Measurement of Yield and Energy Spectrum of Secondary Electrons Emitted by Fission from Uranium-Oxide Cathode for Neutron Streak Tube
We describe a method for measuring the yield and energy spectrum of secondary electrons emitted by fission from a uranium-oxide cathode for a neutron streak tube. In a compact vacuum chamber about 1-μm thick uranium-oxide cathodes made by an evaporation process were irradiated by D-T neutrons. The s...
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Published in | Journal of nuclear science and technology Vol. 25; no. 10; pp. 780 - 788 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Tokyo
Taylor & Francis Group
01.10.1988
Taylor & Francis Ltd |
Subjects | |
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Abstract | We describe a method for measuring the yield and energy spectrum of secondary electrons emitted by fission from a uranium-oxide cathode for a neutron streak tube. In a compact vacuum chamber about 1-μm thick uranium-oxide cathodes made by an evaporation process were irradiated by D-T neutrons. The secondary electrons emitted from the cathode were detected with a microchannel plate for which gain and efficiency were determined. The yield of the secondary electrons was determined from the average output charge of the microchannel plate and was found to be about 400 electrons per fission. The energy spectrum of the secondary electrons was also obtained by using a suppression grid technique. It was found from the spectrum that the average energy of the secondary electrons was about 5 eV and about 30% of them had an energy higher than 5 eV. These results are good guides to design of the electrode structure of the neutron streak tube. Also the present method can be efficiently used for optimizing the uranium-oxide cathode. |
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AbstractList | We describe a method for measuring the yield and energy spectrum of secondary electrons emitted by fission from a uranium-oxide cathode for a neutron streak tube. In a compact vacuum chamber about 1-μm thick uranium-oxide cathodes made by an evaporation process were irradiated by D-T neutrons. The secondary electrons emitted from the cathode were detected with a microchannel plate for which gain and efficiency were determined. The yield of the secondary electrons was determined from the average output charge of the microchannel plate and was found to be about 400 electrons per fission. The energy spectrum of the secondary electrons was also obtained by using a suppression grid technique. It was found from the spectrum that the average energy of the secondary electrons was about 5 eV and about 30% of them had an energy higher than 5 eV. These results are good guides to design of the electrode structure of the neutron streak tube. Also the present method can be efficiently used for optimizing the uranium-oxide cathode. |
Author | YAMANAKA, Tatsuhiko YAMANAKA, Masanobu MIYANAGA, Noriaki IIDA, Toshiyuki SUMITA, Kenji YAMAMOTO, Takayoshi ARAKI, Tatsuya MIYAKE, Chie |
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Cites_doi | 10.1063/1.1139168 10.1063/1.1713994 10.1063/1.1139170 10.1063/1.1728810 10.1063/1.1138234 |
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Copyright | Copyright Taylor & Francis Group, LLC 1988 Copyright Japan Science and Technology Agency 1988 |
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References | Jamerson F. E. (CIT0008) 1965; 36 Yamanaka T. (CIT0004) 1986; 55 Wakg C. L. (CIT0002) 1985; 56 Wang C. L. (CIT0003) 1986; 57 Wang C. L. (CIT0001) 1982; 348 Niki H. (CIT0006) 1986; 57 CIT0007 Sumita K. (CIT0009) 1982; 1 Yamanaka T. (CIT0005) 1986 |
References_xml | – volume: 348 start-page: 278 year: 1982 ident: CIT0001 publication-title: SPIE contributor: fullname: Wang C. L. – volume: 55 start-page: 36 year: 1986 ident: CIT0004 publication-title: Oyo Buturi, (in Japanese) contributor: fullname: Yamanaka T. – start-page: 55 year: 1986 ident: CIT0005 publication-title: Proc. on US-Japan Workshop A-56 “Irradiation Effects on Plasma Diagnostic Equipment” contributor: fullname: Yamanaka T. – volume: 57 start-page: 1743 year: 1986 ident: CIT0006 publication-title: Rev. Sci. Instrum. doi: 10.1063/1.1139168 contributor: fullname: Niki H. – volume: 36 start-page: 355 year: 1965 ident: CIT0008 publication-title: J. Appl. Phys. doi: 10.1063/1.1713994 contributor: fullname: Jamerson F. E. – volume: 57 start-page: 1749 year: 1986 ident: CIT0003 publication-title: Rev. Sci. Instrum. doi: 10.1063/1.1139170 contributor: fullname: Wang C. L. – ident: CIT0007 doi: 10.1063/1.1728810 – volume: 1 start-page: 675 year: 1982 ident: CIT0009 publication-title: Proc. 12th Symp. Fusion Technology, Jülich contributor: fullname: Sumita K. – volume: 56 start-page: 1096 year: 1985 ident: CIT0002 publication-title: Rev. Sci. Instrum. doi: 10.1063/1.1138234 contributor: fullname: Wakg C. L. |
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SubjectTerms | D-T neutrons energy spectra laser fusion diagnostics microchannel plate neutron streak tube secondary electron yield secondary electrons suppression grid uranium-oxide cathode |
Title | Measurement of Yield and Energy Spectrum of Secondary Electrons Emitted by Fission from Uranium-Oxide Cathode for Neutron Streak Tube |
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