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Synchronously controllable large dynamic pulse neutron measurement system

A pulsed neutron and measurement system technology, which is used in the measurement of neutron radiation, radiation measurement, measurement devices, etc., can solve difficult measurement accuracy, limited neutron yield range, and inability to accurately predict neutron yield, etc. problems, to achieve the effect of improving measurement accuracy and improving measurement efficiency

Pending Publication Date: 2020-04-10
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

Since the gamma-ray detector has a certain linear range, the range of neutron yield measured after activation using a single-size sample is limited, resulting in the fact that the neutron yield in fusion physics experiments cannot usually be accurately predicted, even if a single-size sample is used It is difficult to obtain high measurement accuracy. At the same time, the measurement accuracy of transient neutron yield in fusion physics experiments is also related to the control accuracy of the distance from the sample to the target neutron source and the synchronization accuracy of the activated sample measurement time. A measurement system that can take into account many of the above problems to improve the measurement accuracy of transient neutron yield in experiments

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  • Synchronously controllable large dynamic pulse neutron measurement system
  • Synchronously controllable large dynamic pulse neutron measurement system
  • Synchronously controllable large dynamic pulse neutron measurement system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0024] refer to figure 1 and Figure 4 The synchronously controllable large dynamic pulsed neutron measurement system shown mainly includes a target chamber 23, a sample carrying component, a centralized control box 9, a gamma measurement component and a trigger synchronization controller 10, wherein the target chamber 23 is generally in the shape of a hollow sphere The structure is mainly used to place the target neutron source 1, and one side thereof has a left mounting flange 24 communicating with the interior thereof.

[0025] In this embodiment, the sample carrying assembly mainly includes a corrugated expansion tube 6, a vacuum isolation cylinder 7, and a sample holder 4 located in the vacuum isolation cylinder 7. As shown in the figure, the front end of the vacuum isolation cylinder 7 is closed, and the rear end is closed. Open, the corrugated telesc...

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Abstract

The invention discloses a synchronously controllable large dynamic pulse neutron measurement system. The system comprises a target bin for placing a target neutron source and a sample carrying assembly, the sample carrying assembly comprises a vacuum isolation straight cylinder and a sample fixing piece positioned in the vacuum isolation straight cylinder, under the driving of a driving mechanism,the vacuum isolation straight cylinder moves linearly to be close to or far away from the target neutron source positioned in the target bin, the sample fixing piece is provided with carrying holes with at least two diameter specifications and / or depth specifications, the carrying holes are used for fixing a to-be-activated sample, and the system also includes a centralized control box, a gamma measurement assembly for measuring the neutron yield of the activated sample, and a trigger synchronous controller for controlling the working time nodes of the centralized control box and the gamma energy spectrum recorder. A synchronous measurement control mechanism is cooperated with the movable vacuum isolation straight cylinder and the sample fixing piece with carrying holes of various specifications, the requirement for large-range neutron yield measurement is met, the time of each step is precisely controlled, and the measurement precision and efficiency are greatly improved.

Description

technical field [0001] The invention relates to the field of neutron measurement equipment, in particular to a synchronously controllable large dynamic pulse neutron measurement system. Background technique [0002] In fusion physics experiments, fusion neutrons are produced in a very short time. The transient neutron yield is usually given using a neutron activation measurement system. Fusion neutrons excite characteristic activated nuclides in the activated sample target material, and the activated sample target material is transported to the gamma ray detector for characteristic gamma ray measurement. Since the gamma-ray detector has a certain linear range, the range of neutron yield measured after activation using a sample of a single size is limited, resulting in that the neutron yield in fusion physics experiments cannot usually be accurately predicted, even if a sample of a single size is used It is difficult to obtain high measurement accuracy. At the same time, th...

Claims

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Application Information

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IPC IPC(8): G01T3/00
CPCG01T3/00
Inventor 宋仔峰易涛肖云青唐琦詹夏宇刘中杰陈家斌
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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