Clinical 6 MV X-Ray facility photo-neutron/fission interrogations with TMFD sensors
نویسندگان
چکیده
Detection of several targets (U, Be , D 2 O) interest to national security has been achieved at Purdue University’s 6 MV X-ray clinical linear accelerator (CLINAC), from photoneutron/fission induced neutron signatures using a Centrifugally Tensioned Metastable Fluid Detector (CTMFD). Traditional detection schemes were saturated and ineffective under the intense (to ∼ 10 4 R/h) photon environment; however, CTMFD sensor technology was capable measuring relatively low ( 12 x lower intensity) field produced MeV-end point beam interactions with CLINAC components surroundings. This is in stark contrast published results based on conventional belief that dose component facilities immeasurable over background dose. Photoneutron photofission production rates detected analyzed various standoffs isocenter, without special nuclear material (SNM) related ranging mass 5 g Be, 0.6 kg UO . It confirmed photons do result measurable above normal cosmic background. Additionally, threshold mode, operating tensioned metastable pressure -5 bar, enabled conclusive rejection photoneutrons, while enabling rapid of: O, C U within seconds minutes around R/h fields. • detectors become environments. previously believed beams produce an The able detect photo-neutrons generated LINAC. In reject photo-neutron U, O.
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research
سال: 2022
ISSN: ['1872-9576', '0168-9002']
DOI: https://doi.org/10.1016/j.nima.2022.166395