Measuring neutronfluences and gamma/x-ray fluxes with CCD cameras

Conference · Thu Oct 01 00:00:00 EDT 1992 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6713622

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). Physics Div.
2. Atomic Weapons Establishment (AWE), Aldermaston, Reading, Berkshire RG7 PR (United Kingdom)
3. EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations

This paper reports on the capability to measure bursts of neutron fluences and gamma/z-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. 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] 0.5 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.

• OSTI ID: 6713622
• Report Number(s): CONF-911106-; CODEN: IETNAE
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 39:5; Conference: 1991 Institute of Electrical and Electronic Engineers (IEEE) nuclear science symposium and medical imaging conference, Santa Fe, NM (United States), 2-9 Nov 1991; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
07 ISOTOPES AND RADIATION SOURCES
CHARGE-COUPLED DEVICES
PERFORMANCE TESTING
GAMMA CAMERAS
BREMSSTRAHLUNG
GAMMA DETECTION
IONIZING RADIATIONS
IRRADIATION
MEASURING INSTRUMENTS
MEV RANGE 10-100
NEUTRON FLUENCE
NEUTRON FLUX
PHOTONS
PULSED NEUTRON TECHNIQUES
RADIOMETRIC ANALYSIS
BOSONS
CAMERAS
CHEMICAL ANALYSIS
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
MASSLESS PARTICLES
MEV RANGE
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTION
RADIATION FLUX
RADIATIONS
SEMICONDUCTOR DEVICES
TESTING
440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation
440200 - Radiation Effects on Instrument Components
Instruments
or Electronic Systems
070204 - Radiation Sources- Industrial Uses
Radiometric