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Lattices for High-power Proton Beam Acceleration and Secondary Beam Collection and Cooling
C. GARDNER
K. BROWN
S. WANG
Y. Y. LEE
J. WEI
N. SIMOS
S. PEGGS
D. LOWENSTEIN
出版
Brookhaven National Laboratory
, 2006
URL
http://books.google.com.hk/books?id=mxGBAQAACAAJ&hl=&source=gbs_api
註釋
Rapid cycling synchrotrons are used to accelerate high-intensity proton beams to energies of tens of GeV for secondary beam production. After primary beam collision with a target, the secondary beam can be collected, cooled, accelerated or decelerated by ancillary synchrotrons for various applications. In this paper, we first present a lattice for the main synchrotron. This lattice has: (a) flexible momentum compaction to avoid transition and to facilitate RF gymnastics (b) long straight sections for low-loss injection, extraction, and high-efficiency collimation (c) dispersion-free straights to avoid longitudinal-transverse coupling, and (d) momentum cleaning at locations of large dispersion with missing dipoles. Then, we present a lattice for a cooler ring for the secondary beam. The momentum compaction across half of this ring is near zero, while for the other half it is normal. Thus, bad mixing is minimized while good mixing is maintained for stochastic beam cooling.
