Title :
Study of low βy straight section in SPEAR 3
Author :
Nosochkov, Y. ; Corbett, J. ; Rabedeau, T.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The SPEAR 3 light source has two 7.6 m straight sections one of which is available for new insertion devices (ID). By reducing the vertical βy function at the center of the straight from 9.8 m to 1.5 m, the beam size can be decreased from 44 μm to 17 μm to reduce the ID gap, but the ID length may be limited by the increased βy variation in the ID. Alternatively, a "double waist" optics with two symmetric low βy locations and a chicane may be considered to implement two IDs. In this paper, we discuss the low βy optics effects on the beam dynamic aperture, and the ID parameters needed to maximize photon flux density and brightness while maintaining electron beam lifetime
Keywords :
electron accelerators; electron optics; particle beam diagnostics; particle beam dynamics; storage rings; SPEAR 3; beam dynamic aperture; beam size; brightness; chicane; double waist optics; electron beam lifetime; insertion devices; low βy optics; photon flux density; vertical βy function; Apertures; Brightness; Electron beams; Electron optics; Error correction; Intrusion detection; Lattices; Light sources; Optical design; Radio frequency;
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.2001.987864
