Vacuum dynamic sealing mechanism for soft X-ray collimation and flux adjustment

Abstract

The invention discloses a vacuum dynamic sealing mechanism for soft X-ray collimation and flux regulation. The mechanism comprises a vacuum system, a beryllium window regulator and a pinhole regulator, two sides of the beryllium window regulator are respectively connected with the vacuum system and the pinhole regulator, and through the vacuum system, the beryllium window regulator and the pinholeregulator, an integrated structure of soft X-ray collimation and flux adjustment is realized. The mechanism has the advantages that a vacuum pipeline, a pinhole adjuster and a beryllium window adjuster are adopted, the problems of air absorption, collimation, flux adjustment and the like which are often met in soft X-ray measurement are effectively solved at the same time, and the mechanism is quite suitable for a magnetic confinement nuclear fusion device.

Description

technical field [0001] The invention belongs to a nuclear measurement device, in particular to a vacuum dynamic sealing mechanism for soft X-ray collimation and flux adjustment, and is especially suitable for a soft X-ray diagnosis system of a magnetic confinement nuclear fusion device. Background technique [0002] During the operation of the magnetic confinement nuclear fusion device, electrons in the plasma will produce bremsstrahlung due to Coulomb collisions, and a large amount of soft X-rays will be emitted. By measuring soft X-rays, a wealth of plasma information can be obtained, such as: electron temperature, electron velocity distribution, impurities in the plasma, etc. Therefore, the soft X-ray measurement system is one of the most important routine diagnostics for magnetic confinement fusion devices. [0003] The soft X-ray measurement system of the magnetic confinement nuclear fusion device uses a semiconductor detector. The basic principle of the measurement is...

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Problems solved by technology

Soft X-ray measurement often encounters the following problems: (1) Air absorption, due to the low energy of soft X-rays, its penetrating ability is poor. Attenuation of 10%, soft X-ray measurement must be carried out in a vacuum environment; (2) Soft X-ray collimation, the accuracy of soft X-ray collimation determines the position information accuracy of soft X-ray measurement results; (3) Soft X-ray The ray flux and soft X-ray energy spectrum measurement must ensure that there are enough pulse counts, but they must not exceed the maximum count rate of the detector. If the pulse count is too low, it will lead to large statistical errors and poor time resolution of the measurement results. If the pulse count is too high, it will cause Pulse accumulation leads to large errors in measurement results, or even complete distortion

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