Evaluation of the residual radiation field in the proton accelerator facility of the Proton Engineering Frontier Project (PEFP) in Korea

2007 ◽  
Vol 580 (1) ◽  
pp. 656-659 ◽  
Author(s):  
C.W. Lee ◽  
Y.O. Lee ◽  
Y.S. Cho
Keyword(s):  
Radiation Field ◽  
Proton Accelerator ◽  
Accelerator Facility

scholarly journals A compact electron cyclotron resonance proton source for the Paul Scherrer Institute's proton accelerator facility

2011 ◽  
Vol 82 (5) ◽  
pp. 053304 ◽  
Author(s):  
C. Baumgarten ◽  
A. Barchetti ◽  
H. Einenkel ◽  
D. Goetz ◽  
P. A. Schmelzbach
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Electron Cyclotron ◽  
Proton Accelerator ◽  
Accelerator Facility ◽  
Proton Source ◽  
Paul Scherrer

scholarly journals Measurement of displacement cross section of structural materials utilized in the proton accelerator facilities with the kinematic energy above 400 MeV

2020 ◽  
Vol 239 ◽  
pp. 06006
Author(s):  
Shin-ichiro MEIGO ◽  
Hiroki MATSUDA ◽  
Yosuke IWAMOTO ◽  
Makoto YOSHIDA ◽  
Shoichi HASEGAWA ◽  
...  
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Lower Energy ◽  
Previous Experiment ◽  
Calculation Model ◽  
Proton Accelerator ◽  
Damage Estimation ◽  
Accelerator Facility ◽  
The Difference ◽  
Displacement Per Atom

For damage estimation of structural material in the accelerator facility, displacement per atom (DPA) is widely employed as an index of the damage calculated based on the displacement cross section obtained with the calculation model. Although the DPA is employed as the standard, the experimental data of displacement cross section are scarce for a proton in the energy region above 20 MeV. Among the calculation models, the difference exists about 8 times so that experimental data of the displacement cross section is crucial to validate the model. To obtain the displacement cross section, we conducted the experiment in J-PARC. As a preliminary result, the displacement cross section of copper was successfully obtained for 3-GeV proton. The present results showed that the widely utilized the Norgertt-Robinson-Torrens (NRT) model overestimates the cross section as suggested by the previous experiment for protons with lower energy.

AN EXPERIMENTAL STUDY ON RADIATION STREAMING THROUGH A LABYRINTH IN A PROTON ACCELERATOR FACILITY OF INTERMEDIATE ENERGY

2001 ◽  
Vol 81 (4) ◽  
pp. 406-418 ◽  
Author(s):  
Su. Tanaka ◽  
H. Nakashima ◽  
Y. Sakamoto ◽  
Y. Nakane ◽  
S. Meigo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Intermediate Energy ◽  
Proton Accelerator ◽  
Accelerator Facility

Figuring of Aspherical Metal Mirror Substrate for Neutron Focusing by Numerically Controlled Electrochemical Machining

2012 ◽  
Vol 523-524 ◽  
pp. 29-33 ◽  
Author(s):  
Takaaki Tabata ◽  
Mikinori Nagano ◽  
Dai Yamazaki ◽  
Ryuji Maruyama ◽  
Kazuhiko Soyama ◽  
...  
Keyword(s):  
Neutron Beam ◽  
Low Cost ◽  
Electrochemical Machining ◽  
Cost Effective ◽  
Chromatic Aberration ◽  
Fabrication Process ◽  
Proton Accelerator ◽  
X Rays ◽  
Accelerator Facility ◽  
Aspherical Mirror

Neutron beam generated by high intensity proton accelerator facility is powerful tool to investigate characteristics of soft and hard materials. However, neutron beam is not major tool for material science since intensity of neutron beam is very weak compared to that of X-rays. Neutron focusing device is required to increase in intensity of neutron beam. Aspherical supermirror is effective for neutron focusing with wide wavelength range without chromatic aberration. In this research, we proposed a fabrication process for large and cost-effective aspherical mirror substrate made of aluminum alloy because metal can be figured coarsely at low cost by using conventional machining. The mirror fabrication process proposed by us consists of grinding for coarse figuring, numerically controlled electrochemical machining (NC-ECM) to correct objective shape with form accuracy of sub-micrometer level and low-pressure polishing to decrease in surface roughness to sub-nanometer level. In the case of figure correction of the mirror substrate by NC-ECM, deterministic correction is realized because NC-ECM is a non-contact electrochemical removal process for metal materials, without workpiece deformation. In this paper, we report fundamental machining characteristics of ECM, which uses electrode with a diameter of 10 mm and NaNO3 electrolyte.

scholarly journals Status on Shielding Design Study for the High-Intensity Proton Accelerator Facility

2002 ◽  
Vol 39 (sup2) ◽  
pp. 1264-1267
Author(s):  
Nobuo Sasamoto ◽  
Hiroshi Nakashima ◽  
Hideo Hirayama ◽  
Tokushi Shibata
Keyword(s):  
High Intensity ◽  
Proton Accelerator ◽  
Design Study ◽  
Accelerator Facility ◽  
Shielding Design

Estimation of Radioactivity Produced in Cooling Water at High-Intensity Proton Accelerator Facility

2009 ◽  
Vol 168 (3) ◽  
pp. 680-684
Author(s):  
Fumihiro Masukawa ◽  
Yoshihiro Nakane ◽  
Yosuke Iwamoto ◽  
Hiroshi Nakashima
Keyword(s):  
High Intensity ◽  
Cooling Water ◽  
Proton Accelerator ◽  
Accelerator Facility
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