CHELSI: a portable neutron spectrometer for the 20-800 MeV region
| Autor: | Thomas D. McLean, R. T. Devine, Leonard L. Romero, Richard H. Olsher, P. Grudberg, A. Fallu-Labruyere, L. H. Miles |
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| Rok vydání: | 2007 |
| Předmět: |
Static Electricity
Radiation Dosage Sensitivity and Specificity Neutron time-of-flight scattering The Svedberg Laboratory Nuclear physics Radiology Nuclear Medicine and imaging Spallation Neutron Radiometry Nuclear Experiment Neutrons Physics Scintillation Miniaturization Radiation Radiological and Ultrasound Technology Spectrometer Spectrum Analysis Public Health Environmental and Occupational Health Reproducibility of Results Dose-Response Relationship Radiation Equipment Design General Medicine Charged particle Equipment Failure Analysis Energy (signal processing) |
| Zdroj: | Radiation Protection Dosimetry. 126:223-228 |
| ISSN: | 1742-3406 0144-8420 |
| Popis: | CHELSI is a CsI-based portable spectrometer being developed at Los Alamos National Laboratory for use in high-energy neutron fields. Based on the inherent pulse shape discrimination properties of CsI(Tl), the instrument flags charged particle events produced via neutron-induced spallation events. Scintillation events are processed in real time using digital signal processing and a conservative estimate of neutron dose rate is made based on the charged particle energy distribution. A more accurate dose estimate can be made by unfolding the 2D charged particle versus pulse height distribution to reveal the incident neutron spectrum from which dose is readily obtained. A prototype probe has been assembled and data collected in quasi-monoenergetic fields at The Svedberg Laboratory (TSL) in Uppsala as well as at the Los Alamos Neutron Science Center (LANSCE). Preliminary efforts at deconvoluting the shape/energy data using empirical response functions derived from time-of-flight measurements are described. |
| Databáze: | OpenAIRE |
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