Design of a Nanometer Beam Size Monitor for ATF2

Details Design of a Nanometer Beam Size Monitor for ATF2 Design of a Nanometer Beam Size Monitor for ATF2

2008-10-30

arxiv.org/abs/0810.5467v1

Physics

Instrumentation and Detectors

58 pages, 35 figures, UT-ICEPP 08-04, Some figures are degraded due to the file size limitation of arXiv, visit http://www.i

Scientific paper

We developed an electron beam size monitor for extremely small beam sizes. It uses a laser interference fringe for a scattering target with the electron beam. Our target performance is < 2 nm systematic error for 37 nm beam size and < 10% statistical error in a measurement using 90 electron bunches for 25 - 6000 nm beam size. A precise laser interference fringe control system using an active feedback function is incorporated to the monitor to achieve the target performance. We describe an overall design, implementations, and performance estimations of the monitor.

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