Wearable detector device utilizing microstructured semiconductor neutron detector technology

Ochs, Taylor R.; Beatty, B. L.; Bellinger, Steven L.; Fronk, Ryan G.; Gardner, John A.; Henson, Luke C.; Huddleston, David E.; Hutchins, R. M.; Sobering, Timothy J.; Thompson, Joshua; Bergeijk, A. Van; McGregor, Douglas S.

doi:10.1016/j.radphyschem.2018.08.028

Cited by 18 publications

(9 citation statements)

References 17 publications

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“…In actual manufacturing, the front p-type ohmic contact electrode of the SiC diode was usually made of Ti with a thickness of 30 nm and Al with a thickness of 100 nm, and the backside n-type ohmic contact electrode was usually made of Ni with a thickness of 150 nm [41], [42], [43], [44], [45]. Also, the surface area of the SiC neutron detector was 1 × 1 cm 2 [9], [10], [15]. As 3 H particles with an energy of 2.73 MeV have the longest range of about 29 µm in SiC materials [3], [30], [34], [37], the thickness of SiC solid must be thick enough to ensure that charged particles can sufficiently decelerate and transfer all energy to the SiC region [9], [38], [46].…”

Section: B Detector Modeling Methodology In Geant4mentioning

confidence: 99%

“…Thus, the output response of the semiconductor neutron detector indirectly realizes the detection of neutrons. Several groups have made substantial early contributions to the development of Si-based neutron detectors [9], [10], [11], [12], [13], [14], [15]. Typically, the thermal neutron intrinsic detection efficiency for thin-film-coated detectors is lower than 5% [6], [10], [16].…”

Section: Introductionmentioning

confidence: 99%

“…To improve the detection efficiency, researchers have proposed a stacked silicon neutron detector structure [17], [18]. In addition, McGregor's group developed a silicon microstructured semiconductor neutron detector (MSND) that significantly improves the neutron detection efficiency [13], [14], [15], [19], [20].…”

Section: Introductionmentioning

confidence: 99%

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Improving Detection Efficiency of Silicon Carbide Neutron Detector Using Double Trench

et al. 2023

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In this article, we propose a double-trenchtype silicon carbide (SiC) neutron detector and model it using the concept of a unit cell on the GEANT4 platform. When the low-level discriminator (LLD) value was fixed at 300 keV, the structural parameters of this double-trench-type SiC neutron detector were optimized to maximize the intrinsic detection efficiency. Compared with the single trench type, the doubletrench-type SiC neutron detector can significantly improve the neutron intrinsic detection efficiency within a limited trench depth, which was especially suitable for the current technological status that SiC materials can only be used for shallow trench etching. Apart from optimizing the structural parameters, the energy deposition spectra in the SiC detector region by the generated secondary charged particles upon thermal neutron interaction in neutron conversion materials ( 10 B and 6 LiF) have also been estimated. It can be found that the double-trench-type SiC neutron detector counts significantly increased in the low-energy range, while the counts in the high-energy range are only slightly decreased. This is also the essential reason why the intrinsic detection efficiency of the double-trench-type SiC neutron detector was significantly improved compared to the single-trench-type SiC neutron detector.

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Section: B Detector Modeling Methodology In Geant4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improving Detection Efficiency of Silicon Carbide Neutron Detector Using Double Trench

et al. 2023

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“…Shown in Figure 1 is a simulated neutron response of an MSND over the thermal, epithermal, and fast neutron energy ranges. For the low-energy neutron detection system, we used modular neutron detector (MND) boards, developed by Radiation Detection Technologies, Inc. (RDT), each of which holds 24 MSNDs (Ochs et al 2019). The MND layout increases the cross-sectional area available for neutron detection.…”

Section: Neutron Detection Methodsmentioning

confidence: 99%

“…For instrument readout, the electronics interface is based on previous work with the MND technology (Ochs et al 2019). When a neutron is absorbed in the neutron-converting material, the resulting charged-particle reaction products induce excitation within the MSND diode volume, and electron-hole pairs are produced.…”

Section: Fabricationmentioning

confidence: 99%

A semiconductor-based neutron detection system for planetary exploration

Soto

Fronk

Neal

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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We explore the use of microstructured semiconductor neutron detectors (MSNDs) to map the ratio between thermal neutrons and higher energy neutrons. The system consists of alternating layers of modular neutron detectors (MNDs), each comprising arrays of twentyfour MSNDs, and high-density polyethylene moderators (HDPE) with gadolinium shielding to filter between thermal neutrons and higher energy neutrons. We experimentally measured the performance of three different configurations and demonstrated that the sensor system prototypes detect and differentiate thermal and epithermal neutrons. We discuss future planetary exploration applications of this compact, semiconductor-based low-energy neutron detection system.

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Wearable Dosimeters for Medical and Defence Applications: A State of the Art Review

Dhanekar

Rangra

2021

Adv Materials Technologies

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Wearable dosimeters form an essential part of the personnel protection scheme in work spaces such as defence, nuclear establishments, and medical fields with radiation hazard. In the current scenario where use of high energy ionizing radiation sources (nuclear sources) is indispensable, the need of radiation detectors is mandatory for measuring the dose received by the person exposed in his work space and also measure the dose for patients where nuclear radiation is used for treatment. Wearable dosimeters need to have some special requirements apart from being accurate, precise, and robust. These need to be light in weight and should cause no harm to the human body while it is touching the body or apparels. This paper comprises an introduction to dosimeters, key characteristics, important techniques used for detection of neutrons and X‐rays and also mentions about a few potential companies involved in developing wearable dosimeters in these application areas. The techniques have been collated, described, compared and the need to detect neutrons and X‐rays has been expressed keeping in mind the demand from the defence and medical disciplines. This review also contains artificial intelligence and internet of things which form the basis of trending and upcoming wearable dosimeters.

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Wearable detector device utilizing microstructured semiconductor neutron detector technology

Cited by 18 publications

References 17 publications

Improving Detection Efficiency of Silicon Carbide Neutron Detector Using Double Trench

Improving Detection Efficiency of Silicon Carbide Neutron Detector Using Double Trench

A semiconductor-based neutron detection system for planetary exploration

Wearable Dosimeters for Medical and Defence Applications: A State of the Art Review

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