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
active damping.
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.
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Some of the
topics to be covered are:
o
Review of
observations at the SPS, PSR, and the B factories.
o
Experimental
methods and e-cloud diagnostics.
o
Lessons
learned from simulation comparisons with experiments (effect of secondary
emission yield, understanding of single-bunch instabilities, etc)
o
Predictions
for intense proton and heavy-ion machines.
o
Progress in
simulation codes and the physical model involved.
o
Progress in
analytical models.
o
Various
methods of mitigating ECE (e.g. Landau damping, e-suppression coatings, beam
scrubbing, clearing fields, beam manipulation, and active damping)
o
Summarize
our understanding, identify essential issues, and scope out future research
avenues.
o
Assess state
of theory and simulations.
o
Identify and
assess mitigation mechanisms.
o
Compile list
of simulation codes and their features.
o
Assess
experimental methods and diagnostics.
o
Strengthen
and expand international collaborations.