Clamping device for gas inflation type discharge capillary

Abstract

The invention discloses a clamping device for a gas inflation type discharge capillary. The clamping device comprises a support base, a support frame, a copper electrode, a clamping sleeve, a seal ring, an extrusion pipe sleeve, a seal pipe sleeve, a threaded steel sleeve, a wire, a rubber pad and screws. The clamping device has the characteristics of simple and compact structure, convenience in operation, good clamping stability, stable gas inflation and discharge, and excellent airtightness, the clamping device can be used repeatedly, and the capillary is changed conveniently. The clamping device is applied to the field of interaction of laser plasma on the basis of the gas inflation type discharge capillary, and particularly applied to acceleration of electrons in a laser wake-field.

Description

technical field [0001] The invention relates to a clamping device for an inflatable discharge capillary, which can be used in the field of laser plasma interaction, especially for accelerating electrons in a laser wake field. Background technique [0002] With the further increase of laser power, the development of electrons accelerated by the laser wakefield is getting faster and faster, and the energy requirements of electrons are getting higher and higher. For an acceleration gradient of 100Gev / m, if you want to accelerate to 10Gev energy, you need an acceleration length of at least 10cm. If you want the laser to maintain a high acceleration gradient over such a long distance, the laser needs to be well guided, and The gas in the capillary is discharged so that the density has a distribution of high on both sides and low in the middle in the radial direction, so that the laser can be well guided in the capillary. Therefore, the gas-filled discharge capillary becomes a go...

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Problems solved by technology

[0003] At present, the gas-filled part of the gas-filled discharge capillary is formed by directly punching holes on the side of the capillary [see Document 1: C.Ciocarlan, S.M.Wiggins, et al. The role of the gas / plasma plume and self-focusing in a gas- filled capillary discharge waveguide for high-powerlaser-plasma applications.Physics of Plasmas 20,093108(2013).], but this side perforated capillary device is only suitable for some materials with good ductility, such as plexiglass, while ductility Good materials are used for discharge, their service life is relatively short, and the discharge is not very stable

If you use a material with high hardness, such as quartz glass, to make a capillary tube, although the service life is long and the discharge is stable, it will take a long time to complete the project on the side of this high-hardness capillary tube, and it will be punched out. It is difficult to make the hole thin and straight with smooth inner wall

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