I will present the design of a permittivity sensor that can be attached to a melting probe and measure the respective ice properties during the melting process, yielding in a comprehensive permittivity profile. Melting probes were already successfully utilized in terrestrial cryospheres, such as alpine glaciers and Antarctica. Further applications to cross the ice shield on Dome C in...
After 30 months, the presentation summarizes the status and results of the PhD project. The goal was to address the overarching topic of UV astronomy from two perspectives. First, the characterization of a UV-sensitive scientific CMOS sensor developed specifically for the ULTRASAT mission. Second, the creation of the first all-sky catalog of UV variables and transients based on GALEX archival...
As the development of IceCube continues, a novel optical module (OM) for IceCube-Gen2 is being developed, that incorporates lessons learned from the development of modules for IceCube Upgrade while adapting to the reduced borehole diameter.
The presentation will provide a brief introduction to four (of many) aspects involved in the development of the Gen2OM prototype.
The concept of gel...
Photomultiplier tubes (PMTs) are a central component of today’s neutrino telescopes such as IceCube and KM3NeT, and an accurate understanding and measurement of their properties is indispensable for further improvement of the detectors. In my talk, the focus is on the optical properties of the photocathode, which is only a few 10 nanometers thick and will be investigated using an ellipsometer....
The IceCube Neutrino Observatory is a cubic kilometer scale
Cherenkov light detector that also searches for signatures of particles
beyond the standard including fractionally charged particles, which directly
and indirectly produce light.
The development of a new trigger for faint signatures of exotic particles is presented. This new trigger includes the analysis of isolated single hits...
We present the work on a fast, effective simulator for the XENONnT experiment, which bypasses the sophisticated - but resource-intensive - simulation of waveforms, while remaining as accurate as possible. This talk focuses on the aspect of predicting the multi-scatter resolution in this 'fast-track' simulation framework.
The success of large observatories such as the IceCube neutrino telescope is highly dependent on the accuracy of their reconstruction algorithms. In IceCube, traditional likelihood-based methods are limited by the lookup tables used for calculating the event hypotheses, since their complexity requires them to be simplified. Promising results have recently been obtained with Event-Generator,...
At which energy the transition from Galactic to extra-galactic cosmic rays (CRs) takes place is one of the major unresolved issues of cosmic ray physics. Although the sources of high-energy cosmic rays remain unknown, one expects to identify them by studying the anisotropy in their arrival directions. Recently, the cosmic ray anisotropy measurements in TeV to PeV energy range were updated from...
An explosion of a galactic Supernova is a unique neutrino source: detecting the neutrinos from deep inside the star will help us understand both the physics of the core collapse and properties of the neutrino themselves. If a SN neutrino burst arrived at Earth today or in the near future, it would be detected by a variety of ton to kiloton scale neutrino detectors based on different...
Combining different messenger particles coming from an astrophysical object can yield important insights into its acceleration mechanisms and other properties of the source. Each type of messenger particle carries its own information, often complementary to each other. There is the electromagnetic spectrum from radio waves to very high energy gamma-rays. Photons are not deflected by galactic...
The Davis-Chandrasekhar-Fermi (DCF) method has been widely employed to estimate the mean magnetic field strengths in astrophysical plasmas. We present a numerical study employing the DCF method along with a promising new diagnostic for studying magnetic fields -- the polarization of spectral lines caused by the Ground State Alignment (GSA) effect. We obtain synthetic polarization observations...
Over the last years, the High Energy Stereoscopic System (H.E.S.S.) has shown great progress in the follow-up and observation of energetic transient sources, shedding the light on cosmic particle acceleration and leading to discoveries such as the Recurrent Nova RS Ophiuchi. This brings to attention extreme supernova explosions, which are far more energetic and have been receiving growing...
The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a design for a next-generation ground-based ultra-high energy cosmic ray observatory, addressing the requirements for a large-area, low-cost detector suitable for measuring the properties of the highest energy cosmic rays with an unprecedented aperture. My work is focused on determining atmospheric conditions from the...
LHAASO J2108+5157 is a recently discovered source, detected in the Ultra-High-Energy band by the LHAASO collaboration. Since two molecular clouds were identified in the direction coincident with LHAASO J2108+5157, this source makes a promising galactic PeVatron candidate.
In 2021, the Large-Sized Telescope prototype (LST-1), the first inaugurated Imaging Atmospheric Cherenkov Telescope (IACT)...
Studies of the region around the young 44.7 ms pulsar PSR J1813-1749 are of significant interest because of the exceptional properties of the pulsar. PSR J1813-1749 is not just the most scattered pulsar known, but it also shows one of the highest spin-down luminosities ever measured, second only to the crab pulsar. These properties, as well as the young age of the pulsar and the supernova...
Cosmic rays (CRs) are accelerated in the Galaxy up to energies of at least a few petaelectronvolts (1 PeV = 1e15 eV), as indicated by the detection of gamma-rays well above 10 TeV from various sources in the recent years. This implies the presence of a PeVatron source population in our galaxy, accelerating CRs to PeV energies. The astrophysical nature of these objects, however, is still...
Gamma-ray bursts are some of the most bright (energetic) X-ray and Gamma-ray flashes, very exotic events observed in the entire Universe, emitted by distant extragalactic sources. They are associated with collapsing SMBHs or the creation or merging of neutron stars. These processes are the results of an explosive outburst of materials that move incredibly near the speed of light. The initial...
