Sensor

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 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/ÖHz. 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/ÖHz)
• 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., B_x, B_y) are available as options.

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 ultrasensitive measurements of both current (< 0.7 pA/ÖHz) and magnetic field (< 1 fT/Ö 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 Meg pdf) for more information.

   Input coil inductance: 1.8 µH nominal

   Noise level: < 5 x 10^-31 J/Hz

                     < 5 x 10^-6 Fo/ÖHz

   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 20 fT/ÖHz. 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/ÖHz 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/ÖHz 1/ƒ knee: ~ 10 Hz Baseline: 10 mm Operating Temperature: 77 K	HTM-0 MiniMAG™ -Microscope Sensitivity: < 20 pT/ÖHz 1/ƒ knee: ~ 10 Hz Size of pickup coil: 50 micron Operating Temperature: 77 K

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