Sparse Digital Radio Arrays 2020

Mar 24, 2020, 9:00 AM → Mar 26, 2020, 7:00 PM Europe/Moscow

Conference hall (INR RAS)

Dmitriy Kostunin (DESY/ISU), Grigory Rubtsov (INR)

Sparse Digital Radio Arrays 2020

Selected topics on radio instruments for astroparticle physics

The workshop is dedicated to the present and future radio detectors and physical phenomena behind them, including following topics:

• Ultra-high-energy cosmic rays, gamma-rays and neutrinos
• Self-trigger radio arrays
• Machine learning techniques for astroparticle physics
• 21cm cosmology
• Ultra-low frequency arrays in space
• Open data science in physics.

The program consists of overview and status reports as well as of open discussion of the problems and prospects in the field.

The participation fee is 50€ including coffee breaks and workshop dinner

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The workshop is cancelled

Due to the deteriorating situation regarding the coronavirus (COVID-19), the Organizing committee after consulting with the director of the Institute for Nuclear Research of Russian Academy of Sciences (INR RAS) as well as with the Ministry of Science and Higher Education and local authorities has decided to cancel the Workshop of Sparse Digital Radio Arrays: selected topics on radio instruments for astroparticle physics, scheduled to take place in Moscow from March 24 until March 26 2020.

The Organizing committee has closely monitored the course of the spread of the coronavirus. In doing so it considers carefully the Act of the Mayor of Moscow City 12-UM dated March 5th 2020 and the recommendations of the Russian Ministry of Science and Higher Education regarding the quarantine measures. No other decision was possible than to cancel the workshop.

We regret that step and looking forward to welcome you in Moscow at later time.

poster.pdf

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SDRA_cancellation.pdf

Tuesday, March 24

9:00 AM → 10:00 AM Organizational: Registration and openning

Convener: Dmitriy Kostunin (DESY)

10:00 AM → 11:00 AM Astroparticle Theory: UHE Astroparticle Theory

Convener: Dmitriy Kostunin (DESY)

11:00 AM → 11:30 AM Coffee break

11:30 AM → 1:00 PM Air-shower detectors: Modern detectors

11:30 AM LOFAR

Speaker: Prof. Stijn Buitink

12:30 PM Radio Detection of Air Showers at the Pierre Auger Observatory

The Pierre Auger Observatory in Argentina features the largest antenna array for air-shower detection, the Auger Engineering Radio Array (AERA). AERA consists of 153 antenna stations over 17 km$^2$, detecting air showers in the frequency band of 30-80 MHz. With AERA, the collaboration achieved key results, such as an absolute measurement of the radiation energy of the radio signal, which is highly correlated to the size of the electromagnetic shower component.

The radio technique can be used in two ways to contribute to the cosmic-ray mass composition, as confirmed by our analysis of AERA data in combination with data from the surface array and the fluorescence telescopes. First, by the reconstruction of the position of the shower maximum. Second, by the combination of radio and muon measurements provided by the particle detectors.

During the next two years, the collaboration is installing the AugerPrime upgrade of the Pierre Auger Observatory, enhancing its 3000 km$^2$ surface array in several ways. Among these is the deployment of a SALLA-type antenna above each water-Cherenkov detector of the surface array. While the water-Cherenkov detectors effectively measure the muons produced in very inclined showers, the radio antennas will measure their electromagnetic component. Therefore, the combination of both measurements is expected to improve our understanding of the physics in inclined air showers and to increase the total measurement accuracy. In this talk the results obtained with AERA will be summarized. In addition, the plans and science goals for the radio upgrade of the surface array will be discussed.

Speaker: Frank Schröder (Karlsruhe Institute of Technology (KIT))

1:00 PM → 2:30 PM Lunch break

2:30 PM → 4:30 PM Air-shower detectors: Self-trigger

2:30 PM Radio detection of air showers with OVRO-LWA

The OVRO-LWA is a distributed radio telescope in California. Due to its unique technical set-up, it was used to detect air showers exclusively in self-trigger mode. I will discuss how the OVRO-LWA can be used to develop self-triggering algorithms that may be used for other air shower arrays.

Speaker: Anna Nelles

3:15 PM Tunka Radio Extension

I give an overview of Tunka-Rex, its achievements and future plans

Speaker: Dmitriy Kostunin (DESY)

4:00 PM The development of methods for implementing a self-trigger

Speaker: Yulia Kazarina (API ISU)

4:30 PM → 5:00 PM Coffee break

5:00 PM → 6:00 PM Air-shower detectors: Radio detection at South pole

Wednesday, March 25

9:00 AM → 11:00 AM Organizational: Transfer to PRAO

11:00 AM → 11:15 AM Organizational: PRAO: Coffee + Welcome

11:15 AM → 1:00 PM Radio astronomy: PRAO excursion and overview

1:00 PM → 2:00 PM Lunch

2:00 PM → 4:00 PM Radio astronomy: 21cm cosmology

2:00 PM Mysterious structures observing the view towards the first stars in the Universe

During my talk I will present the latest results of the LOFAR-EoR experiment and multi-frequency analysis of the observed polarized structures in our Galaxy.

Speaker: Vibor Jelic (Ruder Boskovic Institute)

3:00 PM LOFAR calibration

Speaker: Katharine Mulrey (Vrije Universiteit Brussel)

3:30 PM Calibration of Tunka antennas

We present status of the antenna calibration for the Tunka-21cm experiment

Speaker: Stanislav Malakhov

4:00 PM → 6:00 PM Organizational: Transfer to Moscow

7:00 PM → 10:00 PM Organizational: Workshop dinner

Thursday, March 26

9:30 AM → 11:00 AM Radio astronomy: Fast radio bursts

9:30 AM Fast radio bursts: models and observations

I review present status of fast radio bursts (FRBs) observations and discuss main theoretical models suggested to explain this phenomenon.
In particular, I focus on the magnetar scenario when the source of energy of FRBs is related to high magnetic field of young neutron stars.

Speaker: Prof. Sergey Popov (Sternberg Astronomical Institute)

10:30 AM Collapsing axion star as source of repeating fast radio bursts

Reiterating publicly available data, we discover remarkable features in the frequency spectra of repeating Fast Radio Burst 121102. First, we find that the spectra include regular patterns of equidistant peaks which cannot be explained by scintillation, as the interpeak distance 82 MHz does not depend on frequency. These peaks can be attributed to diffractive gravitational lensing. They appear on top of erratic oscillations at scales 100 ÷ 500 MHz due to strong interstellar scintillations and a huge peak at 7 GHz that can be explained by propagation through a plasma lens. Second, separating the propagation effects, we extract intrinsic properties of the burst progenitor which is likely to have narrow spectrum of GHz width. The central frequency of this spectrum changes from burst to burst with a hint for 100 s periodicity.

Speaker: Alexander Panin (INR RAS)

11:00 AM → 11:15 AM Coffee break

11:15 AM → 1:00 PM Air-shower detectors: Future detectors

11:15 AM Radio detection of neutrinos with RNO-G

The Radio Neutrino Observatory (RNO-G) will start construction in 2020 in Greenland. It will target neutrinos above 10 PeV. It is built on experience with the pathfinders ARA and ARIANNA and the successes of air shower arrays.
I will summarize the design and capabilities.

Speaker: Anna Nelles

12:00 PM Development of efficiency models for cosmic-ray radio instruments

Estimation of the efficiency is one of the crucial components for a comprehensive study of the cosmic rays with sparse radio-arrays. The direct estimation of this quantity with the Monte-Carlo approach is computationally demanding. Thus, we develop models for efficiency estimation based on the parametrizations of the radiation footprint. The details and recent updates of this work will be presented.

Speaker: Mr Vladimir Lenok (Karlsruhe Institute of Technology)

12:30 PM Tien Shan extensive air shower array and its radio receiver subsystem

We consider the current status of the Tien Shan complex cosmic ray installation aimed for investigation of the 3-100 PeV extensive air showers (EAS). Together with a spatially distributed detector system of the charged EAS particles this installation includes also the hadron, muon, neutron, and gamma ray detectors which permit to create the complete picture of EAS development in each detected shower event. In recent years the Tien Shan experimental complex was supplemented by a system for registration of the 30-100 MHz radio waves emitted by EAS particles. Presently, this system consists of a set of four receiver stations each of which includes a pair of loop antennas with mutually perpendicular polarization planes. All stations are located in the tops of a cross with 40 m long verges oriented in NS and EW directions. The digitization of the radio signal waveforms is initiated by the EAS trigger from the shower installation and succeeds with a 4 ns time resolution. We present the typical samples of the radio signal records written at the times when some powerful EAS were hitting the Tien Shan shower installation.

Speaker: Alexander Shepetov (P.N.Lebedev Physical Institute)

1:00 PM → 2:30 PM Lunch

2:30 PM → 3:00 PM ULFRA: Cubesat technologies

2:30 PM State of the Art CubeSat Technology

The cubesat technology originally was developed by California Polytechnic State University (Cal Poly) and Stanford University in 1999 for more than 20 years became very popular format of small satellites.
The cubesat satellite size is measured by units (100x100x113mm). There are a lot of different sizes of cubesat satellites from 1U to 12U and more. Now the most popular size is 3U. This satellite sizes can carry on many useful scientific instruments and allow new opportunities for space science because cubesats missions more cheaper than any other. Depending of the size cubesats can provide up to 50W electric power for payload, point control accuracy up to 0.1° and pointing knowledge up to 0.005°/s. Nowadays is actively researched the deployable structures for cubesat that can increase opportunity for scientific instruments on cubesats.
There are two projects: BMSTU-Sail – 1U Cubesat demonstrator of solar sailing deployment technology, and “Yareelo” - two 1,5U Cubesat with sun observation and radiation monitoring sensors are developed at the Bauman University Youth space center with russian scientific organizations. More information about project and projects current status posted on the http://bsail.ru

Speaker: Mr Dmitry Rachkin (Bauman Moscow State Technical University)

3:00 PM → 4:30 PM Data Science in Astroparticle: Machine learning

3:00 PM Machine learning overview

Speaker: Dr Andrey Ustyuzhanin

4:00 PM Autoencoder for Tunka-Rex

Speaker: Pavel Bezyazeekov

4:15 PM Machine learning in X5 retail group

Speaker: Dmitry Shipilov

4:30 PM → 4:45 PM Coffee break

4:45 PM → 5:30 PM Data Science in Astroparticle: Big data

4:45 PM Towards a global analysis and data centre for multi-messenger astroparticle physics

Multi-messenger astroparticle physics is an important approach to understand the physical processes in our high-energy universe. This approach requires - besides large and great experiments on the different messengers - a collection point of data and methods to be applied for efficient multi-messenger analyses. Several initiatives are pursuing the establishment of such a distributed analysis and data centre for astroparticle physics.

Speaker: Andreas Haungs (KIT)

5:15 PM Distributed aggregation, analysis and publication of heterogeneous astroparticle data

German-Russian Astroparticle Data Life Cycle Initiative (GRADLCI) is an international initiative aiming at automation of the maintenance of astroparticle-physics data throughout their entire life cycle, which includes gathering, processing, aggregation, analysis, storage and publication of data. In the talk we discuss the current status of software development in the framework of the project.

Speaker: Victoria Tokareva (KIT)

5:30 PM → 7:00 PM Organizational: Wrap-up