Preface
The 20th ICFA Advanced Beam Dynamics Workshop took place at Fermilab (Batavia, Illinois, USA) on
April 8-12, 2002. Fermilab and KEK co-sponsored the Workshop. The theme of the Workshop was "HighIntensity and High-Brightness Hadron Beams." This was the first ICFA workshop fully devoted to this
subject. A broad range of topics was discussed, including reviews of the performance of existing highintensity hadron machines, overviews of planned high-intensity hadron sources and projects, accelerator
physics issues, technical systems designs, and applications of these beams in high-energy and nuclear
physics as well as in fusion studies, medicine, industrial uses, and other fields.
The Workshop was held at an opportune time. Several hadron accelerators recently have been completed,
several are under construction, and many more are planned or projected to meet future needs. Recently
completed accelerators include the AGS Booster and the Fermilab Main Injector. Both of these are being
developed to obtain high-intensity high-brightness hadron beams. The Japan Hadron Facility (JHF) at
JAERI/KEK and the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory are under
construction and will increase medium-energy proton beams and neutron source intensities by an order of
magnitude. The Large Hadron Collider (LHC) at CERN will use high-brightness proton beams provided by
the CERN PS and SPS to explore the energy frontier. Future projects such as the Proton Driver, CERN
SPL, AHF, ESS, Radioactive Ion Beams, etc. are also being developed.
The paramount advance in recent high-energy physics research is the convincing evidence for neutrino
oscillations and neutrino mass. High-intensity hadron beams are needed to obtain the high-intensity and
high-quality neutrino beams required to determine the parameters in the multi-neutrino system. Existing
hadron beams will be used at maximum intensities in new beam lines (NuMI, MiniBooNE, K2K, and
CNGS experiments) to explore neutrino properties. Higher intensities using new facilities (JHF, SPL,
Proton Driver, upgraded Main Injector, neutrino factories, etc.) will also be needed. It was emphasized at
the workshop that the U.S. high-energy physics community must prepare a proposal for a mid-size
accelerator project (a proton driver) in addition to the large-size linear collider project in order to guarantee
a future in the particle physics frontiers for this community.
The Workshop had about 160 participants and included about 140 presentations on various aspects of highintensity and high-brightness hadron beams. Reports on the great majority of these are included in these
proceedings. There were 4 plenary sessions, 3 working groups and 11 parallel sessions. A guided tour at
Fermilab was also provided on the last day. A complete program can be found at the end of the
proceedings.
The first two plenary sessions covered topics of general interest, including the physics based on highintensity secondary particles obtained from intense proton sources (muon, neutrino, kaon, neutron, pion,
etc.), and an overview of machines under construction (JHF and SNS) or being proposed (synchrotronbased proton drivers, linac-based proton drivers, and an 8-GeV superconducting proton linac). The working
groups discussed various aspects concerning circular accelerators, linear accelerators, beam lines and
targets. Each of the parallel sessions focused on a specific topic. The three working groups and eleven
parallel sessions and their conveners are listed below:
Working Groups
WGI - Circular Accelerators
WGII - Linear Accelerators
WG III - Beamlines and Targets
Conveners
L. Teng (ANL), R. Cappi (CERN)
J-M. Lagniel (CEA-Saclay), R. Garoby (CERN)
C. Moore (Fermilab), K. McDonald (Princeton U.)
Parallel Sessions
A. Lattices
B. Beam Loss, Collimation, and Shielding
C and G (Joint) FFAGs and Cyclotrons
Conveners
A. Thiessen (LANL)
N. Mokhov (Fermilab)
R. Baartman (Triumf), Y. Mori (KEK),
XI
D. New Ideas
E. Space Charge Simulations
F. Remote Handling
H. Ion Sources
I. Space Charge Experiments
J. Hadron Beam Cooling
K. H~ Stripping
L. Electron Cloud Effects
P. Schmelzbach (PSI)
K. Takayama (KEK), C. Ankenbrandt (Fermilab)
I. Hofmann (GSI), R. Ryne (LBL)
D. Pushka (Fermilab)
H. Klein (U. of Frankfurt), K-N. Leung (LBL)
S. Machida (KEK)
S. Nagaitsev (Fermilab)
I. Yamane (KEK)
R. Macek (LANL)
At the Workshop were comprehensive discussions on critical features and problems of high-intensity and
high-brightness hadron beams, including those of past, present, and future facilities. The final two plenary
sessions included reports from the neutrino physics study groups at Fermilab and BNL. Both of these
studies were initiated by the lab directors. There was also a report on high brightness ion beams for
medicine, industry and fusion from LBL. The conveners of each working group and parallel session gave
summary reports. S. Holmes, Associate Director of Fermilab for Accelerators, presented closing remarks.
The Workshop was a highly productive event for the organizers and the participants. It strengthened the
communication and collaboration between accelerator physicists and high-energy physicists as well as
among accelerator physicists working in the same field but at different institutions. We take this
opportunity to thank the Local Organizing Committee, the Program Committee, the International Advisory
Committee and the working group organizers and session conveners for their help with the Workshop. We
would especially like to thank Patti Poole, Cynthia Sazama and Suzanne Weber for their untiring efforts in
organizing the meeting, and to Ernie Malamud for preparing the workshop web site (http://wwwbd.fnal.gov/HB2002). Viewgraphs of most of the presentations can be found on this web site, including the
very few that are not represented by proceedings papers.
In view of the worldwide strong interest in high-intensity high-brightness hadron beams, it was decided to
have another ICFA workshop on this subject around 2004-2005 in Europe. The organizers will be Ingo
Hofmann (GSI) and Jean-Michel Lagniel (CEA-Saclay).
Weiren Chou, Yoshiharu Mori, David Neuffer, and Jean-Frangois Ostiguy
Editors
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