BTA Magnet Field Map Archive and MAD Model

Glenn,J.W.

Brookhaven National Laboratory

关键词: Magnetic Fields;    Excitation;    43 Particle Accelerators;    Quadrupoles;    Brookhaven Ags;   

DOI  :  10.2172/939974
RP-ID  :  BNL--81587-2008-IR
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  939974

美国|英语

来源: UNT Digital Library

【 摘 要 】

This note publishes some and information that has resided in private files. The attached tables were provided by Joseph Skelly from his archives. They show magnetic field measurements versus excitation current for the Booster to AGS transfer line quadrupoles and dipoles based on field measurements [we believe] were done by the Magnet Division. Also given are Ed Blesser's fifth order fits of field versus current. The results are given in 'Tesla' or T-M/M. These tables are attached to provide an archive of this data. The MAD model of the BTA line does have the same values as shown in the attached fits so the transfer was correct. MAD uses as its 'gradient' for quads Tesla per meter normalized to rigidity [B-rho]. The model of the BTA line in use uses the T-M/M given in the tables divided by the length to give T M which is then normalized by Brho. Thus, the input to the model appears to be correct. The original model is also attached as part of a memo by Skelly describing it.