TY  - JOUR
AU  - Hare, B. M.
AU  - Scholten, O.
AU  - Dwyer, J.
AU  - Ebert, U.
AU  - Nijdam, S.
AU  - Bonardi, A.
AU  - Buitink, S.
AU  - Corstanje, A.
AU  - Falcke, H.
AU  - Huege, T.
AU  - Hörandel, J. R.
AU  - Krampah, G. K.
AU  - Mitra, P.
AU  - Mulrey, K.
AU  - Neijzen, B.
AU  - Nelles, Anna Friederike
AU  - Pandya, H.
AU  - Rachen, J. P.
AU  - Rossetto, L.
AU  - Trinh, T. N. G.
AU  - ter Veen, S.
AU  - Winchen, T.
TI  - Radio Emission Reveals Inner Meter-Scale Structure of Negative Lightning Leader Steps
JO  - Physical review letters
VL  - 124
IS  - 10
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2021-00190
SP  - 105101
PY  - 2020
AB  - We use the Low Frequency Array (LOFAR) to probe the dynamics of the stepping process of negatively charged plasma channels (negative leaders) in a lightning discharge. We observe that at each step of a leader, multiple pulses of vhf (30–80 MHz) radiation are emitted in short-duration bursts (<10  μs). This is evidence for streamer formation during corona flashes that occur with each leader step, which has not been observed before in natural lightning and it could help explain x-ray emission from lightning leaders, as x rays from laboratory leaders tend to be associated with corona flashes. Surprisingly, we find that the stepping length is very similar to what was observed near the ground, however with a stepping time that is considerably larger, which as yet is not understood. These results will help to improve lightning propagation models, and eventually lightning protection models.
LB  - PUB:(DE-HGF)16
C6  - pmid:32216418
UR  - <Go to ISI:>//WOS:000518820000016
DO  - DOI:10.1103/PhysRevLett.124.105101
UR  - https://bib-pubdb1.desy.de/record/453799
ER  -