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Long-life electron injector for free electron laser (FEL) or synchronous radiation source (SRLS)

A technology of electron injection and laser, which is applied in the direction of laser, phonon exciter, laser parts, etc., can solve the problems of short service life of photocathode and complex structure of electron injector, and achieve the effect of prolonging service life

Inactive Publication Date: 2018-05-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0004] The invention provides an electron injector with simple structure, convenient operation, long service life and online replacement of photocathode, so as to solve the defects of complex structure and short service life of photocathode in existing electron injectors

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  • Long-life electron injector for free electron laser (FEL) or synchronous radiation source (SRLS)
  • Long-life electron injector for free electron laser (FEL) or synchronous radiation source (SRLS)
  • Long-life electron injector for free electron laser (FEL) or synchronous radiation source (SRLS)

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. The electron injectors mentioned in the present invention are mainly used in free electron lasers (FEL) and synchrotron radiation sources (SRLS), but are not limited to the above two types of products.

[0025] see figure 1 , and combined with Figure 4 As shown, an electron injector of the present invention includes a vacuum chamber 10 , an electron generator, and an electron accelerator 30 installed in the vacuum chamber 10 . The vacuum chamber 10 is provided with an electron beam exit 11 . Wherein, the electron generator includes a laser 21 and a photocathode assembly installed in the vacuum cavity 10 . The photocathode assembly includes a photocathode disk 22 . The p...

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Abstract

The invention provides an electron injector for an FEL or SRLS. The electron injector comprises a vacuum cavity, an electron generator and an electron accelerator installed in the vacuum cavity, and the vacuum cavity is provided with an electron beam exit port. The electron generator comprises a laser and a photocathode disk installed in the vacuum cavity, and the photocathode disk is provided with sub photocathodes. The photocathode disk is installed in the vacuum cavity via a support device, and laser beams emitted by the laser can be focused on the different sub photocathodes. The electroninjector for the FEL or SRLS is simple in structure, convenient to operate, long in service life and capable of replacing the photocathodes online, and the defects that a present injector for the FELor SRLS is complex in structure and the service life of photocathodes is short are overcome.

Description

technical field [0001] The present invention relates to the technical field of free electron laser (FEL) or synchrotron radiation source (SRLS), and more particularly, relates to an electron injector for FEL or SRLS and a method for improving its service life. Background technique [0002] At present, free electron lasers and synchrotron radiation sources have been widely used in material science, photochemistry and life science due to their advantages such as ultra-wide spectral range, extremely wide and fine tuning ability. The photocathode is one of the key components of the FEL or SRLS system, and the quality of the photocathode directly affects the quality of the light source. However, due to the thermal damage caused by laser radiation and the bombardment of positive ions in the vacuum cavity, the high-quality and high-efficiency semiconductor photocathode has a service life of only a few to tens of hours, making it difficult to work for a long time. Therefore, how to...

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Application Information

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IPC IPC(8): H01S3/09H05H7/08
CPCH01S3/0903H05H7/08H05H2007/084
Inventor 王志敏刘旭超杨晶彭钦军许祖彦
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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