Longitudinal space-charge effects in a retarding field energy analyzer

Author

Zou, Y. ; Cui, Y. ; Haber, I. ; Reiser, M. ; O´Shea, P.G.

Author_Institution

Inst. for Res. in Electron. & Appl. Phys., Maryland Univ., College Park, MD, USA

Volume

1

fYear

2003

fDate

12-16 May 2003

Firstpage

511

Abstract

Experimental and theoretical work has been carried out to study the longitudinal space-charge effects in a retarding field energy analyzer. A one-dimensional model for both a mono-energetic beam and a thermal beam has been developed for this purpose. The study shows that, if the current density inside the device were higher than a critical value, the longitudinal space-charge effects would distort the measured energy spectrum. The measured mean energy will be shifted toward the low-energy side and the resulting spectrum will have a tail at the high-energy side. The measured FWHM and rms energy spread may also be affected.

Keywords

electron accelerators; particle beam diagnostics; space charge; storage rings; current density; longitudinal space-charge effects; low-energy side; mean energy; mono-energetic beam; one-dimensional model; retarding field energy analyzer; thermal beam; Current density; Current measurement; Density measurement; Distortion measurement; Energy measurement; Ion sources; Particle beams; Tail; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288963

Filename

1288963