9-cell Nb cavities were tested and six of them did reach accelerating gradient up to 24 MV/m almost twice more than design value of 14 MV/m. Two of these cavities are with new HOM couplers with improved design. In this paper we present all results of the vertical and horizontal tests.