Characterization of a mid-sized Li foil multi-wire proportional counter neutron detector

Nelson, Kyle A.; Kusner, M.R.; Montag, Benjamin W.; Mayhugh, M. R.; Schmidt, Aaron J.; Wayant, Clayton D.; Shultis, J. Kenneth; Ugorowski, Philip B.; McGregor, Douglas S.

doi:10.1016/j.nima.2014.05.078

Cited by 10 publications

(10 citation statements)

References 6 publications

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“…The intrinsic thermal neutron detection efficiency, neutrons detected per incident neutron, was approximately 55% for each detector. The expected intrinsic thermal neutron detection of each 5-layer Li foil MWPC was 55% as has also been reported elsewhere (Nelson et al, 2012(Nelson et al, , 2014.…”

Section: Methodssupporting

confidence: 80%

“…Six anode wire banks enclosed the five foil layers and collected the ionization generated in the P-10 gas volume by the triton and alpha particle reaction products. Assembly of Li foil MWPC neutron detectors of this type are outlined in more detail elsewhere (Nelson et al, 2011(Nelson et al, , 2012(Nelson et al, , 2014.…”

Section: Methodsmentioning

confidence: 99%

“…Lab) has developed neutron detectors based on a large-area, highefficiency, low-cost, 6 Li foil multi-wire proportional counter (MWPC) (Bellinger et al, 2013a(Bellinger et al, , 2013bNelson et al, 2011Nelson et al, , 2012Nelson et al, , 2014. The 6 Li foil MWPC suspends 6 Li metal foils (95% enrichment) between banks of anode wires.…”

Section: Introductionmentioning

confidence: 99%

“…Suspending the foils dramatically increases the neutron detection efficiency compared to coating the walls because reaction products from the 6 Li(n,α) 3 H reaction are able to escape both sides of the foil and enter a proportional gas volume. Several Li foil MWPCs have been constructed to date, including a backpack neutron detector that was accepted as a viable 3 He replacement at a government sponsored test campaign (Nelson et al, 2014). Intrinsic advantages of suspending the Li foils over alternative coated designs results in a higher neutron detection efficiency per Li foil and is explained in greater detail by Nelson et alli (Nelson et al, 2011(Nelson et al, , 2012(Nelson et al, , 2014.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A modular large-area lithium foil multi-wire proportional counter neutron detector

Nelson

Edwards

Kusner

et al. 2015

Radiation Physics and Chemistry

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Section: Methodssupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A modular large-area lithium foil multi-wire proportional counter neutron detector

Nelson

Edwards

Kusner

et al. 2015

Radiation Physics and Chemistry

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“…Thus, reaction products are able to escape both sides of the suspended Li foil simultaneously and ionize the adjacent gas volumes concurrently. This results in a detector that can achieve neutron detection efficiencies comparable to 3 He gas-filled detectors [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Results and potential applications of handheld, midsized, and large-area low-cost Li foil MWPCS

Nelson

Hinson

Kusner

et al. 2014

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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Three different sizes of Li foil multi-wire proportional counter (MWPC) neutron detectors were constructed with effective areas ranging between 30-1250 cm 2 . These Li foil MWPC neutron detectors contain five 75 µm thick suspended Li foils. Each foil is less than the summed range (156 µm) of the triton and alpha particle reaction products from the 6 3 H reaction. Suspending Li foils offers several advantages over conventional coated gas-filled devices, such as increased detection efficiency and gamma-ray rejection capabilities. Improvements are a direct result of the reaction products simultaneously escaping both sides of suspended Li foils. The three categories of detectors constructed (large-area, mid-sized, handheld) were tested against 3 He neutron detectors. Two large-area detectors (1250 cm 2 effective area) were position back-to-back in HDPE housing. Various tests were completed with this large-area unit including: 1/R 2 , transient, field-of-view, and angular response. A mid-sized detector (550 cm 2 ) was delivered to a backpack test campaign where the device outperformed two commercially available 3 He tube backpack detectors. Both the large-area and mid-sized Li foil MWPCs had measured intrinsic thermal neutron detection efficiencies of 54% and a gamma-ray rejection ratio (GRR) of 3.0 x 10 -9 or better. Lastly, several handheld sized devices were constructed and compared to a 4 atm 3 th = 81.5%). A smaller version of the five layer devices was constructed (effective area: 30 cm 2 ). This five layer device and another device, referred to as thecomparable count rates to the 3 He detector.

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Operational properties of fine powder aerosol as radiation detection medium in gaseous proportional counters

Duarte

Monteiro

Azevedo

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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Characterization of a mid-sized Li foil multi-wire proportional counter neutron detector

Cited by 10 publications

References 6 publications

A modular large-area lithium foil multi-wire proportional counter neutron detector

A modular large-area lithium foil multi-wire proportional counter neutron detector

Results and potential applications of handheld, midsized, and large-area low-cost Li foil MWPCS

Operational properties of fine powder aerosol as radiation detection medium in gaseous proportional counters

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