Preface
The 29th ICFA Advanced Beam Dynamics Workshop on Beam Halo Dynamics,
Diagnostics, and Collimation, in conjunction with the Beam-Beam'03 Workshop, was
held during the week of May 19-23, 2003, at Gurney's Inn at the eastern end of Long
Island, New York. The Brookhaven National Laboratory, the Brookhaven Science
Associates, the Spallation Neutron Source Project, and the US Department of Energy
sponsored the workshop.
Beam halo limits the performance of modern particle accelerators. Impact of beam halo
challenges the design and operations of high-intensity, high-brightness, and high-energy
accelerators: ISIS operating at the Rutherford-Appleton Laboratory, the Spallation
Neutron Source (SNS) and the Japan Proton Accelerator Research Complex (J-PARK)
presently under construction, the Relativistic Heavy Ion Collider (RHIC), the Fermilab
Tevatron, the Large Hadron Collider (LHC), and the proposed lepton linear colliders and
proton drivers. Although progress has been made in recent years, physical understanding
of halo dynamics is still far from comprehensive, and experimental benchmarking is just
beginning. State-of-the-art techniques are required for the detection and diagnosis of the
formation and development of beam halo, and technically demanding design and material
selection are needed for the scraping and collimation systems. It has become urgently
important to bring together theoretical and experimental physicists and engineers, with
expertise on beam dynamics, diagnostics, and collimation design working on both linear
and circular accelerators, for focused discussions and investigation of the subject. The
HALO'03 workshop was intended to provide such a platform for experts from the fields
of accelerator physics, diagnostics, engineering and material science.
The goal of the workshop was achieved by the effective planning and leadership of the
working-group chairs, a close interaction between various working groups, and an active
participation of our colleagues. There were 94 participants from laboratories and
universities in Asia, Europe, and America, and 88 invited and contributed presentations.
Each working day starts with a plenary session consisting of plenary talks and workinggroup progress reports followed by parallel sessions consisting of parallel talks and
organized discussions. Joint sessions were arranged among each of the three HALO'03
working groups and the Beam-Beam'03 working group.
I would like to thank the local organizing committee, the program committee, the
international advisory committee, John Jowett and the ICFA committee for their planning
and organization of the workshop. In particular, I would like to thank our working-group
chairs for their devotion and leadership, to thank Pam Manning for her coordination for
more than a year before, during, and after the workshop, and to thank the participants for
meeting the challenge of an unconventional workshop that bring together scientists of
typically non-overlapping fields into close interaction. The working-group chairs were:
HALO dynamics:
HALO diagnostics:
HALO collimation:
Beam-Beam:
Ingo Hofmann (GSI) and Alexei Fedotov (BNL)
Pete Cameron (BNL) and Kay Wittenburg (DESY)
Nikolai Mokhov (FNAL) and Angelika Drees (BNL)
Wolfram Fischer (BNL) and Tanagi Sen (FNAL)
Viewgraphs of all presentations are available on the web site:
www.c-ad.bnl.gov/halo03/misc/title.htm, then click "View Talk" at the right of the page.
JieWei