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  4. Comparison of cryogenic low-pass filters
 
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2017
Journal Article
Title

Comparison of cryogenic low-pass filters

Abstract
Low-temperature electronic transport measurements with high energy resolution require both effective low-pass filtering of high-frequency input noise and an optimized thermalization of the electronic system of the experiment. In recent years, elaborate filter designs have been developed for cryogenic low-level measurements, driven by the growing interest in fundamental quantum-physical phenomena at energy scales corresponding to temperatures in the few millikelvin regime. However, a single filter concept is often insufficient to thermalize the electronic system to the cryogenic bath and eliminate spurious high frequency noise. Moreover, the available concepts often provide inadequate filtering to operate at temperatures below 10 mK, which are routinely available now in dilution cryogenic systems. Herein we provide a comprehensive analysis of commonly used filter types, introduce a novel compact filter type based on ferrite compounds optimized for the frequency range above 20 GHz, and develop an improved filtering scheme providing adaptable broad-band low-pass characteristic for cryogenic low-level and quantum measurement applications at temperatures down to few millikelvin.
Author(s)
Thalmann, Marcel
Pernau, Hans-Fridtjof  
Strunk, Christoph
Scheer, Elke
Pietsch, Torsten
Journal
Review of scientific instruments  
Open Access
DOI
10.1063/1.4995076
Language
English
Fraunhofer-Institut für Physikalische Messtechnik IPM  
Keyword(s)
  • ferromagnetic material

  • electronic transport

  • thermodynamic

  • signal processing

  • pressure measurement

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