Effect of betatron motion on the septum flux in superslow extraction at the SSC

Author

Newberger, Barry S. ; Shih, H.-J. ; Ellison, J.A.

Author_Institution

Inst. for Fusion Studies, Texas Univ., Austin, TX, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

387

Abstract

A scheme for the superslow extraction of protons from the SSC rings for high energy test beam or precision fixed-target B physics is currently being investigated. The flux onto the extraction septum (a curved Si crystal) is to be generated by diffusion produced by noise injected into the RF system. The extraction rate depends on both the diffusion of the closed orbit (due to dispersion at the crystal) and the horizontal betatron amplitude of the diffusing protons. The diffusion of the closed orbit has previously been described by the one-dimension longitudinal diffusion theory of Dome (1984) and Krinsky and Wang (1982). In this paper, we extend this theory to include the effect of the betatron motion. Comparisons with Monte Carlo tracking simulations are made

Keywords

Monte Carlo methods; beam handling techniques; proton accelerators; storage rings; synchrotrons; Monte Carlo tracking simulations; RF system; SSC; Si; betatron motion; closed orbit; curved Si crystal; diffusion; extraction rate; high energy test beam; horizontal betatron amplitude; one-dimension longitudinal diffusion theory; precision fixed-target B physics; protons; septum flux; superslow extraction; Apertures; Laboratories; Mathematics; Monte Carlo methods; Particle beams; Physics; Protons; Statistical analysis; Superconducting device noise; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.308905

Filename

308905