Title :
Performance of the 1994/95 SLC final focus system
Author :
Zimmermann, E. ; Barklow, T. ; Ecklund, S. ; Emma, P. ; McCormick, D. ; Phinney, N. ; Raimondi, P. ; Ross, M. ; Slaton, T. ; Tian, F. ; Turner, J. ; Woodley, M. ; Placidi, M. ; Toge, N. ; Walker, N.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
A major upgrade to the SLC final focus was installed in 1994 to eliminate the dominant third-order aberration of the system, and thereby to reduce the vertical beam size at the IP by a factor of two. At low current, the optimal beam size of about 400 nm is now routinely established, and its sensitivity to orbit variations, to changes of emittance and energy spread, and to other beam parameters has been studied. For intensities above 3×1010 particles per bunch, tuning is more difficult due to increased fluctuations of energy, orbit, and emittances. Nonetheless, the expected beam size of about 600 nm has been observed. New procedures and diagnostics allow easier tuning and optimization of the final focus, and also a first measurement of the emittance increase in the arcs
Keywords :
colliding beam accelerators; electron accelerators; electron beam focusing; linear colliders; particle beam diagnostics; SLC 1994/95 final focus system performance; Stanford Linear Collider; arcs; beam diagnostics; beam tuning; dominant third-order aberration elimination; emittance increase; energy spread; low current; major upgrade; optimal beam size; optimization; orbit variations; vertical beam size reduction; Acceleration; Algebra; Carbon capture and storage; Electrons; Error correction; Extraterrestrial measurements; Linear accelerators; Linear particle accelerator; Particle beams; Telescopes;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.504747
