Design of beam line components for the high power wiggler beam line at CHESS

Shen, Qun; Henderson, C.; Keeffe, M.; Marston, M.; Finkelstein, K. D.; Batterman, B. W.

doi:10.1016/0168-9002(94)91958-5

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…At present running conditions of 5.3 GeV and 170 mA, each wiggler outputs about 10 kW of synchrotron radiation in four horizontal milli-radians, with a critical energy of 22.3 keV. Under the CESR upgrade plan the beam current in the storage ring will reach 500 mA in the next 2-4 years and thus will triple the heat loads on various beam line components [6]. The beryllium window sections are located about 12.5 m from each wiggler source.…”

Section: Introductionmentioning

confidence: 97%

<title>Design of a graphite filter/beryllium window for CHESS wiggler beamlines</title>

1997

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We present a graphite-filter/beryllium-window design for the high power wiggler beam lines at CHESS. This design, which has been in operation since 1993 and proves to be very successful, employs a 0.25 mm thick highly-oriented pyrolytic graphite (HOPG) foil as a prefilter to reduce the heat load on the first vacuum beryllium window. Unlike most graphite filter designs in other synchrotron sources that rely entirely on radiative cooling, the HOPG filter in our design is brazed onto a water-cooled copper flange which substantially lowers its maximum temperature and prolongs its operational lifetime. We discuss the safety criteria that we have established based on theoretical calculations and infrared temperature measurements of the graphite filter and the beryllium window.

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Section: Introductionmentioning

confidence: 97%

<title>Design of a graphite filter/beryllium window for CHESS wiggler beamlines</title>

1997

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“…This is especially true in the area of high heat load and high x-ray flux optics [1][2][3][4][5] since the high critical-energy wigglers at CHESS are among the most powerful insertion devices in the synchrotron world [6] partly due to the increased beam currents in the Cornell Electron Storage Ring (CESR). At present conditions, 5.3 GeV and 380 mA, each 24 pole wiggler at A-and F-lines produces about 22 kW of power in 4 mrad opening angle with a critical energy of 22 keV.…”

Section: Introductionmentioning

confidence: 99%

Present and future optics challenges at CHESS and for proposed energy recovery linac source of synchrotron radiation

et al. 2001

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We present recent test results and discuss design challenges on x-ray optical components for the wiggler sources at CHESS and for the proposed energy recovery linac (ERL) source at Cornell. For the existing wiggler sources, a new white-beam collimating mirror has been installed and tested at F-line and some preliminary test results are presented. For the proposed ERL, three types of x-ray optical components are identified and considered: (1) high-heat-load capable optics for high-power and high-power-density insertion-device sources, (2) brilliance preserving optics that can provide high transverse coherence, and (3) optics used to manipulate, preserve and produce short x-ray pulses.

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Design of beam line components for the high power wiggler beam line at CHESS

Cited by 2 publications

References 8 publications

<title>Design of a graphite filter/beryllium window for CHESS wiggler beamlines</title>

<title>Design of a graphite filter/beryllium window for CHESS wiggler beamlines</title>

Present and future optics challenges at CHESS and for proposed energy recovery linac source of synchrotron radiation

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