Tuning The Laser Heater Undulator

[摘要] The laser heater undulator for the LCLS requires different tuning techniques than the main undulators. It is a pure permanent magnet (PPM) undulator, rather than the hybrid design of the main undulators. The PPM design allows analytic calculation of the undulator fields. The calculations let errors be introduced and correction techniques be derived. This note describes how the undulator was modelled, and the methods which were found to correct potential errors in the undulator. The laser heater undulator for the LCLS is a pure permanent magnet device requiring different tuning techniques than the main undulators. In this note, the laser heater undulator is modelled and tuning techniques to compensate various errors are derived.

[发布日期] 2010-12-03

[学科分类] 核物理和高能物理

[关键词] LIGHT SOURCES;FREE ELECTRON LASERS;LINEAR ACCELERATORS;HEATERS;PERMANENT MAGNETS;TUNING;WIGGLER MAGNETS;MATHEMATICAL MODELS;CORRECTIONS XFEL