Capture from pair production as a beam loss mechanism for heavy ions at RHIC

Conference · Thu May 01 04:00:00 EDT 1997

OSTI ID:491612

Feinberg, B; Belkacem, A; Claytor, N; Dinneen, T; Gould, H ^[1]

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1. Lawrence Berkeley National Lab., CA (United States). Accelerator and Fusion Research Div.

Electron capture from electron-positron pair production is predicted to be a major source of beam loss for the heaviest ions at RHIC. Achieving the highest luminosity thus requires an understanding of the capture process. The authors report measurements of this process at Brookhaven National Laboratory`s AGS using 10.8 GeV/nucleon Au{sup 79+} projectiles on Au targets. Capture from pair production is a process in which the very high electromagnetic field involved in the collision of two relativistic heavy ions results in the production of an electron-positron pair with the capture of the electron by one of the ions. There are many theoretical papers published on capture from pair production with discrepancies between predicted cross sections. The experimental results are compared to theory and to previous experiments at 1 GeV/nucleon. The implications of extrapolations to RHIC energies are presented.

• Research Organization: Lawrence Berkeley National Lab., CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 491612
• Report Number(s): LBNL--40002; CONF-970503--45; ON: DE97006558
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BROOKHAVEN RHIC
DESIGN
ELECTRON CAPTURE
HEAVY IONS
ION BEAMS
LIFETIME
LOSSES
PERFORMANCE