Browsing College of Engineering and Science by Author "Rakov, Vladimir A."

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Numerical simulations of compact intracloud discharges as the Relativistic Runaway Electron Avalanche-Extensive Air Shower process

Arabshahi, Shahab; Dwyer, Joseph R.; Nag, Amit K.; Rakov, Vladimir A.; Rassoul, Hamid K. (2014-01-16)

Compact intracloud discharges (CIDs) are sources of the powerful, often isolated radio pulses emitted by thunderstorms. The VLF-LF radio pulses are called narrow bipolar pulses (NBPs). It is still not clear how CIDs are ...
Observations of stepping mechanisms in a rocket-and-wire triggered lightning flash

Biagi, Christopher J.; Uman, Martin A.; Jordan, Douglas M.; Rakov, Vladimir A.; Dwyer, Joseph R.; Hill, Jonathan D. (2010-12-14)

We present 10 high-speed video images that depict the bottom 150 m of a downward-negative, dart-stepped leader in a rocket-and-wire triggered flash, recorded at 240 kiloframes per second (4.17 μs frame integration time), ...
RF and X-ray source locations during the lightning attachment process

Howard, Joseph S.; Uman, Martin A.; Biagi, Christopher J.; Hill, Dustin; Jerauld, Jason E.; Rakov, Vladimir A.; Dwyer, Joseph R.; Saleh, Ziad H.; Rassoul, Hamid K. (2010-03-18)

Using an eight-station array of electric field derivative (dE/dt) sensors and colocated NaI X-ray detectors, we have obtained 3-D RF source locations during the leaders and attachment processes of three first strokes ...