Medium-energy-section compact electron beam ion trap high-charge-state ion spectrum device

Abstract

The invention discloses a medium-energy-section compact electron beam ion trap high-charge-state ion spectrum device which comprises a superconducting coil, an electron emitter, a drift tube, an electron collector, a gas injection system, a vacuum system, a low-temperature system, a high-voltage power supply system, a control display system, a protection system, a cooling system and a spectrograph. The electron generator emits electron beams, the electron beams collide with atoms from the gas injection system or ions in a low charge state in the drift tube to generate energy level transition,linear spectral radiation is generated, and a spectral system can perform spectral measurement through a pipeline connected to a center of the drift tube. The superconducting coil cooled by the low-temperature system is used for compressing a beam diameter of the electron beam, improving electron density and accelerating an ionization speed. The vacuum system is used for maintaining ultrahigh vacuum of an ion trap region and a vacuum environment required by a magnet and the spectrograph. An electron beam energy design of the device can reach 30keV, and spectral research of high-charge-state ions with transition energy below 30keV can be performed.

Description

technical field [0001] The invention relates to the field of high-energy physical equipment, in particular to a high-charge state ion spectrum device of a compact electron beam ion trap in the middle energy range. Background technique [0002] Electron Beam Ion Trap (EBIT) is a unique instrument, which can carry out high-charge state ion spectrum experiments by changing the electron beam energy. As a high-charge state ion observation device, it has many advantages. First, it can establish a narrower Most of the ions are in the same ionization state; secondly, in a good ultra-high vacuum environment, there is only one main element in the ion trap area; more importantly, its electron energy distribution is very narrow and can be finely adjusted energies for fine-level excitation, whereas in thermal plasmas, a large number of processes occur simultaneously, making it difficult to study a single effect; finally, the ion temperature in the electron beam ion trap EBIT is lower, wh...

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Problems solved by technology

Although the energy of the high-energy EBIT electron beam can reach higher and can study ions with higher charge states, its operating cost is expensive, while the electron beam energy of the medium and low-energy EBIT is moderate, and the energy adjustment is more flexible

At present, there are two low-energy EBIT magnets in Fudan University in China, which can only reach a maximum of 5keV, and the domestic medium-energy EBIT is still vacant. It is a high-temperature superconducting magnet. The disadvantage of a permanent magnet is that the magnetic field strength cannot be adjusted. The disadvantage of a high-temperature superconducting magnet is that it is difficult to achieve a magnetic field strength of 1T under limited size conditions.

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