Experimental evidence for beam-beam disruption at the SLC

Author

Barklow, T. ; Bower, G. ; Decker, F.J. ; Field, C. ; Hendrickson, L.J. ; Markiewicz, T. ; McCormick, D.J. ; Minty, M. ; Phinney, N. ; Raimondi, P. ; Ross, M.C. ; Thompson, K.A. ; Usher, T. ; Woodley, M.D. ; Zimmermann, F.

Author_Institution

Linear Accel. Center, Stanford, CA, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

307

Abstract

A significant luminosity enhancement from beam-beam disruption was observed for the first time during the 1997-98 run of the SLAC Linear Collider (SLC). Disruption, or pinch effect, is due to the decrease in effective beam size during collisions as each beam is focused by the field of the other beam. With beam intensities of 4.0 10¹⁰ per bunch, bunch lengths of 1.1 mm, and horizontal and vertical beam sizes of σ_x=1.5 μm and σ_y=0.65 μm, the luminosity increase from disruption was more than 100%. Measured data rates as recorded by the SLD detector were in agreement with the theoretically calculated disruption enhancement

Keywords

electron accelerators; linear colliders; particle beam bunching; particle beam diagnostics; particle beam stability; SLC; beam-beam disruption; bunch length; effective beam size; horizontal beam size; luminosity; pinch effect; vertical beam size; Colliding beam devices; Degradation; Electromagnetic fields; Electromagnetic measurements; Equations; High definition video; Nonlinear distortion; Physics; Storage rings; Superluminescent diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795691

Filename

795691