کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1822660 | 1526378 | 2014 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vertical beam size measurement in the CESR-TA e+eâ storage ring using x-rays from synchrotron radiation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
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![عکس صفحه اول مقاله: Vertical beam size measurement in the CESR-TA e+eâ storage ring using x-rays from synchrotron radiation Vertical beam size measurement in the CESR-TA e+eâ storage ring using x-rays from synchrotron radiation](/preview/png/1822660.png)
چکیده انگلیسی
We describe the construction and operation of an X-ray beam size monitor (xBSM), a device measuring e+ and eâ beam sizes in the CESR-TA storage ring using synchrotron radiation. The device can measure vertical beam sizes of 10-100μm on a turn-by-turn, bunch-by-bunch basis at e± beam energies of ~2GeV. At such beam energies the xBSM images X-rays of ϵâ1-10keV (λâ0.1-1nm) that emerge from a hard-bend magnet through a single- or multiple-slit (coded aperture) optical element onto an array of 32 InGaAs photodiodes with 50μm pitch. Beamlines and detectors are entirely in-vacuum, enabling single-shot beam size measurement down to below 0.1 mA (2.5Ã109 particles) per bunch and inter-bunch spacing of as little as 4 ns. At Eb=2.1GeV, systematic precision of ~1μm is achieved for a beam size of ~12μm; this is expected to scale as â1/Ïb and â1/Eb. Achieving this precision requires comprehensive alignment and calibration of the detector, optical elements, and X-ray beam. Data from the xBSM have been used to extract characteristics of beam oscillations on long and short timescales, and to make detailed studies of low-emittance tuning, intra-beam scattering, electron cloud effects, and multi-bunch instabilities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 748, 1 June 2014, Pages 96-125
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 748, 1 June 2014, Pages 96-125
نویسندگان
J.P. Alexander, A. Chatterjee, C. Conolly, E. Edwards, M.P. Ehrlichman, E. Fontes, B.K. Heltsley, W. Hopkins, A. Lyndaker, D.P. Peterson, N.T. Rider, D.L. Rubin, J. Savino, R. Seeley, J. Shanks, J.W. Flanagan,