Low noise front end electronics for dilution refrigerator experiments
We have developed low noise voltage and low noise charge sensitive preamplifiers for use in dilution refrigerator experiments. The amplifiers use a JFET at 140K as the front end. Each JEET dissipates about 7 mW on the 4K heat sink. The flat noise of the voltage amplifier is 0.9 nV/Hz1/2, with the 1/f knee below 100 Hz. The charge amplifier noise is 500 eV with a total input capacitance of approximately 90 pF.
Stockwell, W., Yvon, D., Aubourg, É., Barnes, P. D., Cummings, A., Da Silva, A., Ellman, B., Ross, R. R., Sadoulet, B., Shutt, T., Smith, G., Stubbs, C., Wang, N., White, S., & Young, B. A. (1993). Low noise front end electronics for dilution refrigerator experiments. Journal of Low Temperature Physics, 93(3), 755–760. https://doi.org/10.1007/BF00693508