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Short magnetic focusing device and method for transversal compression of ultrafast electronic pulses

An electronic pulse, lateral compression technology, applied in the direction of cathode ray tube/electron beam tube, cathode ray/electron beam tube shell/container, circuit, etc., can solve the problem of high manufacturing cost, difficult coaxial adjustment and poor cooling effect and other problems to achieve the effect of solving the problem of coaxiality, fine-tuning the gap between the pole shoes and improving the working stability.

Active Publication Date: 2017-02-15
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0011] In order to solve the technical problems of poor cooling effect, difficult coaxial adjustment and high manufacturing cost of the existing pulse transverse compression device, the present invention provides a short magnetic focusing device for ultrafast electronic pulse transverse compression

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  • Short magnetic focusing device and method for transversal compression of ultrafast electronic pulses
  • Short magnetic focusing device and method for transversal compression of ultrafast electronic pulses
  • Short magnetic focusing device and method for transversal compression of ultrafast electronic pulses

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Embodiment Construction

[0046] The invention provides a short magnetic focusing device capable of cooling and adjusting the magnetic gap width and coaxiality at the same time. By adjusting the magnetic gap width, excitation current and coaxiality, the transverse focusing of ultrafast electron pulses is realized.

[0047] see figure 1 and figure 2 , the structure of the preferred embodiment of the present invention includes a coaxially arranged tubular bobbin 1 and a tubular inner magnetic shielding shell 2; the two end faces of the bobbin 1 are each provided with an annular baffle 3, and the diameter of the inner circle of the baffle is equal to The diameter of the spool and the outer diameter of the baffle are equal to the diameter of the inner magnetic shielding shell; the inner magnetic shielding shell 2, the spool 1 and the two baffles 3 together form an annular cavity, and a coil wound on the spool is arranged in the cavity 4;

[0048] The short magnetic focusing device also includes two oute...

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Abstract

The present invention belongs to the ultrafast diagnostic technique field and relates to a short magnetic focusing device and method for the transversal compression of ultrafast electronic pulses. The short magnetic focusing device comprises a tubular linear shaft and a tubular inner magnetic shielding shell which are arranged coaxially; the short magnetic focusing device further comprises two outer magnetic shielding shells, wherein the first outer magnetic shielding shell and the second outer magnetic shielding shell are axially buckled to the outer side of the inner magnetic shielding shell along the axial direction of the linear shaft; the center of the first outer magnetic shielding shell is coaxially provided with a first pole shoe extending into the linear shaft; and the center of the second outer magnetic shield shell is coaxially provided with a second pole shoe extending into the linear shaft; a magnetic gap is formed between the first pole shoe and the second pole shoe; and a buckling position of the outer magnetic shielding shells is provided with a magnetic gap adjustment device; the outer end surfaces of the outer magnetic shielding shells are provided with coaxial adjustment devices; and cooling systems are arranged between the inner end surfaces of the outer magnetic shielding shells and corresponding baffles. The short magnetic focusing device and method of the invention have the advantages of effective cooling of coils, fine adjustment of coaxiality, fine adjustment of the gap of the pole shoes, and long-time stable work.

Description

technical field [0001] The invention belongs to the technical field of ultrafast diagnosis, and relates to a short magnetic focusing device and method for transversely compressing ultrafast electron pulses. Background technique [0002] Human beings' understanding of the natural world is getting deeper and deeper into the microscopic world. The most essential processes that reflect the appearance of the material world all occur inside molecules or atoms, and their corresponding time scales are all on the order of picoseconds, femtoseconds or even attoseconds (called ultrafast processes), which can be described as "everything changes". The in-depth understanding of these ultra-fast processes does not require the use of diagnostic tools with ultra-high spatio-temporal resolution to make up for the lack of human eye resolution (1 / 24 second & 0.1 mm). Ultrafast electron diffraction (UED), ultrafast electron crystallography (UEC), ultrafast electron microscopy (UEM) and streak c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/02H01J29/86
CPCH01J29/02H01J29/86
Inventor 田进寿罗端惠丹丹王兴王俊锋温文龙
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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