The advanced photon source X-ray transmitting beam-position-monitor tests at the national synchrotron light source X-25 beamline

Shu, Deming; Collins, J.; Barraza, J.; Kuzay, T.M.

doi:10.1016/0168-9002(94)91951-8

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…The flux measurements in such devices are linear over 12 orders of magnitude, from low-power monochromatic light to highpower focused white beams (Keister & Smedley, 2009;Bohon et al, 2010). As opposed to position measurements by blades (Shu et al, 1994), which only indicate the location of the beam center of mass based on the diffuse tails, a transmission-mode position monitor provides the location of the actual center of mass of the beam. This paper describes the design, construction and calibration of diamond white-beam position monitors (wBPMs) in the context of the National Synchrotron Light Source (NSLS) X25 beamline, as well as characterization of the correlated motion of the electron beam with the photon beam.…”

Section: Introductionmentioning

confidence: 99%

Transmission-mode diamond white-beam position monitor at NSLS

Muller

Smedley

Bohon

et al. 2012

J Synchrotron Radiat

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Two transmission-mode diamond X-ray beam position monitors installed at National Synchrotron Light Source (NSLS) beamline X25 are described. Each diamond beam position monitor is constructed around two horizontally tiled electronic-grade (p.p.b. nitrogen impurity) single-crystal (001) CVD synthetic diamonds. The position, angle and flux of the white X-ray beam can be monitored in real time with a position resolution of 500 nm in the horizontal direction and 100 nm in the vertical direction for a 3 mm × 1 mm beam. The first diamond beam position monitor has been in operation in the white beam for more than one year without any observable degradation in performance. The installation of a second, more compact, diamond beam position monitor followed about six months later, adding the ability to measure the angular trajectory of the photon beam.

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Section: Introductionmentioning

confidence: 99%

Transmission-mode diamond white-beam position monitor at NSLS

Muller

Smedley

Bohon

et al. 2012

J Synchrotron Radiat

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“…In addition, diamond has the highest thermal conductivity of any known bulk material and is radiation hard, making it an attractive option for high heat load, high-flux hard X-ray applications (soft X-rays will lose significant flux in the detector, but use of thin material can compensate for this effect to some level). While diamond is currently used for white-beam diagnostics (Shu et al, 1994;Kudo et al, 2006), it has typically been used for its thermal, crystalline or transmission properties. Here we describe diamond-based photoresistors, which also exploit the electronic properties of the material, including the 5.5 eV band gap, the long charge collection distance and the relative equivalence of electron and hole mobilities.…”

Section: Introductionmentioning

confidence: 99%

Development of diamond-based X-ray detection for high-flux beamline diagnostics

2010

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High-quality single-crystal and polycrystalline chemical-vapor-deposition diamond detectors with platinum contacts have been tested at the white-beam X28C beamline at the National Synchrotron Light Source under high-flux conditions. The voltage dependence of these devices has been measured under both DC and pulsed-bias conditions, establishing the presence or absence of photoconductive gain in each device. Linear response consistent with the theoretically determined ionization energy has been achieved over eleven orders of magnitude when combined with previous low-flux studies. Temporal measurements with single-crystal diamond detectors have resolved the nanosecond-scale pulse structures of both the NSLS and the APS. Prototype single-crystal quadrant detectors have provided the ability to simultaneously resolve the X-ray beam position and obtain a quantitative measurement of the flux.

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“…Two prototype PBPMs with CVD diamond blades have been built by the APS [12,13]. One had an aluminum coating, while another had tungsten coating (for electrical conductivity and photoemission).…”

Section: Photon Beam Position Monitors (Pbpm)mentioning

confidence: 99%

<title>Diamond for high-heat-load synchrotron x-ray applications</title>

Lee

1995

SPIE Proceedings

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Synchrotron facilities worldwide provide scientists with useful radiation in the ultraviolet to the x-ray regime. Third-generation synchrotron sources will deliver photon fluxes in the 10l5 photons/s/O.l%BW range, with brilliance on the order of 1018, photons/s/O.l%BW/mrad2/mm2. Along with the increase in flux and brilliance is an increase in the power and power densities of the x-ray beam. Depending on the particular insertion device, the x-ray beam can have total power in excess of 10 k W and peak power density of more than 400 W/mm2. Such high heat loads are a major challenge in the design and fabrication of x-ray beamline components. The superior thermal and mechanical properties of diamond make it a good candidate as material in these components. Single crystal diamonds can be used as x-ray monochromators, while polycrystalline or CVD diamonds can be used in a variety of ways on the front-end beamline components. This paper will discuss the issues regarding the feasibility of using diamond in third-generation synchrotron beamline components.

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The advanced photon source X-ray transmitting beam-position-monitor tests at the national synchrotron light source X-25 beamline

Cited by 11 publications

References 2 publications

Transmission-mode diamond white-beam position monitor at NSLS

Transmission-mode diamond white-beam position monitor at NSLS

Development of diamond-based X-ray detection for high-flux beamline diagnostics

<title>Diamond for high-heat-load synchrotron x-ray applications</title>

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