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Mechanical design and fabrication of the VHF-gun, the Berkeley normal-conducting continuous-wave high-brightness electron source.

Authors :
Wells RP
Ghiorso W
Staples J
Huang TM
Sannibale F
Kramasz TD
Source :
The Review of scientific instruments [Rev Sci Instrum] 2016 Feb; Vol. 87 (2), pp. 023302.
Publication Year :
2016

Abstract

A high repetition rate, MHz-class, high-brightness electron source is a key element in future high-repetition-rate x-ray free electron laser-based light sources. The VHF-gun, a novel low frequency radio-frequency gun, is the Lawrence Berkeley National Laboratory (LBNL) response to that need. The gun design is based on a normal conducting, single cell cavity resonating at 186 MHz in the VHF band and capable of continuous wave operation while still delivering the high accelerating fields at the cathode required for the high brightness performance. The VHF-gun was fabricated and successfully commissioned in the framework of the Advanced Photo-injector EXperiment, an injector built at LBNL to demonstrate the capability of the gun to deliver the required beam quality. The basis for the selection of the VHF-gun technology, novel design features, and fabrication techniques are described.

Details

Language :
English
ISSN :
1089-7623
Volume :
87
Issue :
2
Database :
MEDLINE
Journal :
The Review of scientific instruments
Publication Type :
Academic Journal
Accession number :
26931840
Full Text :
https://doi.org/10.1063/1.4941836