Device and method for measuring components of deuterium ion beam of deuterium-tritium neutron tube

Abstract

The invention provides a device and a method for measuring the components of a deuterium ion beam of a deuterium-tritium neutron tube. Before the deuterium-tritium neutron tube is vacuumized or sealed, an aluminum membrane with an appropriate thickness is arranged at a target position; and according to a situation that the ranges of deuterium ions and metal ions in the aluminum membrane are different, under the condition that the thickness of the aluminum membrane is appropriate, heavy ions can be completely blocked in the aluminium membrane, and the deuterium ions can pass through the aluminum membrane. A deuterium ion beam passing through the aluminum membrane is divided by a total ion beam (the sum of the passed ion beams and the ion beams blocked in the aluminum membrane), so that the components of the deuterium ion beam can be obtained. The device disclosed by the invention is simple in structure and easy to operate, and can carry out in-situ effective measurement on the components of the deuterium ion beam near the target position of the neutron tube, the ion beam is not diffused, and the measuring method is high in accuracy. According to the invention, equipment and materials are simple, and easy to prepare and purchase, and the influence of secondary electrons on measurement can be inhibited.

Description

technical field [0001] The invention belongs to the field of accelerators, in particular to a device for measuring the composition of deuterium-tritium ion beams in a deuterium-tritium neutron tube and a measuring method thereof, in particular to a deuterium-tritium neutron tube capable of measuring the composition of deuterium ion beams hitting a tritium target Apparatus and methods for making measurements. Background technique [0002] Deuterium-tritium fusion neutron tubes are widely used in the fields of non-destructive testing and oil logging. The deuterium-tritium neutron tube is composed of ion source, accelerating electrode, tritium target and air pressure adjustment system. Its working principle is that deuterium ions are generated by the discharge of the ion source, which are accelerated by the accelerating electrode and hit the tritium target to form a deuterium-tritium fusion reaction to generate 14MeV neutrons. The ion source produces both deuterium ions, deute...

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Problems solved by technology

In 2010, an article titled "Diagnostics of Hydrogen-Containing Electrode Pulse Discharge Plasma Characteristics" published in the fifth issue of the domestic publication "Strong Laser and Particle Beams" introduced the use of the time-of-flight method to measure the hydrogen ion beam composition of the ion source. The distance between the ion source exit and the measurement target is tens of centimeters, and the extraction (acceleration) voltage is less than 1kV. These methods cannot be used for in-situ measurement of the deuterium ion beam composition reaching the neutron tube target.

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