Construction of 714 MHz HOM-free accelerating cavities

Shogo Sakanaka; Fujio Hinode; Kiyoshi Kubo; Junji Urakawa

doi:10.1107/S0909049597015343

Construction of 714 MHz HOM-free accelerating cavities

Shogo Sakanaka, Fujio Hinode, Kiyoshi Kubo, Junji Urakawa

Research Center for Electron Photon Science (ELPH)

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A new 'higher-order-mode (HOM)-free' accelerating cavity has been developed which can provide an accelerating voltage of more than 400 kV per cavity at a frequency of 714 MHz. The harmful HOMs in the cavities, which can induce beam instabilities at high beam currents, were heavily damped by using four special waveguide ports and broadband microwave loads. Two cavities of this design were installed in the 1.54 GeV accelerator test facility (ATF) damping ring at KEK, and successfully stored beams. This cavity will also be very useful for synchrotron light sources. The basic design, characteristics of HOMs and construction of this cavity are reported.

Original language	English
Pages (from-to)	386-388
Number of pages	3
Journal	Journal of Synchrotron Radiation
Volume	5
Issue number	3
DOIs	https://doi.org/10.1107/S0909049597015343
Publication status	Published - 1998 May 1

Keywords

Coupled-bunch instabilities
Damped cavities
HOM-free cavities
Higher-order modes

ASJC Scopus subject areas

Radiation
Nuclear and High Energy Physics
Instrumentation

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10.1107/S0909049597015343

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AU - Sakanaka, Shogo

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AU - Kubo, Kiyoshi

AU - Urakawa, Junji

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AB - A new 'higher-order-mode (HOM)-free' accelerating cavity has been developed which can provide an accelerating voltage of more than 400 kV per cavity at a frequency of 714 MHz. The harmful HOMs in the cavities, which can induce beam instabilities at high beam currents, were heavily damped by using four special waveguide ports and broadband microwave loads. Two cavities of this design were installed in the 1.54 GeV accelerator test facility (ATF) damping ring at KEK, and successfully stored beams. This cavity will also be very useful for synchrotron light sources. The basic design, characteristics of HOMs and construction of this cavity are reported.

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KW - Higher-order modes

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Construction of 714 MHz HOM-free accelerating cavities

Abstract

Keywords

ASJC Scopus subject areas

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