Design of a prototype precision positioning system for the undulators of the Linac Coherent Light Source.
A precision positioning system has been designed for the Linac Coherent Light Source (LCLS) and a prototype system is being fabricated. The LCLS will use a beam-based alignment technique to precisely align all of the segments of the 131.52-m-long undulator line. The requirement for overlap between the electron beam and the x-ray beam, in order to develop and maintain lasing, demands that each quadrupole must be aligned within a tolerance of {+-} 7 {micro}m and that undulator axes must be positioned within 5 {micro}m vertically and 10 {micro}m horizontally. Five cam movers, each with an eccentricity of 1.2 mm, will allow adjustment of a cradle supporting the undulator, its vacuum chamber, a quadrupole, and a beam position monitor. An additional motion transverse to the beam axis allows removal of individual undulators from the beam path. Positioning feedback will be provided by a wire position monitor system and a hydrostatic leveling system.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 925260
- Report Number(s):
- ANL/XFD/CP-116266
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Commissioning a Vibrating Wire System for Quadrupole Fiducialization
Fast Beam-Based BPM Calibration