Electron beam generator for simulating beta radiation source and test method

Abstract

The invention discloses an electron beam generator for simulating a beta radiation source and a test method, the electron beam generator comprises an electron optical system, the electron optical system comprises an electron gun, a positive electrode, a primary magnetic lens and a secondary magnetic lens; the electron gun is used for emitting electrons at the tip, and the electron gun is connected with a high-voltage power supply with the voltage range of 0-60kV; the positive electrode is arranged at the rear end of the electron gun; the accelerator is used for accelerating electrons emitted at the tip; the primary magnetic lens is arranged at the rear end of the positive electrode and is used for converging the accelerated electrons; and the second-stage magnetic lens is arranged at the rear end of the first-stage magnetic lens and is used for changing the electron beams diverging again through the focus into parallel electron beams. The electron beam generator not only can simulate a beta radiation source, but also can generate accelerated electron surface light sources with different energy densities, and can improve the accuracy of beam measurement.

Description

technical field [0001] The invention relates to the technical field of radiation source detection, in particular to an electron beam generator and a test method for simulating a beta radiation source. Background technique [0002] At present, the radiation source of micro-isotope batteries generally chooses the β radiation source that only radiates electrons. The energy radiated by the low-energy β radiation source is mostly in the keV level, which will not cause radiation damage to the energy conversion material, and will not cause radiation damage when the activity is low. It is a relatively safe source of radiation that can cause permanent damage to the human body. 63 The Ni radiation source has a long half-life and moderate β particle energy, so it is often used as a radiation source for isotope batteries. but 63 The price of Ni radiation source is relatively expensive, and improper operation will endanger the health of operators. [0003] because 63 Beta radiation s...

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Problems solved by technology

but 63 The price of Ni radiation source is relatively expensive, and improper operation will endanger the health of operators

[0003] because 63 Beta radiation sources such as Ni are not only expensive, but also have certain radiation properties. Therefore, for 63 The test of β radiation sources such as Ni has certain limitations, so it is necessary to design a method that can simulate 63 Electron generators for β radiation sources such as Ni. The existing electron accelerators are based on scanning electron microscopes, which can only generate point light sources, which cannot accurately measure the beam current of the electron beam.

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