Simulations of Merging Helion Bunches on the AGS Injection Porch

Gardner, C. J.¹ 

[1]Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.

关键词: SIMULATION;    BROOKHAVEN AGS;    COMPARATIVE EVALUATIONS;    MAGNETIC FIELDS;    EQUATIONS;    BEAM BUNCHING;    KICKER MAGNETS;    HARMONICS Alternating Gradient Synchrotron;   

DOI  :  10.2172/1157498
RP-ID  :  BNL--106028-2014-IR
RP-ID  :  BNL--C-A/AP/527
PID  :  OSTI ID: 1157498
Others  :  R&D Project: KBCH139
Others  :  18031
Others  :  Other: KB0202011
Others  :  TRN: US1500119

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

During the setup of helions for the FY2014 RHIC run it was discovered that the standard scheme for merging bunches on the AGS injection porch required an injection kicker pulse shorter than what was available. To overcome this difficulty, K. Zeno proposed and developed an interesting and unusual alternative which uses RF harmonic numbers 12, 4, 2 (rather than the standard 8, 4, 2) to merge 8 helion bunches into 2. In this note we carry out simulations that illustrate how the alternative scheme works and how it compares with the standard scheme. This is done in Sections 13 and 14. A scheme in which 6 bunches are merged into 1 is simulated in Section 15. This may be useful if more helions per merged bunch are needed in future runs. General formulae for the simulations are given in Sections 9 through 12. For completeness, Sections 1 through 8 give a derivation of the turn-by-turn equations of longitudinal motion at constant magnetic field. The derivation is based on the work of MacLachlan. The reader may wish to skip over these Sections and start with Section 9.