LCLS Injector Straight-Ahead Spectrometer

[摘要] The spectrometer design was modified to allow the measurement of uncorrelated energy spread for the nominal lattice. One bunch from every 120 each second would be sent to the straight ahead spectrometer while the transverse cavity is on. The implementation of this 'stealing mode' will not be available for the LCLS commissioning and the early stage of operation. However, the spectrometer was redesigned to retain that option. The energy feedback relies independently on the beam position of the beam in the dispersive section of dogleg 1 (DL1). The main modification of the spectrometer design is the Pole face rotation of 7.5 degrees on both entrance and exit faces. The location and range of operation of the 3 quadrupoles remains unchanged relative to those of the earlier design.

[发布日期] 2010-12-10

[学科分类] 核物理和高能物理

[关键词] LIGHT SOURCES;FREE ELECTRON LASERS;LINEAR ACCELERATORS;SPECTROMETERS;DESIGN;MODIFICATIONS;OPERATION XFEL