scholarly journals A new neutron detector with a high position resolution for the study of the (p,pn) reaction on rare isotopes

2014 ◽  
Vol 66 ◽  
pp. 11022 ◽  
Author(s):  
Y. Kubota ◽  
M. Sasano ◽  
T. Uesaka ◽  
M. Dozono ◽  
M. Itoh ◽  
...  
Keyword(s):  
Neutron Detector ◽  
Position Resolution ◽  
High Position ◽  
Rare Isotopes

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.

APPLICATION OF A ONE-DIMENSIONAL POSITION SENSITIVE CHAMBER ON SYNCHROTRON RADIATION

2014 ◽  
Vol 27 ◽  
pp. 1460142
Author(s):  
HUIRONG QI ◽  
MEI LIU
Keyword(s):  
Synchrotron Radiation ◽  
Low Cost ◽  
Large Area ◽  
Position Resolution ◽  
One Dimensional ◽  
X Ray ◽  
High Position ◽  
Standard Data ◽  
Wire Chamber ◽  
The One

In the last few years, wire chambers have been frequently used for X-ray detection because of their low cost, large area and reliability. X-ray diffraction is an irreplaceable method for powder crystal lattice measurements. A one-dimensional single-wire chamber has been developed in our lab to provide high position resolution for powder diffraction experiments using synchrotron radiation. There are 200 readout strips of 0.5 mm width with a pitch of 1.0 mm in the X direction, and the working gas is a mixture of Ar and CO2 (90/10). The one-dimensional position of the original ionization point is determined by the adjacent strip's distribution information using the center of gravity method. Recently, a study of the detector's performance and diffraction image was completed at the 1W1B laboratory of the Beijing Synchrotron Radiation Facility (BSRF) using a sample of SiO2. Most of the relative errors between the measured values of diffraction angles and existing data were less than 1%. The best position resolution achieved for the detector in the test was 71 μm (σ value) with a 20 μm slit collimator. Finally, by changing the detector height in incremental distances from the center of the sample, the one-dimensional detector achieved a two-dimensional diffraction imaging function, and the results are in good agreement with standard data.

Use Of A Capillary X-Ray Focused Beam To Investigate The Chemical Composition Of CdZnTe Wafers With High Resolution CdZnTe Detectors

1997 ◽  
Vol 487 ◽  
Author(s):  
P. Fougères ◽  
Ch. Burggraf ◽  
Chr. Burggraf ◽  
J. M. Koebel ◽  
C. Koenig ◽  
...  
Keyword(s):  
High Resolution ◽  
High Sensitivity ◽  
X Rays ◽  
Position Resolution ◽  
X Ray ◽  
High Position ◽  
Cdznte Detector ◽  
Cdznte Detectors ◽  
Focused Beam ◽  
New System

AbstractThe control of the concentration of Zn and its fluctuation in the high pressure Bridgman grown CdZnTe crystals is part of our characterization work on the ternary grown ingots grown in house. In order to reach both high sensitivity and high position resolution, we have developed a new system consisting of a X-ray generator, coupled to a focusing X-ray capillary, delivering intense beams in the micron scale, since the intensity gain is around a factor of 100 compared to conventional methods.The characteristic X-rays are measured through a high resolution CdZnTe detector (225 eV at 5.9 keV FWHM) cooled by a Peltier system. The results of our investigations on different kinds of crystals will be discussed.

Automated Stand for Measurements of Electrostatic Beam Position Monitors Parameters

2012 ◽  
Vol 7 (4) ◽  
pp. 49-56
Author(s):  
Evgeny Bekhtenev ◽  
Gennadiy Karpov
Keyword(s):  
Quality Control ◽  
Charged Particle ◽  
Particle Beam ◽  
High Accuracy ◽  
Charged Particle Beam ◽  
Beam Position ◽  
Position Resolution ◽  
High Position ◽  
Coordinate Grid ◽  
Beam Position Monitors

A stand for measurements of the electrostatic beam position monitors (BPM) parameters is described. BPM parameters are measured with help of movable antenna modeling the charged-particle beam. Moving of the antenna is performed on two orthogonal directions with help of stepping motors. Full automation facilitates the measurements of BPM coordinate grid with high position resolution. Stand electronics allows BPM parameters measurements with high accuracy. Measurements at the stand performed with BPMs have demonstrated repeatability of the measurements results at level of 10–15 microns what satisfies all requirements to stand. The stand described in the paper was used for quality control of electrostatic BPM production

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