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Gas metastable atom beam generation device adopting fluid cooling

An atomic beam current and generating device technology, which is applied in the field of devices for generating metastable atomic beam currents, can solve the problems of coil material annealing discharge, poor vacuum heat dissipation, and high coil temperature, so as to improve beam collimation and cooling. High efficiency and stable working conditions

Inactive Publication Date: 2016-11-02
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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Problems solved by technology

The present invention aims to solve the problem of unstable or even impossible discharge caused by high coil temperature and coil material annealing mainly due to poor vacuum heat dissipation, and proposes a solution using an effective cooling method

Method used

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  • Gas metastable atom beam generation device adopting fluid cooling
  • Gas metastable atom beam generation device adopting fluid cooling
  • Gas metastable atom beam generation device adopting fluid cooling

Examples

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Embodiment Construction

[0023] figure 1 It is a schematic diagram of the hollow coil structure of the metastable atomic beam generation device. First, fold the copper pipe with an outer diameter of 2mm and an inner diameter of 1mm in half, pay attention to ensure the connectivity of the elbow, and not flatten it, resulting in a decrease in conductance; wind the folded copper pipe into a spiral coil 1 starting from the bend form; connect the remaining parts 2 and 3 of the two ends of the copper tube according to figure 1 In the way shown, bend at an included angle of 90°, and then bend toward the top of the coil, so that the copper tube is kept parallel to the coil, and the distance between 2 and 3 at both ends of the copper tube and the coil is controlled so that it can be connected with the ultra-high vacuum flange 17 The cooling medium joints 18 and 19 on the coil are connected; the radio frequency signal 4 is connected from the first turn of the coil, and the other end is connected to the radio f...

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Abstract

The invention provides a gas metastable atom beam generation device adopting radio frequency gas discharge. The device is composed of a hollow solenoid coil assembly, a brass shielding layer assembly, a flow-limiting gas-guiding tube assembly and an ultra high-vacuum flange interface assembly. According to the gas metastable atom beam generation device of the invention, a variety of cryogenic fluids such as air, water and liquid nitrogen can be adopted to cool a discharge coil, and therefore, the problem of instable work and incapability of working of a radio frequency coil caused by incapability of realizing heat dissipation when gas discharge is carried out in a vacuum environment can be solved; a solenoid coil is arranged in a gas-guiding tube; gas molecules collide with the tube wall of the solenoid coil, so that the temperature of an atom beam can be pre-cooled to a temperature the same as a cooling medium; the velocity of the atom beam can be reduced, the collimation of the beam can be improved, and time when atoms are located in an excitation region is increased, and therefore, the excitation efficiency of metastable atoms can be improved; and the relative position of a discharge system is adjusted through simply increasing or decreasing the number of positioning pad rings, so that needs of different working states can be satisfied.

Description

technical field [0001] The invention relates to a device for generating a metastable atomic beam by using the principle of radio frequency gas discharge, which can be used in research and application fields such as precision spectrum measurement, atomic photolithography, and atomic frequency standard. Background technique [0002] The metastable atomic beam with high intensity and high collimation has important applications in many fields such as atomic lithography, atomic optics, atomic collision, atomic frequency standard, precision spectrum measurement, trace analysis, Bose-Einstein condensate, etc. . Many physical processes and applications can only be achieved with high-intensity beams of atoms. Therefore, how to generate a high-intensity metastable atomic beam has become a very important technical problem. [0003] Usually, direct current or radio frequency gas discharge can be used to excite and generate metastable atomic beams. Compared with the DC discharge metho...

Claims

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Application Information

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IPC IPC(8): H05H3/02
CPCH05H3/02
Inventor 洪延姬冯高平王明东文明
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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