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Title: Optical tuning in the arcs and final focus sections of the Stanford Linear Collider

Technical Report ·
DOI:https://doi.org/10.2172/5938857· OSTI ID:5938857

In this thesis, we present the experimental tuning procedures developed for the Arcs and for the Final Focus Section of the Stanford Linear Collider (SLC). Such tuning is necessary to maximize the luminosity, by minimizing the beam size at the interaction point, and to reduce backgrounds in the experiment. In the final Focus Section, the correction strategy must result from the principles of the optical design, which is based on cancellations between second order aberrations, and on the ability to measure micron-size beams typical of the SLC. In the Arcs, the corrections were designed after the initial commissioning, to make the system more error-tolerant, through a modification in the optical design, and to enable adjustments of the beam phase-space a the injection to the Final Focus System, through a harmonic perturbation technique inspired from circular accelerators. Although the overall optimization of the SLC is not entirely finished, an almost optimal set-up has been achieved for the optics of the Arcs and of the Final Focus Section. Beams with transverse sizes close to the nominal ones, of a few microns, have been obtained at the interaction point. We present and discuss our results and the optical limits to the present performance. 24 refs., 25 figs., 2 tabs.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
DOE Contract Number:
AC03-76SF00515
OSTI ID:
5938857
Report Number(s):
SLAC-340; ON: DE89015620
Resource Relation:
Other Information: Thesis (Ph.D.). Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English