Current Measurement with sub-nanoamperes resolution of CW beams and macropulses.
Based on a prototype developed by S. Srinivasan and P.A. Duperrex at PSI, the CR-BCM is a re-entrant cavity resonator used as a beam current monitor. The CR-BCM operates at the fundamental mode of resonance, i.e. transverse magnetic mode tuned to a given harmonic of the beam repetition rate.
The fundamental mode of resonance is proportional to the beam current or to the bunch charge of single beam pulses. The re-entrant cavity resonator provides a position- and beam-size-independent response. Calibration check is possible without dismounting the cavity from the beam line.
- Beam repetition frequency from 30 MHz to 175 MHz
- Response time < 1 µs
- 100 mm axial length
- 300 mm external diameter
- Cavity systems are known for providing a linear response over a large dynamic range and superior sensitivity compared to commonly used current monitors.
- The CR-BCM is optimized for applications in charged particle radiation therapy facilities, FLASH experiments, radio-isotope production facilities.
The CR-BCM has fixed outer dimensions for any bunch repetition frequency between 30 MHz and 175 MHz:
- Axial length: 100 mm
- External diameter: 300 mm
Visit the CR-BCM page to learn more.