Diamond Photodiodes for X-ray Applications
Single crystal high purity CVD diamonds have been metallized and calibrated as photodiodes at the National Synchrotron Light Source (NSLS). Current mode responsivity measurements have been made over a wide range (0.2-28 keV) of photon energies across several beamlines. Linear response has been achieved over ten orders of magnitude of incident flux, along with uniform spatial response. A simple model of responsivity has been used to describe the results, yielding a value of 13.3 {+-} 0.5 eV for the mean pair creation energy. The responsivity vs. photon energy data show a dip for photon energies near the carbon edge (284 eV), indicating incomplete charge collection for carriers created less than one micron from the metallized layer.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1040415
- Report Number(s):
- BNL-91363-2010-JA; MRSPDH; KA-04; TRN: US1202431
- Journal Information:
- Materials Research Society Symposia Proceedings, Vol. 1203; ISSN 0272-9172
- Country of Publication:
- United States
- Language:
- English
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Responsivity of Diamond X-ray Photodiodes Calibrated at NSLS
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