Time-Resolved Emittance Characterization of an Induction Linac Beam using Optical Transition Radiation

Le Sage, G P

Lawrence Livermore National Laboratory

关键词: Lawrence Livermore National Laboratory;    Testing;    X-Ray Radiography;    71 Classical And Quantum Mechanics, General Physics;    43 Particle Accelerators;   

DOI  :  10.2172/15004929
RP-ID  :  UCRL-ID-153254
RP-ID  :  W-7405-ENG-48
RP-ID  :  15004929

美国|英语

来源: UNT Digital Library

【 摘 要 】

An induction linac is used by Lawrence Livermore National Laboratory to perform radiographic testing at the Flash X-ray Radiography facility. Emittance characterization is important since x-ray spot size impacts the resolution of shadow-graphs. Due to the long pulse length, high current, and beam energy, emittance measurement using Optical Transition Radiation is an attractive alternative for reasons that will be described in the text. The utility of OTR-based emittance measurement has been well demonstrated for both RF and induction linacs. We describe the time-resolved emittance characterization of an induction linac electron beam. We have refined the optical collection system for the induction linac application, and have demonstrated a new technique for probing the divergence of a subset of the beam profile. The experimental apparatus, data reduction, and conclusions will be presented. Additionally, a new scheme for characterizing the correlation between beam divergence and spatial coordinates within the beam profile will be described.