Electromagnetic shielding and long-distance driver system for pulse radiation environment

Abstract

The invention provides an electromagnetic shielding and long-distance driver system for a pulse radiation environment. The electromagnetic shielding and long-distance driver system comprises two layers of shielding shells, wherein a shell body of the inner shielding shell is provided with multiple input end and output end standard cable connectors; a shell body of the outer shielding shell is provided with lead wire holes corresponding to the input end and output end standard cable connectors; the electromagnetic shielding and long-distance driver system further comprises a current amplification circuit and an impedance matching circuit which are located in the inner shielding shell; the input ends of the current amplification circuit are welded to the input end standard cable connectors; the output ends of the impedance matching circuit are welded to the output end standard cable connectors; signal input cables are connected with the input end standard cable connectors through the lead wire holes; signal output cables are connected with the output end standard cable connectors through the lead wire holes; the inner shielding shell is connected with a ground wire at the test end. By outer-layer shielding, electromagnetic pulse coupling current is eliminated; by inner-layer shielding, ground potential shaking is eliminated, and a stable reference ground potential is supplied; furthermore, the problem of serious distortion occurring during transmission of a signal to the test end is solved.

Description

technical field [0001] The invention relates to an electromagnetic shielding and long-line driving system, in particular to a weak-signal long-line driving and anti-electromagnetic interference system for the strong pulsed radiation field of an accelerator. Background technique [0002] The strong pulsed radiation field of the accelerator can produce strong electromagnetic radiation and ionizing radiation, so the distance between the signal measurement terminal and the accelerator target surface is required to be far enough to ensure the safety of the person and the measuring instrument. In the long distance, the signal transmission will have a large attenuation, especially for high-frequency signals or digital signals with weak driving ability, coupled with the coupling of strong electromagnetic pulses through cables, it is extremely difficult to accurately collect effective signals. Therefore, the accurate measurement of weak signals in the strong pulsed radiation field of...

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Problems solved by technology

[0004] In order to overcome the problem of severe distortion when the signal is transmitted to the test terminal, the present invention solves this problem by adding the signal to the drive circuit near the input terminal. The method is to input a weak signal to a current amplifier circuit, and the circuit keeps the signal voltage constant. The driving current is amplified to drive a long cable, and then output through an impedance matching circuit, so that long-line driving can be realized with a fidelity signal waveform, and the output impedance matches the characteristic impedance of the cable to eliminate the problem of signal reflection

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