Title :
Flexible and telescopic vacuum chambers for the APS bunch compressor
Author :
Walters, D.R. ; Morrison, L.H.
Author_Institution :
Adv. Photon Source, Argonne Nat. Lab., IL, USA
Abstract :
The Advanced Photon Source (APS) bunch compressor was built with the goal of producing electron bunches with high peak current. Vacuum chamber liners were designed to, reduce the interaction of the electron beam with the surrounding chamber walls. The goal was to have the field of the beam encountering chamber walls that are smooth having diametrical changes that are well controlled. This paper shows the design and construction of our special bellows chambers that are used in the chicane and straight sections of the beamline. The bunch compressor in the APS linac has movable magnets so that the aspect ratio and the compressor displacements are variable. To accommodate this, two types of special chambers are needed: a flexible chamber for different bending angles and a telescopic chamber for length changes in the beamline
Keywords :
accelerator magnets; beam handling equipment; electron accelerators; electron beams; linear accelerators; particle beam bunching; particle beam dynamics; vacuum apparatus; APS bunch compressor; APS linear accelerator; Advanced Photon Source; beam encountering chamber walls; beamline; bellows chambers; bending magnet chambers; chicane; compressor displacements; diametrical changes; dipole magnets; electron bunches; flexible vacuum chambers; high peak current; movable magnets; straight sections; telescopic vacuum chambers; vacuum chamber liners; Assembly; Bellows; Copper; Electron beams; Image coding; Linear particle accelerator; Magnets; Storage rings; Structural beams; Temperature;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987306
