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Traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube

A deflector and magnetic focusing technology, which is applied in the direction of image conversion/image amplification tube, screen tube, discharge tube, etc., can solve the problems of spatial resolution performance and dynamic range being less involved, and achieve the improvement of spatial resolution ability and physical time dispersion. Effect of suppression, time resolution performance improvement

Inactive Publication Date: 2013-04-10
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, although this kind of femtosecond fringe image transformation tube has achieved a relatively high time resolution of hundreds of femtoseconds, its spatial resolution performance and dynamic range are rarely discussed.

Method used

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  • Traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube
  • Traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube
  • Traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube

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Experimental program
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Embodiment

[0036]Embodiment: the potential of the photocathode 3 is -15kV; the anode 4 is set to 0 potential; the distance between the cathode and the anode is 2mm; the outer dimension of the traveling wave deflector is 40×20mm; The inner diameter of the magnetic pole piece at the entrance is 7.5mm, and the inner diameter of the magnetic pole piece at the exit is 15mm. According to these parameters, on the basis of Monte-Carlo sampling of photoelectron emission and electronic tracking calculation, it can be obtained that the optimal image plane distance of the system is 265mm from the photocathode, and the time resolution capability of the femtosecond scanning image converter of the system is as follows: Figure 4 As shown, it can be known that its physical time resolution

[0037] τ phys = 250fs.

[0038] In terms of technical time resolution estimation, it is assumed that the deflection sensitivity of the traveling wave deflector 5 is P=45mm / kV, the dynamic spatial resolution δ=10lp / ...

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Abstract

The invention relates to a traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube which comprises a tube shell, a cathode disc, a photocathode, an anode, a traveling wave deflector, a short magnetic focusing lens and a fluorescent screen, wherein the cathode disc, the photocathode, the anode, the traveling wave deflector, the short magnetic focusing lens and the fluorescent screen are sequentially arranged in the tube shell along the electronic transmission direction. The photocathode is arranged on the cathode disc. The traveling wave deflector comprises a pair of S-shaped belts which are vertically and mutually arranged parallel to each other. The short magnetic focusing lens comprises a magnetic pole shoe, a galvanical solenoid and a magnetic pole shoe slit, wherein the galvanical solenoid is wrapped inside the magnetic pole shoe and the magnetic pole shoe slit is close to the inlet portion of the short magnetic focusing lens. The traveling wave deflector preposition short magnetic focusing femtosecond stripe image converter tube has the advantages of being conducive to improving temporal resolution, spatial resolution and dynamic range of the image converter tube, and capable of simultaneously reducing difficulty of magnetic lens design, shortening the axial length of the system under the premise of keeping focusing effect and providing possibility for miniaturization of the stripe image converter tube.

Description

technical field [0001] The invention relates to an ultrafast diagnostic technology device, in particular to a femtosecond fringe image change tube. Background technique [0002] The striped image converter is an ultrafast diagnostic device that realizes photoelectric conversion of ultrafast transient light signals, focusing imaging, scanning deflection, and image enhancement and processing. Due to its extremely fast recording speed (theoretical limit time resolution is as high as 10fs, 1fs=10 -15 s), coupled with its ability to enhance light and detect signals in different bands from infrared to ultraviolet, X-ray, etc., it has now become a 10 -8 ~10 -13 The main tool in the research field of ultrafast time-resolved diagnostics in the s range. Its main performance parameters are temporal resolution, spatial resolution and dynamic range. Due to the diversity of application fields and different needs, the current stripe image transformation tube also clearly presents a dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J31/50H01J29/70H01J29/64H01J29/02H01J29/04
Inventor 田进寿赵卫王超李昊徐向晏曹希斌卢裕王俊锋白永林
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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