Fusion neutron detector calibration using a table-top laser generated plasma neutron source

2005 ◽  
Vol 540 (2-3) ◽  
pp. 464-469 ◽  
Author(s):  
R. Hartke ◽  
D.R. Symes ◽  
F. Buersgens ◽  
L.E. Ruggles ◽  
J.L. Porter ◽  
...  
Keyword(s):  
Neutron Source ◽  
Neutron Detector ◽  
Detector Calibration ◽  
Fusion Neutron

scholarly journals Detailed reproduction of the neutron emission from the compact DT neutron generator used as an in-situ 14 MeV calibration neutron source at JET

2020 ◽  
Vol 225 ◽  
pp. 02005
Author(s):  
Aljaž Čufar ◽  
Paola Batistoni ◽  
Zamir Ghani ◽  
Luca Giacomelli ◽  
Igor Lengar ◽  
...  
Keyword(s):  
Neutron Source ◽  
Neutron Detector ◽  
Neutron Generator ◽  
Neutron Emission ◽  
Detailed Model ◽  
Detector Calibration ◽  
Emission Properties ◽  
In Situ Calibration ◽  
Mixed Beam

A compact DT neutron generator (NG) based on the mixed-beam operation was used as a calibration neutron source in the latest in-situ calibration of neutron detectors at the Joint European Torus (JET). In order to meet the requirement for the total uncertainty of the neutron detector calibration below ±10 %, the neutron emission properties had to be experimentally characterized and reproduced through detailed modelling of the neutron source characteristics and geometry of the neutron generator. The detailed neutronics simulations were an essential part of both NG characterization and JET neutron detector calibration. The complex neutron emission properties of the NG were reproduced through a combination of simulations and highresolution neutron spectroscopy measurements. This meant that six different DT neutron source components resulting from NG's mixed beam operation were explicitly simulated and their relative intensities scaled based on experimentally obtained neutron spectrum measurements. Furthermore, the detailed model of the NG's geometry was produced based on information from the supplier of the NG and images from a computer tomography (CT) scan. Finally, the positioning of the neutron source inside the JET tokamak during in-situ calibration was reproduced based on the information from the remote handling system (RHS) at JET, the system responsible for the positioning of the source during the calibration experiment. The extensive effort presented in the paper significantly contributed to the total uncertainties of the calibration factors well within the target value of ±10 %.

scholarly journals Point Defects Observed in D-T neutron irradiated Copper, Silver and Gold at 288 K with a Rotating Target in FNS_JAERI

2000 ◽  
Vol 650 ◽  
Author(s):  
Y. Shimomura ◽  
K. Sugio ◽  
H. Ohkubo ◽  
I. Mukouda ◽  
C. Kutsukake ◽  
...  
Keyword(s):  
Neutron Source ◽  
Neutron Irradiation ◽  
Point Defects ◽  
Thin Foil ◽  
Energy Research ◽  
Vacancy Clusters ◽  
Fusion Neutron ◽  
Fusion Neutron Source ◽  
Damage Cascade ◽  
Rotating Target

ABSTRACTA 14 MeV D-T(fusion) neutron irradiation was carried out at fusion neutron source facility (FNS) in Japan Atomic Energy Research Institute (JAERI). Specimen temperature was controlled to 288 K. Fluence was 6.1 × 1017to 1.1 × 1021 n/m2. Both TEM thin foil and bulk specimens were irradiated at the same position. At 1018 n/m2, defects observed were single isolated dot defects. With increasing fluence, dot defects changed to complicate structure and made groupings. In a dot group, interstitial clusters and vacancy clusters were observed together. The present result was explained by the modeling that point defects in a nascent damage cascade move in crystal at 288 K and form their defect groupings.

Assessment of radiation damage of the first wall of a fusion neutron source DEMO-FNS with a blanket for transmutation of minor actinides

2021 ◽  
Author(s):  
Alexey V. Zhirkin ◽  
V P Budaev ◽  
Alexander O Goltsev ◽  
Alexey V Dedov ◽  
Alexander T Komov ◽  
...  
Keyword(s):  
Radiation Damage ◽  
Neutron Source ◽  
Minor Actinides ◽  
First Wall ◽  
Fusion Neutron ◽  
Fusion Neutron Source

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.

Characteristics of Gas Mixture Supply/Pressure Control Using Non-Evaporable Getters in a Discharge-Type Fusion Neutron Source

2017 ◽  
Vol 72 (4) ◽  
pp. 773-779
Author(s):  
Yasushi Yamamoto ◽  
Hiroki Konda ◽  
Yuki Matsuyama ◽  
Hodaka Osawa ◽  
Masami Ohnishi
Keyword(s):  
Neutron Source ◽  
Pressure Control ◽  
Gas Mixture ◽  
Fusion Neutron ◽  
Supply Pressure ◽  
Fusion Neutron Source
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