X-ray beam monitor made by thin-film CVD single-crystal diamond

Abstract

Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained. Republication of this article or its storage in electronic databases other than as specified above is not permitted without prior permission in writing from the IUCr.For further information see http://journals.iucr.org/services/authorrights.html Synchrotron radiation research is rapidly expanding with many new sources of radiation being created globally. Synchrotron radiation plays a leading role in pure science and in emerging technologies. The Journal of Synchrotron Radiation provides comprehensive coverage of the entire field of synchrotron radiation research including instrumentation, theory, computing and scientific applications in areas such as biology, nanoscience and materials science. Rapid publication ensures an up-to-date information resource for scientists and engineers in the field.Crystallography Journals Online is available from journals.iucr.org J. Synchrotron Rad. (2012 A novel beam position monitor, operated at zero bias voltage, based on highquality chemical-vapor-deposition single-crystal Schottky diamond for use under intense synchrotron X-ray beams was fabricated and tested. The total thickness of the diamond thin-film beam monitor is about 60 mm. The diamond beam monitor was inserted in the B16 beamline of the Diamond Light Source synchrotron in Harwell (UK). The device was characterized under monochromatic high-flux X-ray beams from 6 to 20 keV and a micro-focused 10 keV beam with a spot size of approximately 2 mm  3 mm square. Time response, linearity and position sensitivity were investigated. Device response uniformity was measured by a raster scan of the diamond surface with the micro-focused beam. Transmissivity and spectral responsivity versus beam energy were also measured, showing excellent performance of the new thin-film single-crystal diamond beam monitor.

Experimental determination of the PTW 60019 microDiamond dosimeter active area and volume

“…2D maps of the MD surface active area were recorded by soft x-ray microbeam irradiation of the device. 19,20 To this purpose, a Rigaku D-Max diffractometer was used as an xray source (Rigaku Technologies, Tokyo, Japan), equipped with a Co x-ray tube and a 200 µm pinhole aperture in order to collimate the beam on the MD surface. The x-ray diffractometer irradiation parameters were 35 kV and 30 mA.…”

Current advances in synchrotron radiation instrumentation for MX experiments

“…For monochromatic X-ray beams, a variety of position monitors are used: CVD diamond quadrant electrode photo current monitors with a polycrystalline (Shu et al , 1998, Sehr et al , 2004), (Dectris Rigi) or a single crystalline membrane (Desjardins et al , 2014, Marinelli et al , 2012, Muller et al , 2012), quadrant diode monitors detecting backscatter fluorescence from a metal foil (Alkire et al , 2000) and split electrode ion chambers (Menk et al , 2006, Sato et al , 2004, Schildkamp & Pradervand, 1995). All of these can double as intensity monitors.…”

A diamond gammavoltaic cell utilizing surface conductivity and its response to different photon interaction mechanisms

“…Gamma dosimeters have been calibrated by some of the authors in a previous study up to 3,600 Gy/h, showing no degradation [26]. Extensive research on diamond detectors has been undertaken at University of Rome Tor Vergata [27][28][29][30][31][32]. Researchers there have tested their dosimeters under a wide range of radiation types both with, and without, an applied bias.…”