Design and operation of a superconducting quarter-wave electron gun
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Authors
Harris, J.R.
Ferguson, K.L.
Lewellen, J.W.
Niles, S.P.
Rusnak, B.
Swent, R.L.
Colson, W.B.
Smith, T.I.
Boulware, C.H.
Grimm, T.L.
Subjects
Advisors
Date of Issue
2011
Date
Publisher
American Physical Society
Language
Abstract
Superconducting radio-frequency electron guns are viewed by many as the preferred technology for generating the high-quality, high-current beams needed for future high power-free-electron lasers and energy recovery linacs. All previous guns of this type have employed elliptical cavities, but there are potential advantages associated with other geometries. Here we describe the design, commissioning, and initial results from a superconducting radio-frequency electron gun employing a quarter-wave resonator configuration, the first such device to be built and tested. In initial operation, the gun has generated beams with bunch charge is excess in 78 pC, energy of 469 keV, and normalized rms emittances of about 4.9 um. Currently, bunch charge is limited by the available drive laser energy, and beam energy is limited by x-ray production and the available rf power. No fundamental limits on beam charge or energy have been encountered, and no high-field quenching events have been observed.
Type
Article
Description
The article of record as published may be found at: http://dx.doi.org10.1103/PhysRevSTAB.14.053501
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Office of Naval Research and the High Energy Laser Joint Technology Office.
Funding
Format
16 p.
Citation
Physical Review Special Topics - Accelerators and Beams, v. 14, 2011, pp. 053501/1 - 053501-16
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.