1,029 research outputs found
Educating and Training Accelerator Scientists and Technologists for Tomorrow
Accelerator science and technology is inherently an integrative discipline
that combines aspects of physics, computational science, electrical and
mechanical engineering. As few universities offer full academic programs, the
education of accelerator physicists and engineers for the future has primarily
relied on a combination of on-the-job training supplemented with intense
courses at regional accelerator schools. This paper describes the approaches
being used to satisfy the educational interests of a growing number of
interested physicists and engineers.Comment: 19 pages, 3 figure
Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 6: Accelerator Capabilities
These reports present the results of the 2013 Community Summer Study of the
APS Division of Particles and Fields ("Snowmass 2013") on the future program of
particle physics in the U.S. Chapter 6, on Accelerator Capabilities, discusses
the future progress of accelerator technology, including issues for high-energy
hadron and lepton colliders, high-intensity beams, electron-ion colliders, and
necessary R&D for future accelerator technologies.Comment: 26 page
Science Requirements and Conceptual Design for a Polarized Medium Energy Electron-Ion Collider at Jefferson Lab
This report presents a brief summary of the science opportunities and program
of a polarized medium energy electron-ion collider at Jefferson Lab and a
comprehensive description of the conceptual design of such a collider based on
the CEBAF electron accelerator facility.Comment: 160 pages, ~93 figures This work was supported by the U.S. Department
of Energy, Office of Nuclear Physics, under Contract No. DE-AC05-06OR23177,
DE-AC02-06CH11357, DE-AC05-060R23177, and DESC0005823. The U.S. Government
retains a non-exclusive, paid-up, irrevocable, world-wide license to publish
or reproduce this manuscript for U.S. Government purpose
Soft X-ray reflectivity: from quasi-perfect mirrors to accelerator walls
Reflection of light from surfaces is a very common, but complex phenomenon
not only in science and technology, but in every day life. The underlying basic
optical principles have been developed within the last five centuries using
visible light available from the sun or other laboratory light sources. X-rays
were detected in 1895, and the full potential of soft- and hard-x ray radiation
as a probe for the electronic and geometric properties of matter, for material
analysis and its characterisation is available only since the advent of
synchrotron radiation sources some 50 years ago. On the other hand
high-brilliance and high power synchrotron radiation of present-days 3rd and
4th generation light sources is not always beneficial. Highenergy machines and
accelerator-based light sources can suffer from a serious performance drop or
limitations due to interaction of the synchrotron radiation with the
accelerator walls, thus producing clouds of photoelectrons (e-cloud) which in
turn interact with the accelerated beam. Thus the suitable choice of
accelerator materials and their surface coating, which determines the x-ray
optical behaviour is of utmost importance to achieve ultimate emittance. Basic
optical principles and examples on reflectivity for selected materials are
given here.Comment: 11 pages, contribution to the Joint INFN-CERN-EuCARD-AccNet Workshop
on Electron-Cloud Effects: ECLOUD'12; 5-9 Jun 2012, La Biodola, Isola d'Elba,
Italy; CERN Yellow Report CERN-2013-002, pp.105-11
Nonequilibrium electron rings for synchrotron radiation production
Electron storage rings used for the production of synchrotron radiation (SR)
have an output photon brightness that is limited by the equilibrium beam
emittance. By using interleaved injection and ejection of bunches from a source
with repetition rate greater than 1 kHz, we show that it is practicable to
overcome this limit in rings of energy ~1 GeV. Sufficiently short kicker pulse
lengths enable effective currents of many milliamperes, which can deliver a
significant flux of diffraction-limited soft X-ray photons. Thus, either
existing SR facilities may be adapted for non-equilibrium operation, or the
technique applied to construct SR rings smaller than their storage ring
equivalent.Comment: 5 pages, 2 figures; accepted for publication in Physical Review
Letter
A Review of Possible Future High-Energy Colliders for the Post-LHC Era
A review of the studies being conducted by various laboratories and collaborations in order to determine and optimise the next generation of particle accelerators for physics at the high energy frontier beyond HERA1) at DESY, LEP2) and LHC3) at CERN, SLC4) at SLAC and the TEVATRON5) at FNAL is presented. The relative advantages of the Very Large Hadron Colliders, Electron Positron Colliders and Muon Colliders are compared pointing out their main challenges and key issues both in beam dynamics and technology. The present status and future plans of the studies are summarised outlining the research and development of key components and their tests in ambitious test facilities. Finally, the schedules presently assumed and the possible scenarios for the post-LHC-era around 2010 are presented
Accelerator Testing of the General Antiparticle Spectrometer, a Novel Approach to Indirect Dark Matter Detection
We report on recent accelerator testing of a prototype general antiparticle
spectrometer (GAPS). GAPS is a novel approach for indirect dark matter searches
that exploits the antideuterons produced in neutralino-neutralino
annihilations. GAPS captures these antideuterons into a target with the
subsequent formation of exotic atoms. These exotic atoms decay with the
emission of X-rays of precisely defined energy and a correlated pion signature
from nuclear annihilation. This signature uniquely characterizes the
antideuterons. Preliminary analysis of data from a prototype GAPS in an
antiproton beam at the KEK accelerator in Japan has confirmed the
multi-X-ray/pion star topology and indicated X-ray yields consistent with prior
expectations. Moreover our success in utilizing solid rather than gas targets
represents a significant simplification over our original approach and offers
potential gains in sensitivity through reduced dead mass in the target area.Comment: 18 pages, 9 figures, submitted to JCA
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