Beam loss detector device for ion accelerator

Abstract

The invention relates to the technical field of beam loss monitoring of ion accelerators in the technical field of nuclear electronics, and more particularly to a beam loss detector device for an ionaccelerator. The beam loss detector device comprises upstream and downstream beam position probes arranged on a vacuum tube at intervals, wherein the two beam position probes are connected to a clocktrigger through a front-end circuit; the clock trigger is connected with a high-speed sampling digital circuit board via an analog-to-digital conversion circuit; the upstream and downstream beam position probes acquire the synchronization signal of a particle beam and the high-speed sampling digital circuit board generates a digital signal to be processed. When a difference between the signal andits historical data exceeds a certain threshold or a difference between the upstream and downstream signals exceeds a certain threshold, an alarm signal output is generated. The differential beam intensity loss detection system using the beam position probes has a short response time, does not require a compensation circuit, and achieves high measurement accuracy through reasonable design.

Description

Technical field [0001] The present invention relates to the technical field of beam loss monitoring of ion accelerators in the technical field of nuclear electronics, and in particular to a beam loss detector device for ion accelerators. Background technique [0002] Efficient beam loss monitoring plays a vital role in the stable operation of high-current linear accelerators. As an important part of machine protection, there are three main methods for monitoring beam loss in commonly used ion accelerators: Based on gas ionization Room or scintillator photomultiplier tube method, differential beam intensity detection method, and non-intercepting beam damage detection loop. [0003] The gas ionization chamber type beam loss equipment uses the gas sealed inside the instrument and the ionization of various incident particles (γ-rays / protons / heavy particles, etc.) to generate electrical signals to detect beam loss. When the high-energy ion beam passes through the superconducting accele...

AI Technical Summary

Problems solved by technology

This method mainly uses the AC current transformer probe (ACCT) to obtain the beam intensity signal. This probe has the following disadvantages: First, due to the characteristics of the ACCT circuit, the obtained measured value decreases with time. (Drooping), so it is necessary to provide an additional drop compensation circuit

Secondly, because one of the important parts of the ACCT probe is a highly sensitive magnetic sensor, it is often easily damaged because it is installed on the vacuum tube wall of the ion accelerator, and usually it takes a long time to replace and upgrade an ACCT. time even in years

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