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Persistent URL http://purl.org/net/epubs/work/50324
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Record Id 50324
Title Plans and Progress towards Tuning the ATF2 Final Focus System to Obtain a 35nm IP Waist
Abstract Using a new extraction line currently being commissioned, the ATF2 experiment plans to test a novel compact final focus optics design using a local chromaticity correction scheme, such as could be used in future linear colliders[1]. Using a 1.3 GeV beam of ~30nm normalised vertical emittance extracted from the ATF damping ring, the primary goal is to achieve a vertical IP waist of 35nm. We discuss our planned strategy, implementation details and early experimental results for tuning the ATF2 beam to meet the primary goal. These optics require uniquely tight tolerances on some magnet strengths and positions, we discuss efforts to re-match the optics to meet these requirements using high-precision measurements of key magnet elements. We simulated in detail the tuning procedure using several algorithms and different code implementations for comparison from initial orbit establishment to final IP spot-size tuning. Through a Monte Carlo study of 100s of simulation seeds we find we can achieve a spot-size within 10% of the design optics value in 80% of cases.
Organisation ASTeC , ASTeC-AP , CI , STFC
Keywords Physics , SSTD 2009-2010
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report CI Preprints Cockcroft-09-05. 2009. Cockcroft-09-05.pdf 2009