TY - JOUR AU - Jefferts, Steven AU - Heavner, Thomas AU - Hayes, P AU - Dunn, G C2 - Review of Scientific Instruments DA - 1993-01-01 LA - en M1 - 64 PB - Review of Scientific Instruments PY - 1993 TI - Superconducting resonator and a cryogenic GaAs field-effect transistor amplifier as a single-ion detection system ER -