Title :
POISSON study of electrostatic septa for the MIT-Bates SHR
Author :
Farkhondeh, Manouchehr
Author_Institution :
Bates Linear Accel. Center, MIT, Middleton, MA, USA
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;
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
DOI :
10.1109/PAC.1991.164514
