CERN LHC Project Note 110 (1997)
Multipacting tests with a resonant coaxial setup
F. Caspers, J.-M. Laurent, M. Morvillo, and F. Ruggiero
September 1997
Abstract:
In connection with electron-cloud induced heating of the LHC beam screen,
multipacting tests have been successfully performed using a resonant coaxial setup and
a wideband power amplifier.
We have developed a simple and reliable technique,
based on amplitude modulation of the input signal, to detect electronically the
onset of multipacting and to monitor the field level in the resonator.
Several multipacting patterns have been systematically investigated under the effect of
a variable DC-bias applied to the inner conductor of the coaxial setup.
The results at room temperature are qualitatively similar
to those obtained during cold tests with a magnetic field up to about 7.5 T.
F. Ruggiero
Tue Oct 14 14:11:35 1997