Accelerator Physics Studies for the Luminosity Upgrade of HERA

by Georg Hofstaetter (DESY)

Thursday 11 Jan 2001, 16:00 → 17:00 Europe/Zurich

SL Auditorium (CERN)

DESY is currently working on decreasing the size of the proton beam and of the electron beam in HERA at the collider experiments H1 and ZEUS by moving quadrupoles closer to the interaction points and by increasing their strength. To match the smaller proton beam size, the horizontal electron emittance has to be decreased by changing the damping partition numbers and by an increase in the phase advance per FODO cell from currently 60 degrees to 72 degrees. Together with reaching design currents, these measures should increase the luminosity of HERA from the current maximum value of 2 to 7.6 10**31 cm**-2**-1. Experimental tests have been carried out to find whether the changes in the electron optics will be problematic for lifetime, luminosity, dynamic aperture, polarization, or the electron beam distribution. Furthermore the influence of the increased beam beam force on the proton beam and on the electron beam has been investigated experimentally.

Organiser(s): Werner Herr, SL Division

Note: Tea and coffee will be served at 15:30 in front of the Auditorium. Information: http://www.cern.ch/CERN/Divisions/SL/news/news.html

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