Tristan laboratory SQUID systems (pdf) are extremely sensitive instruments designed to detect small electromagnetic signals. By combining SQUID electronics with various special purpose probes and auxiliary electronics, laboratory systems having a variety of capabilities are made available, providing the ability to measure properties such as:

• Magnetic Fields and Gradients
• Magnetic Moments and Susceptibilities
• Electric and Magnetic Fluctuations
• DC Voltage, Resistance and Current
• AC resistance, self and mutual-inductance

Tristan standard systems are listed below.

Model BMS Basic Measuring Systems

The Model BMS-H is a HTS SQUID system capable of measuring magnetic fields smaller than 100 fT (100 x 10^-15 Tesla). Typically, this system is used in conjunction with a NLD series dewar.

The Model BMS-L is a LTS SQUID system capable of measuring small electric currents with a noise level less than 10^-12 A/√Hz. With a simple pickup coil, it also can be used for the detection of magnetic fields as small as 1 fT.

Model MFP Multi-Function Probe System

In addition to measurements possible with the PMS system, this system provides a low impedance ac bridge system for extremely sensitive resistance and inductance measurements. Resolutions of 10^-10 Ohm and 10^-13 Henry were obtained. The Model MFPallows a wide range of both ac and DC measurements to resolutions approaching 0.001% on single or multiple samples.

Model PMS Picovolt Measurement System

In addition to measurements possible with the BMS system, this system provides a cryogenic DC voltage amplifier with a gain of 10⁸ and a rms noise of less than 10^-13 V/√Hz. It is used for measurements of very small voltages and resistances.

iMAG® Laboratory SQUID Systems

Each system comprises: (1) dc SQUID Electronics; (2) Cryogenic Cable/Probe of standard length (1.5 meters); (3) either LTS or HTS dc SQUID sensor; (4) listed ancillary equipment including Model CC-6 six meter fiber-optic composite connecting cable, accessory package and user manual.

Model BMS-H High Temperature SQUID Measurement System

• Model iMC-303 Cryogenic Control Unit
• Model iFL-301-H Flux-Locked Loop for HTS SQUID Sensors
• Model SP Standard Cryogenic Cable
• Model HTM-3 HTS DC SQUID

Model BMS-L Basic Measurement System

• Model iMC-303 Cryogenic Control Unit
• Model iFL-301-L Flux-Locked Loop for LTS SQUID Sensors
• Model SP Standard Cryogenic Cable with accessory pack
• Model LSQ/20 LTS DC SQUID

Model MFP Multi-Function Probe Measurement System

• Model iMC-303 Cryogenic Control Unit
• Model iFL-301-L Flux-Locked Loop for LTS SQUID Sensors
• Model MFP Multi-Function Probe with accessory pack
• Model LSQ/20 LTS DC SQUID

Model PMS Picovolt Measurement System

• Model iMC-303 Cryogenic Control Unit
• Model iFL-301-L Flux-Locked Loop for LTS SQUID Sensors
• Model MFP Multi-Function Probe with accessory pack
• Model LSQ/20 LTS DC SQUID
• Model CCS Constant Current Source

Add-On Channels

Model LA1 – LTS Single Channel Add-on SQUID System includes Model iFL-301-L, Model SP, Model CC-6 and Model LSQ/20

Model HA1 – HTS Single Channel Add-on SQUID System includes Model iFL-301-H, Model SP, Model CC-6 and Model HTM-3