Measurements and corrections of the Recycler lattice at Fermilab

Xiao, Meiqin

Fermi National Accelerator Laboratory

关键词: 43 Particle Accelerators;    Tuning Accelerators;    Accelerators;    Magnets;    Optics;   

DOI  :  10.2172/940423
RP-ID  :  FERMILAB-TM-2412-AD
RP-ID  :  AC02-07CH11359
RP-ID  :  940423

美国|英语

来源: UNT Digital Library

【 摘 要 】

Obit Response Matrix (ORM) Fit method has been successfully used to calibrate linear optics at Recycler Ring at Fermilab. The linear model of the Recycler optics ring has been significantly improved. Based on the build-up model, lattice measurement of the Recycler ring has been done several times, each after some magnets move and the tunes change. Large beta-wave({approx}20%) has been found in horizontal plane after the working point was moved from (0.424,0.434) to (0.456, 0.467) for the reason of lowering the beam instabilities. The source of the beta-wave, and the correction will be presented in this paper. In addition, we found an easy way to extend the tuning range in the recycler lattice. A new application program for adjusting the tunes operationally was introduced and the measured results will be presented.