<font color=red size=+1><blink>Postponed to 29th November 2001 at 4PM</blink></font><br>Effect of the recent SPS impedance reduction on single bunch s

by Elena Shaposhnikova (CERN/SL)

Thursday 22 Nov 2001, 16:00 → 17:00 Europe/Zurich

SL Auditorium (CERN)

The longitudinal single bunch (microwave) instability of the proton beam in the SPS has a long history. Already observed for the first time in 1977, it became an important issue for the high intensity and high quality beam required for LHC. The main sources of impedance causing this instability were found in 1996 using a new method based on measurements of the spectrum of unstable single bunches. During the last shutdown the major part of the impedance reduction programme was completed. In this talk recent beam measurements are compared with previous results. Data obtained below transition energy is also presented.

Organiser(s): Werner Herr / SL Division

Note: * Tea and coffee will be served at 15:30 in front of the Auditorium