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LEAD workshop Armenia, NOR AMBERD 9-12 June 2015

Some results of observation of ultraviolet and infrared emission from lightning discharges at Aragats Cosmic Station. G.K. Garipov. Skobeltsyn Institute of Nuclear Physics, M.V.Lomonosov Moscow State University, Russia. On behave of the Aragats science teams.

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LEAD workshop Armenia, NOR AMBERD 9-12 June 2015

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  1. Some results of observation of ultraviolet and infrared emission from lightning discharges at Aragats Cosmic Station G.K. Garipov. Skobeltsyn Institute of Nuclear Physics, M.V.Lomonosov Moscow State University, Russia On behave of the Aragats science teams LEAD workshop Armenia, NOR AMBERD 9-12 June 2015

  2. Content. 1. Instrument for observation of ultraviolet and infrared emission from lightning 2. First results of observation of ultraviolet and infrared emission from lightning discharges in the area of Mounting ARAGATS and matching this data with observation from space 4. Some examples of gamma ray observation in thunderstorm simultaneously with optical emission measurements at Mountain ARAGATS and NOR AMBERD building and matching with space observation

  3. UV and IR detector

  4. Block-diagram of the UV & IR detector 1.Signal finding algorithm of the brightest flashes in every 5sec. time interval or a fixed threshold trigger algorithm. 2. Gain control algorithm to fix PMT anode current at a given level in the whole expected airglow range. 3.Interface algorithm for communication with the satellite board or computer. UV&IR detector comprises 2 PMT tubes and electronics block. (first two tubes measure an optical radiation, third measures the charge particle background) Two code are recorded and used in measurements: M- PMT gain DAC code and N- the PMT anode current ADC code (1) collimator, (2) UV-1 filter, (3) IR filter, MX—multiplexor, HV—voltage supply for PM tubes,ADC and DAC—analog-digital and digital-analog convertors, Logic Unit-FPGA.

  5. DUV – detector main parameters UV – 240-400nm weigh– 0.5 kg IR – 610-800nm power consumption – 2.5W Sensitive - area 0.4cm2 gain control range – 105 Field of view ~ 200 waveform amplitude range -4x103 Full dynamic range >108 Quantum efficiency photons to photoelectrons in UV range – 0.2 Quantum efficiency photons to photoelectrons in IR range – 0.02 Maximum realized sensitivity - single photoelectron

  6. The first results of observation of ultraviolet and infrared emission from lightning discharges in the area of Mount ARAGATS from NOR AMBERT building during TEPA 2014

  7. Preliminary notes

  8. Examples of flashes of ultraviolet and infrared emission from lightning discharges at Aragats Mountain 22 September 2014 observed from NOR AMBERD building.

  9. Results of observation of ultraviolet and infrared emission from lightning discharges in the area of Mount ARAGATS from ARAGATS COSMIC STATION 02 NOV 2014 14:55:57  UT “slow” electric field (-7.8 and -6.1 kV/m)   lightning in 23 km from station;

  10. Examples of flashes of ultraviolet and infrared emission from lightning discharges at Aragats Mountain observed 15 June 2015

  11. Example of lightning image, time profile of UV and IR emission and near surface electric field at the point of observation at Aragats Cosmic Station .

  12. MKA-FKI2 satellite NORAD: 40070U Inter. ID: 14037B Launch.: 2014 .07.09 Period: 99.2 min. Revs/day: 14.5 Incl.: 98.4 degrees Apogee: 819 km Perigee: 621 km

  13. Satellite coordinate during thunderstorm observed on 22 Sep 2014 from NOR AMBERD building

  14. Satellite coordinate during thunderstorm observed on 2 NOV 2014

  15. Examples of flashes observed from space

  16. Example of time profile of UV and IR emission recorded at Tien-Shan Cosmic Station

  17. Preliminary results of gamma ray observation observed from NOR AMBERD building 22 SEP 2014 from 20:00 to 22:30 pm TEPA 2014 Armenia, NOR AMBERD 22-26 SEP 2014

  18. Preliminary results of gamma ray observation observed by Aragats Cosmic Station 22 SEP 2014 from 20:00 to 22:30 pm local time

  19. Example of local series of flashes recoded by CHIBIS-M above Africa

  20. Example of local series of flashes recoded by CHIBIS-M above Africa

  21. Summary 1.The presented data show reliable operation of the UV&IR detector at Aragats Cosmic Station. 2. Time structure of events observed at Aragats are similar to the events which were observed from space 3. The presented data confirm gamma ray emission in thunderstorm simultaneously in two points by different detectors at Aragats and Nor Amberd

  22. Thank you !

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