Thunderstorms' atmospheric electric field effects in the intensity of cosmic ray muons and in neutron monitor data

Details Thunderstorms' atmospheric electric field effects in the intensity of cosmic ray muons and in neutron monitor data Thunderstorms' atmospheric electric field effects in the intensity of cosmic ray muons and in neutron monitor data

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1181d&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 108, Issue A5, pp. SSH 2-1, CiteID 1181, DOI 10.1029/2002JA009533

Physics

5

Interplanetary Physics: Cosmic Rays, Meteorology And Atmospheric Dynamics: Atmospheric Electricity, Interplanetary Physics: Instruments And Techniques, Meteorology And Atmospheric Dynamics: Lightning

Scientific paper

Theoretical and experimental results on the influence of thunderstorms' atmospheric electric field on cosmic ray secondary components are presented. On the basis of the approach proposed by Dorman [1987], theoretical models for a correct numerical evaluation of these effects on hard muon, soft muon, and neutron monitor component are developed. For hard and soft muons the validity of the models are checked by their comparison with experimental results of the Baksan muon detector. For the first time, the effect of thunderstorms' atmospheric electric field on cosmic rays is investigated by simultaneous measurements of one-minute neutron monitor intensity and of atmospheric electric field at the Emilio Segre' Observatory on Mt. Hermon (Israel). A series of large thunderstorms during February 2000 is investigated; for each thunderstorm the maximum atmospheric electric field intensity was ranging from 10 to about 100 kV/m. Clear correlation between field intensity and neutron monitor intensity variations is presented for total intensity and for different detected multiplicity channels. This correlation is quantitatively in agreement with the developed model which takes into account the formation of short-living meso-atoms by the capture of slow negative muons in the lead of the monitor. The effect is relevant only for neutron events with detected multiplicity m = 1 and evident for multiplicity m = 2; the other multiplicity channels are not influenced by neutrons from meso-atoms.

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