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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191107T120000
DTEND;TZID=Europe/Berlin:20191107T130000
DTSTAMP:20260417T145535
CREATED:20191017T125521Z
LAST-MODIFIED:20191017T125521Z
UID:2794-1573128000-1573131600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Sebastian Böser
DESCRIPTION:Project 8 – towards a radio frequency measurement of the neutrino mass\nWhile neutrino flavour oscillations are a clear indication that neutrinos do have non-vanishing rest masses\, their values have so far not been established experimentally. The state-of-the-art experiment KATRIN has recently set a limit for the effective electron neutrino mass at mβ < 1.1 eV/c² @ 90%CL. However\, cosmological observations indicate that Σm𝜈 < 0.12eV/c²\, well below KATRINs final projected sensitivity at m_𝜈 < 0.2 meV/c². As the MAC-E filter technology employed in KATRIN can not be scaled easily\, new technologies are required to measure the neutrino mass in the lab. Towards this goal\, the Project 8 collaboration has established Cyclotron Radiation Emission Spectroscopy as a new experimental method. In a four phased approach\, this technique is employed in precision endpoint spectroscopy on tritium. For the final stage of the experiment\, an atomic tritium setup is envisioned that allows a sensitivity of m_𝜈 < 0.04 meV/c²
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-sebastian-boser/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191205T120000
DTEND;TZID=Europe/Berlin:20191205T130000
DTSTAMP:20260417T145535
CREATED:20191022T130053Z
LAST-MODIFIED:20191022T130053Z
UID:2808-1575547200-1575550800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Eckhard Sturm
DESCRIPTION:The core of the matter – spatially resolving the nuclei of Active Galaxies with VLTI/GRAVITY\nOne of the most exciting opportunities offered by the new VLT beam combiner GRAVITY is to directly resolve the immediate regions around the super-massive black holes (SMBHs) in the centres of active galaxies (AGN)\, i.e. the Broad Line Region (BLR) and the hot dust (“torus”) structures. We are exploiting this capability to study the inner workings of AGN in the K-band on unprecedented micro-arcsecond (sub-pc) spatial scales. This has led to the first interferometric detection of a BLR (finding ordered rotation and measuring the black hole mass in the quasar 3C273)\, as well as to the first 0.2 parsec resolution K-band image of the dust sublimation region in the nucleus of the Seyfert 2 galaxy NGC1068 (finding a ring-like structure which is inconsistent with the expected signatures of a geometrically and optically thick torus). After a short introduction to the GRAVITY instrument and the principles of interferometry with GRAVITY\, I will summarize these and other recent results\, discuss their scientific (and historical) context\, and give an outlook how such observations might contribute to the study of the structures and physical processes around SMBHs or to the study of how SMBHs build up their mass across cosmic time.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-eckhard-sturm/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20191212T120000
DTEND;TZID=Europe/Berlin:20191212T130000
DTSTAMP:20260417T145535
CREATED:20191017T130203Z
LAST-MODIFIED:20191017T130203Z
UID:2798-1576152000-1576155600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Jörg Hörandel
DESCRIPTION:Measuring the properties of cosmic rays with the radio technique\nThe radio emission from air showers is now routinely detected to measure the properties of cosmic rays. An overview is given on recent experimental activities\, including observations with the LOFAR radio telescope and the Auger Engineering Radio Array at the Pierre Auger Observatory. Recent results will be discussed. We will give an outlook on our ongoing project to equip all surface detectors of the Auger observatory with radio antennas\, forming a 3000 km2 radio array.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-jorg-horandel/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200109T120000
DTEND;TZID=Europe/Berlin:20200109T130000
DTSTAMP:20260417T145535
CREATED:20191017T130525Z
LAST-MODIFIED:20191017T130525Z
UID:2800-1578571200-1578574800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Klaus Desch
DESCRIPTION:Axions from Sun? Exploring the low-energy frontier with the IAXO experiment\nAxions are ultralight hypothetical particles originally postulated to explain the observed smallness of the neutron´s electric dipole moment and its connection with the so-called strong CP-problem\, i.e. the fact that QCD allows for CP violation while Nature apparently does not. Meanwhile it is clear that axions\, and more generally axion-like particles (ALPs)\, may also serve as interesting candidates for the observed Dark Matter and may explain certain astrophysical anomalies. If axions exist\, they are copiously produced in our Sun and may be detected through their small effective coupling to electro-magnetic fields. A promising approach is their conversion into soft X-ray photons in strong magnetic fields and subsequent detection.\nIn the talk\, I will lay out the experimental scene of axion searches around the globe and then focus on a new proposal\, the International Axion Observatory (IAXO) and its smaller predecessor\, BabyIAXO to be constructed at DESY in Hamburg. I will discuss the layout of the experiment\, ongoing R&D towards its realization and its sensitivity and discovery potential as well the time scale towards realization.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-klaus-desch/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200116T120000
DTEND;TZID=Europe/Berlin:20200116T130000
DTSTAMP:20260417T145535
CREATED:20191203T133851Z
LAST-MODIFIED:20191203T133851Z
UID:2913-1579176000-1579179600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Jim Hinton
DESCRIPTION:HAWC\n[abstract not available yet]
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-jim-hinton/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200123T120000
DTEND;TZID=Europe/Berlin:20200123T130000
DTSTAMP:20260417T145535
CREATED:20191203T133711Z
LAST-MODIFIED:20191203T133711Z
UID:2911-1579780800-1579784400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Brian Reville
DESCRIPTION:Cosmic-ray acceleration – limits and laboratories\nI will review the current theoretical status of shock acceleration at supernova type shocks\, with an emphasis on the plasma theory and implications for limitation on maximum energy. The current hypotheses will be put to the test in a surprising scaled down laboratory\, the binary system Eta Carinae.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-brian-reville/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200618T120000
DTEND;TZID=Europe/Berlin:20200618T130000
DTSTAMP:20260417T145535
CREATED:20200616T095606Z
LAST-MODIFIED:20200616T095606Z
UID:3033-1592481600-1592485200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Dieter Horns
DESCRIPTION:The Crab nebula and pulsar – particle acceleration at the limit\nThe Crab Nebula is the front-page object of multi-wavelength astrophysics and an excellent object to study non-thermal emission and particle acceleration. The Crab Pulsar powers the extreme accelerator regions that inject an ultra-relativistic plasma into the surrounding nebula. The exceptionally well-defined spectral energy distribution has been measured from the lowest accessible frequencies to the highest photon energies beyond 100 TeV. In this talk\, I will provide an overview on the recent first-time measurements of spatial extension of the nebula from several GeV to TeV energies and the implications to the magnetic field strength and its spatial dependence in the Nebula. Besides the spatially resolved structure of the nebular emission\, we have found episodes of dimming of the synchrotron emission\, indicating that the highest energy electrons are confined to a compact region that we tentatively identify with the inner knot close to the pulsar’s position.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2020-06-18-dieter-horns/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200702T120000
DTEND;TZID=Europe/Berlin:20200702T130000
DTSTAMP:20260417T145535
CREATED:20200617T100717Z
LAST-MODIFIED:20200617T100717Z
UID:3046-1593691200-1593694800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Muhammad Kasim
DESCRIPTION:Up to two billion times acceleration of scientific simulations with deep neural architecture search\nComputer simulations are invaluable tools for scientific discovery. However\, accurate simulations are often slow to execute\, which limits their applicability to extensive parameter exploration\, large-scale data analysis\, and uncertainty quantification. A promising route to accelerate simulations by building fast emulators with machine learning requires large training datasets\, which can be prohibitively expensive to obtain with slow simulations. Here we present a method based on neural architecture search to build accurate emulators even with a limited number of training data. The method successfully accelerates simulations by up to 2 billion times in 10 scientific cases including astrophysics\, climate science\, biogeochemistry\, high energy density physics\, fusion energy\, and seismology\, using the same super-architecture\, algorithm\, and hyperparameters. Our approach also inherently provides emulator uncertainty estimation\, adding further confidence in their use. We anticipate this work will accelerate research involving expensive simulations\, allow more extensive parameters exploration\, and enable new\, previously unfeasible computational discovery.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2020-07-02-muhammad-kasim/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20200730T120000
DTEND;TZID=Europe/Berlin:20200730T130000
DTSTAMP:20260417T145535
CREATED:20200617T101240Z
LAST-MODIFIED:20200617T101240Z
UID:3049-1596110400-1596114000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Anita Reimer
DESCRIPTION:Identifying sources of high-energy neutrinos of the AGN type: A theoretical approach\nActive galactic nuclei (AGN) have long been predicted to emit neutrinos if they host sites of cosmic-ray acceleration to very high energies. Until a few years ago neutrino astrophysics was merely a prediction by (some) cosmic-ray theorists. It became reality with the first discovery of an astrophysical neutrino flux ~7 years ago. Although the origin of these neutrinos remains unclear up to now\, jets of AGN remain among the prime candidate sources.\nIn this presentation I will discuss the multimessenger approach in the framework of hadronic AGN emission models from a theoretical perspective. Special emphasis will be given on external target photon fields. \n  \n 
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2020-07-30-anita-reimer/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210412T160000
DTEND;TZID=Europe/Berlin:20210412T170000
DTSTAMP:20260417T145535
CREATED:20210411T161731Z
LAST-MODIFIED:20210411T161731Z
UID:3394-1618243200-1618246800@ecap.nat.fau.de
SUMMARY:ECAP mini-series Exploring Gravity: Ira Thorpe
DESCRIPTION:LISA – Bringing the Gravitational Wave Revolution to Space\nGravitational Wave (GW) observatories are humanity’s newest tool for studying the universe. After decades of development efforts\, terrestrial interferometers such as LIGO and Virgo are now routinely detecting ripples in the fabric of spacetime caused by distant astrophysical cataclysms such as the collision of black holes. Early results from these instruments have already provided answers to long-standing questions in astrophysics and\, more importantly\, introduced new questions of their own. However\, even as instruments on the Earth continue to improve\, there will be vast portions of the GW spectrum that will not be accessible due to their limited size and noise in the terrestrial environment. Space-based interferometers a million times larger than their terrestrial cousins will probe the milliHertz GW spectrum\, home to a rich variety of astrophysical signals. \nIn this talk\, I will provide an overview of the Laser Interferometer Space Antenna (LISA)\, an international collaboration to develop the first space-based GW interferometer. I will describe the science applications\, the mission concept\, and key technologies behind what will be the largest scientific instrument ever constructed. I will also highlight the contributions of LISA Pathfinder\, a European-led technology demonstration mission that validated several critical aspects of the LISA concept.
URL:https://ecap.nat.fau.de/index.php/event/ecap-mini-series-exploring-gravity-ira-thorpe/
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210415T160000
DTEND;TZID=Europe/Berlin:20210415T170000
DTSTAMP:20260417T145535
CREATED:20210411T161812Z
LAST-MODIFIED:20210411T161812Z
UID:3397-1618502400-1618506000@ecap.nat.fau.de
SUMMARY:ECAP mini-series Exploring Gravity: Frank Eisenhauer
DESCRIPTION:Infrared Interferometry of the Galactic Center Black Hole\nThe Galactic Center harbors the nearest massive black hole. With a distance of only 8 kpc\, it is the closest laboratory to study the astrophysical processes at work in these extreme objects\, and to probe Einstein’s general theory of relativity in the regime of strong gravity. Our presentation gives an overview of the GRAVITY infrared interferometry observations leading to the detection of the gravitational redshift and the Schwarzschild precession in the orbit of a star orbiting the black hole in a 16 yr orbit\, and the observations of orbital motion of hot gas close to the innermost stable orbit. We further present the perspective for future measurements of the spin and quadrupole of the black hole by combining infrared interferometry and spectroscopy form extremely large telescopes\, which will then also test the cosmic censorship and no hair theorem of black holes.
URL:https://ecap.nat.fau.de/index.php/event/ecap-mini-series-exploring-gravity-frank-eisenhauer/
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210422T130000
DTEND;TZID=Europe/Berlin:20210422T140000
DTSTAMP:20260417T145535
CREATED:20210409T113534Z
LAST-MODIFIED:20210409T113534Z
UID:3362-1619096400-1619100000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Ruben Lopez Coto
DESCRIPTION:TeV Halos and their connection to the local Leptonic Cosmic Ray flux\nThe origin and propagation of cosmic rays (CRs) is one of the most important questions in astroparticle physics nowadays. CRs generated by known sources also serve as background to those putatively generated by more exotic phenomena. Apart from the known electrons of primary origin and positrons of secondary one\, pulsars and sources powered by them are one of the main candidates to contribute to the total amount of CR electrons and positrons. TeV halos are sources powered by a central pulsar whose electrons and positrons have escaped from the shock region dominated by the pulsar wind and are freely propagating into the interstellar medium. They have been postulated only a couple of years ago and up to date there are only two confirmed sources. In this talk\, I will give a review of the current understanding of TeV halos\, the observational status and their contribution to the CR sea in the Galaxy. \n 
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-ruben-2021-04-22-lopez-coto/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210429T130000
DTEND;TZID=Europe/Berlin:20210429T140000
DTSTAMP:20260417T145535
CREATED:20210409T114201Z
LAST-MODIFIED:20210409T114201Z
UID:3366-1619701200-1619704800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Raimund Strauss
DESCRIPTION:Coherent neutrino scattering: from experimental challenges to new frontiers in neutrino physics\nThe detection of coherent-neutrino nucleus scattering (CEvNS) opens a new window to study the fundamental properties of neutrinos and to probe physics beyond the Standard Model of Particle Physics. Given the very low recoil energies (eV – keV) predicted for this weak neutral-current process\, it has only recently been observed experimentally. Favorably\, due to the coherency of the interaction\, the cross-section of CEvNS is typically 2 – 4 orders of magnitude larger than classical neutrino interactions\, which leads to a dramatic miniaturization of neutrino detectors: instead of using multi-ton detector apparatuses\, neutrino detection with compact devices of kg or even g in total mass is in reach. We have established a new experimental approach for a first measurement of CEvNS at a nuclear reactor – the NUCLEUS experiment. With dedicated cryogenic detectors\, for which we have demonstrated world-record energy thresholds of ~20 eV\, we will probe neutrino properties and scenarios for new physics at unprecedentedly low energies. In this seminar\, I will give an overview of this young and growing research field\, and present the status and physics potential of NUCLEUS.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-04-29-raimund-strauss/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210506T130000
DTEND;TZID=Europe/Berlin:20210506T140000
DTSTAMP:20260417T145535
CREATED:20210409T111007Z
LAST-MODIFIED:20210409T111007Z
UID:3358-1620306000-1620309600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Maryam Modjaz
DESCRIPTION:Stellar Forensics with the Most Powerful Explosions in the Universe\nCore-collapse Supernovae (SNe)\, Long-duration Gamma-ray Bursts (GRBs) and exotic transients are exploding massive stars and constitute the most powerful explosions in the universe. Because they are visible over large cosmological distances\, release elements heavier than Helium\, and leave behind extreme remnants such as black holes\, they are fascinating objects\, as well as crucial tools for many areas of astrophysics.However\, for many decades the fundamental question of which stellar systems give rise to which kinds of explosions has remained outstanding. I will discuss the exciting recent progress that we have made on this question in key areas by publishing and thoroughly analyzing the largest data sets in the world at the time\, as well as by developing sophisticated radiative transfer methods to reconstruct the exploded star. I will conclude with an outlook on how the most promising venues of research – using the existing and upcoming innovative large time-domain surveys such as Zwicky Transient Facility II and Rubin’s LSST – will shed new light on the diverse deaths of stars.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-maryam-modjaz/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210521T140000
DTEND;TZID=Europe/Berlin:20210521T150000
DTSTAMP:20260417T145535
CREATED:20210423T154705Z
LAST-MODIFIED:20210423T154705Z
UID:3551-1621605600-1621609200@ecap.nat.fau.de
SUMMARY:ECAP mini-series Exploring Gravity: Michèle Heurs
DESCRIPTION:Gravitational waves in a new light\nUltra-precisely stabilised lasers are the interferometric light sources at the heart of gravitational wave detectors. To achieve ever-higher detection rates for meaningful gravitational wave astronomy\, ever-greater detection sensitivity is required. In this talk\, I will introduce the principle of interferometric gravitational wave detection\, and highlight some of the advanced technologies employed in Advanced LIGO. \nCurrent-generation gravitational wave detectors are already limited by quantum noise of the laser light over wide ranges of their detection band. One sophisticated technique that is already routinely being employed to increase the quantum-limited sensitivity of gravitational wave detectors is the use of non-classical (fixed-quadrature squeezed) light. I will conclude my talk by showing some recent results\, as well as options for quantum noise reduction in laser interferometry and the broader field of quantum optics.
URL:https://ecap.nat.fau.de/index.php/event/ecap-mini-series-exploring-gravity-michele-heurs/
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210610T130000
DTEND;TZID=Europe/Berlin:20210610T140000
DTSTAMP:20260417T145535
CREATED:20210525T082229Z
LAST-MODIFIED:20210525T082229Z
UID:3603-1623330000-1623333600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Alexander Kappes
DESCRIPTION:Recent results from IceCube and the future of neutrino astronomy at the South Pole\nThe IceCube neutrino observatory at the geographic South Pole has now been operating at full capacity for ten years. Following the first observation of astrophysical neutrinos in the TeV — PeV energy range in 2013\, cosmic neutrinos have been established as an important information carrier for exploring the high-energy universe in the context of multi-messenger observations. However\, despite a first compelling evidence\, the sources of high-energy neutrinos remain largely hidden\, indicating a complex neutrino sky.\nAfter an introduction to neutrino astronomy as well as the operation principle of neutrino telescopes and the challenges of building a neutrino detector at the South Pole\, the talk will highlight recent results from IceCube. Finally\, an outlook on future enhancements of IceCube is given\, which aim at addressing the open questions.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-06-10-alexander-kappes/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210617T130000
DTEND;TZID=Europe/Berlin:20210617T140000
DTSTAMP:20260417T145535
CREATED:20210525T111812Z
LAST-MODIFIED:20210525T111812Z
UID:3608-1623934800-1623938400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Rodrigo Guedes Lang
DESCRIPTION:Origin of UHECR: current status of a decades-long open question\nUltra-high-energy cosmic rays (UHECR) are the most energetic known particles of the Universe\, being accelerated to energies up to 7 orders of magnitude higher than those achieved in human-made accelerators. Their origins\, however\, remain an intriguing puzzle even decades after their discovery. In this seminar\, the current status of this puzzle will be discussed. The state-of-the-art experiments will be presented as well as a compilation of relevant data collected so far. The power and limitations of phenomenological studies to decipher this question will be discussed\, focusing on models to estimate the role of local UHECR sources.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-06-17-rodrigo-guedes-lang/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20210624T130000
DTEND;TZID=Europe/Berlin:20210624T140000
DTSTAMP:20260417T145535
CREATED:20210415T150522Z
LAST-MODIFIED:20210415T150522Z
UID:3467-1624539600-1624543200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Katharina-Sophie Isleif
DESCRIPTION:Light-Shining-Through-A-Wall: The ALPS II experiment at DESY\nThe ALPS II at DESY in Hamburg is a light-shining-through-a-wall (LSW) experiment searching for axion-like elementary particles in the sub eV mass range\, which are motivated by astrophysics and cosmology. ALPS II aims at an axion-photon coupling sensitivity which is several orders of magnitude better than that of previous LSW experiments and will thus investigate a new parameter range. This is achieved by an increased magnetic field interaction length and by optical cavities on both sides of the wall\, which further amplify the signal.\nIn this talk\, the working principle of LSW experiments and the uniqueness and technological challenges of the ALPS II experiment will be explained. Interim results of previous investigations will be presented\, as well as the current status. By converting axions to photons\, we expect a rate of only 1 photon per day. The two sophisticated detector schemes\, coherent heterodyne detection and a cryogenic single photon detector\, are also presented and their implementation in the ALPS II experiment is discussed. ALPS II is aiming at a first data run in late 2021.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-06-24-katharina-sophie-isleif/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211021T130000
DTEND;TZID=Europe/Berlin:20211021T140000
DTSTAMP:20260417T145535
CREATED:20211013T103540Z
LAST-MODIFIED:20211013T103540Z
UID:3766-1634821200-1634824800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Kay Graf
DESCRIPTION:The ECAP Laboratory\nThe ECAP Laboratory will provide the infrastructure for the experimental-based research of the scientific groups of the institute. The concept of this “Forschungsbau” as well as the timeline for the completion and start of operation will be presented.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-10-21-kay-graf/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211104T130000
DTEND;TZID=Europe/Berlin:20211104T140000
DTSTAMP:20260417T145535
CREATED:20211013T104333Z
LAST-MODIFIED:20211013T104333Z
UID:3770-1636030800-1636034400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Christian Glaser
DESCRIPTION:Radio Detection of High Energy Neutrinos and Deep Learning\nIn this seminar talk\, I will present the current status of in-ice radio detection of ultra-high-energy (UHE\, E > 10^16 eV) neutrinos and how we use deep learning to improve the trigger system and event reconstruction. UHE neutrinos are connected to the most energetic phenomena in our universe and neutrino astronomy is a powerful tool to study the high-energy universe. Their small flux and cross-section require the instrumentation of huge volumes which can be achieved with a sparse array of radio detector stations installed in polar ice sheets. I will report on the results from the pilot arrays ARA and ARIANNA\, the status of the Radio Neutrino Observatory in Greenland (RNO-G) that is currently being deployed and the plans for IceCube-Gen2.\nIn the second part\, I will talk about the usage of deep learning techniques. I will present a pilot study that uses a small convolutional neural network for a real-time rejection of thermal noise which allows to lower the trigger thresholds and leads to an increase in neutrino sensitivity by up to a factor of two. Furthermore\, I will present reconstruction algorithms for the neutrino direction\, energy and flavor based on deep neural networks\, that – for the first time – allowed to quantify the sensitivity to the neutrino flavor.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-11-04-christian-glaser/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211202T130000
DTEND;TZID=Europe/Berlin:20211202T140000
DTSTAMP:20260417T145535
CREATED:20211123T111230Z
LAST-MODIFIED:20211123T111230Z
UID:3802-1638450000-1638453600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Georg Lamer
DESCRIPTION:Two years of eROSITA all-sky surveys: The variable X-ray sky\nThe eROSITA telescope onboard the SRG satellite was launched on 13 July 2019. After an initial phase of calibration and performance verification observations eROSITA started its all-sky survey operation in December 2019. Covering the entire sky within 6 months\, eROSITA is now close to completing its 4th all-sky survey in the 0.2-10 keV band. With the repeated detection of about 1 Million sources in each of the surveys\, the eROSITA surveys are a particularly rich resource for the study of variable X-ray sources.\nI will report on selected highlights of the mission such as an accurate distance measurement towards a Black Hole candidate using dust scattering\, the observation of isolated neutron stars\, or of galaxies caught in the moment of ignition or shut-down of their active nuclei.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-12-02-georg-lamer/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20211217T110000
DTEND;TZID=Europe/Berlin:20211217T120000
DTSTAMP:20260417T145535
CREATED:20211109T204402Z
LAST-MODIFIED:20211109T204402Z
UID:3796-1639738800-1639742400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Alberto Dominguez
DESCRIPTION:Galaxy evolution and cosmology using gamma rays observed with Fermi-LAT\nThe light emitted by all galaxies across the history of the Universe is encoded in the intensity of the extragalactic background light (EBL)\, the diffuse cosmic radiation field at ultraviolet\, optical\, and infrared wavelengths. The EBL is a source of opacity for very high energy gamma rays via pair production\, leaving a characteristic attenuation imprint in the spectra of distant gamma-ray sources. In this seminar\, I will report on new measurements of the EBL using gamma-ray data from both the Large Area Telescope on board the Fermi Gamma-ray Space Telescope and ground-based Imaging Atmospheric Cherenkov Telescopes. These unprecedented measurements have allowed us to derive the cosmic star-formation history\, the number density of faint galaxies during the re-ionization epoch\, and also the expansion rate of the Universe and its matter content. These results demonstrate that gamma-ray astrophysics has matured to the point of providing competitive measurements of cosmic properties previously restricted to techniques used by more traditional astronomy.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-12-17-alberto-dominguez/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220113T130000
DTEND;TZID=Europe/Berlin:20220113T140000
DTSTAMP:20260417T145535
CREATED:20211123T163806Z
LAST-MODIFIED:20211123T163806Z
UID:3808-1642078800-1642082400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Hans Dembinski
DESCRIPTION:The Muon Puzzle in cosmic-ray induced air showers and its connection to the LHC\nHigh-energy cosmic rays are observed indirectly by detecting extensive particle showers initiated in Earth’s atmosphere. These so-called air showers are hadronic cascades which produce a muon component via hadron decay. The muon number is a key observable to infer the mass composition of cosmic rays. The interpretation of air shower observations relies on accurate interaction models\, which is a challenge and an opportunity to test quantum chromodynamics (QCD) under extreme conditions. Air shower simulations with state-of-the-art QCD models show a significant muon deficit with respect to measurements; this is called the Muon Puzzle. The origin of this discrepancy has been traced to the composition of secondary particles in hadronic interactions. The muon discrepancy starts at the TeV scale in the centre-of-mass frame\, which suggests that the origin should be observable at the Large Hadron Collider (LHC). An effect that can potentially explain the puzzle has been observed at the LHC\, but needs to be confirmed with forward facing experiments\, and with future data on oxygen beams.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-01-13-hans-dembinski/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220127T130000
DTEND;TZID=Europe/Berlin:20220127T140000
DTSTAMP:20260417T145535
CREATED:20211123T164026Z
LAST-MODIFIED:20211123T164026Z
UID:3810-1643288400-1643292000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Hao Zhou
DESCRIPTION:Recent highlights from the LHAASO observatory\nThe Large High Altitude Air Shower Observatory (LHAASO)\, located in China at 4410m above sea level\, is a complex of extensive air shower (EAS) detector array. Utilizing different detection techniques\, LHAASO surveys the entire northern gamma-ray and cosmic-ray sky with a wide energy range from sub-TeV to PeV energies. \nThe full array of LHAASO has been operational since July 2021. With data collected with a partial array in 2020\, LHAASO found a dozen UHE gamma-ray sources\, with an unprecedented highest photon energy of 1.4 ± 0.13 PeV. These findings confirmed the existence of PeV particle accelerators in our Galaxy and opened up an era of ultra-high-energy gamma-ray astronomy. \nIn this talk\, I will summarize the status of the LHAASO experiment and present recent highlights from the LHAASO observatory.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-01-27-hao-zhou/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220210T130000
DTEND;TZID=Europe/Berlin:20220210T140000
DTSTAMP:20260417T145535
CREATED:20220104T153753Z
LAST-MODIFIED:20220104T153753Z
UID:3820-1644498000-1644501600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Michael Stelzig
DESCRIPTION:Radar based exploration of subglacial structures\nIce-penetrating radar is one of the most important techniques in glaciological research. Applications can range from gaining insights about the internal structure of glaciers and ice sheets\, to calculating ice volume\, to the detection of hidden features such as crevasses. Recent advances in electronics and radar signal processing offer a huge potential for newly developed\, state-of-the-art ice-penetrating radar systems. Furthermore\, ice-penetrating radar is one of the major instruments for space exploration especially for missions to the Ocean Worlds of the Solar System. \nHence\, several research projects have been started at the Institute of Microwaves and Photonics (LHFT) to address this topic. In this talk\, those research activities are summarized together with the presentation of recent results.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-02-10-michael-stelzig/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220427T130000
DTEND;TZID=Europe/Berlin:20220427T140000
DTSTAMP:20260417T145535
CREATED:20220407T132300Z
LAST-MODIFIED:20220407T132300Z
UID:3922-1651064400-1651068000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Kay Graf\, Stefan Funk
DESCRIPTION:New ECAP Lab information\nStefan and Kay will report on the status\, the usage strategy and the next steps for the ECAP Laboratory.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-04-27-kay-graf-stefan-funk/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220512T130000
DTEND;TZID=Europe/Berlin:20220512T140000
DTSTAMP:20260417T145535
CREATED:20220506T075833Z
LAST-MODIFIED:20220506T075833Z
UID:3950-1652360400-1652364000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Silvia Celli
DESCRIPTION:On the radiation signatures of Galactic PeVatrons: the gamma-ray and neutrino perspective\nVery-high-energy gamma rays and neutrinos are crucial messengers for assessing the PeVatron nature of cosmic sources. In particular\, supernova remnants (SNRs) are since long time believed to be the major contributors to the Galactic cosmic-ray flux observed at Earth. Despite experimental efforts devoted to the identification of PeV activity in SNRs\, such a picture remains yet to be confirmed. Additionally\, the poor knowledge of the magnetic turbulence development and evolution in these sources still prevent us from a full understanding of the process of particle acceleration and propagation at SNR shocks. In this contribution\, I will review the current status of the SNR paradigm for the origin of cosmic rays\, highlighting how (current and future) gamma-ray and neutrino observations can contribute to test this scenario and possibly provide constraints to model parameters. At the same time\, I will also discuss how some features in the cosmic-ray spectrum are possibly related to run-away particles injected by SNRs in the Galaxy\, and what information do they provide about these sources.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-05-12-silvia-celli/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220519T140000
DTEND;TZID=Europe/Berlin:20220519T150000
DTSTAMP:20260417T145535
CREATED:20220507T114049Z
LAST-MODIFIED:20220507T114049Z
UID:3956-1652968800-1652972400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Brian Hare
DESCRIPTION:Revealing Lightning with the LOFAR radio telescope\nLightning is an extremely complex phenomena that is still only poorly understood. For example\, we do not know how lightning initiates\, how it propagates\, or why it emits intense bursts of gamma radiation. One fundamental difficulty in studying lightning is that the best state-of-the-art models are only applicable to spatial regions below a meter in size\, while most observations have 10-100 m resolution. This leaves a large gap between what can been modeled and what can be measured. In the last few years\, however\, our group has started using the LOFAR radio telescope to probe lightning at meter and nanosecond scale resolution and have made tremendous progress in closing the gap between modeling and measurement. In this talk I will discuss the current state of lightning science\, how we are using the LOFAR radio telescope to image lightning\, and exciting new insights that LOFAR is giving into the initiation and propagation of lightning.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-05-19-brian-hare/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220521T180000
DTEND;TZID=Europe/Berlin:20220521T235900
DTSTAMP:20260417T145535
CREATED:20220510T121430Z
LAST-MODIFIED:20220510T121430Z
UID:3959-1653156000-1653177540@ecap.nat.fau.de
SUMMARY:Long Night of Sciences 2022
DESCRIPTION:During the Long Night of Sciences in 2022 the Erlangen Centre for Astroparticle Physics will once again be part of the program. Scientists from different ECAP groups will present their work in an exhibition with posters and many exhibition items: A cloud chamber\, a scale model of a modern gamma-ray telescope\, animated event displays of neutrino telescopes and many more. Our scientists are eager to give insights into their current research and welcome any questions from the general public. \nAdditionally\, at the same venue there will be hourly talks about various interesting physics topics including contributions from ECAP scientists; as well as fascinating physics experiments performed regularly throughout the evening.
URL:https://ecap.nat.fau.de/index.php/event/long-night-of-sciences-2022/
LOCATION:Hörsaalgebäude Physikum\, Staudtstr. 5\, Erlangen\, 91058\, Germany
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20220602T131500
DTEND;TZID=Europe/Berlin:20220602T141500
DTSTAMP:20260417T145535
CREATED:20220510T195823Z
LAST-MODIFIED:20220510T195823Z
UID:3964-1654175700-1654179300@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Patrick Gröschel
DESCRIPTION:Multi-path tolerant beacon localization using a high antenna-count receiver\nIn classic radar localization scenarios the transmitter and the receiver are in the same spot localizing a passive target by illuminating it with EM waves. However\, more and more localization applications arise\, where there is an active beacon/transmitter which is to be localized by some multiple-antenna base station\, e.g. a forklift in a warehouse\, a car in an urban scene\, and many more. For those localization applications\, electromagnetic waves in the microwave spectrum are well suited\, especially when exploiting the knowledge about the phase relations of the receive signal at different antennas of the receiver. The applied localization algorithms generally consider the EM wave to travel directly from the beacon to the base station\, which is not true in a reflective environment (warehouse\, city\, etc.). In such environments the wave also travels along non-direct paths from the beacon to the receiver due to reflections causing the so called “multi-path propagation”\, which causes heavy degradation of the localization accuracy especially in phase-based localization algorithms.\nIn this talk an algorithm is presented which uses compressed sensing and a high antenna count and physically large multi-channel receiver in order to estimate and subtract the impact of the non-direct propagation paths from the receive signal. Based on measurements in a 5.8 GHz radio setup\, it will be shown that this algorithm is well-suited to improve the position estimations in such scenarios.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2022-06-02-patrick-groschel/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
END:VCALENDAR