Nondestructive synchronous beam current monitor.

  title={Nondestructive synchronous beam current monitor.},
  author={Michel Kireeff Covo},
  journal={The Review of scientific instruments},
  volume={85 12},
A fast current transformer is mounted after the deflectors of the Berkeley 88-Inch Cyclotron. The measured signal is amplified and connected to the input of a lock-in amplifier. The lock-in amplifier performs a synchronous detection of the signal at the cyclotron second harmonic frequency. The magnitude of the signal detected is calibrated against a Faraday cup and corresponds to the beam intensity. It has exceptional resolution, long term stability, and can measure the beam current leaving the… CONTINUE READING