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  • 1
    Electronic Resource
    Electronic Resource
    A finite element analysis of room-temperature silicon crystals for the advanced photon source bending-magnet and insertion-device beams (abstract)a) : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 2064-2064 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this paper, the results of a series of thermal and distortion finite element analyses performed on room-temperature silicon for the three standard APS sources, namely, the bending magnet, wiggler A, and undulator A, are reported. The modeling was performed with the silicon cooled directly with water or liquid gallium through rectangular channels. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145728
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  • 2
    Electronic Resource
    Electronic Resource
    A finite element analysis of room-temperature silicon crystals for the advanced photon source bending-magnet and insertion-device beamsa) (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 2713-2718 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: In this paper, the results of a series of thermal and distortion finite element analyses performed on room-temperature silicon for the three standard APS sources, namely, the bending magnet, wiggler A, and undulator A, are reported. The modeling was performed with the silicon cooled directly with water or liquid gallium through rectangular channels. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145615
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  • 3
    Electronic Resource
    Electronic Resource
    Time-resolved hard x-ray studies using third-generation synchrotron radiation sources (abstract) : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1146-1146 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The third-generation, high-brilliance, synchrotron radiation sources currently under construction will usher in a new era of x-ray research in the physical, chemical, and biological sciences. One of the most exciting areas of experimentation will be the extension of static x-ray scattering and diffraction techniques to the study of transient or time-evolving systems. The high repetition rate, short-pulse duration, high-brilliance, variable spectral bandwidth, and large particle beam energies of these sources make them ideal for hard x-ray, time-resolved studies. The primary focus of this presentation will be on the novel instrumentation required for time-resolved studies such as optics which can increase the flux on the sample or disperse the x-ray beam, detectors and electronics for parallel data collection, and methods for altering the natural time structure of the radiation. This work is supported by the U.S. Department of Energy, BES-Materials Science, under Contract No. W-31-109-ENG-38.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143116
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  • 4
    Electronic Resource
    Electronic Resource
    Summary of the satellite workshop on thermal problems of synchrotron radiation optics : Proceedings of the 4th International Conference on Synchrotron Radiation Instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1623-1624 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Highlights of a workshop on thermal problems of synchrotron radiation optics, a satellite meeting of the 4th International Conference on Synchrotron Radiation Instrumentation, will be presented. The most recent theoretical concepts and experimental results in studies of the thermal distortion of components exposed to the high heat loads of synchrotron radiation were discussed. Presentations were made on a variety of cooling techniques such as adaptive optical components, cryogenic cooling, nonstandard geometries (e.g., thin crystals and inclined crystals), and specialized materials (e.g., beryllium single crystals and multilayers), all of which attempt to mitigate the thermal effects on the performance of the x-ray optical components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142997
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  • 5
    Electronic Resource
    Electronic Resource
    The Advanced Photon Source Metrology Laboratory : The 9th National conference on synchrotron radiation instrumentation (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3369-3369 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Advanced Photon Source (APS) Metrology Laboratory is now operational in its permanent location in a cleanroom environment on the Experiment Hall floor of the APS site. The Metrology Laboratory will provide characterization of the figure and finish of x-ray optical surfaces for the user community using visible light instrumentation. Three noncontact instruments are now available for measuring surface features with lateral resolution from less than a micron to lengths of 2 meters and with a vertical resolution as small as an Angstrom. This paper gives a brief description of the three instruments used to cover this spatial frequency range and other associated issues, such as the environment and cleanliness of the laboratory. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147326
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  • 6
    Electronic Resource
    Electronic Resource
    Workshop summary on thermal management of x-ray optical components for synchrotron radiation : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 2380-2382 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Workshop on Thermal Management of X-ray Optical Components for Synchrotron Radiation, held July 14 and 15, 1994, at Argonne National Laboratory, is summarized. This workshop, a satellite meeting of the Fifth International Conference on Synchrotron Radiation Instrumentation, is the latest in a series of workshops that have been held to explore solutions to mitigate thermally induced distortion in optical components exposed to high-heat-flux x-ray beams generated by insertion devices. Presentations were made on a variety of approaches to address this problem including techniques to expand the footprint of the beam on the optic, ways to reduce the deposited power, use of cryogenically cooled optics, diamond optics, and various combinations of the aforementioned methods. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145627
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  • 7
    Electronic Resource
    Electronic Resource
    Cryogenically cooled monochromators for the Advanced Photon Source : The 9th National conference on synchrotron radiation instrumentation (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3348-3349 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The use of cryogenically cooled monochromators looks to be a very promising possibility for the Advanced Photon Source. This position has recently been bolstered by several experiments performed on beamlines at the ESRF and CHESS. At the ESRF, several crystal geometries have been tested that were designed for high power densities ((approximately-greater-than)150 W/mm2) and moderate total absorbed powers (〈200 W). These geometries have proven to be very successful at handling these power parameters with measured strains on the arc-second level. The experiments performed at CHESS were focused on high total power ((approximately-greater-than)1000 W) but moderate power densities. As with the previously mentioned experiments, the crystals designed for this application performed superbly with no measurable broadening of the rocking curves on the arc-second level. These experiments will be summarized and, based on these results, the performance of cryogenic monochromators for the APS will be assessed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147509
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  • 8
    Electronic Resource
    Electronic Resource
    Counting statistics and loss corrections for the APS : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1225-1228 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: It has been suggested that for timing experiments, it might be advantageous to arrange the bunches in the storage ring in an asymmetrical mode. In this paper, we determine the counting losses from pulsed x-ray sources from basic probabilistic arguments and from Poisson statistics. In particular the impact on single-photon counting losses of a variety of possible filling modes for the Advanced Photon Source (APS) is examined. For bunches of equal current, a loss of 10% occurs whenever the count rate exceeds 21% of the bunch repetition rate. This changes slightly when bunches containing unequal numbers of particles are considered. The results are applied to several common detector/electronics systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143088
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  • 9
    Electronic Resource
    Electronic Resource
    A synchronized rotating crystal x-ray beam chopper (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 2852-2855 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new x-ray beam chopper has been designed and tested at the Advanced Photon Source. This beam chopper uses the diffractive properties of a rotating crystal to produce transmission window times as short as about 10 ns from a single diffracting face for 10 keV radiation. Precision control of the crystal rotation allows phase locking with the orbital frequency of the synchrotron storage ring; hence, the transmission of short x-ray pulses, corresponding to the 50 ps full width at half maximum charge bunch length, is possible with any fill pattern presently used at the Advanced Photon Source storage ring. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1485780
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  • 10
    Electronic Resource
    Electronic Resource
    A synchronized rotating crystal beam chopper (abstract) : Papers from the 12th National Synchrotron Radiation Instrumentation Conference (2002)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 73 (2002), S. 1545-1545 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A rotating crystal beam chopper that can be synchronized to the synchrotron storage ring frequency has been successfully fabricated and tested. The crystal chopper uses the storage ring frequency master clock as input and operates at 1/500 times its input frequency. It is phase locked to the input frequency. At the Advanced Photon Source, using the ring frequency clock (∼271 kHz), the crystal beam chopper rotates at about 542 Hz, with less than 3 ns jitter in the period. With its Si(111) reflecting surfaces, this corresponds to a transmission window of about 10 ns for 10 keV x rays, assuming the upstream monochromator is also Si(111). By dividing its input frequency, it is possible to operate the crystal chopper at 271 and 135.5 Hz for wider transmission windows. To date, this is the only device that has demonstrated a ns range transmission window and operates phase locked to the synchrotron storage ring frequency. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1448164
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