The Monitor System of the 7MeV Proton Linac at ICR
Y. Iwashita, M. Kando, M. Ikegami, H. Dewa, T. Shirai,
S. Kakigi, H. Fujita, A. Noda, and M. Inoue
Accelerator Laboratory Nuclear Science Research Facility,
Institute for Chemical Research, Kyoto University, JAPAN
The beam monitor system at ICR 7MeV proton linac is described. Because of the
pulsed beam ( <1% duty ) and the simplicity, fluorescence on a screen plate is
observed for the beam profile monitoring. To clear the beam line, the screen can
be flipped away by an electromagnetic actuator installed in the vacuum vessel.
With this view screen, an emittance monitor is constructed. The beam current can
be measured non-destructively by a core monitor. Because the pulse length is
rather long (~ 50 Ás), a special pre-amplifier using Negative Impedance
Converter is designed. Very thin steering magnet with eight poles is also
developed to compensate the deflection of the output beam.
Here is the PostScript document.