Evolution of the 400 MeV linac design

Abstract

The basic premises of the conceptual design for the linac upgradc 1 are pursued to establish lengths, gradients, power dissipation, etc. for the 400 Me V linac and matching section. The discussion is limited to accelerating and focusing components. Whexcvcr values depend on the choice of the accelerating structure, the disk-and-washer structure is emphasizedj the results are generally relevcnt to the side coupled cavity choice also. 1 TewatJ"on Upg7'atle-Linae Conceptual Deaign, Fermilab 1 April 1987 2!nitall.y 1 Al Moretti, principally Leroy L&l'l'y for the DAW structure, and more recently Tom Jurgens for the SCC 11tructure. 3 e.g., E. A. Knapp et al., Rev. Sci. Inst.,SO no. 7(7/68) 4 R. K. Cooper et aL, Radio-Frequency Structure Devdopment for the Los Alamos/NBS Racetrack. Microtron, LA-UR-83-95 1 Loa Alam.011 Natl. Lab(l/83) and references cited therein

Parallel Algorithms for Collective Processes in High Intensity Rings

“…The transverse impedance model in ORBIT [3] is based on an approach previously implemented in the longitudinal impedance model [5], which calculates the longitudinal kick by summing products of Fourier coefficients of the current with the corresponding impedance values, all taken at harmonics of the ring frequency [6]. A complication with the transverse impedance model arises due to the betatron motion, which has much higher frequency than synchrotron motion.…”