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.
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[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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