Measurements and characteristics of Al_(2)O_(3):Cr^(3+) coating for the proton beam imaging system
作者机构：Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049China Dongguan Neutron Science CenterDongguan 523803China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of ScienceBeijing 100190China
出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)
年 卷 期：2017年第1卷第1期
页 面：54-60页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：Supported by the China Spallation Neutron Source Project,the National Science Foundation of China(Grant Nos.11575289) the Project onthe Integration of Industry,Education&Research of Guangdong Province,China(Grant No.2015B090901048)
主 题：Al_(2)O_(3):Cr^(3+)luminescence coating Beam diagnostics Spallation target
摘 要：Introduction To set up an online proton beam diagnostic system near the neutron production target of China Spallation Neutron Source(CSNS),a luminescence coating sprayed on the target windowand a corresponding optic system were *** the work,the fabrication of Al_(2)O_(3):Cr^(3+) coating was *** on the sprayed samples were performed to analyze the characteristics of the Al_(2)O_(3):Cr^(3+) *** and tests of coating samples Three kinds of powders with different Cr concentrations were used to fabricate the luminescence coating *** flame spraying,plasma spraying and D-gun spraying processes were ***(PL),X-ray diffraction(XRD),scanned electron mirror(SEM)and radioluminescence experiment by 300 MeV deuterium beam were carried out to analyze and characterize the *** The emission spectrum excited by 532-nm laser has two obvious peaks at 692.9 nm and 694.3 *** samples by flame spraying process with the powders obtained from melting method show higher luminescence intensity than the samples by plasma spraying *** is observed that the luminescence intensity has some relationships with the alpha phase in the samples,which is deduced from the XRD and photoluminescence tests results.A lower temperature during the flame spraying process will help to keep more alpha phase in the *** selected four samples show successful fluoresced results in the radioluminescence *** The luminescence intensity of the coating is improved greatly by the studies on the fabrication process and the characteristics of the *** luminescence coating used in beam diagnostics will be fabricated by the confirmed technical *** works will be continued to improve the characteristics of the luminescence light by controlling Cr concentration and annealing in 1200∼2000℃ environment in the future.
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