Device and method for monitoring two-dimensional distribution of charged particle beams

Abstract

The invention relates to a device and method for monitoring two-dimensional distribution of strong current charged particle beams, and the device comprises a collimation plate, a Faraday tube array plate, a measurement plate and a data processing module arranged in order, wherein the Faraday tube array plate is provided with first through holes arranged in an array; the measurement plate is provided with second through holes arranged in an array, and each second through hole of the measurement plate is correspondingly provided with a measurement electrode used to collect signals of the chargedparticle beams, and transmit the signals to the data processing module; the data processing module draws a two-dimensional distribution image of the charged particle beams according to the charged particle signals of the measurement electrodes and the real-time position information of the measurement electrodes; the measurement plate and the Faraday tube array plate are fit closely, and the respective first through holes and second through holes are corresponding to each other one by one and are arranged coaxially; and third through holes coaxial with each first through hole are provided on the collimation plate. The invention can simultaneously monitor the intensity and two-dimensional distribution image of the charged particle beams, and the test result is more comprehensive and can better reflect the situation of the charged particle beams.

Description

technical field [0001] The invention relates to a device and method for monitoring the two-dimensional distribution of charged particle beams, belonging to the field of charged particle beam monitoring. Background technique [0002] The charged particle beam monitoring device is an important part of the charged particle accelerator, which can be used to monitor the current intensity, position, beam profile, energy and other information of the charged particle beam. Among them, the beam profile includes the beam intensity distribution, center of gravity position, size, shape, etc., and is an essential beam parameter in the process of beam extraction, transmission and optimization of charged particle accelerators. Currently commonly used beam profile monitoring devices can be divided into two categories: projection type and non-projection type according to specific measurement methods. The projected beam profile monitoring device measures the one-dimensional current intensity...

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Problems solved by technology

[0003] At present, although the projected beam profile monitoring device can directly obtain the real one-dimensional current intensity distribution of the beam projected in the horizontal and vertical directions by measurement, it needs the two-dimensional beam profile obtained by calculation. The beam profile depends heavily on the reliability and applicability of the calculation algorithm, and the general algorithm contains idealized assumptions about the real situation, so the two-dimensional beam profile obtained according to the calculation does not necessarily reflect the real two-dimensionality of the charged particle beam. beam profile

Although the non-projective beam profile monitoring device can directly measure the two-dimensional profile of the beam, the fluorescent screen monitoring device cannot accurately give the current intensity information of the beam. Fewer Faraday cages are included to truly reflect the true position of the charged particle beam

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