Study of Low beta-y Straight Section in SPEAR 3
Accelerator Physics
2008-11-26 v1
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 beta function at the center of the straight from 9.8 m to 1.5 m, the beam size can be decreased from 44 to 17 microns to reduce the ID gap, but the ID length may be limited by the increased beta-y variation in the ID. Alternatively, a ``double waist'' optics with two symmetric low beta-y locations and a chicane may be considered to implement two IDs. In this paper, we discuss the low beta-y optics, effects on the beam dynamic aperture, and the ID parameters needed to maximize photon flux density and brightness while maintaining electron beam lifetime.
Cite
@article{arxiv.physics/0106058,
title = {Study of Low beta-y Straight Section in SPEAR 3},
author = {Y. Nosochkov and J. Corbett and T. Rabedeau},
journal= {arXiv preprint arXiv:physics/0106058},
year = {2008}
}
Comments
PAC2001, 4 pages