Richard C. Flagan

Design and performance of a FLOw TUbe System, FLOTUS, for the CERN CLOUD chamber

Abstract. The primary functions of the FLOw TUbe System (FLOTUS) are to provide the CERN CLOUD chamber with a source of a) pre-aged organic vapours and particles, and b) cloud condensation nuclei (CCN) of any chosen chemical composition and diameter. The quartz flow tube has 20 c...

Fire at the boundary: Airborne toxic metals from the 2025 Los Angeles urban firestorm

Urban fire smoke is chemically distinct from wildland fire smoke, yet remains poorly understood. Using real-time airborne trace element measurements during the 2025 Los Angeles Eaton urban firestorm, we show that the plume evolved rapidly as fire transitioned from structures to w...