Research output: Contribution to Journal/Magazine › Journal article
Research output: Contribution to Journal/Magazine › Journal article
}
TY - JOUR
T1 - Recent improvements to a transportable neutron spectrometer (TNS).
AU - Weaver, J. A.
AU - Joyce, M. J.
AU - Peyton, A. J.
AU - Roskell, J.
PY - 2002/1
Y1 - 2002/1
N2 - This paper reviews the design, operation and future development of a transportable neutron spectrometer (TNS). Analogue signal processing techniques are used to condition the signals from an array of radiation sensors, comprising five gas-filled sensors and a hydrogenous oil-filled scintillator. This high reliance on analogue signal processing techniques is because of the nano-second rise time of the pulses produced from the sensor array. The analogue circuitry requires a high degree of expertise from the operator and frequent instrument calibration. An overview of the present instrument will be given together with a description of how the raw data from the individual sensor channels are combined to give a continuous neutron energy spectrum. Digital processing techniques are now being applied to the TNS to handle some of the more complex analogue functions, particularly neutron/γ-ray pulse-shape discrimination for the photo-scintillator column. Potential advantages of this approach are on qualities such as usability, reliability, testability, repeatability and portability of the instrument. The paper will report on the progress to date and give the latest results from experiments using a mixed neutron/γ-ray radiation source.
AB - This paper reviews the design, operation and future development of a transportable neutron spectrometer (TNS). Analogue signal processing techniques are used to condition the signals from an array of radiation sensors, comprising five gas-filled sensors and a hydrogenous oil-filled scintillator. This high reliance on analogue signal processing techniques is because of the nano-second rise time of the pulses produced from the sensor array. The analogue circuitry requires a high degree of expertise from the operator and frequent instrument calibration. An overview of the present instrument will be given together with a description of how the raw data from the individual sensor channels are combined to give a continuous neutron energy spectrum. Digital processing techniques are now being applied to the TNS to handle some of the more complex analogue functions, particularly neutron/γ-ray pulse-shape discrimination for the photo-scintillator column. Potential advantages of this approach are on qualities such as usability, reliability, testability, repeatability and portability of the instrument. The paper will report on the progress to date and give the latest results from experiments using a mixed neutron/γ-ray radiation source.
KW - Digital
KW - Pulse
KW - Discrimination
KW - Neutron
KW - Spectrometer
U2 - 10.1016/S0168-9002(01)01420-6
DO - 10.1016/S0168-9002(01)01420-6
M3 - Journal article
VL - 476
SP - 143
EP - 148
JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-2
ER -