High precision SC cavity alignment measurements with higher order modes

被引：10

作者：

Molloy, Stephen ^{[1
]}

Frisch, Josef

McCormick, Douglas

May, Justin

Ross, Marc

Smith, Tonee

Eddy, Nathan

Nagaitsev, Sergei

Rechenmacher, Ron

Piccoli, Luciano

Baboi, Nicoleta

Hensler, Olaf

Petrosyan, Lyudvig

Napoly, Olivier

Paparella, Rita

Simon, Claire

机构：

[1] SLAC, Stanford, CA USA

[2] FNAL, Batavia, IL USA

[3] DESY, Hamburg, Germany

[4] CEA, DSM DAPNIA, Gif Sur Yvette, France

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2007年 / 18卷 / 08期

关键词：

higher order modes; BPM; superconducting cavity;

D O I：

10.1088/0957-0233/18/8/004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experiments at the FLASH linac at DESY have demonstrated that the higher order modes (HOMs) induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The centres of the cavities can be determined from the beam orbit which produces minimum power in the dipole HOM modes. The phase and amplitude of the dipole modes can be used as a high resolution beam position monitor. For most superconducting accelerators, the existing HOM couplers provide the necessary signals, and the downmix and digitizing electronics are straightforward, similar to those for a conventional BPM.

引用

页码：2314 / 2319

页数：6

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