Efficiency and spatial resolution of the CASCADE thermal neutron detector

Köhli, Markus; Allmendinger, F.; Häußler, W.; Schröder, Thorsten; Klein, Martin; Meven, Martin; Schmidt, Ulrich

doi:10.1016/j.nima.2016.05.014

Cited by 44 publications

(40 citation statements)

References 27 publications

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“…A promising technique is based on solid converter layers ( 10 B, Gd) and either gas proportional counter or solid state material as the sensing medium. Some examples that employ 10 B are: the Multi-Grid [13][14][15][16], the Multi-Blade [17][18][19], the Jalousie detector [20], BandGEM [21,22], the Boron-coated straw-tubes [23] and CASCADE [24]. Other technologies are based on Gd, e.g., the Gd-GEM [25,26], and a whole branch dedicated to the development of solid state neutron detectors coupled with Gadolinium as a converter layer [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

et al. 2019

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The 3 He-based neutron detectors are no longer the default solution for neutron scattering applications. Both the inability of fulfilling the requirements in performance, needed for the new instruments, and the shortage of 3 He, drove a series of research programs aiming to find new technologies for neutron detection. The characteristics of the new detector technologies have been extensively tested to prove their effectiveness with respect to the state-of-the-art technology.Among these, the background rejection capability is crucial to determine. The signal-to-background ratio is strongly related to the performance figure-of-merit for most instruments. These are designed to exploit the high flux expected from the new high intensity neutron sources. Therefore, an inadequate background rejection could significantly affect the measurements, leading to detector saturation and misleading events. This is of particular importance for the kind of techniques in which the signals are rather weak.For the first time, the sensitivity of 3 He detectors to fast neutrons, up to E n = 10 MeV, has been estimated. Two independent measurements are presented: a direct calculation based on a subtraction method used to disentangle the thermal and the fast neutron contribution, while a further evidence is calculated indirectly through a comparison with the recently published data from a 10 B-based detector. Both investigations give a characterization on the order of magnitude for the sensitivity. A set of simulations is presented as well in order to support and to validate the results of the measurements. A sensitivity of 4 · 10 −3 is observed from the data. This is two orders of magnitude higher than that previously observed in 10 B-based detectors.

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Section: Introductionmentioning

confidence: 99%

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

et al. 2019

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“…Fig. 2 (left) shows exemplarily the conversion ion track energy distribution for a layer thickness according to the detector presented here, for which the spectra were calculated by the neutron detector Monte-Carlo transport simulation URANOS [22]. The primary charge carrier generation in the gas then follows the Bethe-Bloch equation.…”

Section: E-fieldmentioning

confidence: 99%

Novel neutron detectors based on the time projection method

Köhli

Desch

Gruber

et al. 2018

Physica B: Condensed Matter

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We present the first prototype of a novel thermal neutron detector using the time projection method. The system consists of 8 TimePix ASICS with postprocessed InGrid meshes. Each ASIC has 256 × 256 pixels of 55 µm×55 µm in size with the capability to measure charge or time. This allows to visualize entire conversion particle tracks with their spatial and time information and, by using event reconstruction algorithms, discriminate against the background of others. By using the Scalable Readout System the detector as presented here could also be upscaled to much larger active areas. In the current configuration we could achieve a spatial resolution of σ = (115 ± 8) µm.

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“…where σ 0 =3837 b, λ 0 =1.82 Å and E 0 = 0.025 eV. The 4 He and 7 Li nuclei are detected in positional sensitive gaseous chamber. The chamber front cathode is founded on the glass disk of 2 mm thickness.…”

Section: Operating Principle Of Detectormentioning

confidence: 99%

“…Recently, a prototype of such detector based on three 1.3 μm layer of 10 B [6] has been created. A detector with six layers of 1.4 μm 10 B is proposed [7]. Its efficiency is estimated as 21% at λ = 1.82 Å.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional solid state gaseous detector based on¹⁰B layer for thermal and cold neutrons

Potashev

Burmistrov

Drachev

et al. 2017

J. Phys.: Conf. Ser.

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Two-dimensional solid state gaseous detector for thermal and cold neutrons is created. The detector has active area of 128 x 128 mm 2 , 10 B neutron converter, and gas chamber with thin windows. The resistive charge-division readout is applied to determine the neutron position. The detector was tested using W-Be photoneutron source at the Institute for Nuclear Research, Moscow. The detector efficiency is estimated as ~4% at neutron wavelength λ = 1.82 Å and 8% at λ = 8 Å. The efficiency of the background detection was less than 10 -5 of that for thermal neutrons. The resulting pulse height resolution and the spatial resolution are estimated as ~15% and ~2.5 mm, respectively.

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Efficiency and spatial resolution of the CASCADE thermal neutron detector

Cited by 44 publications

References 27 publications

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

Novel neutron detectors based on the time projection method

Two-dimensional solid state gaseous detector based on¹⁰B layer for thermal and cold neutrons

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Efficiency and spatial resolution of the CASCADE thermal neutron detector

Cited by 44 publications

References 27 publications

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

Fast neutron sensitivity for 3He detectors and comparison with Boron-10 based neutron detectors

Novel neutron detectors based on the time projection method

Two-dimensional solid state gaseous detector based on10B layer for thermal and cold neutrons

Contact Info

Product

Resources

About

Two-dimensional solid state gaseous detector based on¹⁰B layer for thermal and cold neutrons