179132452
The EMU user guide
119768726
Towards a Dedicated High-Intensity Muon Facility
We discuss possible designs for a high-intensity, stand-alone muon source dedicated to and fully optimised for μSR studies. In particular, we focus upon the potential implementation of a new generation of high-power, but relatively compact and cost effective, proton drivers based on non-scaling fixed-field alternating gradient (ns-FFAG) accelerator technology. Initial considerations suggest that a facility with multiple optimised pion targets, each affording positron count rates approximately two orders of magnitude higher than existing pulsed muon sources, together with the potential of steady state operation at count rates comparable to the best existing sources, should be achievable at reasonable cost. The relative merits of a stand-alone muon facility with respect to those of current facilities which operate in symbiotic mode with other users of the proton driver are highlighted. The outstanding technical issues which must be addressed by both muon scientists and accelerator technologists are also considered.
13897164
Geometry Optimization of the ISIS Muon Target
ISIS is the world’s most successful pulsed spallation 
neutron source that provides beams of neutrons and muons 
that enable scientists to study the properties of the matter at 
the atomic level. Restrictions are imposed on the muon target 
regarding thickness as this will affect the proton transmission 
to the second neutron target. However, it could 
be possible to improve the muon production by optimizing 
the target geometry. Currently the muon target is a 7 mm 
thick graphite plate oriented at 45 degrees with respect to 
the proton beam. A set of slices placed at variable distance 
is proposed instead of the 7 mm thick graphite target. The 
performance of the set of slices is examined in this paper
433803
Exploring the feasibility of a stand alone muon facility for muSR research
The current paper discusses possible designs for a high 
intensity stand alone muon source formuSR studies of condensed 
matter. In particular we shall focus upon the potential 
implementation of a new generation of high power but 
relatively compact and cost effective proton drivers based 
on non-scaling fixed field alternating gradient (ns-FFAG) 
accelerator technology. The technical issues which must 
be addressed are also considered.
2407099
Impact of the Energy of the Proton Driver on Muon Production
Simulations studies have been carried out to examine the 
impact of the energy of the proton driver on muon production. 
The muon flux is calculated as a function of proton 
energy over a wide range, which covers the energies at the 
existing muon and neutron facilities worldwide. The muon 
and higher energy pion yields are normalised per beam current 
and accelerator power. The case of a higher energy of 
the proton driver at the ISIS muon facility is also examined.
6945786
GEANT4 VALIDATION STUDIES AT THE ISIS MUON FACILITY
GEANT4 provides an extensive set of alternative 
hadronic models. Simulations of the ISIS muon production 
using three such models applicable in the energy range 
of interest are presented in this paper and compared with 
the experimental data.
103822523
SPIN STRUCTURE FUNCTIONS OF THE PROTON AND DEUTERON FROM SLAC EXPERIMENTS E155 AND E155X
Experiments E155 and E155X at SLAC were polarized deep inelastic scattering measurements of the parallel and perpendicular scattering asymmetries. We extracted the polarized structure functions g1 and g2 of the proton and deuteron. Both experiments made precision measurements through a wide range in x and Q 2 . These data fall into the kinematic range between existing world data and have good consistency with them. In combination with the other world data, the results for g1 allow increased constraint on NLO QCD ts to the polarized structure functions. For g2 no signicant world data existed before E155X. The E155X measurement provides information about the higher twist eects in the nucleon.
1684890
Stabilized High Power Laser for Advanced Gravitational Wave Detectors
Second generation gravitational wave detectors require high power lasers with several 100 W of output power and with very low temporal and spatial fluctuations. In this paper we discuss possible setups to achieve high laser power and describe a 200 W prestabilized laser system (PSL). The PSL noise requirements for advanced gravitational wave detectors will be discussed in general and the stabilization scheme proposed for the Advanced LIGO PSL will be described. Special emphasis will be given to the most demanding power stabilization requiremets and new results (RIN ≤ 4×10 −9 / √ Hz) will be presented.