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High-energy electron beam magnetic field diagnosis instrument

A high-energy electron beam and electron beam technology, applied in the field of plasma, can solve the problems of no longer measuring signals and low measurement efficiency

Active Publication Date: 2013-08-07
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0008] However, the measurement efficiency of these schemes is relatively low, because only one position of the magnetic field signal can be measured each time, and this position is the area where the probe light incident on the side and the electron beam just overlap. After the two overlap, there will be a gap between them no longer intersect, so signals from other locations can no longer be measured

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0034] see first figure 2 , figure 2 It is a structural schematic diagram of an embodiment of the high-energy electron beam magnetic field diagnostic instrument of the present invention. As can be seen from the figure, the structure of the high-energy electron beam magnetic field diagnostic instrument of this embodiment includes a synchronization device 1, a femtosecond laser 2 and a rectangular vacuum stainless steel cavity 7, and the synchronization device 1 synchronously controls the femtosecond laser 2 and the waiting Measuring the electron source, the first flange 10 and the second flange 11 are respectively installed on the two sides of the vacuum stainless steel cavity 7 facing the incident direction of the electron beam to be measured output by the electron sourc...

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Abstract

The invention relates to a high-energy electron beam magnetic field diagnosis instrument for measuring a high-energy electron beam associated magnetic field in plasmas. The diagnosis instrument comprises a synchronizing device, a femtosecond laser device and a rectangular vacuum stainless steel cavity. A high-performance glass thin sheet with appropriate thickness is simply and vertically inserted in a detection light path, the detection light penetrating through the glass thin sheet is subjected to the light path delay, and the multiple-time point measurement is carried out on the electron beam magnetic field in the plasmas under the single condition. The diagnosis instrument has the advantages that the measuring efficiency is high, the operation is simple, the convenience is realized, the efficiency is high, and the application range is wide.

Description

technical field [0001] The invention relates to plasma, in particular to a high-energy electron beam magnetic field diagnostic instrument for measuring the magnetic field associated with high-energy electron beams in the plasma. Background technique [0002] The Faraday effect refers to the effect that the polarization direction will be deflected to a certain extent after polarized light passes through a magnetic field perpendicular to the polarization direction in a certain medium. This effect is mostly used in the diagnosis of a strong magnetic field inside the plasma. In 2010, M.C.Kaluza et al. first applied this effect to the diagnosis of the magnetic field generated by the electron beam accelerated from the laser wake field (see Kaluza, M.C., et al. ,Measurement of Magnetic-field structures in a Laser-wakefield Accelerator.Physical Review Letters,2010.105(11):p.115002-115002.), for high-energy electron beams, the equivalent high-intensity current will flow around the el...

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Application Information

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IPC IPC(8): G01R33/032
Inventor 李文涛刘建胜王成王文涛田野陈强张志钧
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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