FXR LIA Optimization - Time-resolved OTR Emittance Measurement

Jacob, J ; Ong, M ; Wargo, P ; LeSage, G

Lawrence Livermore National Laboratory

关键词: Lawrence Livermore National Laboratory;    Tuning;    X-Ray Radiography;    43 Particle Accelerators;    Transition Radiation;   

DOI  :  10.2172/878191
RP-ID  :  UCRL-TR-214037
RP-ID  :  W-7405-ENG-48
RP-ID  :  878191

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Flash X-Ray Radiography (FXR) facility at Lawrence Livermore National Laboratory utilizes a high current, long pulse linear induction accelerator to produce high doses of x-ray radiation. Accurate characterization of the transverse beam emittance is required in order to facilitate accelerator modeling and tuning efforts and, ultimately, to optimize the final focus spot size, yielding higher resolution radiographs. In addition to conventional magnet scan, pepper-pot, and multiple screen techniques, optical transition radiation (OTR) has been proven as a useful emittance measurement diagnostic and is particularly well suited to the FXR accelerator. We shall discuss the time-resolved emittance characterization of an induction linac electron beam using OTR, and we will present our experimental apparatus and analysis software. We shall also develop the theoretical background of beam emittance and transition radiation.