Mr
Martin Fertl
(Paul Scherrer Institut)
10/09/2013, 18:00
Poster
e present a frequency lock for a DUV frequency-quadrupled diode laser system based on the sub-Doppler DAVLL (dichroic atomic vapor laser lock) technique applied to the \SI{253.7}{\nano\meter} transition in mercury. The laser system is part of a free induction decay magnetometer based on the optical detection of nuclear magnetic resonance (ODMR) in a spin polarized ensemble of $^{199}$Hg atoms....
Dr
David Taqqu
(ETH Zürich)
10/09/2013, 18:00
Poster
As presented in another contribution to this workshop an intense low energy positive muon source is being investigated at PSI. With a transverse extension of a a few tenths of a mm and an average energy of 1 eV it should provide after acceleration a precisely timed beam with an ultimate intensity near 10^6 muons/sec. Its application to a precise g-2 experiment makes use of a novel concept...
Kyle Grammer
(University of Tennessee)
10/09/2013, 18:00
Poster
Liquid hydrogen is commonly used as a neutron moderator and accurate knowledge of the scattering cross section is critical for the design of cold sources. The total cross section for cold neutrons with wavelengths between 2.3 and 14A has been measured for liquid hydrogen at 15.7K. Provided that the orthohydrogen concentration in the target vessel is at the thermodynamic equilibrium limit and...
Dr
Naritoshi Kawamura
(KEK)
10/09/2013, 18:00
Poster
Since the first beam in 2008, Muon Facility, J-PARC (MUSE) has been operated, and the beam intensity reached at the 3E+6/s, the most intense pulsed muon beam in the world, under 200-kW proton beam.
From the 2-cm thick graphite target, four secondary muon beam lines are able to be extracted to the experimental areas.
A new beam line is planed to be constructed.
This beamline is designed to...
Mr
Christian Düsing
(University Mainz)
10/09/2013, 18:00
Poster
The uncertainty of the value of the neutron lifetime was raised from 0.8 seconds to 1.1 seconds due to three new wall storage experiments whose results were taken into account. To support solving this “Puzzle of Neutron Lifetime” we are preparing an UCN-wall storage experiment with a novel wall coating. We were able to obtain and analyze a perfluorinated polymer as proposed by Pokotilovski in...
Ms
Miki Nishimura
(The University of Tokyo)
10/09/2013, 18:00
Poster
The MEG experiment recently improved the upper limit on the Branching Ratio of the of $\mu$ $\rightarrow$ e$\gamma$ decay to BR<5.7×10^(-13). Now we are upgrading the MEG experiment with the goal of one order of magnitude improvement of the sensitivity by improving the detector resolution and increasing its efficiency.
An improved resolution in positron time measurement will result in a...
Dr
Zoran Grujić
(University of Fribourg, Department of Physics)
10/09/2013, 18:00
Poster
For many years the central focus of atomic magnetometer development has been towards an increase in sensitivity while the aspect of absolute accuracy in the field measurement has received less attention. Here we present measurements made with a novel atomic magnetometry scheme based on the detection of the free induction decay of a spin-oriented Cs vapour which, together with a three beam...
Mr
Hans-Christian Koch
(University of Mainz / University of Fribourg)
10/09/2013, 18:00
Poster
Many experiments in fundamental science, such as the search for the neutron electric dipole moment (nEDM) at PSI, Switzerland, demand an accurate measurement and control of an applied magnetic field. Here, we describe a combined 3He-Cs magnetometer for the absolute measurement of a µT magnetic field with a precision of better than 10^-6. The magnetometer detects the weak oscillating magnetic...
ATLAS Collaboration ATLAS Collaboration
(ATLAS)
10/09/2013, 18:00
Poster
After successful LHC operation at the center-of-mass energy of 7 and 8
TeV in 2011 and 2012, plans are actively advancing for a series of
upgrades, culminating roughly 10 years from now in the high luminosity
LHC (HL-LHC) project, delivering of order five times the LHC nominal
instantaneous luminosity along with luminosity levelling. The final
goal is to extend the data set from about few...
Dr
Malgorzata Kasprzak
(University of Fribourg)
10/09/2013, 18:00
Poster
Atomic magnetometers are high precision detectors used for magnetic field measurement in many applications, including experiments testing fundamental symmetries in which knowledge of the magnetic field is essential. One such experiment is the search for the electric dipole moment of the neutron, a version of which is located at the new ultracold neutron source of the Paul Scherrer Institut in...
Mr
Romain MAISONOBE
(Institut Laue-Langevin)
10/09/2013, 18:00
Poster
The retardation spectrometer aSPECT measures the proton recoil spectrum in free neutron β-decay with high precision. From this spectrum the electron-antineutrino angular correlation coefficient a can be extracted and used to derive the ratio λ = gA / gV of the weak coupling constants. For this high precision measurement, a good understanding of the background is indispensable.
In 2012 the...
Dr
Gergelj Soti
(IKS, Katholieke Universiteit Leuven)
10/09/2013, 18:00
Poster
The β-asymmetry parameter A for the pure Gamow-Teller decay of 67Cu was measured by the low temperature nuclear orientation method. A 3He-4He dilution refrigerator cooled down to milliKelvin temperatures an iron sample foil into which the radioactive nuclei were implanted. An external magnetic field of 0.1 T in combination with the internal hyperfine magnetic field oriented the nuclei. The...
Mr
Victor HELAINE
(PSI/LPC Caen)
10/09/2013, 18:00
Poster
The Standard Model (SM) of Particle Physics predicts a neutron Electric Dipole Moment (nEDM) several orders of magnitude below the current best experimental limit $d_n < 2.9\times 10^{-26}$ e.cm (90$\%$ CL \cite{Baker}). The nEDM breaks both Time Reversal and Parity symmetry. Many extensions of the SM predict nEDM values at the level of the current experimental sensitivity. Thus, the nEDM...
Mr
Kim Siang Khaw
(ETH Zurich)
10/09/2013, 18:00
Poster
Several next generation precision measurements like muonium (Mu=$\mu^{+}e^{-}$) spectroscopy, (g-2)$_{\mu}$, searches for $\textrm{Mu}$-$\overline{\textrm{Mu}}$ oscillations and muon ($\mu^{+}$) electric dipole moment can be conceived with improved $\mu^{+}$ and Mu beams.
The principle of the novel $\mu^{+}$ beam line proposed in PRL \textbf{97}, 194801 (2006) is to stop a standard...
Ryo Katayama
(The University of Tokyo)
10/09/2013, 18:00
Poster
The neutron electric dipole moment (nEDM) is sensitive to new physics beyond the standard model, and could provide a new source of CP violation. Several experiments are being planned around the world for its high precision measurement. In the measurement of the nEDM, the systematic uncertainties are due to the motion of the ultracold neutrons (UCNs), the geometry of measurement systems, and...
Dr
Kent Leung
(North Carolina State University)
10/09/2013, 18:00
Poster
A test apparatus is being developed for use at the ultracold neutron (UCN) source located at the 1 MW NCSU PULSTAR reactor. The goal is to study several critical aspects of the Spallation Neutron Source (SNS) neutron electric dipole moment (nEDM) experiment without the electric field. Detailed studies of the interactions between the 3He and the UCNs, measurements of the correlation functions...
Mr
Daisuke Kaneko
(University of Tokyo)
10/09/2013, 18:00
Poster
A major upgrade of the MEG experiment is planned. The liquid xenon gamma-ray detector will be upgraded by replacing a part of the current 2-inch PMTs by smaller photosensors such as silicon photomultipliers (SiPMs). The energy and position resolutions are expected to be improved due to better granularity, especially for the events where gamma-ray converts near the incident face.
An MPPC...
Mr
Romain Virot
(Institut Laue-Langevin)
10/09/2013, 18:00
Poster
The retardation spectrometer aSPECT was designed to measure the electron-antineutrino angular correlation a in free-neutron decay with high accuracy. This coefficient allows to determine the ratio of the weak coupling constants. In aSPECT, it is extracted from the proton recoil spectrum. After selection by a retardation potential, protons are accelerated to typically ~15keV and deposit up to...
Dr
Michael Hardiman
(University of Sussex)
10/09/2013, 18:00
Poster
In the CryoEDM experiment at ILL, magnetic resonance is performed on ultra-cold neutrons stored in superfluid helium at 0.6K. The sensitivity to an electric dipole moment is directly proportional to the strength of the E-field applied across the resonance cell. It has been suggested that the dielectric properties of liquid helium should permit the use of fields much higher than the ~10kV/cm...
Prof.
Anatolii Serebrov
(Petersburg Nuclear Physics Institute)
10/09/2013, 18:00
Poster
The project of experiment search for sterile neutrino will be presented. Results of preparations of the experiment at WWR-M reactor and plans of realization of the main experiment on the SM-3 reactor are discussed.
Andreas Knecht
(Paul Scherrer Institut)
10/09/2013, 18:00
Poster
Muons are an excellent tool for answering both fundamental and applied questions concerning the structure and properties of matter and consequently are in high demand at accelerator facilities. For material sciences, muon spin resonance techniques (muSR) are used to probe the magnetic structures of novel materials. In particle physics a number of fundamental measurements rely on the...
Mr
Christian Siemensen
(Institute of Nuclear Chemistry Mainz),
Daniel Brose
(University of Mainz)
10/09/2013, 18:00
Poster
We aim to probe the electric charge of the free neutron at a level of 10^-22 times the elementary charge. A possible neutron charge is related to the question of electric charge quantisation, which still remains unanswered by the standard model. Therefor, we developped a neutron optical system, based on a similar experiment in the late 80's (Borisov et al. 1987). This new setup is designed to...
Dr
Takeyasu Ito
(Los Alamos National Laboratory)
10/09/2013, 18:00
Poster
The SNS nEDM collaboration is developing an experiment to search for the neutron’s electric dipole moment (EDM), using ultracold neutrons (UCNs) stored in superfluid liquid helium, to be run at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. In this experiment, being able to achieve a strong and stable electric field in superfluid liquid helium in the region where UCNs...
Mr
Felix Rosenau
(ILL)
10/09/2013, 18:00
Poster
The lifetime of the free neutron is a key quantity for primordial nucleosynthesis, calculation of experimentally inaccessible weak cross sections and for tests of the standard model of particle physics. During past decades, continuous efforts have been made to measure its value with increasing precision, predominantly using cold neutron beams or by trapping ultra cold neutrons (UCN) in...
Mr
Alexander Wunderle
(Institute of Physics, Uni Mainz)
10/09/2013, 18:00
Poster
With the retardation spectrometer aSPECT we aim to determine the beta-neutrino angular coefficient a in free neutron decay with high precision. Using this measurement the weak coupling constants gA/gV can be determined and therefore the Standard Model can be tested. To reach this high precision, the systematic uncertainties have also to be known with high precision.
In the past years several...
Mr
Christian Schmidt
(Institute of Physics, University of Mainz)
10/09/2013, 18:00
Poster
Low energy, high precision experiments have become an important branch for the investigation and the search for physics beyond the Standard Model of particle physics. Two examples of such experiments are aSPECT, which is designed to determine the electron antineutrino angular correlation coefficient a in free neutron beta-decay, and KATRIN, which will determine or set a significantly improved...
Dr
Stuart Ingleby
(Sussex University)
10/09/2013, 18:00
Poster
The CryoEDM experiment will carry out a precision measurement of
the neutron electric dipole moment (EDM) at the ILL reactor facility
in Grenoble. Neutron EDM is a parameter sensitive to a wide range
of BSM theories addressing CP symmetry in the strong sector. EDM
measurement on ultra-cold neutrons (UCN) is conditional on
stringent magnetic field conditions, which present a range of...
Dr
Geza Zsigmond
(Paul Scherrer Institut)
10/09/2013, 18:00
Poster
One important aspect of the study of systematic effects in room-temperature (RT) nEDM is the center of mass offset of the stored ultracold neutrons (UCN) due to gravity and the Larmor frequency shift connected to it.
We will present simulation results on such a shift and on the transversal depolarization time (T2) of the UCN (affecting sensitivity) as a function of realistic magnetic fields...
Dr
Jonathan Mulholland
(University of Tennessee)
10/09/2013, 18:00
Poster
The decay of the free neutron is the simplest nuclear beta decay and is the prototype for charged current semi-leptonic weak interactions. A precise value for the neutron lifetime is required for consistency tests of the Standard Model and is an essential parameter in the theory of Big Bang Nucleosynthesis. A new measurement of the neutron lifetime using the in-beam method is planned at the...
Dr
Gertrud Konrad
(TU Wien, Atominstitut)
10/09/2013, 18:00
Poster
Experiments with neutrons address important questions in nuclear and particle physics, astrophysics and cosmology, as well as gravitation. These experiments include precision measurements of the parameters describing the beta decay of free neutrons. Here, the main emphasis is on the search for evidence of possible extensions of the Standard Model of elementary particles and fields. Such...
Dr
Jiro Kawada
(Bern University)
10/09/2013, 18:00
Poster
This work aims at collecting experimental data on low energy antiproton-nucleus annihilation - especially on nuclear fragmentation - by using emulsion detectors.
In spite of their importance in many fields such as nuclear physics, astronomy and radiology, the properties of stopping antiprotons, in particular the energy distributions, the multiplicities and the particle types emitted by the...
Michael Wohlmuther
(Paul Scherrer Institut)
10/09/2013, 18:00
Poster
Results of numerical calculations and the experimental characterization of the neutron flux profile at the ultracold neutron (UCN) source of the Paul Scherrer Institut (PSI) are presented. At first, the MCNPX-based model of the Monte-Carlo simulation with its detailed description of the so-called ``Cannelloni''-type spallation target assembly and the realistic proton beam profile modeling is...
Dr
Christopher Crawford
(University of Kentucky)
10/09/2013, 18:00
Poster
Because the neutron has only a single static moment--the magnetic dipole, virtually every fundamental neutron physics experiment relies on static and/or oscillating magnetic fields to manipulate the neutron spin and/or kinematics. The level of precision required for modern experiments places stringent constraints on field uniformity, fringes, geometry, magnetic materials, and shielding, which...
Ms
Amy Cottle
(University of Oxford)
10/09/2013, 18:00
Poster
Accurate monitoring of magnetic fields is crucial for neutron electric dipole experiments to reach limits of d~10-27ecm and below. The requirements of precision magnetometers in such experiments is discussed, with particular emphasis on the SQUID-based magnetometer developed for CryoEDM. A description of this 12-SQUID system, designed to track fields at the 0.1pT level, and the technical...
Mr
Hanno Filter
(Atominstitut TU Wien)
10/09/2013, 18:00
Poster
The electric charge of the Neutron is one of the last parameters in the standard model of particle physics, that can‘t be derived out of the accepted theoretical framework. Thus for refining the existing model and to exclude extensions to the same, it is necessary to measure the value of the electric charge to an high precision and accuracy.
With our Gravity Resonance Spectroscopy technique...
Mr
Mathieu Guigue
(Laboratoire de Physique Subatomique et de Cosmologie)
10/09/2013, 18:00
Poster
Many proposed extensions of the Standard Model of particle physics predict the existence of weakly interacting slim (sub-eV) particles (WISP). As WISPs are naturally Dark Matter candidate, they are actively search for using a great variety of experimental methods. Since WISPs are light particles, they could mediate a new interaction between ordinary particles with a macroscopic range. If the...
Dr
Ruediger Picker
(TRIUMF)
10/09/2013, 18:00
Poster
Most (if not even all) experiments with ultra-cold neutrons (UCN)
currently under development need higher UCN densities than presently available. There are multiple efforts world wide to achieve an increase of up to three orders of magnitude in the storable number of UCNs. Different combinations of neutron source and UCN convertor are used by the various groups.
Neutrons either come from a...
Davide Reggiani
(Paul Scherrer Institut),
Konrad Deiters
(Paul Scherrer Institut)
10/09/2013, 18:00
Advanced muon and ultracold neutron sources
Poster
During the last 2 years we customized the PiE1 and the PiE3 beam lines. The PiE1 beam line is used by the µSR and the particle physics community. The reorganization from one user to another was a time and labor consuming process. We installed an additional bending magnet and additional quadruples. Thus we can now switch within a few days between different users. PiE3 was completely rebuilt to...
Gunther Cronenberg
(Atominstitut, Vienna University of Technology)
10/09/2013, 18:00
Poster
We present observations of transitions between quantum states of gravitationally bound neutrons using a three-part Rabi resonance spectroscopy setup.
In our experiments, ultra-cold neutrons are trapped in the gravitational field of the Earth. Quantum interferences between different states are observed by inducing transitions by mechanical vibration. The latest improvement, omitting the upper...
Dr
Hajime NISHIGUCHI
(KEK)
10/09/2013, 18:00
Poster
The COMET Experiment at J-PARC aims to search for a lepton-flavour violating process of muon to electron conversion in a muonic atom with a branching-ratio sensitivity of better than 10^{−16} in order to explore the parameter region predicted by most of well-motivated theoretical models beyond the Standard Model. The need for this sensitivity places several stringent requirements on both the...
Cristina Lazzeroni
(University of Birmingham, UK)
10/09/2013, 18:00
Poster
The decay K+ -> pi+ nu nu-bar is highly suppressed in the Standard Model (SM), while its rate can be predicted with minimal theoretical uncertainty. The branching ratio for this decay is thus a sensitive probe of the flavor sector of the SM.; however, the smallness of this BR (8 x 10^-11) and challenging experimental signature make it very difficult to measure. The primary goal of the NA62...
Dr
Paolo Crivelli
(ETH Zurich, Institute for Particle Physics)
10/09/2013, 18:00
Poster
In the Standard Model (SM) there are several canonical examples of purely leptonic processes involving the muon, the electron and the corresponding neutrinos which are connected by the crossing
symmetry: i) the decay of muon, ii) the inverse muon decay and iii) the annihilation of a muon and an electron into two neutrinos.
Although the first two reactions have been observed and measured...
Dr
Camille Theroine
(ESS)
10/09/2013, 18:00
Poster
The European Spallation Source (ESS) will provide to the scientific community new opportunities of research using neutrons. Indeed, the unique capabilities of the ESS, namely the high peak flux of the neutron beam and the inherent time structure of the beam, will permit to push the frontiers of neutron sciences.
These properties will be very useful for many fundamental physics experiments....
Mr
Damien Roulier
(Institut Laue Langevin, Grenoble, France and Universite Joseph Fourier, Grenoble, France)
10/09/2013, 18:00
Poster
The GRANIT instrument is designed to study quantum states of Ultra Cold Neutrons (UCNs) bouncing over a mirror in the gravitational field.
The UCNs are produced by a dedicated superthermal helium source installed at the ILL reactor.
The storage time in the source and the velocity spectrum of extracted neutrons have been recently measured, the source is now connected to the GRANIT...
Dr
Gergelj Soti
(IKS, KU Leuven)
10/09/2013, 18:00
Poster
Precision correlation measurements in nuclear beta decay searching for new types of weak interactions, have now reached precisions of the order of 1 % and better [Sev2013, Nav2013]. At this level of precision Standard Model higher-order effects in the vector and axial-vector weak currents should be taken into account. The most significant of these is the so-called weak magnetism originating...
Mr
Prashanth Pataguppi
(Paul Scherrer Institute)
10/09/2013, 18:00
Searches for symmetry violations
Poster
In order to reach in the neutron EDM experiment using ultra cold neutrons at the Paul Scherrer Institute (PSI) the desired sensitivity goal of 5 x 10^(-27)e.cm (95 % C.L.), the systematic uncertainties must be smaller than 1.3 x 10^(-27)e.cm . A crucial requirement is the control of the fluctuations of a magnetic field on a level of better than hundred fT. Optically pumped cesium...
Dr
Tobias Jenke
(Universitätsassistent)
10/09/2013, 18:00
Poster
Newton’s Inverse Square Law of Gravity may be tested at micron distances deeply into the theoretically interesting regime by quantum interference with ultracold neutrons. Our newly developed method is based on a resonance spectroscopy technique related to Rabi spectroscopy, which has been adapted to gravitationally bound quantum systems: By coupling such a quantum system to mechanical...
Dr
Takatoshi Aoki
(University of Tokyo)
10/09/2013, 18:00
Poster
Exploring an electron's electric dipole moment (e-EDM) is one of the most fundamental problems in physics. Sensitivity of EDM measurement can be enhanced using heavy polar molecules which has the stronger electric field inside the molecules than that achieved in laboratory. We suggested an alternative approach to prepare the ultracold molecules produced by associating laser cooled two-species...
