A magnetic field modulated multi-target x-ray source for space x-ray communication

Abstract

A magnetic field modulated multi-target X-ray source for spatial X-ray communication comprises a cathode structure, a focusing groove, an electron emission source, a glass shell, a Kovar alloy ring, afocusing electrode, a modulation electromagnetic device, a multi-target metal anode, and a transmission window. The cathode is connected with a negative high voltage, the electron emission source isdisposed in the focusing groove, the glass shell and the focusing electrode are in tight coupling by the Kovar alloy ring, the modulation electromagnetic device is disposed near the multi-target metalanode, the multi-target metal anode is grounded, and one side is facing a focus channel and the other side is plated on the transmission window layer. The magnetic field modulated multi-target X-raysource utilizes a fast-responding high-frequency modulation magnetic field, changes the electron motion trajectory to bombard the multi-target metal anode, excites characteristic X-rays of different energies, and uses characteristic X-rays of different energies as signal transmission carriers to solve the problem that the existing intensity modulation X-ray source technology is less in loading symbol signal and low in communication rate. The magnetic field modulated multi-target X-ray source has the advantages of multiple types of loading symbol signals and large communication rate.

Description

technical field [0001] The invention belongs to the technical field of space communication, and in particular relates to a magnetic field modulation multi-target X-ray source for space X-ray communication. Background technique [0002] X-ray communication is a communication method that uses X-ray photons as carrier signals to transmit information. The energy of X-ray photons is greater than 10 keV (λ<0.1nm), and when the atmospheric pressure is lower than Pa, the transmittance of X-rays is 100%. It is an ideal transmission method. It originated from Dr. Keith Gendreau in the United States. He loaded the communication signal on the ultraviolet LED, and the modulated ultraviolet light generated hit a photocathode, and electrons were generated through the photoelectric effect. The emitted electrons were amplified by an electron multiplier and then bombarded the anode target. Generate X-ray signals. The receiving end uses a Si-PIN photodiode to convert the modulated X-rays ...

AI Technical Summary

Problems solved by technology

[0003] In summary, it can be seen that the above-mentioned modulated X-ray sources all use the generation / non-generation of X-rays as the digital signal carrier mode, and the number of loaded symbols is limited to "0" and "1", which is largely limited by the X-ray source power

Images