1,010 research outputs found
Beam-Material Interaction
Th is paper is motivated by the growing importance of better understanding of
the phenomena and consequences of high- intensity energetic particle beam
interactions with accelerator, generic target , and detector components. It
reviews the principal physical processes of fast-particle interactions with
matter, effects in materials under irradiation, materials response, related to
component lifetime and performance, simulation techniques, and methods of
mitigating the impact of radiation on the components and envir onment in
challenging current and future applicationComment: 28 pages, contribution to the 2014 Joint International Accelerator
School: Beam Loss and Accelerator Protection, Newport Beach, CA, USA , 5-14
Nov 201
Towards the optimal energy of the proton driver for a neutrino factory and muon collider
Cross section data from the HARP experiment for pion production by protons
from a tantalum target have been convoluted with the acceptance of the
front-end channel for the proposed neutrino factory or muon collider and
integrated over the full phase space measured by HARP, to determine the
beam-energy dependence of the muon yield. This permits a determination of the
optimal beam energy for the proton driver for these projects. The cross section
data are corrected for the beam-energy dependent amplification due to the
development of hadronic showers in a thick target. The conclusion is that, for
constant beam power, the yield is maximum for a beam energy of about 7 GeV, but
it is within 10% of this maximum for 4<Tbeam < 11 GeV, and within 20% of the
maximum for Tbeam as low as 2 GeV. This result is insensitive to which of the
two HARP groups' results are used, and to which pion generator is used to
compute the thick target effects
Conceptual designs of dipole magnet for muon collider ring
Conceptual designs of a superconducting dipole magnet for a Storage Ring of a
Muon Collider with a 1.5 TeV center of mass (c.o.m.) energy and an average
luminosity of 10 34 cm-2s-1 are presented. In contrast to proton machines, the
dipoles for the Muon Collider should be able to handle ~0.5 kW/m of dynamic
heat load from the muon beam decays. The magnets are based on Nb3Sn
superconductor and designed to provide an operating field of 10 T in the 20-mm
aperture with the critical current margin required for reliable machine
operation. The magnet cross-sections were optimized to achieve the best
possible field quality in the aperture occupied by beams. The developed
mechanical structures provide adequate coil prestress and support at the
maximum level of Lorentz forces in the coil. Magnet parameters are reported and
compared with the requirements.Comment: 4 pp. Applied Superconductivity Conference (ASC 2010), 1-6 Aug 2010:
Washington, D.
Summary of working group g: beam material interaction
For the first time, the workshop on High-Intensity and High-Brightness Hadron
Beams (HB2010), held at Morschach, Switzerland and organized by the Paul
Scherrer Institute, included a Working group dealing with the interaction
between beam and material. Due to the high power beams of existing and future
facilities, this topic is already of great relevance for such machines and is
expected to become even more important in the future. While more specialized
workshops related to topics of radiation damage, activation or thermo -
mechanical calculations, already exist, HB2010 provided the occasion to discuss
the interplay of these topics, focusing on components like targets, beam dumps
and collimators, whose reliability are crucial for a user facility. In
addition, a broader community of people working on a variety of issues related
to the operation of accelerators could be informed and their interest sparked.Comment: 3 pp. 46th ICFA Advanced Beam Dynamics Workshop HB2010, Sep 27 - Oct
1 2010: Morschach, Switzerlan
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