Diamond photodiodes for x-ray application

Journal Article · Thu Jan 01 04:00:00 EST 2009

OSTI ID:979392

Distel, James R ^[1]; Smedley, John ^[2]; Keister, Jeffrey W ^[2]; Muller, Erik ^[3]; Jordan - Sweet, Jean ^[4]; Bohon, Jen ^[5]; Dong, Bin ^[6]

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1. Los Alamos National Laboratory
2. BNL
3. STONY BROOK UNIV.
4. WATSON RESEARCH CENTER
5. CASE WESTERN RESERVE UNIV.
6. NON LANL

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: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 979392
• Report Number(s): LA-UR-09-07711; LA-UR-09-7711
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CARBON
CHARGE COLLECTION
DIAMONDS
MONOCRYSTALS
NSLS
PHOTODIODES
PHOTONS