Sensors

Tristan offers several configurations of low-noise SQUID sensors (pdf); these sensors serve as the heart of our iMAG® systems. Address your magnetic sensing applications with the latest technology in both high-temperature and low-temperature superconductivity.

The low-temperature (LTS) SQUIDs run at liquid helium temperatures and are fabricated using all thin-film trilayer technology, combining durability with high sensitivity. The niobium-shielded package comes with screw terminals ready to accept your custom input circuit. Tristan can also provide thin-film integrated LTS SQUID magnetometers with state-of-the-art performance.

The high-temperature (HTS) SQUIDs run at liquid nitrogen temperatures, 77 K. HTS iMAG® SQUIDs feature pick-up coils patterned on the chip, with a tough passivation layer for protection from moisture and oxygen. We can guarantee magnetometer performance better than 20 fT/√Hz. For customers who need even lower noise levels, we can provide sensors with world-record noise performance; contact us for the latest specifications and pricing. All HTS iMAG® sensors use a common connector for attaching to the SP Cryogenic Cable; sensors may be easily interchanged to provide alternative pick up coils and different sensitivity levels.

  • Model LSQ/20 LTS dc SQUID sensor
  • Model LSQ/20M LTS dc SQUID sensor (for MFP Probe)
  • Model HTM-8 HTS dc SQUID Magnetometer Sensor ( > 0.1mT ambient field operation)
  • Model HTM-16 HTS dc SQUID Magnetometer Sensor ( < 20 fT/√Hz)
  • Model HTG-10R HTS dc SQUID Gradiometer Sensor ( > 100 µT ambient field operation)
  • Model HTM-0 MiniMAG™ HTS dc SQUID Microscope Sensor ( > 100 µT ambient field operation, 50 micron thick window)

Lower noise sensors, high field operation and sensors mounted at 90° orientations (i.e., Bx, By) are available as options.

 Low-Temperature (LTS) SQUIDs

The low-temperature (LTS) SQUIDs run at liquid helium temperatures and are fabricated using a niobium / aluminum all thin-film trilayer technology that combines durability with high sensitivity. They feature symmetric integral signal and modulation coils that eliminate output variations with varying input loads. The niobium-shielded package comes with screw terminals ready to accept your custom input circuit. Tristan can also provide thin-film integrated LTS SQUID magnetometers with state-of-the-art performance. The Tristan Model LSQ/20 can be used with the Model SP Cryogenic Cable for ultra-sensitive measurements of both current (< 0.7 pA/√Hz) and magnetic field (< 1 fT/√ Hz). In conjunction with the Model MFP Cryogenic Probe, it can measure a much wider range of electromagnetic properties — download Tristan’s Cryogenic Probe data sheet (1 M pdf) for more information.

   Input coil inductance: 1.8 µH nominal

   Noise level: < 5 x 10-31 J/Hz

                     < 5 x 10-6 Fo/√Hz

                     1/ƒ knee: below 0.5 Hz

   Input coil sensitivity: 0.2 µA/Fo

   Temperature range: 0 – 7 K

High-Temperature (HTS) SQUIDs

The high-temperature (HTS) SQUIDs run at liquid nitrogen temperatures, 77 K, and are offered in a magnetometer configuration. Tristan’s HTS iMAG® SQUIDs feature pick-up coils patterned on the chip and a tough passivation layer for protection from moisture and oxygen. We can guarantee magnetometer performance better than 100 fT/√Hz. For customers who need even lower noise levels and performance in magnetic fields, we can provide sensors with world-record noise performance; contact us for the latest specifications and pricing. All HTS iMAG® sensors use a common connector for attaching to the Model SP Cryogenic Cable; they may be easily interchanged to allow alternative pick-up coils and different sensitivity levels.

HTM-8

Sensitivity: < 50 fT/√Hz

1/ƒ knee: ~ 10 Hz

Pick-up Coil dimensions: 8 mm x 8 mm

Operating Temperature: 77 K

Operating field: 0 – > 1 mT

HTG-10R -Gradiometer

Sensitivity: < 70 fT/cm/√Hz

1/ƒ knee: ~ 10 Hz

Baseline: 10 mm

Operating Temperature: 77 K

HTM-0 MiniMAG™ -Microscope

Sensitivity: < 20 pT/√Hz

1/ƒ knee: ~ 10 Hz

Size of pickup coil: 50 micron

Operating Temperature: 77 K

Top