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Title: Transition Crossing in the RHIC

Technical Report ·
DOI:https://doi.org/10.2172/1119338· OSTI ID:1119338
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Accelerator Development Dept.

This report summarizes the study of various longitudinal problems pertaining to the transition-energy crossing in the proposed Relativistic Heavy Ion Collider. Scaling laws are provided for the effects of chromatic non-linearity, self-field mismatch, and microwave instability. It is indicated that the beam loss and bunch-area growth are mainly caused by the chromatic non-linear effect, which is enhanced by the space-charge force near transition. Computer simulation using the program TIBETAN shows that a "γτ-jump" of about 0.8 unit within a time period of 60 ms is adequate to achieve a "clean" crossing, provided that the remnant voltage of the 160 MHz rf system is less than 10 kV.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC02-98CH10886
OSTI ID:
1119338
Report Number(s):
BNL-101996-2013-IR
Country of Publication:
United States
Language:
English

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