Measuring neutron fluences and gamma/x-ray fluxes with CCD cameras

Conference · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.1109/NSSMIC.1991.258907· OSTI ID:6104008

Yates, G J ^[1]; Smith, G W ^[2]; Zagarino, P; Thomas, M C ^[3]

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1. Los Alamos National Lab., NM (United States)
2. Ministry of Defense, Aldermaston (United Kingdom). Atomic Weapons Establishment
3. EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations

The capability to measure bursts of neutron fluences and gamma/x-ray fluxes directly with charge coupled device (CCD) cameras while being able to distinguish between the video signals produced by these two types of radiation, even when they occur simultaneously, has been demonstrated. Volume and area measurements of transient radiation-induced pixel charge in English Electric Valve (EEV) Frame Transfer (FT) charge coupled devices (CCDs) from irradiation with pulsed neutrons (14 MeV) and Bremsstrahlung photons (4--12 MeV endpoint) are utilized to calibrate the devices as radiometric imaging sensors capable of distinguishing between the two types of ionizing radiation. Measurements indicate {approx}.05 V/rad responsivity with {ge}1 rad required for saturation from photon irradiation. Neutron-generated localized charge centers or peaks'' binned by area and amplitude as functions of fluence in the 10{sup 5} to 10{sup 7} n/cm{sup 2} range indicate smearing over {approx}1 to 10% of CCD array with charge per pixel ranging between noise and saturation levels.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6104008
• Report Number(s): LA-UR-91-3526; CONF-911106-29; ON: DE92003863
• Resource Relation: Conference: IEEE nuclear science symposium, Santa Fe, NM (United States), 5-9 Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHARGE-COUPLED DEVICES
PERFORMANCE
GAMMA RADIATION
MEASURING METHODS
NEUTRON FLUENCE
X RADIATION
BREMSSTRAHLUNG
IONIZING RADIATIONS
NOISE
SIGNAL CONDITIONING
SIGNALS
TELEVISION CAMERAS
CAMERAS
ELECTROMAGNETIC RADIATION
RADIATIONS
SEMICONDUCTOR DEVICES
426000* - Engineering- Components
Electron Devices & Circuits- (1990-)
440103 - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation