Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 22, Issue -, Pages 1396-1402Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600577515014824
Keywords
X-ray detector; beam position monitor; flux; morphology; diamond
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Funding
- National Science Foundation Division of Biological Infrastructure Instrument Development for Biological Research Program [DBI-1255340, DBI-1254804, DBI-1254587]
- NSF [DBI-1228549]
- National Institute of Biomedical Imaging and Bioengineering [P30-EB-009998]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- NIH/NIGMS via NSF [DMR-1332208]
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1254587] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1254804, 1255340, 1228549] Funding Source: National Science Foundation
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Fabrication and testing of a prototype transmission-mode pixelated diamond X-ray detector (pitch size 60-100 mu m), designed to simultaneously measure the flux, position and morphology of an X-ray beam in real time, are described. The pixel density is achieved by lithographically patterning vertical stripes on the front and horizontal stripes on the back of an electronic-grade chemical vapor deposition single-crystal diamond. The bias is rotated through the back horizontal stripes and the current is read out on the front vertical stripes at a rate of similar to 1 kHz, which leads to an image sampling rate of similar to 30 Hz. This novel signal readout scheme was tested at beamline X28C at the National Synchrotron Light Source (white beam, 5-15 keV) and at beamline G3 at the Cornell High Energy Synchrotron Source (monochromatic beam, 11.3 keV) with incident beam flux ranges from 1.8 x 10(-2) to 90 W mm(-2). Test results show that the novel detector provides precise beam position (positional noise within 1%) and morphology information (error within 2%), with an additional software-controlled single channel mode providing accurate flux measurement (fluctuation within 1%).
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