A charged particle beam diagnostic device and diagnostic measurement method

Abstract

The invention discloses a charged particle beam diagnosis device and a diagnosis measurement method. Through organic combination of a Faraday cylinder, a grid electrode and an MCP detection system, diagnosis of large-dynamic-range charged particle beam source parameters is realized, and simultaneous measurement of energy spectrum, absolute flow, collimation and uniformity of charged particles is also realized; through the design of three layers of parallel grids, energy of the charged particles can be selected by changing the voltage of the intermediate grid, the grids at the two ends are grounded to enable a uniform acceleration and deceleration electric field to be formed between the grids, and since the grids at the two ends can realize effective shielding for the changing electric field, magnetic characteristics of other devices are not influenced; and through design of small holes in the inner cylinder bottom portion of Faraday cylinder, measurement influence on absolute beam intensity is very small, beam intensity is greatly reduced, and counting measurement carried out by a follow-up MCP detection system for the charged particles can be realized conveniently.

Description

Technical field [0001] The invention belongs to the technical field of aerospace and precision optoelectronics, and specifically relates to a charged particle beam diagnosis device and a diagnostic measurement method suitable for space charged particle environment simulation and diagnosis of various charged particle beam sources. Background technique [0002] In the X-ray photon measurement for the purpose of space positioning, the measurement and counting of X-ray photons radiated by a certain pulsar, in addition to the photon count from the pulsar source, also includes radiation in all directions in the detector's field of view The additional count of entering the field of view. This additional count of non-pulsar sources from space is called background noise. In the process of pulsar navigation, the space charged particles in the background noise will also be mixed in the pulsar radiation X-ray signal, which will interfere with the photon count received by the pulsar navigatio...

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Problems solved by technology

[0003] Commonly used charged particle testing devices include Faraday cups, MCP detectors, steric energy analyzers, etc.: Faraday cups can provide the flow rate of charged particles by detecting the current of the collector, which is suitable for the diagnosis of charged particle beams with large flows, and cannot detect charged particles. The energy spectrum, uniformity, and collimation of the beam can be measured; the MCP detector can provide the uniformity of the charged particle beam through the fluorescent screen or the position-sensitive anode, which is suitable for the diagnosis of the weak charged particle beam, but it cannot measure the absolute value of the charged particle beam. The flow and energy spectrum are measured; the steric energy analyzer combined with the MCP detector can analyze the energy spectrum of the charged particle beam, but it cannot give the absolute current intensity of the charged particle beam

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