Design and test of a 90 kV, low emittance, gridded electron gun

Author

Read, M.E. ; Ives, R.L. ; Marsden, D. ; Collins, G.

Author_Institution

Calabazas Creek Res. Inc., Plainfield, VT, USA

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

1

Abstract

Calabazas Creek Research Inc. (CCR) developed a 1 A, 90 kV electron gun for use as an injector for accelerators. The gun uses a commercial gridded cathode with an external grid driver to produce 10 ??s-long pulse trains of 1 ns pulses. The pulse train has a repetition frequency of 36.67 MHz. The gun was designed using the trajectory code TRAK, taking advantage of variable mesh sizes to model the cathode-grid region in detail. Optimization of the diode geometry and grid voltage resulted in a calculated normalized emittance of 7 pi mm-mrad, only about twice that of the native diode. Results of the simulations and tests of the gun is reported in this paper.

Keywords

cathodes; electron guns; electron sources; particle beam injection; physics computing; Calabazas Creek Research; TRAK code; cathode-grid region; commercial gridded cathode; diode geometry; grid voltage; gridded electron gun; particle beam injection; voltage 90 kV; Cathodes; Diodes; Electron accelerators; Electron emission; Frequency; Optical pulse generation; Optical pulses; Pulse transformers; Testing; USA Councils;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science - Abstracts, 2009. ICOPS 2009. IEEE International Conference on

Conference_Location

San Diego, CA

ISSN

0730-9244

Print_ISBN

978-1-4244-2617-1

Type

conf

DOI

10.1109/PLASMA.2009.5227532

Filename

5227532