High current ion high voltage static accelerating tube

Abstract

The invention provides a high current ion high voltage static accelerating tube comprising an accelerating tube body; the accelerating tube body specifically comprises an entrance cylinder, an inlet flange, an inlet flange jacket, a magnetic lens device, an accelerating electrode, a double electron cloud space charge lens device, an outlet flange jacket, an outlet flange, an outlet cylinder, an insulating ring, an equalizing ring and an insulating column; the magnetic lens device is arranged between the inlet flange jacket and the entrance cylinder; the double electron cloud space charge lensdevice is arranged between the outlet flange jacket and the outlet cylinder; and the radius of the central round hole of each accelerating electrode is sequentially reduced along a beam transmission direction. According to the high current ion high voltage static accelerating tube, by using the interaction of the focusing electric field and beam-plasma, the ion focusing forces of the acceleratingarea and accelerating tube entrance area are separately enhanced, the beam dispersion caused by a strong space charge effect under the condition of high current ion beam is suppressed, the beam loss is reduced, the increasing of beam emittance is suppressed, and the efficient and stable acceleration of the high current ion beam can be achieved.

Description

technical field [0001] The invention relates to the technical field of particle accelerators, in particular to a high-voltage electrostatic acceleration tube for strong current ions. Background technique [0002] With the continuous development of science and technology, particle accelerator science and technology has made great achievements, and its application scope has gradually moved from the field of basic research to all fronts of industry, agriculture, medicine and national defense construction. Especially the recently developed accelerator-driven advanced nuclear energy system has gradually become a research hotspot in various countries. [0003] An accelerator is a device that artificially generates beams of high-energy charged particles. It uses a certain form of electromagnetic field to accelerate charged particles such as positive and negative electrons, protons, light and heavy ions to keV, MeV, GeV, TeV or higher energies. This kind of ion beam with relativel...

AI Technical Summary

Problems solved by technology

[0005] In the traditional high-voltage electrostatic accelerating tube design process, the withstand voltage level of the accelerating tube is limited by vacuum breakdown, which is mainly manifested in the following two aspects: 1) The withstand voltage gradient of the accelerating tube will increase with the increase of the total voltage of the accelerating tube 2) When the voltage reaches a certain threshold, a large amount of electron flow will suddenly appear in the accelerating tube, accompanied by strong X-rays. If the voltage continues to increase, the electron flow will increase sharply and soon exceed the load of the high-voltage generator capability, thus limiting further increases in voltage

At the same time, when the beam intensity accelerated by the accelerating tube is further increased, the nonlinear part of the strong space charge effect will cause the beam emittance to increase, so that the beam envelope of the high-current ion beam is too large and is lost in the accelerating tube. On the wall of the insulator or on the accelerating electrode, a large number of secondary electrons are generated, thereby destroying the withstand voltage level of the accelerating tube and limiting the acceleration of the accelerated beam current intensity of the accelerating tube

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