Beta particle beam measuring device

Abstract

The invention provides a beta particle beam measuring device which comprises an anode plate, a secondary ionization chamber formed by a metal spacer ring, a secondary ionization plate and a first insulating film which are laminated on one plate surface of the anode plate, and a main ionization chamber formed by a main ionization plate, a second insulating film and a main ionization plate compression ring which are laminated on the other plate surface of the anode plate; a flattening and filtering device is arranged on the main ionization plate compression ring through a plastic spacer ring; the flattening and filtering device comprises a flattening block compression ring, a third insulating film and a fourth insulating film with a flattening block in the middle, which are stacked on the plastic spacer ring; the main ionization chamber, the secondary ionization chamber and the flattening and filtering device are fixed between the top cover and the bottom plate; the top cover is provided with a plurality of binding posts which are inserted into the secondary ionization chamber, the anode plate and the main ionization plate; the secondary ionization plate, the main ionization plate, the anode plate, the first insulating film, the second insulating film, the third insulating film and the fourth insulating film are all made of polyurethane materials.

Description

technical field [0001] The invention relates to the technical field of radiation measuring devices, in particular to a beta particle beam current measuring device. Background technique [0002] Beta particle beam, also known as beta ray, is a high-speed charged particle. Its ionization ability is much smaller than that of alpha rays, but its penetrating power is larger than that of alpha rays. However, it has a shorter range than X and gamma rays than beta rays, so it is easy to Absorbed by materials such as aluminum foil and plexiglass. But entering human tissue and skin can produce biothermal effect with biological cells and kill cell tissue. Because of this characteristic of β-ray, this kind of ray is used in medicine to treat tumors and cell proliferation in skin and superficial parts. β-ray It is a double-edged sword that can kill both tumor cells and normal tissue cells. How to use it quantitatively for the treatment of human solid tumors has always been a difficult p...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a beta particle beam current measuring device, the purpose of which is to solve the problems that the existing beta particle beam current measuring device has short service life, low measurement accuracy and is easily affected by external conditions

Images