Large dynamic Thomson ion spectrometer

Abstract

The invention discloses a large dynamic Thomson ion spectrometer. The large dynamic Thomson ion spectrometer comprises a collimator, a magnetic field generation device, an electric field occurrence device, an imaging plate and an insulating ring, wherein the magnetic field generation device is used for generating an electric field to make ions move circumferentially; a first ion channel is formedinside the magnetic field generation device, one end of the first ion channel is connected with the collimator, and the other end of the first ion channel is connected with the insulating ring; a second ion channel is formed inside the electric field occurrence channel, one end of the second ion channel is connected with the insulting ring, and the other end of the second ion channel is opposite to the imaging plate. Through the insulating ring, a magnetic field part and an electric field part are separated, on one hand, an electrode plate is machined more easily, and high-voltage risks are reduced, on the other hand, low-energy-end ions only need electric-field-direction offset by a short distance to be prevented from hitting the electrode plate, in this way, a low-energy-end diagnosis threshold value is increased, and the Thomson ion spectrometer has a larger dynamic range of energy spectrum diagnosis.

Description

technical field [0001] The invention relates to the fields of plasma physics and nuclear detection, in particular to a large dynamic Thomson ion spectrometer. Background technique [0002] In the research of high-field laser plasma physics and inertial confinement fusion, the ion species and energy spectrum generated by the interaction between the laser and the target are a key parameter related to the physical process of the experiment. The equipment traditionally used for ion species and energy spectrum diagnosis is Thomson ion spectrometer. The direction of the electric field is parallel to the direction of the magnetic field. It is assumed that the ion incident direction is the Z direction, the magnetic field direction is the X direction, and the vertical magnetic field direction and the ion incident direction are the Y direction. The incident ions enter the Thomson spectrometer through the collimated through hole, and are accelerated by the electric field in the X dir...

AI Technical Summary

Problems solved by technology

To obtain a stronger magnetic field, it is necessary to increase the thickness of the yoke and reduce the air gap, resulting in an increase in the volume of the magnet, and the effective magnetic field space will be smaller

Patent CN206362939U discloses a Thomson spectrometer based on a halbach dipole magnet, which can be compact in size and high in energy spectrum resolution, but the energy threshold for diagnosis is high (>4MeV), and there is a certain risk in high voltage, and the aiming and detection Not easy to install and use

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