11th International Workshop on Acoustic and Radio EeV Neutrino Detection Activities

Session

Reconstruction

Jun 11, 2026, 9:00 AM

Schlosshotel Karlsruhe

13. Radio interferometric air shower reconstruction at the Pierre Auger Observatory

Pim van Dillen (Radboud University)

6/11/26, 9:00 AM

The Pierre Auger Observatory in Malargüe, Argentina, is the largest cosmic-ray observatory in the world. Recently, the Observatory got a major upgrade, called AugerPrime, which includes the addition of radio antennas to each surface detector station to measure the electromagnetic radiation emitted by air showers. This extension opens up the possibility to perform a 3D-mapping of the air shower...

25. Radio Interferometric Reconstruction of Air Shower Parameters with the SKA-Low array

SUBHADIP SAHA (Ph.D. scholar, IIT Kanpur)

6/11/26, 9:15 AM

The SKA-Low is a dense, uniform radio array that will enable high-precision studies of the cosmic ray induced extensive air-showers. We are developing a near-field beam-forming or interferometric framework to reconstruct key air-shower parameters with the SKA-Low array. Currently, we focus on the interferometric reconstruction of the arrival direction, shower core position, and the depth of...

70. A New Interferometric Reconstruction Method for Radio Neutrino Detection: Application to the Future HERON Observatory

Arsène Ferrière (CEA-LIST, LPNHE)

6/11/26, 9:30 AM

Reconstructing ultra high energy neutrinos from radio signals is challenging in low signal to noise environments, as encountered in HERON, a next generation radio array designed to detect Earth skimming UHE neutrinos using phased stations and individual antennas in a large sparse network. HERON’s phased array provides triggers for individual antennas, where the signal to noise ratio is often...

30. A bayesian air-shower reconstruction method, applied to LOFAR data

Karen Terveer (Friedrich-Alexander-Universität Erlangen-Nürnberg)

6/11/26, 9:45 AM

The Low-Frequency Array (LOFAR) has successfully constrained the mass composition in the $10^{16.5}$ - $10^{18}$ eV range, capturing the transition region from galactic to extragalactic sources. Standard reconstruction methods based on matching data to CoREAS simulations achieve a state-of-the-art precision in reconstruction of the $X_\mathrm{max}$, however they are computationally expensive...

59. Radio Reconstruction of Inclined Air Showers with Information Field Theory

Mr Simon Strähnz (Karlsruhe Institute of Technology)

6/11/26, 10:00 AM

The reconstruction of inclined extensive air showers from radio measurements, even though extensively researched, still holds room for improvement. In this contribution, we will present a new method for reconstructing inclined extensive air showers from radio measurements based on Information Field Theory. This Bayesian approach is based on a full forward model of air shower radio emission...

40. Beyond $X_\mathrm{max}$ : Reconstructing Air Shower Profiles with Information Field Theory with SKA-Low

Keito Watanabe (Institute for Astroparticle Physics, Karlsruhe Institute of Technology)

6/11/26, 10:15 AM

With over 60,000 antennas deployed within a square kilometre radius, the high antenna density of the low-frequency counterpart of the Square Kilometre Array (SKA-Low) will not only perform cosmic ray observations with unprecedented accuracy, but also has the potential to reconstruct parameters beyond the current state-of-the-art. In this work, we develop a framework to reconstruct the...

19. Reconstructing Electric Current Densities of Extensive Air Showers with Information Field Theory

Maximilian Straub (RWTH Aachen)

6/11/26, 11:00 AM

Extensive air showers that develop through the atmosphere emit radio signals that can be measured by ground-based antennas. The resulting time-dependent electric fields contain information about the longitudinal development of the shower.

We present a Bayesian reconstruction framework based on Information Field Theory (IFT) that aims to recover the spatio-temporal structure of the...

69. Bayesian imaging of cosmic-ray air showers

Mrinal Jetti (Max Planck Institute for Astrophysics)

6/11/26, 11:15 AM

Imaging cosmic-ray air showers via their radio emission is gaining renewed attention with the upcoming SKA-LOW, whose dense antenna arrays will measure radio emission from air showers with unprecedented resolution. To extract information about the shower structure and, ultimately, the properties of the primary cosmic ray, we develop an imaging algorithm using Bayesian inference within the...

51. A simulation template-based air shower reconstruction method

Arthur Corstanje (Radboud University Nijmegen)

6/11/26, 11:30 AM

The SKA-Low radio telescope comprising nearly 60,000 antennas in a core region of 1 km$^2$ diameter, is currently being constructed in Australia.
With a number of antennas two orders of magnitude larger than LOFAR, it is a promising next-generation instrument for cosmic-ray detection and precision measurements, operating by the same principles as LOFAR.

To fully make use of the...

58. Reconstruction of anomalous air showers with SKA-Low

Vital De Henau (VUB)

6/11/26, 11:45 AM

Anomalous showers are a special class of extensive air showers (EAS) predicted by Monte Carlo simulations. They occur when a high-energy secondary particle(s) travel(s) significantly farther compared to the other high-energy secondary particles, creating a longitudinal profile which deviates from shower universality. Anomalous showers can be subdivided into double-bump showers (longitudinal...

68. A new method of $X_{\max}$ reconstruction via geometrical backtracking of radio signals

Jhansi Bhavani Vuta (Department of Astroparticle Physics, Institute of Physics of the Czech Academy of Sciences, 18200 Prague, Czech Republic.)

6/11/26, 12:00 PM

The current generation of radio arrays has established radio detection as a viable technique for studying cosmic-ray composition through precise $X_{\max}$ measurements. The benchmark method for $X_{\max}$ reconstruction in radio detection involves fitting measured data to Monte-Carlo simulations, but this approach is computationally expensive. Alternative methods rely on parametrizations...

55. Deducing the development of air showers through measurements of their induced radio-waves

Charles Timmermans

6/11/26, 12:15 PM

The study of cosmic ray induced air showers sheds light on the mass composition of the primary particles, as well as on particle physics at high center of mass energies. So far, the longitudinal development of air showers has been measured by fluorescence telescopes, which have limited statistics. In addition, the depth of shower maximum has been deduced indirectly from measurements of...

35. Differentiable End-to-End Optimization of In-Ice Radio Neutrino Detectors

Nicolai Weitkemper (TU Dortmund University)

6/11/26, 3:30 PM

In-ice radio detection is a rapidly developing field in which detector design choices made now can have a lasting impact on the sensitivity of EeV neutrino searches. While brute-force simulation campaigns are infeasible for large design parameter spaces, differentiable programming makes it possible to compute gradients of a scientific objective with respect to detector design parameters,...

48. Downward ultra-high-energy neutrino detection in the air with radio antennas at ground-based observatories

Baobiao Yue (University of Wuppertal)

6/11/26, 3:45 PM

Ultra-high-energy (UHE) neutrinos are unique cosmic messengers that can traverse cosmological distances unattenuated, providing direct insight into the most energetic processes in the universe. Radio detection offers significant advantages for detecting highly inclined air showers induced by UHE neutrinos, due to a larger exposure range compared to particle detectors, resulting from minimal...

47. Energy estimation of cosmic ray events recorded aboard balloon-borne experiments.

Sergio Cabana Freire (IGFAE - USC)

6/11/26, 4:00 PM

Several balloon-borne radio experiments have targeted the detection of ultra-high energy neutrinos interacting near the Earth's surface. Radio pulses produced by cosmic ray air showers constitute a relevant class of events among the recorded signals. Cosmic ray signals can be produced either by downward-going air showers, where the signal reflects off the Earth's surface before reaching the...

64. Reconstruction Methods and Detector Optimisation Techniques for the Radar Echo Telescope for Neutrinos

Jannes Loonen (Vrije Universiteit Brussel)

6/11/26, 4:15 PM

The Radar Echo Telescope (RET) aims to observe the cosmic neutrino flux at the highest energies (>10 PeV) using radar. Radar allows for determining the position, speed and direction of any radio-reflecting object. In-ice neutrino interactions leave a dense ionisation trail that can serve as a short-lived macroscopic radar target. Therefore, radar is a potential cost-effective radio-based...

38. Progress Toward a Sub-Threshold Search for the Radar Echo Telescope for Cosmic Rays

Curtis McLennan (University of Kansas)

6/11/26, 4:30 PM

The Radar Echo Telescope for Cosmic Rays (RET-CR) is a pathfinder experiment for a future neutrino telescope, using cosmic rays as an in-situ test beam. The buried radar system monitors for echoes off high-energy cosmic-ray induced in-ice cascades. The RET signal and dataset is well suited to a sub-threshold analysis, with properties that can be exploited in a singular-value-decomposition...