scholarly journals Status of the two-dimensional, multi-wire proportional chamber detector for the China Spallation Neutron Source

2018 ◽  
Vol 48 ◽  
pp. 1860121 ◽  
Author(s):  
Zhiwen Wen ◽  
Huirong Qi
Keyword(s):  
Neutron Source ◽  
Neutron Detector ◽  
Detection Efficiency ◽  
Spallation Neutron Source ◽  
Two Dimensional ◽  
Large Area ◽  
Position Resolution ◽  
Proportional Chamber ◽  
High Detection Efficiency ◽  
Under Construction

The re-designed two-dimensional, multi-wire proportional chamber (MWPC) detector based on the [Formula: see text]He operation gas has been developed for the multifunctional reflection spectrum detection requirements in China Spallation Neutron Source (CSNS), which is under construction in Guangdong province, China. This efficient thermal neutron detector with large area (200 mm [Formula: see text] 200 mm active area), two-dimensional position sensitive (<2 mm of position resolution), high detection efficiency (>65% in the wavelength of 1.8Å) and good n/[Formula: see text] discrimination would meet some requirements in CSNS The neutron detector consists of a MWPC detector and a high-pressure gas vessel. The wire readout structures of the detector and the gas purity device have been optimized based on previous design and testing. The re-designed MWPC detector with an absorber thickness of 10 mm and 8.5 atm operating gas mixture of [Formula: see text]He and C[Formula: see text]H[Formula: see text] was constructed. Using the non-return valve manufactured by Swagelok, the gas purity device was developed to clean the water and remove gas impurities. The effective cycle time can be up to 50 min per sequence. The performance of the position resolution and the two-dimensional imaging accuracy by the traditional center of gravity readout method was studied with an X-ray radiation source and the neutron source. At the end of this year, the detector will be mounted at CSNS and studied using the neutron source.

scholarly journals High Efficiency Gaseous Tracking Detector for Cosmic Muon Radiography

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Dezső Varga ◽  
Gábor Nyitrai ◽  
Gergő Hamar ◽  
László Oláh
Keyword(s):  
High Efficiency ◽  
Detection Efficiency ◽  
Observation System ◽  
Large Area ◽  
Position Resolution ◽  
Proportional Chamber ◽  
Muon Radiography ◽  
Tracking Detector ◽  
Multiwire Proportional Chamber ◽  
Gas Consumption

A tracking detector system has been constructed with an innovative approach to the classical multiwire proportional chamber concept, using contemporary technologies. The detectors, covering an area of 0.58 square meters each, are optimized for the application of muon radiography. The main features are high (>99.5%) and uniform detection efficiency, 9 mm FWHM position resolution, and filling gas consumption below 2 liters per hour for the nontoxic, nonflammable argon and carbon dioxide mixture. These parameters, along with the simplicity of the construction and the tolerance for mechanical effects, make the detectors a viable option for a large area muography observation system.

scholarly journals Development of high-pressure multi-wire proportional chamber neutron detector for the China Spallation Neutron Source multipurpose reflectometer

2018 ◽  
Vol 67 (7) ◽  
pp. 072901
Author(s):  
Wen Zhi-Wen ◽  
Qi Hui-Rong ◽  
Zhang Yu-Lian ◽  
Wang Hai-Yun ◽  
Liu Ling ◽  
...  
Keyword(s):  
High Pressure ◽  
Neutron Source ◽  
Neutron Detector ◽  
Spallation Neutron Source ◽  
Proportional Chamber

Microstrip Gas Counters

2014 ◽  
pp. 31-51
Keyword(s):  
Glass Surface ◽  
Two Dimensional ◽  
Large Area ◽  
Proportional Chamber ◽  
Microelectronic Technology ◽  
Multiwire Proportional Chamber ◽  
Dimensional Version ◽  
A Chain ◽  
New Generation ◽  
First Time

In this chapter, the first micropattern gaseous detector, the microstrip gas counter, invented in 1988 by A. Oed, is presented. It consists of alternating anode and cathode strips with a pitch of less than 1 mm created on a glass surface. It can be considered a two-dimensional version of a multiwire proportional chamber. This was the first time microelectronic technology was applied to manufacturing of gaseous detectors. This pioneering work offers new possibilities for large area planar detectors with small gaps between the anode and the cathode electrodes (less than 0.1 mm). Initially, this detector suffered from several serious problems, such as charging up of the substrate, discharges which destroyed the thin anode strips, etc. However, by efforts of the international RD28 collaboration hosted by CERN, most of them were solved. Although nowadays this detector has very limited applications, its importance was that it triggered a chain of similar developments made by various groups, and these collective efforts finally led to the creation of a new generation of gaseous detectors-micropattern detectors.

Efficiency calibration of a large-area neutron detector by using Am/Be neutron source

2005 ◽  
Vol 52 (1) ◽  
pp. 473-477 ◽  
Author(s):  
Q.Y. Hu ◽  
Y.L. Ye ◽  
Z.H. Li ◽  
X.Q. Li ◽  
D.X. Jiang ◽  
...  
Keyword(s):  
Neutron Source ◽  
Neutron Detector ◽  
Efficiency Calibration ◽  
Large Area

scholarly journals MBGEM: a stack of borated GEM detector for high efficiency thermal neutron detection

2021 ◽  
Vol 136 (7) ◽  
Author(s):  
A. Muraro ◽  
G. Claps ◽  
G. Croci ◽  
C. C. Lai ◽  
R. De Oliveira ◽  
...  
Keyword(s):  
Thermal Neutron ◽  
Neutron Detector ◽  
Large Scale ◽  
High Efficiency ◽  
Detection Efficiency ◽  
Neutron Spallation Source ◽  
High Detection Efficiency ◽  
Thermal Neutron Detector ◽  
Spallation Source ◽  
Alpha 7

AbstractA new position-sensitive thermal neutron detector based on boron-coated converters has been developed as an alternative to today’s standard $$^3\mathrm{He}$$ 3 He -based technology for application to thermal neutron scattering. The key elements of the development are the boron-coated GEM foils (Sauli in Nucl Instrum Methods Phys Res Sect A Accel Spectrom Detect Assoc Equip 386:531, 1997) that are used as a multi-layer neutron converter via the $$^{10}\mathrm{B}(n,\alpha )^7\mathrm{Li}$$ 10 B ( n , α ) 7 Li reaction together with an efficient collection of the produced secondary electrons. This paper reports the test performed on a 3 layers converter prototype coupled to a GEMPix detector (Murtas in Radiat Meas 138:106421, 2020), carried out in order to study the possibility to produce a large-scale multi-layer neutron detector capable to reach high detection efficiency with high spatial resolution and able to sustain the high neutron flux expected in the new neutron spallation source under development like the ESS.

HgI2 Two-Dimensional Arrays Based on Resistive Charge Division Readout

1997 ◽  
Vol 487 ◽  
Author(s):  
S. Alfieri ◽  
N. De Cesare ◽  
D. Grassi ◽  
E. Perillo ◽  
G; Spadaccini ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Basic Research ◽  
Low Noise ◽  
Cathode Layer ◽  
Two Dimensional ◽  
Space Applications ◽  
Resistive Layer ◽  
X Ray ◽  
High Detection Efficiency ◽  
Large Active Area

AbstractNewly designed HgI2 two-dimensional arrays based on resistive charge division, obtained by depositing a Ge surface resistive layer between the readout Pd strips, have been fabricated. These detectors, coupled with very low noise preamplifiers, have shown a high detection efficiency over a large active area and an energy resolution of 15% for X-ray energy Ex =60 keV (241Am), becoming ≈ 9% at Ex = 122 keV (57Co). Further, a spatial sensitivity of ≈ 5 μm and a spatial resolution of ≈ 40 μim in both the directions parallel to the anode and to the cathode strips have been obtained at an energy equivalent to ≈ 40 keV, by making use, for a fine spatial characterization of the devices, of a laser beam spot with wavelength tuned to match the crystal bandgap (582 nm). These devices, with optimized cathode layer resistances, could be successfully employed in basic research (for example Bragg X-ray spectrometry) and for imaging in radiological and space applications, at least in the important energy range 40 <Ex <120 keV.

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