Dual screen grid gas detector for physical measurement of fission fragments
A technology of gas detectors and fission fragments, which is applied in the direction of measuring devices, radiation measurement, neutron radiation measurement, etc., can solve the problem that the measurement accuracy depends on the chemical processing process and the detector accuracy, so as to avoid errors and complete measurement , the effect of radiation damage resistance
Pending Publication Date: 2019-01-08
LANZHOU UNIVERSITY
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[0009] To sum up, the problem existing in the existing technology is that the fission products need to be chemically processed again, and then the fission information is measured through a separate detector system, and the measurement accuracy strongly depends on the chemical processing process and the detector accuracy
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] Such as Figure 1~6 As shown, among them, figure 1 It is a structural schematic diagram of a double-screen grid gas detector of the present invention; figure 2 It is a structural schematic diagram of a double-screen grid gas detector in a cross-sectional state of the present invention; image 3 Schematic diagram of the cathode target material structure in the technology of the present invention; Figure 4 It is a structural schematic diagram of a gas detector used for fission measurement by the technology of the present invention; Figure 5 The anode and grid system acquisition and outp...
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Abstract
The invention discloses a dual screen grid gas detector for physical measurement of fission fragments. The detector comprises a cylinder of which the two ends are provided with openings and the innerside is hollow, the openings at the two ends of the cylinder are separately docked and sealed through an upper bottom plate and a lower bottom plate, the side wall of the cylinder is provided with anionized gas inlet and an ionized gas outlet, and a first anode plate, a first grid ring, a cathode plate, a second grid ring and a second anode plate are sequentially arranged in the cylinder in the direction from the upper bottom plate to the lower bottom plate; a location for holding a cathode target material that needs fission is arranged in the center of the cathode plate, and the location directly faces a neutron incident window arranged on the upper bottom plate. The detector disclosed by the invention avoids errors caused by the chemical treatment and step-by-step measurement in a traditional measurement technology, and has the advantages of resisting radiation damages, measuring initial fission fragment information and the like; and the resolution of the detector can be less than 1atomic mass unit, and thus the mass distribution information of the fission fragments and the kinetic energy distribution information of the fission fragments can be measured more accurately and completely.
Description
technical field [0001] The invention belongs to the technical field of nuclear physics detection, and in particular relates to a double-screen gas detector for kinetic energy measurement and mass measurement of fission fragments of heavy nuclear fission induced by neutrons. Background technique [0002] A new type of nuclear energy utilization system proposed in recent years, using fissionable nuclear 232 Th, 238 U produces energy, which has the advantages of good safety, high economy, small nuclear waste output, transmutation of nuclear waste, and anti-nuclear proliferation. It has become the latest direction of nuclear power development in the world. The research and development of new nuclear energy utilization system has a great impact on neutron induced 232 Th, 233，235，238 U 237 Np, 239 Pu, 241 The fission evaluation data of heavy actinides such as Am put forward higher precision requirements, among which, the fission fragment yield distribution data and the fissi...
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IPC IPC(8): G01T3/00G01N27/00G01N27/60
CPCG01N27/00G01N27/60G01T3/00
Inventor 韦峥姚泽恩张宇卢小龙王俊润
Owner LANZHOU UNIVERSITY