Self-calibration of semiconductor photodiodes in the soft x-ray region

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143800· OSTI ID:5647109

Krumrey, M; Tegeler, E ^[1]

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1. Physikalisch-Technische Bundesanstalt, Institut Berlin, Abbestr. 2-12, W-1000 Berlin 10 (Germany)

A self-calibration procedure is presented for semiconductor photodiodes to be used as detectors in the soft x-ray region. In this procedure the spectral responsivity is calculated according to a model from experimentally accessible parameters of the detector. The thicknesses of the dead layer and the space charge region as well as the diffusion length have been determined in monochromatic radiation by investigating the angular dependence of the photocurrent. The mean energy for electron-hole pair creation has been determined in calculable undispersed synchrotron radiation of the primary standard source BESSY. The obtained uncertainties of the spectral responsivity in the photon energy region between 150 and 2500 eV are {le}4.2% for newly developed Si {ital n} on {ital p} diodes and {le}6% for GaAsP/Au diodes. The calibrated photodiodes were used to determine the quantum efficiency of photoemissive gold diodes which is up to four orders of magnitude lower than that of semiconductor photodiodes.

• OSTI ID: 5647109
• Journal Information: Review of Scientific Instruments; (United States), Vol. 63:1; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
PHOTODIODES
CALIBRATION
SYNCHROTRON RADIATION SOURCES
X-RAY DETECTION
BESSY STORAGE RING
SOFT X RADIATION
DETECTION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
RADIATION DETECTION
RADIATION SOURCES
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STORAGE RINGS
X RADIATION
430303* - Particle Accelerators- Experimental Facilities & Equipment