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X-ray and charged particle detector based on graphene electric field effect and detection method thereof

A technology of charged particles and X-rays, applied in the field of radiation detection, can solve problems that have not yet been seen, and achieve the effects of good performance, high energy resolution and time resolution, and improved response speed.

Inactive Publication Date: 2014-09-24
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there are no reports on the use of graphene materials and their electric field effects in X-ray and charged particle detection.

Method used

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  • X-ray and charged particle detector based on graphene electric field effect and detection method thereof
  • X-ray and charged particle detector based on graphene electric field effect and detection method thereof
  • X-ray and charged particle detector based on graphene electric field effect and detection method thereof

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Embodiment

[0040] The structure of the detector is: the substrate 1 is used as an absorber of X-rays or charged particles of the detector, the lower surface of the substrate 1 is plated with a gate electrode 2; the upper surface of the substrate 1 is an insulating buffer layer 3, and the insulating The buffer layer 3 covers the substrate 1; the substrate 1 has a source electrode 4 and a drain electrode 5; the source electrode 4 and the drain electrode 5 have the same shape, both are strip-shaped cuboids, symmetrically distributed on both sides of the substrate 1 and insulated The lower surface of the buffer layer 3 is closely attached; the detection layer 6 is close to the upper surface of the insulating buffer layer 3, and is located in the middle of the insulating buffer layer 3; the voltage measurement electrode 7 and the constant current supply electrode 8 are strip electrodes, The voltage measurement electrode 7 and the constant current supply electrode 8 are fixed on the upper surfa...

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Abstract

The invention provides an X-ray and charged particle detector based on graphene electric field effect and a detection method thereof, belongs to the technical field of radiation detection and relates to a novel X-ray and charged particle detector structure. The X-ray and charged particle detector based on graphene electric field effect comprises a semiconductor substrate, a gate electrode, an insulating buffer layer, a source electrode, a drain electrode, a graphene detection layer, a graphene voltage measuring electrode and a constant-current supply electrode. The detector has relatively high energy resolution and time resolution simultaneously, and is applicable to the application fields of X-ray pulsar navigation and traditional radiation detectors and is used for detecting X-rays and charged particles such as alpha rays and beta rays.

Description

technical field [0001] The invention belongs to the technical field of radiation detection, and relates to a graphene electric field effect-based X-ray and charged particle detector and a detection method for X-rays and charged particles. Background technique [0002] X-ray pulsar navigation provides a feasible way for long-term high-precision autonomous navigation of spacecraft. Pulsar navigation detectors are required to have the characteristics of high energy resolution, high time resolution, large area, light weight, small size, certain imaging capabilities, and no need for cryogenic refrigeration. However, there is currently no X-ray detector that can To meet the above requirements at the same time, it is necessary to explore a new X-ray detection method to promote the engineering application of pulsar navigation. [0003] In 2004, Novoselov and Geim et al. used the method of mechanical exfoliation to prepare single-layer graphene, which proved that two-dimensional mat...

Claims

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Application Information

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IPC IPC(8): G01T1/26
Inventor 吴耀军帅平贝晓敏张倩
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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