1,555 research outputs found
An FFAG Transport Line for the PAMELA Project
The PAMELA project to design an accelerator for
hadron therapy using non-scaling Fixed Field Alternating
Gradient (NS-FFAG) magnets requires a transport line
and gantry to take the beam to the patient. The NS-FFAG
principle offers the possibility of a gantry much smaller,
lighter and cheaper than conventional designs, with the
added ability to accept a wide range of fast changing
energies. This paper will build on previous work to
investigate a transport line which could be used for the
PAMELA project. The design is presented along with a
study and optimisation of its acceptance
Needs analysis report following the sexual exploitation of children in Rotherham
It has been an immense honour to listen to
the experiences of the people of
Rotherham. The project team received a
warm welcome and felt humbled at the
extraordinary courage of victims, survivors
and their families. We wish to express our
heartfelt thanks to everyone who took part
in the study. The knowledge and opinions
shared by our participants are the
foundation of this report.
No-one wants to think about what child
sexual abuse and exploitation really
means. Recognising that children have
been humiliated, raped and tortured is
extremely distressing. As such, it is no
surprise that many felt anger and rage
when they understood that those with
authority failed to protect vulnerable
children and young people.
There is a need to face the awful reality that
child sexual abuse has always happened.
However, in the age of the internet, the
number of children at risk of sexual abuse
has increased. Those who sexually abuse
children are mostly, but not always, men.
Not discounting the vast number of boys
who have suffered abuse, most of the
known victims of sexual abuse are girls.
Both victims and perpetrators come from
every walk of life. The threat is such that we
all have a responsibility to consider what
we can do to protect every child in our
family and communities.
The public criticism of Rotherham
Metropolitan Borough Council (RMBC) and
South Yorkshire Police, following Professor
Jayâs report was right and inevitable.
Positively, there have been several
examples of how RMBC and South
Yorkshire Police have responded to
criticism and improved the way they
respond to victims and survivors. However,
there have also been negative
consequences of public scrutiny, with many
people in the study reporting that they want
to regain pride in their hometown.
Those who took part in this study did not
shy away from exploring the difficulties they
face. Naturally, participants continue to talk
about issues of trust, as past mistakes
created a sense of vulnerability. However,
there is also evidence that healing is taking
place. Many participants made suggestions
of how they and RMBC could and should
collaborate to strengthen, individuals,
families and their communities
Indeed, there is a determination to meet
current and future needs with a sense of
collective rigour. Some of these tasks
involve developing internal structures, such
as communication and the provision of
appropriate resources. Rotherham, like
many other towns and cities in Britain, is
also faced with external threats which can
exacerbate internal challenges. An
example of this is how recognition of the
involvement of some men of Asian
Pakistani heritage, in the abuse of children
in Rotherham, led some political groups to
capitalise on fears. However, it is clear that
children are best protected in resilient
families and communities. Thankfully,
Rotherham and its people continue to
demonstrate resilience.
In addition, there is also a strong sense of
realism, no-one in Rotherham expects
perfection, but they do expect to do
everything possible to protect children and
young people. One woman made the
distinction between surviving and thriving:
ââŠI donât want to survive,
I want to thriveâŠâ
We hope this report contributes to that aim
and welcome your views on the findings
from data collected between April and
June 2015. We recognise that the data is
reflective of views expressed at that time
and that RMBC and the people of
Rotherham, have continued to respond to
needs throughout the course of this
analysis process
Pamela: development of the RF system for a non-relativistic non-scaling FFAG
The PAMELA project(Particle Accelerator For MEdical
Applications) currently consists of the design of a particle
therapy facility. The project, which is in the design phase,
contains Non-Scaling FFAG, particle accelerator capable
of rapid beam acceleration, giving a pulse repetition rate of
1kHz, far beyond that of a conventional synchrotron. To
realise the repetition rate, a key component of the accelerator
is the rf accelerating system. The combination of a high
energy gain per turn and a high repetition rate is a significant
challenge. In this paper, options for the rf system of
the proton ring and the status of development are presented
The scattering of muons in low Z materials
This paper presents the measurement of the scattering of 172 MeV/c muons in
assorted materials, including liquid hydrogen, motivated by the need to
understand ionisation cooling for muon acceleration.
Data are compared with predictions from the Geant 4 simulation code and this
simulation is used to deconvolute detector effects. The scattering
distributions obtained are compared with the Moliere theory of multiple
scattering and, in the case of liquid hydrogen, with ELMS. With the exception
of ELMS, none of the models are found to provide a good description of the
data. The results suggest that ionisation cooling will work better than would
be predicted by Geant 4.7.0p01.Comment: pdfeTeX V 3.141592-1.21a-2.2, 30 pages with 22 figure
Solar Carbon Monoxide, Thermal Profiling, and the Abundances of C, O, and their Isotopes
A solar photospheric "thermal profiling" analysis is presented, exploiting
the infrared rovibrational bands of carbon monoxide (CO) as observed with the
McMath-Pierce Fourier transform spectrometer (FTS) at Kitt Peak, and from above
the Earth's atmosphere by the Shuttle-borne ATMOS experiment. Visible continuum
intensities and center-limb behavior constrained the temperature profile of the
deep photosphere, while CO center-limb behavior defined the thermal structure
at higher altitudes. The oxygen abundance was self consistently determined from
weak CO absorptions. Our analysis was meant to complement recent studies based
on 3-D convection models which, among other things, have revised the historical
solar oxygen (and carbon) abundance downward by a factor of nearly two;
although in fact our conclusions do not support such a revision. Based on
various considerations, an oxygen abundance of 700+/-100 ppm (parts per million
relative to hydrogen) is recommended; the large uncertainty reflects the model
sensitivity of CO. New solar isotopic ratios also are reported for 13C, 17O,
and 18O.Comment: 90 pages, 19 figures (some with parts "a", "b", etc.); to be
published in the Astrophysical Journal Supplement
Vortex Dynamics in Dissipative Systems
We derive the exact equation of motion for a vortex in two- and three-
dimensional non-relativistic systems governed by the Ginzburg-Landau equation
with complex coefficients. The velocity is given in terms of local gradients of
the magnitude and phase of the complex field and is exact also for arbitrarily
small inter-vortex distances. The results for vortices in a superfluid or a
superconductor are recovered.Comment: revtex, 5 pages, 1 encapsulated postscript figure (included), uses
aps.sty, epsf.te
Approximate Quantum Cloning with Nuclear Magnetic Resonance
Here we describe a Nuclear Magnetic Resonance (NMR) experiment that uses a
three qubit NMR device to implement the one to two approximate quantum cloning
network of Buzek et al.Comment: 4 pages RevTeX4 including 5 postscript figures. Submitted to PR
Conceptual design of a nonscaling fixed field alternating gradient accelerator for protons and carbon ions for charged particle therapy
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articleâs title, journal citation, and DOI.The conceptual design for a nonscaling fixed field alternating gradient accelerator suitable for charged particle therapy (the use of protons and other light ions to treat some forms of cancer) is described.EPSR
Outcomes from the Children and Young Peopleâs Advocacy House Consultation Event â MediaCityUK
Improving Predictions for Helium Emission Lines
We have combined the detailed He I recombination model of Smits with the
collisional transitions of Sawey & Berrington in order to produce new accurate
helium emissivities that include the effects of collisional excitation from
both the 2 (3)S and 2 (1) S levels. We present a grid of emissivities for a
range of temperature and densities along with analytical fits and error
estimates.
Fits accurate to within 1% are given for the emissivities of the brightest
lines over a restricted range for estimates of primordial helium abundance. We
characterize the analysis uncertainties associated with uncertainties in
temperature, density, fitting functions, and input atomic data. We estimate
that atomic data uncertainties alone may limit abundance estimates to an
accuracy of 1.5%; systematic errors may be greater than this. This analysis
uncertainty must be incorporated when attempting to make high accuracy
estimates of the helium abundance. For example, in recent determinations of the
primordial helium abundance, uncertainties in the input atomic data have been
neglected.Comment: ApJ, accepte
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