Development of Nanometer-scale Stabilization at the Interaction Point of the ATF2 Final Focus Prototype at KEK ( Japan)

Abstract : The ATF2 final focus prototype features an ultra-low emittance beam focused down to a less than 40 nm vertical beam size at the focal point. The development of dedicated instrumentation enabling the fluctuations of the beam to be measured with a few nm accuracy, as input to a feedback control loop, is reported. A set of special low-noise cavity-BPMs has been prepared with a decay constant short compared to the 300 ns time separation of ILC-like bunch trains which will be used. Installation is planned in a new vacuum vessel, custom made to provide adjustment capabilities in three dimensions for in situ relative alignment and calibration purposes. A fast kicker and feedback algorithm are in preparation for deployment later in the year.
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Poster communications
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http://hal.in2p3.fr/in2p3-00704008
Contributor : Sabine Starita <>
Submitted on : Monday, June 4, 2012 - 4:09:55 PM
Last modification on : Thursday, January 11, 2018 - 6:26:43 AM

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  • HAL Id : in2p3-00704008, version 1

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P. Bambade, F. Bogard, S. Wallon, R. Apsimon, D.R. Bett, et al.. Development of Nanometer-scale Stabilization at the Interaction Point of the ATF2 Final Focus Prototype at KEK ( Japan). International Particle Accelerator Conference - IPAC'12, May 2012, New Orleans, United States. ⟨in2p3-00704008⟩

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