TIME FRAME: October 14-17, 2019
LOCATION: Nor Amberd International Conference Centre of the Yerevan Physics Institute,
Byurakan, Aragatsotn Province, Armenia.
Will be available soon


Cosmic Ray Division of Yerevan Physics Institute, Armenia
Skobeltsyn Institute of Nuclear Physics of Moscow State University, Russia
 Ashot Chilingarian, Yerevan Physics Institute, Armenia, co-chair
 Lev Dorman, Israel Cosmic Ray Center and Emilio Segre' Observatory, Israel
 Joseph Dwyer, Space Science Center (EOS) and Department of Physics University of New
Hampshire, USA
 Gerald Fishman, NASA-Marshall Space Flight Center, Huntsville, AL, USA
 Hartmut Gemmeke, Karlsruhe Institute of Technology, Germany
 David Smith, University of California, Berkeley
 Johannes Knapp, DESY Zeuthen, Germany
 Alexandr Lidvanski, Nuclear Physics Institute, Russian Academy of Science, Russian Federation
 Jean Lilensten, Institut de Planétologie et d'Astrophysique de Grenoble, France
 Evgeny Mareev, Institute of Applied Physics, Nizhny Novgorod, Russian Federation
 Razmik Mirzoyan, MPI, Munich, Germany
 Yasushi Muraki, STE laboratory, Nagoya University, Japan
 Michail Panasyuk, Moscow State University, Russian Federation, co-chair
 Vladimir Rakov, University of Florida, USA
 Marco Tavani, INAF and University of Rome "Tor Vergata", Italy
 Tatsuo Torii, Japan Atomic Energy Agency, Tsuruga, Japan
 Harufumi Tsuchiya, Cosmic Radiation Laboratory, Riken, Japan.
 Lev Zeleny, Space Research Institute, Russian Academy of Sciences, Russian Federation
 Bagrat Mailyan, Florida Institute of Technology, Melbourne, FL, USA.

Thunderstorms and Elementary Particle Acceleration (TEPA-2019) 11 years of TGE observation on Aragats


New emerging field of high-energy atmospheric physics (HEAP) is enriched recently by important observations of particle fluxes on Earth’s surface, in troposphere and in the space. HEAP presently includes 3 main types of measurements: Terrestrial Gamma Ray Flashes (TGFs) - brief burst of gamma radiation (sometimes also electrons and positrons) registered by the orbiting gamma ray observatories in the space; TGEs - prolonged electron and gamma ray fluxes (also neutrons) registered on the earth’s surface;| and gamma glows - gamma ray bursts observed in the thunderclouds by facilities on balloons and aircraft. The central engine initiating the TGE is believed to be the Relativistic Runaway Electron avalanches (RREA), that accelerates seed electrons from an ambient population of cosmic rays (CR) in the large-scale thundercloud electric fields. Observation of numerous TGEs by Japanese, Russian, Armenian, Chines, and Slovakian groups prove that RREA is a robust and realistic mechanism for electron acceleration and multiplication leaving no doubts about the correctness of the RREA model for the TGE initiation. The precisely recovered particle energy spectra gives new glues for testing models of electron acceleration in atmosphere, as well as for scrutinizing the structure of the electric fields in thunderclouds. Models using GEANT4 and CORSIKA codes support in situ measurements of electron and gamma ray energy spectra at Aragats. Numerous observations of TGEs made on Aragats during last 11 years can be widely used for the validation of models aimed to explain TGF phenomena. The relationship of lightning and elementary particle fluxes in the thunderclouds was established on microsecond timescales. The particles flux data, well synchronized with the information on atmospheric discharges give valuable information on the structure of the atmospheric fields in the upper and lower parts of the thunderclouds. Many questions about thundercloud electrification and discharge mechanisms, lightning initiation, propagation and attachment processes, the global electrical circuit, and transient luminous events do not have yet a commonly accepted explanation. The new view of thunderclouds as media full of radiation can help to establish a comprehensive theory of cloud electrification and estimate the role of cloud radiation in climate change. The influence of the electrified atmosphere on the fluxes of electrons and other charged particles is important for experiments registering very-high energy photons (Systems of Imaging Cherenkov telescopes) and hadrons (Surface arrays registering Extensive Air Showers. TEPA meeting is a great opportunity for the scientists to meet, discuss, invent new ideas and make new bridges for collaborative works.


We anticipate the following sessions:
1. Models of atmosphere electrification and electron acceleration;
Multivariate observations of particles and fields from the Earth’s surface, in atmosphere and
from space (TGEs, gamma glows and TGFs);
2. Registration of atmospheric discharges by lightning mapping arrays and interferometers;
3. Influence of the atmospheric electric field on measurements of experiments using
atmosphere as a target (Surface Arrays and Cherenkov Imaging Telescopes)
4. Instrumentation
We plan also discussions on the most intriguing problems of high-energy physics in the atmosphere and
on possible directions for the advancement of the collaborative studies.
Topics to be covered during oral and poster sessions:
▪ Energy spectra of electrons and gamma rays measured on the earth’s surface, in the
atmosphere and in the space; their relation to the electron acceleration models;
▪ Possible relations of the Solar activity and space weather to high-energy physics processes in
the atmosphere;
▪ Registration of wide- and narrowband radio emissions produced by atmospheric discharges
and particle fluxes;
▪ Lightning initiation and its relation to particle fluxes originated in thundercloud (which precede
▪ Neutron and positron production during thunderstorms;
▪ SEVAN East-European particle detector network as a tool for the TGE research;
▪ Methods of the remote sensing of the thundercloud structure and the atmospheric electric
▪ Lightning monitoring with fast cameras;
▪ Millisecond length X- and gamma ray emissions from the lightning;
▪ Abrupt termination of the particle flux by the lightning flash;
▪ Precise electronics for the high-energy atmospheric research;
▪ Relations to the climate and space weather issues;
▪ Influence of the atmospheric electric fields on Extensive Air Shower (EAS) and Cherenkov light.
▪ The possibility of joint observations by space borne and ground-based facilities.
▪ The global electrical circuit.


Due to the size of the venue and other restrictions, the number of participants will be limited to 40.
Therefore, participation in the Symposium is by invitation only. Registered personnel need to submit an
abstract of presentation to receive an invitation.
Abstracts should be submitted electronically on the Symposium website. The deadline for abstract
submission is 15 August 2019
Registration to TEPA 2019 should be done online via the Symposium website. We will provide
participants with their own account on the Symposium website. These accounts will serve for the
submission of abstracts, papers for Symposium proceedings and for providing information about
accompanying persons.
Registration fees:
 Regular Attendees [300 Euro]
 Undergraduate and Graduate Students [150 Euro]
The fee covers the cost of transportation from and to airport, coffee breaks, as well as the Reception, the
Banquet, and excursions. Payment of the registration fee will be accepted at the Symposium desk upon


- 15 August 2019 Abstract submission deadline
- 1 September 2019 Contributed presentations selected and participants notified
- 25 September 2019 Symposium program in the Conference site


The organizers will provide transportation from/to the Yerevan Airport “Zvartnots”. Information on the
arrival date, time and flight number should be sent to the Local Organizing Committee. During the
Symposium, the participants will be accommodated at the hotels in Nor Amberd International Conference
Center of Yerevan Physics Institute, located on the slopes of Mount Aragats, near the village of
Byurakan, Aragatsotn District, Armenia. The Center has a rich tradition of hosting high-energy physics
schools and is well equipped for international forums.
Updated: 02/11/19

Registreted people: 16

  1. First Name - Ashkhen
    Last Name - Yeghiazaryan
  2. First Name - Eric
    Last Name - Jones
  3. First Name - Eric
    Last Name - Jones
  4. First Name - Eric
    Last Name - Jones
  5. First Name - Suren
    Last Name - Hovakimyan
  6. First Name - Suren
    Last Name - Hovakimyan
  7. First Name - Dinah
    Last Name - Chen
  8. First Name - Dotty
    Last Name - Kyte
  9. First Name - Osvaldo
    Last Name - Edman
  10. First Name - Matthew
    Last Name - Shook
  11. First Name - ogasakogiduc
    Last Name - alebabep
  12. First Name - owiweba
    Last Name - aphefiggef
  13. First Name - ayiasbel
    Last Name - oguwmure
  14. First Name - atajujazoguk
    Last Name - arzayli
  15. First Name - arahearakixe
    Last Name - eyiresauda
  16. First Name - ohacieilegahu
    Last Name - oyalixoh



Ashkhen Yegiazaryan
The secretary of the head of CRD
Yerevan Physics Institute
2, Alikhanyan Brothers street
Yerevan 0036, Armenia
Phone: 374-10-352041; 37410-359000 (Nor Amberd)