Application of Non-Linear Time-Domain RF Simulations to Longitudinal Emittance Studies for the LHC

Conference · Fri May 15 04:00:00 EDT 2009

OSTI ID:952975

Mastorides, T; Rivetta, C; Fox, J D; Winkle, D Van

A non-linear time-domain simulation has been developed that can determine technical limitations, effects of non-linearities and imperfections, and impact of additive noise on the interaction of the beam with the Impedance Control Radio Frequency (RF) systems [1]. We present a formalism for the extraction of parameters from the time domain simulation to determine the sensitivity of the beam longitudinal emittance and dilution on the RF system characteristics. Previous studies [2], [3] have estimated the effect of a noise source on the beam characteristics assuming an independent perturbation source of the RF voltage and a simplified beam model with no coupling. We present the methodology for the time-domain simulation study of the dependence of the accelerating voltage noise spectrum on the various RF parameters and the technical properties (such as non-linearities, thermal noise, frequency response etc.) of the Low Level RF (LLRF) system components. Future plans to expand this formalism to coupled bunch studies of longitudinal emittance growth in the LHC at nominal and upgraded beam currents are briefly summarized.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 952975
• Report Number(s): SLAC-PUB-13631
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ADDITIVES
Accelerators
ACCPHY
ACCSYS
BEAM CURRENTS
DEFECTS
DILUTION
IMPEDANCE
RF SYSTEMS
SENSITIVITY
SIMULATION