Effects of vertical aperture on beam lifetime at the Advanced Photon Source (APS) storage ring

Author

Bizek, Hana M.

Author_Institution

Argonne Nat. Lab., IL, USA

Volume

5

fYear

1995

fDate

1-5 May 1995

Firstpage

3418

Abstract

When a positron´s energy deviation δE/E exceeds the RF acceptance, or when it receives an angular kick for the betatron motion that exceeds some limiting admittance, the positron will be lost. The main contributions to the total beam lifetime come from single Coulomb and Touschek scattering. In this report we investigate the dependence of the residual gas pressure and the vertical aperture of the Advanced Photon Source storage ring on the total beam lifetime. We present results of calculating the total beam lifetime as a function of vertical aperture for varying average ring pressure, beam current, and coupling coefficient

Keywords

electron accelerators; particle beam diagnostics; storage rings; APS; Advanced Photon Source; Coulomb scattering; RF acceptance; Touschek scattering; average ring pressure; beam current; betatron motion; coupling coefficient; positron energy; residual gas pressure; total beam lifetime; vertical aperture; Admittance; Apertures; Frequency; Impedance; Laboratories; Light scattering; Optical coupling; Particle scattering; Positrons; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505901

Filename

505901