SQUID System

 

LTS/HTS SQUID Systems

  
     

Manufacture : Tristan Technologies

Application

    • Laboratory ¨­ basic measurement system, SQUID susceptometer
      • Magnetic field measurements
        • Magnetic field and field gradient components
        • Measurement of quantities as low as 10-10 gauss/¡îHz
      • Electromagnetic properties
        • current : input impedance (~1¥ìH), sensitivity (10-12 A)
        • voltage : sensitivity (10-14 V), can be used for thermometry at mK temperature
        • inductance and reactance (pH)
        • magnetization and susceptibility
      • SQUID susceptometry
      • Other uses
        • SQUID NMR
        • displacement (for gravity wave experiments)

         

    • Biomagnetic ¨­ 150 channel neuromagnetometer, single channel biomagnetometer, Liver-Iron biosusceptometer, custom biomagnetometer
      • Magnetoencephalography
        • field intensity : 10-7 gauss/¡îHz to 10-11 gauss/¡îHz
        • applications : Epilepsy, Neuromuscular disorders, Drug development and testing, Stroke, Alzheimer's disease, Presurgical cortical function mapping, Prenatal brain disorders, Performance evalutations
      • Magnetocardiography
        • field intensity : 10-6 gauss/¡îHz to 10-8 gauss/¡îHz
        • applications : arrhythmia, heart muscle damage, fetal cardiography
      • Nerve
        • applications : Nerve damage, Peripheral Nerve damage, Spinal cord damage
      • Other applications
        • studies of the Stomach-Gastroenterology, intestinal Ischemia, non-invasive in-vivo Magnetic Liver Biopsies, Lung function and Clearance studies-Magnetopneumography, Organ Transplant Rejection Risk, Blood Flow Disorders, small SQUID MRI for Pathology

         

    • Geophysical ¨­ 3-axis HTS magnetometer, Rock magnetometer
      • MagnetoTellurics
        • sensitivity : 10-8 gauss/¡îHz
        • applications : oil exploration, well cracking
      • Geophysical monitoring
        • applications : Earthquakes, Volcano flow
      • Controlled Source ElectroMagnetics
        • used for finding minerals, buried drums
      • Unexploded Ordinance (UXO)
      • Airborne systems (8-element arrays)
      • Borehole
        • mineral searches to few hundred meter depths
      • Rock magnetometer : paleoarcheology
      • Other applications
        • underwater telephone cable detection, environmental monitoring, oceanographic measurements, buried structures and materials

         

    • NDT (Non-Destructive Testing) ¨­ Basic and custom NDT systems
      • Imaging techniques
        • intrinsic currents
        • remnant magnetization
        • flaw-induced perturbations in applied currents
        • eddy currents in an applied ac field (flaws)
        • Hysteretic magnetization
        • Magnetization of paramagnetic & diamagnetic materials in dc magnetic fields

         

    • Large Scale Applications : defect detections (cracks, voids, corrosion, weld inspection, strain detection, etc.)
      • NDT on Steel and Pipes
      • Non-ferrous metals : flaw features<150¥ìm
      • Solar Cells : potential application in looking for "voids"
      • Bridges, Runways, Buildings : corrosion in reinforcing rods
      • Aircraft : corrosion

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    • Small Scale Applications
      • Electronics : Timing and Clocking circuits, non-contact
      • Electron Density Structure Analysis in high speed devices
      • Circuit board and IC mapping
      • Magnetic Structure Mapping : disc drives
      • LAN signal propagation
      • Process control : thickness monitoring
      • Metrology and QA
  

Microwave Materials Analyzer

  

Non-contact Materials analysis

  • Surface Resistance of Metals and Semiconductors
  • Dielectric Constant and Loss Tangent in Dielectrics
  • Thickness Extraction in Dielectrics
  • Rapid Scanning of the Surface (! min/ 200 mm wafer)
  • Computer Control and Data Analysis