Electron-Cloud Effects "ECLOUD'04"
1st Announcement and Scope (pdf file)
The existence of electron
cloud effects (ECEs), which include vacuum
pressure rise, emittance growth, instabilities,
heat load on cryogenic walls and interference with certain beam diagnostics,
have been firmly established at several storage rings, including the PF, BEPC,
KEK-B, PEP-II, SPS, PSR, APS and RHIC, and is a primary concern for future
machines that use intense beams such as linear collider
damping rings, B factory upgrades, heavy-ion fusion drivers,
spallation neutron sources and the LHC.
This ICFA workshop will
review experimental methods and results obtained within the past few years on
the ECE, along with progress on its understanding obtained from simulations
and analytic theory, and the effectiveness of mitigation mechanisms, including
As in previous workshops dealing with the ECE (MBI'97, KEK, July 1997; Two-Stream Instabilities, Santa Fe, February 2000; Two-Stream Instabilities, KEK, September 2001; ECLOUD'02, CERN, April 2002), the focus of ECLOUD04 will be broad, covering all aspects of the phenomenon.
Some of the
topics to be covered are:
observations at the SPS, PSR, and the B factories.
methods and e-cloud diagnostics.
learned from simulation comparisons with experiments (effect of secondary
emission yield, understanding of single-bunch instabilities, etc)
for intense proton and heavy-ion machines.
simulation codes and the physical model involved.
methods of mitigating ECE (e.g. Landau damping, e-suppression coatings, beam
scrubbing, clearing fields, beam manipulation, and active damping)
Some of the goals
that will guide the workshop are:
our understanding, identify essential issues, and scope out future research
of theory and simulations.
assess mitigation mechanisms.
of simulation codes and their features.
experimental methods and diagnostics.
and expand international collaborations.
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