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Electronic diffraction device based on laser plasma wake-field acceleration

A technology of laser plasma and electron diffraction, which is applied in the field of electron diffraction to achieve the effects of saving time, compact equipment, and reducing system noise

Active Publication Date: 2017-01-25
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is currently no ultrafast electron diffraction experimental system with a time resolution of less than 100 femtoseconds

Method used

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  • Electronic diffraction device based on laser plasma wake-field acceleration
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  • Electronic diffraction device based on laser plasma wake-field acceleration

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Embodiment Construction

[0038] The invention will be further described below in conjunction with the accompanying drawings. It should be understood that the embodiments shown in the drawings are not limitations of the present invention, but are only used to illustrate the essence of the technical solution of the present invention.

[0039] The electron diffraction device of the present invention such as figure 1 shown.

[0040] The device includes a laser 1, an optical entrance window 3, a vacuum chamber 2, a gas generating device 6, a first microhole 8, a second microhole 11, a magnetic lens 10, a five-dimensional adjustment system 13, a sample holder 14, a detection system and a vacuum supply system 27;

[0041]A gas generating device 6, a first microhole 8, a second microhole 11, a sample holder 14 and a detection system are sequentially arranged in the vacuum chamber 2 along the direction of the laser pulse;

[0042] Among them, the laser 1 can generate ultrafast laser pulses less than 100 fem...

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Abstract

The invention provides a femtosecond electronic diffraction device based on laser plasma wake-field acceleration, comprising a laser, a gas generator, a micropore, a magnetic lens, a sample rack, a detection system, a vacuum chamber, a vacuum system, a five-dimensional system and the like, wherein the laser is used for generating ultrashort ultra-high laser pulses, the gas generator is used for generating a high-density gas target, the ultrashort ultra-high laser pulses may react with the gas target to generate electron beams, and the electron beams are collimated by the micropore and condensed by the magnetic lens and then act with a sample to generate an electronic diffraction pattern that is collected by the detection system. The device of the invention is up to 10 femtoseconds in time resolution, pumped light and detection electron beams are in good time synchronization in a femtosecond electronic diffraction experiment, there is no need for a photoelectric cathode, a high-pressure electrode or microwave source and other components, and therefore the device is simpler and more compact and is widely applicable to the scientific research of ultrafast dynamic process.

Description

technical field [0001] The invention belongs to the technical field of electron diffraction, in particular to an electron diffraction device based on laser plasma wake field acceleration. Background technique [0002] Ultrafast electron diffraction technology has extremely high spatial (sub-nanometer) and time (sub-picosecond) resolution capabilities. The propagation of molecules, the formation and breaking of chemical bonds, and the structural phase transition of materials have important applications in many fields such as materials, physics, chemistry, and biology. [0003] The working process of ultrafast electron diffraction technology is as follows: a beam of ultrafast laser is divided into two beams, one of which is used as pump light to excite the sample to change the structure of the sample; the other beam is used to bombard the photocathode material of the electron gun Generate photoelectrons, which are accelerated and shaped to form an ultrafast electron beam that...

Claims

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Application Information

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IPC IPC(8): H01J37/295
CPCH01J37/295
Inventor 王兴罗端田进寿
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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