Laser modulation pulse X ray source used for space X ray communication

Abstract

The invention discloses a laser modulation pulse X ray source used for space X ray communication. The laser modulation pulse X ray source includes an optical fiber interface, a cathode pedestal, a laser modulation cathode, a focusing electrode, a degassing device, a vacuum chamber housing and an anode metal target. The laser modulation cathode is composed of a negative cathode affinity photoelectric cathode, a micro-channel plate and a cathode housing. The basic principle is that laser is utilized for exciting the photoelectric cathode for generating photoelectrons; the photoelectrons are amplified through the micro-channel plate; the amplified electrons are subjected to co-effect of anode high voltage and the focusing electrode in the vacuum chamber and generate high speed highly-focused electron beams; the electron beams bombard the anode metal target and finally generate X rays. Since the input laser has characteristics of high repetition frequency and narrow pulse width, through effective signal conversion by the laser modulation pulse X ray source, the X rays also have characteristics of high repetition frequency and narrow pulse width and can perform restoration well on input laser pulse signals. Therefore, modulation on X ray pulse signals by laser pulse signals can be realized.

Description

[0001] Technical field: [0002] The invention relates to a laser-modulated pulsed X-ray source for space X-ray communication, which is a key device for realizing space X-ray communication. The device is also suitable for X-ray detector performance testing and navigation algorithm verification of X-ray pulsar navigation experiment. [0003] Background technique: [0004] X-ray communication - a method of communicating by carrying information in x-rays - is a potentially revolutionary technology that could allow interstellar travelers to transmit data at rates of several gigabits per second at interplanetary distances. Dr. Keith Gendreau, an astrophysicist at NASA's Goddard Space Flight Center, proposed the concept of point-to-point communication between space satellites and aircraft using X-rays in 2007, and proved the feasibility of X-ray communication for the first time. sex. Zhao Baosheng's team at the Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Scienc...

AI Technical Summary

Problems solved by technology

In such a communication mode, the communication rate is largely limited by the pulse emission rate of the X-ray source, and the existing pulsed X-ray sources used for X-ray communication have problems of insufficient power and low pulse emission rate, which greatly reduces the Limits the rate of X-ray communication

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