254 research outputs found
Phase Rotation, Cooling And Acceleration Of Muon Beams: A Comparison Of Different Approaches
Experimental and theoretical activities are underway at CERN with the aim of
examining the feasibility of a very-high-flux neutrino source. In the present
scheme, a high-power proton beam (some 4 MW) bombards a target where pions are
produced. The pions are collected and decay to muons under controlled optical
condition. The muons are cooled and accelerated to a final energy of 50 GeV
before being injected into a decay ring where they decay under well-defined
conditions of energy and emittance.
We present the most challenging parts of the whole scenario, the muon
capture, the ionisation-cooling and the first stage of the muon acceleration.
Different schemes, their performance and the technical challenges are compared.Comment: LINAC 2000 CONFERENCE, paper ID No. THC1
Measurement of transverse beam emittance of split beams for the CERN Proton Synchrotron Multi-Turn Extraction
Crossing a horizontal nonlinear resonance is the approach that can be used to
split a beam in several beamlets with the goal to perform multi-turn extraction
from a circular particle accelerator. Such an approach has been successfully
implemented in the CERN Proton Synchrotron and is used routinely for the
production of high-intensity proton beams for fixed-target physics at the Super
Proton Synchrotron. Recently, thanks to the deployment of diamond detectors,
originally installed to monitor the beam losses at extraction, it has been
possible to measure the horizontal beam emittance of the split beam just prior
to extraction. This is the first time that an emittance measurement is
attempted for split beams, i.e. in a regime of highly nonlinear beam dynamics.
In this paper, the technique is presented and its application to the analysis
of the experimental data is presented and discussed in detail. This result is
essential for the performance assessment of the splitting process and for the
design of further performance improvements
OxyCAP UK: Oxyfuel Combustion - academic Programme for the UK
The OxyCAP-UK (Oxyfuel Combustion - Academic Programme for the UK) programme was a £2 M collaboration involving researchers from seven UK universities, supported by E.On and the Engineering and Physical Sciences Research Council. The programme, which ran from November 2009 to July 2014, has successfully completed a broad range of activities related to development of oxyfuel power plants. This paper provides an overview of key findings arising from the programme. It covers development of UK research pilot test facilities for oxyfuel applications; 2-D and 3-D flame imaging systems for monitoring, analysis and diagnostics; fuel characterisation of biomass and coal for oxyfuel combustion applications; ash transformation/deposition in oxyfuel combustion systems; materials and corrosion in oxyfuel combustion systems; and development of advanced simulation based on CFD modelling
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