Conveners
Poster 1
- Marc Schumann (Univertity of Freiburg)
Ken'ichi Saikawa
(Max Planck Institute for Physics)
04/06/2019, 14:15
Poster
Standard Model-Axion-Seesaw-Higgs portal inflation (SMASH) is a minimal extension of the Standard Model that provides a solution to five problems of particle physics and cosmology (inflation, baryon asymmetry, neutrino masses, strong CP problem, and dark matter) in one stroke. An important prediction of this model is the existence of a significant amount of primordial gravitational waves (GWs)...
Dr
Li-Wei Wei
(AEI Hannover)
04/06/2019, 14:20
Poster
Any Light Particle Search (ALPS) is a series of laboratory light-shining-through-a-wall experiments seeking light-weight sub-eV dark matter candidates including the well-motivated axion-like-particles (ALPs). To extend the experiment sensitivity into scientifically interesting parameter space in terms of ALP-photon coupling, in addition to using long dipole magnets from HERA, ALPS-II...
Ms
Wei Wu
(Imperial College London)
04/06/2019, 14:25
Poster
A recent experiment on the Gemini laser facility at the Rutherford Appleton Laboratory collided intense beams of high-energy photons (~500 MeV) with a dense X-ray eld (~1.5 keV) to investigate the final QED process involving photons which has not been directly observed, the Breit-Wheeler process. The BW process has been well studied in QED so we are exploring how to use the results of these...
Mr
Kaan Ozbozduman
(Bogazici University & CERN), Mr
Marios Maroudas
(University of Patras)
04/06/2019, 14:30
Poster
CAST-CAPP detector project is searching for dark matter axions, in the range of 21 to 25μeV, using tunable rectangular microwave cavities installed in the 43mm twin-bore, 9T, CAST dipole magnet. In December 2018, one of the four identical cavities was operated at constant frequency of ~5.40 GHz and obtained 135 hours of preliminary data with ~25 MHz bandwidth. Data processing and analysis...
Dr
David Tanner
(University of Florida)
04/06/2019, 14:35
Poster
An upgrade to the Axion Dark Matter eXperiment (ADMX) will extend its high sensitivity search for QCD axions up to axion masses of 40 $\mu$eV. Axions are especially significant as dark matter if their mass is of order 2--40 $\mu$eV. They would then make up the dark-matter halos of galaxies. These halo axions may be detected by the Sikivie process, by which they decay to photons through the...
Mr
Graeme Flower
(University of Western Australia)
04/06/2019, 14:40
Poster
Ferromagnetic axion haloscopes search for axion dark matter by exploiting their coupling to electrons. We present a new theoretical framework by which such devices can be understood with a Hamiltonian approach using strongly coupled cavity photons, and magnons from a spherical ferrimagnet. Particular focus is put of the operation of these devices in the dispersive regime, which allows these...
Mr
Tobias Schiffer
(Universität Bonn)
04/06/2019, 14:45
Poster
In the scope of the search for axions and axion like particles (Alps) a detector especially built for low energy X-rays based on the GridPix technology was developed at the University of Bonn. The GridPix is a MicroMegas like readout consisting of a pixelized readout ASIC (Timepix) with a perfectly aligned gas amplification stage, which is photolithographically built on top of the ASIC....
Mr
Nicolò Crescini
(University of Padua - INFN-LNL)
04/06/2019, 14:50
Poster
The search of dark matter in the form of Axions, extremely light and weakly interacting particles, can be performed with detectors called haloscopes. These setups usually test the coupling of Axions with photons, but recently ferromagnetic haloscopes have been proposed to probe the interaction of Axions with the electrons of a magnetic material [1].
The QUAX experiment aims at implementing...
Andrew Sonnenschein
(Fermilab)
04/06/2019, 14:55
Poster
Axion haloscopes based on the resonant cavity technique require large and larger arrays of cavities to maintain signal power as frequency increases. For large numbers of cavities, tuning the cavity resonant frequency with mechanical actuators becomes difficult, especially at temperatures below 100 mK. We propose the use of non-linear dielectric crystals such as Strontium Titanate to tune large...
Mr
Stefan Knirck
(Max-Planck-Institute for Physics)
04/06/2019, 15:00
Poster
The MADMAX experiment is aimed to directly detect dark matter axions
with masses between $40\,\mu{\rm eV}$ and $400\,\mu{\rm eV}$ by using
their conversion to photons at boundaries between materials of different
dielectric constants under a strong magnetic field. Combining many such
surfaces, this conversion can be significantly enhanced using
constructive interference and resonances. We...
Mr
Cristian Cogollos
(ICCUB (Institut de Ciències del Cosmos - Universitat de Barcelona))
04/06/2019, 15:05
Poster
New radiopure electronics for the Micromegas detector to be used in the future BabyIAXO helioscope is proposed based on the FEC-Feminos and AGET ASIC from Saclay due to their long tragectory of collaboration and proven functionaly as in CAST experiment. The modular readout will be divided in two stages. The first part of the electronics is composed of 4 Front End Cards (FEC) with one AGET chip...
Mr
Jose María García Barceló
(Universidad Politécnica de Cartagena)
04/06/2019, 15:10
Poster
Progress on the possibilities for implementing frequency tuning and increasing the volume of RADES (*Relic Axion Detector Exploratory Setup*) axion search cavities are described. The cavities works at X-Band and consist of inter-coupled sub-cavities. A first 5 cavity prototype split into two halves has been manufactured and provides a tuning range of 700 MHz by varying the distance of the two...
Dr
Madalin-Mihai Rosu
(Extreme Light Infrastructure - Nuclear Physics)
04/06/2019, 15:15
Poster
Search for sub-eV Dark Matter candidates at E4 (RA5-DM) looking for frequency shifted photons via four-wave mixing in the vacuum caused by stimulated decay of resonantly produced DM when two color lasers are combined and focused into the vacuum at ELI-NP facility
Mr
Kanioar Karan
(Max-Planck-Institut für Gravitationsphysik / Leibniz Universität Hannover)
04/06/2019, 15:20
Poster
The Any Light Particle Search (ALPS II) is a Light-Shining-Through-a-Wall experiment which will use optical cavities to enhance the oscillation of photons into Axion-like particles (ALPs) and vice-versa. We set up a 1-m-prototype table-top experiment to test and develop subsystems for the finale ALPS II experiment. We will give an overview of this experiment and its current status.
Jessica Golm
(CERN)
04/06/2019, 15:25
Poster
Many experiments all over the world search for Axions in different mass ranges. The Relic Axion Detector Experimental Setup (RADES) uses microwave filters as detectors which are in theory able to scan a mass range of 10 to 100 $\mu$eV. A typical RADES filter consists of N sub-cavities coupled by rectangular irises. They are installed at CAST in a bore of a powerful decommissioned LHC 9 T...
Jan schuette-engel
(Uni Hamburg)
04/06/2019, 15:30
Poster
The presence of axions modifies the Maxwell equations. This is exploited by many axion direct detection search experiments. Feasibility studies and optimizations of the experiment require computing the E-fields in 3D. Using finite element methods (FEM) in full 3D this is computationally very expensive and time consuming.
We present two techniques to compute the 3D E-field solutions for open...
Dr
David Tanner
(University of Florida)
04/06/2019, 15:35
Poster
The Any Light Particle Search (ALPS) II is an experiment designed to search for weakly interacting sub-eV particles that couple to photons in the presence of a magnetic field. In order to detect the extremely weak photon fields associated with the existence of such hypothetical particles, the detector employed needs to be sensitive to power levels equivalent to a few photons per week. The ALPS...
Mr
Aleksandr Chatrchyan
(Heidelberg University, Institute for theoretical physics)
04/06/2019, 15:40
Poster
Axion-like particles (ALP) are promising candidates for dark matter, if produced via the misalignment mechanism. In the presence of a monodromy the discrete shift symmetry of ALPs is explicitly broken. This can lead to a rapid growth of fluctuations during the early stages of vacuum realignment, even if the field is initially homogeneous. We describe the production of stochastic gravitational...
Mr
Evgeniy Unzhakov
(Petersburg Nuclear Physics Institute)
04/06/2019, 15:45
Poster
The modern theoretical models of ``invisible'' axion describe its interaction with ordinary matter in terms of effective coupling with nucleons ($g_{AN}$), electrons ($g_{Ae}$) and photons ($g_{A\gamma}$).
Axion coupling to atomic nuclei ($g_{AN}$) makes it possible for axions to be resonantly emitted or absorbed during the nuclear transitions of magnetic-type.
Particular isotopes...
Mr
Arnaud Andrianavalomahefa
(Karlsruhe Institute of Technology)
04/06/2019, 15:50
Poster
The FUNK (Finding $U(1)$s of Novel Kind) experiment was built to search direct
evidences for hidden-photon (HP) dark-matter. We use a $15\,\mathrm{m}^2$ spherical
metallic mirror as a HP-to-photon converter via Maxwellian-like transition.
Signals are expected to come together as single photon events at the radius
point where we mounted a low-noise photomultiplier.
We scanned the whole...
