Speaker
Dr
Masaki Hori
(Max-Planck Institute for Quantum Optics)
Description
The Linac4, now being constructed at CERN, will provide 160-MeV H- beams of high intensity of 2x10^14 ions/s. Some sequences of 500-ps-long micro-bunches must be removed from the beam using a chopper before the H- ions can be further accelerated in the Proton Synchrotron. We developed a monitor to measure the time structure and spatial profile of this high-intensity chopped beam, with respective resolutions 1 ns and 2mm. The ion beam first struck a carbon foil, and secondary electrons emerging from the foil were accelerated by a series of parallel grid electrodes. These electrons struck a phosphor screen, and the resulting image of the scintillation light was guided to a CCD camera. The time resolution was attained by applying high-voltage pulses of sub-nanosecond rise and fall times to the grids. The monitor has been tested with 700-ps-long UV laser pulses, and a 3-MeV proton beam.
Preferred medium (Oral/poster)
Poster
Author
Dr
Masaki Hori
(Max-Planck Institute for Quantum Optics)
Co-author
Dr
Klaus Hanke
(CERN)
