Composite neutron target suitable for BNCT system

Abstract

The invention relates to a composite neutron target suitable for a BNCT system. A target plate is included. The target plate comprises a tantalum target layer, a beryllium target layer and a heat dissipation base layer which are sequentially distributed. The tantalum target layer is made of metal tantalum and / or tantalum alloy, and is located on a front portion of the target plate. The beryllium target layer is made of metal beryllium and / or beryllium alloy and located between the tantalum target layer and the heat dissipation base layer. A coolant flow channel is arranged in the heat dissipation base layer and / or between the heat dissipation base layer and the beryllium target layer, and the coolant flow channel is provided with an inlet and outlet port. The heat dissipation base layer iscomposed of a heat dissipation single layer or a plurality of heat dissipation single layers, one or more connected grooves are arranged in an inner surface of the target body of at least one heat dissipation single layer, and the coolant flow channel is composed of the grooves arranged in the inner surface of the target body of the heat dissipation single layer. The neutron target is mainly applied to a device for generating neutrons by irradiating a target material with protons, such as a boron neutron capture therapy cancer system, and has advantages of a high neutron yield and a good heatdissipation effect.

Description

technical field [0001] The invention relates to a composite neutron target adapted to a BNCT system, mainly used in a device for generating neutrons by proton irradiation on a target, such as a boron neutron capture therapy cancer (BNCT) system and other devices for generating neutrons by irradiating a neutron target with protons . Background technique [0002] BNCT is the best treatment for cancer that can be foreseen so far, and it uses a non-toxic boron-containing ( 10 B) The drug is injected into the blood of the human body. After the boron-containing drug is automatically targeted and enriched in the nucleus of the cancer cell, the epithermal neutron beam is used to irradiate the tumor site, and thermal neutrons are formed in the treatment area through the slowing down of the human body. and 10 B has a high probability of nuclear reaction (3840 barn), through selective thermal neutron 10 B nuclear reaction, which emits radiation with a range smaller than the length o...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing invention patents use a single target

Since the proton energy emitted by the accelerator is a continuous distribution from the low-energy end to the high-energy end (up to 30MeV), and any single target has a high neutron yield only in a certain energy range, the neutrons of this single target The target cannot effectively use all the proton energy, affecting the neutron yield and causing unnecessary energy consumption

When used in BNCT, long start-up and treatment times are required, adversely affecting the patient

[0005] In addition, the heat dissipation effect of the existing neutron target is poor, and the temperature rises, which affects the normal operation of the system and the service life of the neutron target

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