Fermilab, Batavia, Illinois
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(~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.
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
The 3 GeV RCS(Rapid Cycling Synchrotron) of J-PARC(Japan Protron Accelerator Research Complex) is already in the beam commissioning stage and as designed working as an injector to the 50-GeV MR(Main Ring) as well as delivering stable beam to the spallation neutron target. The overall design strategy together with beam commissioning results of the injection and extraction will be presented.
