FXT focusing camera refrigeration link structure for Einstein probe satellite

Abstract

The invention discloses an FXT focusing camera refrigeration link structure for an Einstein probe satellite, which comprises a detector machine box and a thermal control structure, and is characterized in that the detector machine box comprises a shielding box and a focal plane detector box, the focal plane detector box is arranged in the shielding box, and the focal plane detector box and the shielding box are mounted in a heat insulation manner; a focal plane detector is arranged in the focal plane detector box, and a flexible plate of the focal plane detector extends out of the front end of the shielding box and is connected with the detector case; the shielding box comprises a shielding box upper cover and a shielding box bottom cover, a left plug and a right plug are arranged on the left side and the right side of the shielding box respectively, the shielding box upper cover is sequentially provided with a front plug, a rear plug and a light limiting valve, the rear plug is fixedly connected with the light limiting valve, a regenerator sealing sleeve is arranged on the side face of the left plug, and a regenerator pipe is arranged in the regenerator sealing sleeve. And a nitrogen pipeline joint is arranged on one side of the right plug. Heat conduction heat leakage and radiation heat leakage of the focal plane detector box and the shielding box are reduced to the maximum extent, the instrument background is effectively reduced, and irradiation damage of the detector is reduced.

Description

technical field [0001] The invention belongs to the technical field of space astronomical observation, and in particular relates to a cooling link structure of an FXT focusing camera used for an Einstein probe satellite. Background technique [0002] The Einstein Probe (EP) is an astronomical exploration satellite for future time-domain astronomy and high-energy astrophysics. The payload of the EP satellite includes a large field of view soft X-ray monitor and an X-ray telescope (FXT). The FXT telescope is used to conduct deep follow-up observations on the transient sources discovered by the monitor at the first time, and to conduct observations on the targets of opportunity discovered by other equipment. In order to realize the observation of the target X-ray source, the FXT telescope adopts the configuration of the traditional nested grazing incidence focusing telescope, and then uses the PNCCD as the focal plane detector to read out the X-ray photons. Due to the working ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a cooling link structure for the FXT focusing camera of the Einstein probe satellite to solve the problem of the lower end of the existing FXT focusing camera The cooling effect of the advanced cooling components on the detector is not ideal, it is difficult to ensure the working temperature of the FXT detector, which affects the readout speed of the detector

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