Construction and testing of a common mode choke for cryogenic detector pre-amplifiers

Common-mode choke inductors are useful tools for resolving grounding issues in large detector systems. Using inductive components on cryogenic pre-amplifier boards has so far been prevented by the poor low-temperature performance of common ferrite materialssuch as NiZn and MnZn. Recentlydeveloped nanocrystallineand amorphous materials promise improved up to point where using magnetics at liquid mitrogen temperatures becomes feasible. This research applies work Yin et al. characterizing constructing testing a mode inductor use pre-amplifiers ELT first generation instruments.