TY - JOUR AU - S. Jefferts AU - T. Heavner AU - P. Hayes AU - Gordon Dunn BT - Review of Scientific Instruments DA - Jan-01-1993 DO - 10.1063/1.1144153 PY - 1993 EP - 737 T2 - Review of Scientific Instruments TI - Superconducting resonator and a cryogenic GaAs field-effect transistor amplifier as a single-ion detection system VL - 64 SN - 00346748 ER -