Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Adjustable distance liquid nitrogen metal dewar for high temperature super conductive quantum interferometer

A technology of quantum interference and high temperature superconductivity, which is applied in the fields of magnetic field measurement, application and household appliances using superconducting devices, which can solve the problem that liquid nitrogen metal Dewar cannot meet the requirements of weak electromagnetic field and high sensitivity measurement, SQUID and detection window The distance cannot be adjusted, the distance cannot be adjusted, etc.

Inactive Publication Date: 2004-12-15
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of FRP Dewar is high, and its strength is not as good as that of metal Dewar. The distance between SQUID and the measured object cannot be adjusted.
In the article "High Temperature SQUID Magnetometer Nondestructive Testing Device and Its Application Research in Nondestructive Testing" published in Volume 24, Issue 4 of "Rare Metals", a non-magnetic stainless steel Dewar was designed. The Dewar is a wide-mouth container. The neck tube is not designed, the heat leakage is large, and the noise of liquid nitrogen evaporation may affect the detection of the magnetic field. Although the SQUID is also placed in the vacuum interlayer, the distance between the SQUID and the detection window cannot be adjusted
With the continuous development of high-temperature SQUID technology and the continuous improvement of detection level requirements, such a liquid nitrogen metal Dewar cannot meet the requirements of weak electromagnetic field and high sensitivity measurement

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
  • Adjustable distance liquid nitrogen metal dewar for high temperature super conductive quantum interferometer
  • Adjustable distance liquid nitrogen metal dewar for high temperature super conductive quantum interferometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The specific implementation of the present invention will be further described below in conjunction with accompanying drawing:

[0011] like figure 1 , figure 2 As shown, the present invention mainly includes: an outer cylinder 1 , an inner cylinder 2 , a distance adjustment and protection system 3 , a cold finger 4 , a neck tube 7 , a getter 8 , and a multilayer insulator 9 .

[0012] The outer cylinder 1 is welded by the cylindrical outer cylinder body 23, the lower bottom plate 10 of the outer cylinder and the flange 5. The sealing ring groove is opened on the flange 5, and the sealing ring 6 is installed, and the bolt in the screw hole 24 is connected with the upper cover. Plates 27 are connected and sealed. The inner cylinder 2 is formed by welding a cylindrical inner cylinder body 21 , an inner cylinder lower bottom plate 20 and an inner cylinder upper cover plate 22 . The neck pipe 7 passes through the upper cover plate 27 and the upper cover plate 22 of the ...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The distance adjustable liquid nitrogen metal dewar for high temperature superconductive quantum interferometer device (SQUID) includes inner tube, outer tube, neck pipe, cooling finger, distance regulating and protecting system, getter and multi-layer insulator. The dewar has main body made of non-magnetic stainless steel. The high temperature SQUID is adhered outside the bottom of oxygen-free copper cooling finger and the hollow cooling finger is filled with liquid nitrogen, so that the high temperature SQUID can operate in proper low temperature area and may be made to approach the measured matter via regulating the distance between the detecting window and the high temperature SQUID. The sandwiched layer between the inner tube and the outer tube is maintained at vacuum degree of 1E(-4) Pa and the inner tube and the neck pipe are wound with 40 layers of aluminum coated dacron film for heat insulation. Getter is set inside the heat insulator.

Description

Technical field: [0001] The invention relates to a liquid nitrogen metal Dewar. In particular, a high-temperature superconducting quantum interference device (SQUID) can be kept at a suitable working temperature, and the distance between the detection window and the high-temperature SQUID can be adjusted steplessly between 0.1-8 mm. Adjustable distance liquid nitrogen metal Dewar. It belongs to the field of cryogenic engineering and superconducting application technology. Background technique: [0002] A superconducting quantum interference device (SQUID) is a highly sensitive device that can measure weak magnetic flux changes. This kind of device must be placed in a low temperature and non-magnetic environment. The low temperature can ensure that the device is in a superconducting state, and the non-magnetism can ensure that the weak magnetic flux change signal can be measured. SQUID can be divided into liquid nitrogen temperature zone SQUID (low temperature SQUID) and l...

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): F25D3/10G01R33/035
Inventor 张洁徐烈陈赓华孔祥燕
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com