Lattice-structured electron drift tube

Abstract

The invention discloses a lattice-structured electron drift tube. The lattice cathode of the electron drift tube converts X-rays radiated by a target into electron pulse strings distributed in a spatial array, the electron pulse strings drift at a high speed under the action of a gradual change electric field with non-interfering spatial arrays, and the spatial scale of the electron pulse stringsin the drift is fully guaranteed. The electron pulse strings pass through a rear-end grid mesh distributed in an equal-ratio space array, is multiplied by a microchannel plate and then bombards a fluorescent screen to emit light, and the electric signal is converted into an optical signal again, and the electron pulse strings are in a uniform magnetic field generated by a magnetic coil with a shielding shell in the whole process. The electron drift tube can obviously improve the spatial resolution characteristic in an electron uniform-speed drift region, furthest reduce the spatial transversecrosstalk of the electron pulse strings by utilizing the magnetic field constraint, achieve spatial fidelity and a large dynamic range, contribute to promoting the development of an ultrahigh time-resolution two-dimensional imaging diagnosis technology, and have important significance for improving the precision level of laser inertial constraint fusion diagnosis.

Description

technical field [0001] The invention belongs to the field of X-ray ultrafast imaging, and in particular relates to a lattice configuration electron drift tube. Background technique [0002] High-speed photography technology has a wide range of applications in the fields of medicine, biomedicine, laser fusion and aerospace. Most professional workers believe that optical recording technology with a time resolution of more than 1000 images per second and a spatial resolution of one to three spatial axes below a millimeter can be called high-speed photography. In fact, in the field of scientific research under extreme conditions, the temporal and spatial resolution requirements for ultrafast imaging devices are much higher than this. [0003] The plasma generated by laser targeting provides ideas for the study of matter interaction under extreme conditions, astrophysics, ultrafast phenomena and new controllable energy sources. The research of laser inertial confinement fusion ...

AI Technical Summary

Problems solved by technology

This is because the space charge effect during the flight of electrons causes time dispersion and large space dispersion. At the same time, due to its shrinkage structure, the magnetic field intensity in the on-axis and off-axis regions of the electron flight tube is unevenly distributed, resulting in the imaging system. The spatial resolution is only 300 μm, which does not meet the needs of ICF experimental diagnosis

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