Title :
Improvement of the alignment system for the KEK 2.5-GeV electron linac
Author :
Ogawa, Y. ; Enomoto, A. ; Sato, I.
Author_Institution :
KEK, Nat. Lab. for High Energy Phys., Ibaraki, Japan
Abstract :
The alignment system for the KEK 2.5-GeV electron linac was improved regarding several points: replacement of the large gas laser (He-Ne) with a compact diode-pumped solid laser (Nd:YAG), the introduction of a single-mode, polarization-maintaining fiber between the laser and the light-injection point into the alignment vacuum duct, and the use of new optics for realizing a diffraction-limited beam along the entire linac length of 460 m. The new system works satisfactorily and serves as a light source of good quality. A preliminary measurement of the system resolution for the KEK 2.5-GeV electron linac is reported as well as the main points concerning the improvements. A new design of the linac alignment system for the KEKB injector linac is also proposed
Keywords :
electron accelerators; particle beam dynamics; particle beam injection; 2.5 GeV; 460 m; He-Ne laser replacement; KEK 2.5-GeV electron linac; KEKB injector linac; Nd:YAG laser; alignment system; alignment vacuum duct; compact diode-pumped solid laser; diffraction-limited beam; large gas laser; light source; light-injection point; single-mode polarization-maintaining fiber; Diodes; Ducts; Electron beams; Electron optics; Fiber lasers; Gas lasers; Linear particle accelerator; Optical fiber polarization; Solid lasers; Vacuum systems;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505463
