Flat plate real time imaging gas detector based on FET switch array

A gas detector and real-time imaging technology, which is applied in the field of radiation imaging, can solve the problems of high price and limited imaging area, and achieve the effects of ensuring spatial resolution, reducing costs, and reducing the number of readout electronics

Inactive Publication Date: 2009-01-21
TSINGHUA UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, commercial flat-panel imaging detectors use solid detection media, such as scintillation crystals or semiconductors, which are expensive, and the imaging area is also limited to a certain extent.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flat plate real time imaging gas detector based on FET switch array
  • Flat plate real time imaging gas detector based on FET switch array
  • Flat plate real time imaging gas detector based on FET switch array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention is illustrated below in conjunction with accompanying drawing.

[0014] See attached figure 1 , figure 1 It is a structural representation of the present invention. Among them, 1-closed air chamber, 2-drift electrode, 3-GEM film, 4-readout PCB board, 5-readout electrode pad array, 12-FET array, 6-high voltage input, 7-high voltage divider resistor string , 8-data acquisition system (DAQ), 9-data processing and display computer (PC). A flat-panel real-time imaging gas detector based on FET array, including the following components: airtight gas chamber (1), drift electrode (2), 2-3 layers of GEM film (3), readout PCB board (4), readout Electrode pad array (5), FET array (12), high voltage input (6) and high voltage voltage dividing resistor string (7), data acquisition system DAQ (8), data processing and display computer PC (9). Wherein the airtight chamber (1) is an airtight chamber filled with working gas. The working gas is mainly inert ga...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a flat-plate real-time image-forming gas detector based on FET switch array, which belongs to the radiation imaging field. The detector comprises a closed air chamber (1), a drift electrode (2), a GEM film (3), a FET switch array (12), a data-acquisition system (8) and the like, wherein the drift electrode (2) and the GEM film (3) are both arranged in the closed air chamber (1), negative high pressure is applied on the upper surfaces and the lower surfaces of the drift electrode (2) and the GEM film (3) through a high-pressure divider resistance string (7) in turn, and the electric potential difference between the upper surface and the lower surface of a single-layer GEM film is 300-400v. Rays are ionized by a drift region, electrons which are generated are magnified through GEM avalanche and are gathered by a readout electrode pad array (5), and the FET array (12) is controlled to select and sequentially read out to the data-acquisition system (8), and is transmitted to a data processing and displaying computer (9). The flat-plate real-time image-forming gas detector utilizes the FET switch array to achieve real-time image, which greatly reduces the number of electronic channels which are needed, and lowers the production cost.

Description

technical field [0001] The invention relates to a flat panel real-time imaging gas detector based on an FET switch array, which belongs to the field of radiation imaging. Background technique [0002] Flat-panel imaging detectors have been widely used in medical imaging, industrial non-destructive testing, and security inspection due to their large sensitive area, fast imaging speed, real-time imaging requirements, and ease of use. However, at present, commercial flat-panel imaging detectors use solid detection media, such as scintillation crystals or semiconductors, which are expensive, and the imaging area is also limited to a certain extent. [0003] The emergence of micro-unit structure gas detectors (MPGD, Micro Pattern Gas Detector) represented by GEM (Gas Electron Multiplier, gas electron multiplier) provides the possibility to develop flat-panel imaging devices based on gas detectors. The maximum unit scale of these micro-unit structure gas detectors is about 100 μm...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01T1/16
Inventor 李玉兰郑晓翠李元景程建平
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap