We describe electronic instruments for creation of effective Cooper pair spectroscopy. The suggested spectroscopy requires study electric field effects on the surface cleaved superconductors. instrument reacquires low noise amplifier with 10$^6$ amplitude amplification which we have formerly used Johnson-Nyquist and Schottky noises. nonspecific is followed by high-Q tunable resonance filter bas...

A classical paradox in high-mass star formation is that powerful radiation pressure can halt accretion, preventing further growth of a central star. Disk accretion has been proposed to solve this problem, but the disks and process are poorly understood. We executed high-resolution ($R$=35,000-70,000) iSHELL spectroscopy $K$-band for eleven protostars. Br-$\gamma$ emission was observed toward ei...