Expanded Studies of Linear Collider Final Focus System at the Final Focus Test Beam [Thesis]

Technical Report · Fri Dec 01 00:00:00 EST 1995

DOI:https://doi.org/10.2172/1454146· OSTI ID:1454146

Tenenbaum, Peter Gregory ^[1]

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1. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of California, Santa Cruz, CA (United States)

In order to meet their luminosity goals, linear colliders operating in the center-of-mass energy range from 350 to 1,500 GeV will need to deliver beams which are as small as a few nanometers tall, with x:y aspect ratios as large as 100. The Final Focus Test Beam (FFTB) is a prototype for the final focus demanded by these colliders: its purpose is to provide demagnifications equivalent to those in the future linear collider, which corresponds to a focused spot size in the FFTB of 1.7 microns (horizontal) by 60 nanometers (vertical). In order to achieve the desired spot sizes, the FFTB beam optics must be tuned to eliminate aberrations and other errors, and to ensure that the optics conform to the desired final conditions and the measured initial conditions of the beam. Using a combination of incoming-beam diagnostics, beam-based local diagnostics, and global tuning algorithms, the FFTB beam size has been reduced to a stable final size of 1.7 microns by 70 nanometers. In addition, the chromatic properties of the FFTB have been studied using two techniques and found to be acceptable. Descriptions of the hardware and techniques used in these studies are presented, along with results and suggestions for future research.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1454146
• Report Number(s): SLAC-R-95-475
• Country of Publication: United States
• Language: English

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