Measuring system for nA/pA electronic beam current of impulse electron accelerator

Abstract

The invention relates to a pulse electronic accelerator nano-pico ampere electron beam flow measuring system, relating to an electronic accelerator pulse electron beam flow measuring system, in particular to the nano-pico (10-10A / cm2) micro beam flow measurement of millisecond pulse, belonging to the electron radiation environment ground simulation and test field. The pulse electronic accelerator nano-pico ampere electron beam flow measuring system is composed of a novel inclined-bottom faraday cup, three coaxial cables and a nano-pico level current amplifier. The measurement result can be obtained by oscilloscope or data acquisition card. The inclined-bottom faraday cup electron collection system resolves the collection efficiency problem of high energy electrons (MeV), to improve collection efficiency. The adopted three coaxial cables can reduce the interference of electromagnetic field. The nano-pico ampere level current amplifier resolves the stable current linear amplification problem under electron radiation, and converts weak current signals to voltage signals, thus being convenient for data acquisition of oscilloscope or data acquisition card. The invention resolves the measurement problem of nano-pico ampere pulse electron beam flow, to confirm the accuracy, real-time property and easy use of measurement.

Description

technical field [0001] The invention relates to an electron accelerator pulsed electron beam current measurement system, the key relates to the millisecond pulsed Napier (10 -12 ~10 -9 A / cm 2 ) microbeam current measurement, which belongs to the field of ground simulation and testing of electron radiation environment. Background technique [0002] The electrification of the deep layer of the medium caused by high-energy electrons in space poses a serious threat to the safety and reliability of geosynchronous orbits, polar orbit vehicles, and various deep space exploration vehicles. Carrying out relevant ground simulations and evaluations is the key to the radiation protection of spacecraft. the part that can not be lost. At present, the beam density of electron accelerators used in industry and scientific research is in the range of μA / cm 2 It is generally believed that the current density of the charged high-energy electron beam in the space-induced satellite is at pA / c...

AI Technical Summary

Problems solved by technology

Its oblique bottom Faraday cup electron collection system solves the collection efficiency problem of high-energy electrons (MeV) and improves the collection efficiency; the use of triaxial cables effectively reduces electromagnetic field interference; the nappean-level current amplifier solves the problem of stable electrons under electron irradiation conditions. The current linear amplification problem, the weak current signal is converted into a voltage signal, which is convenient for oscilloscope or data acquisition card to obtain data

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