Beam loading compensation of traveling wave linacs through the time dependence of the rf drive

Journal Article · Fri Sep 30 00:00:00 EDT 2011 · American Physical Society

DOI:https://doi.org/10.1103/PhysRevSTAB.14.090402· OSTI ID:1041608

Towne, N; Rose, J

Beam loading in traveling-wave linear accelerating structures leads to unacceptable spread of particle energies across an extended train of bunched particles due to beam-induced field and dispersion. Methods for modulating the rf power driving linacs are effective at reducing energy spread, but for general linacs do not have a clear analytic foundation. We report here methods for calculating how to modulate the rf drive in arbitrarily nonuniform traveling-wave linacs within the convective-transport (power-diffusion) model that results in no additional energy spread due to beam loading (but not dispersion). Varying group velocity, loss factor, and cell quality factor within a structure, and nonzero particle velocity, are handled.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1041608
• Report Number(s): BNL-96771-2012-JA; 39KC02000; TRN: US1202686
• Journal Information: American Physical Society, Vol. 14, Issue 9
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
LINEAR ACCELERATORS
QUALITY FACTOR
RF SYSTEMS
TIME DEPENDENCE
TRAVELLING WAVES
VELOCITY
klystron
convective
adaptively
national synchrotron light source