Responsivity of Diamond X-ray Photodiodes Calibrated at NSLS
Single crystal, high purity synthetic diamond is used as photoabsorption and carrier transport medium in x-ray photodiodes. While the thermal / mechanical robustness and high x-ray transmission of diamond make such devices attractive for synchrotron instrumentation, state-of-the-art quality material and electrical interfaces further make such detectors feasible. The present work develops methodology for attaining calculable responsivity (photocurrent yield) over a wide range of photon energies (0.2 to 28 keV) to within 5% accuracy. These methods achieve linear response for up to 0.2 W absorbed x-ray power and response time as low as 1 ns. Details of contact formation / robustness and bias configuration are explored.
- Research Organization:
- Brookhaven National Laboratory (BNL) NSLS II Project Office
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 970615
- Report Number(s):
- BNL-90507-2009-CP; R&D Project: 12288; KC020401G; TRN: US1000822
- Resource Relation:
- Conference: The 10th International Conference on Synchrotron Radiation Instrumentation (SRI09); Melbourne, Victoria, Australia; 20090927 through 20091002
- Country of Publication:
- United States
- Language:
- English
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