POISSON study of electrostatic septa for the MIT-Bates SHR

Author

Farkhondeh, Manouchehr

Author_Institution

Bates Linear Accel. Center, MIT, Middleton, MA, USA

fYear

1991

fDate

6-9 May 1991

Firstpage

990

Abstract

The POISSON group of computer codes was used to study the details of field distributions of electrostatic septa for use with the MIT-Bates South Hall Ring (SHR). Studies were made to minimize field penetration and field gradients near the foil strips while satisfying the technical constraints. In addition, effects of upstream guard foils and an additional electrode opposite these foils on the field shapes were studied in great detail. The guard foils will shadow the main foils from the direct beam, and the electrode will prevent the secondary low-energy electrons from the guard foils from reaching the anode. The optimal configuration of foils and electrodes as well as the electric field shapes are presented.<>

Keywords

beam handling equipment; electron accelerators; storage rings; synchrotrons; MIT-Bates South Hall Ring; POISSON group; computer codes; electrostatic septa; field distributions; field gradients; field penetration; foil strips; secondary low-energy electrons; upstream guard foils; Anodes; Carrier confinement; Electrodes; Electron beams; Electrostatics; Geometry; Optical distortion; Shape; Strips; Structural beams;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0135-8

Type

conf

DOI

10.1109/PAC.1991.164514

Filename

164514