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Introduction to the NHMFL Pulsed Field Facility at LANL

Information on the physical set-up of pulsed field measurements

Read about lock-in amplifiers and their role in your measurements

Information about noise and ways to eliminate it from your measurements

How to collect and evaluate your measurement data

Information on optical spectroscopy

Information about time-resolved optics

Information on de Haas van Alphen Effect measurements

Information on Shubinkov de Haas Effect measurements

Information on Absolute Resistivity measurements

Information on Heat Capacity measurements

Information on RF Penetration Depth measurements

Ground Loops


GROUNDING POINTS:

It is important to have a single grounding point in the experiment. To prevent low-impedance loops in ground circuits from causing interference as currents are induced in them. Ground loops can occur in cables, plumbing, and any other conducting path. The main NHMFL grounding point is the northeast corner of the laboratory.

One useful form of ground loop prevention is the isolation transformer. Another method used to prevent ground loops involves insulating plumbing for the vacuum pumps. Similarly, cryostats are isolated by using insulating o-rings with clamps between them and the metal hose that connects them to the helium-3 system. Your probe may also be similarly isolated from the cryostat.