ASAP Cross Talks: Presentation Series
"Evaluation of a novel wide size range fast integrated mobility spectrometer & EMPIRE: a nuclear reaction model code for nuclear astrophysics, nuclear data and nuclear physics"
Presented by Michail Pikridas & Annalia Palumbo, BNL
Friday, June 7, 2013, 5 pm
Hosted by: BNL ASAP
Come grab a drink at the Brookhaven Center Happy Hour and listen to your colleagues talk about their research at BNL! Location: Brookhaven Center, South Room Evaluation of a novel wide size range fast integrated mobility spectrometer by Michail Pikridas Supervisor: Jian Wang A novel instrument, referred to as the wide size range fast integrated mobility spectrometer (WSR-FIMS), that is capable of measuring aerosol distributions at the nanometer size with high frequency, has been developed and evaluated. The WSR-FIMS sizes particles based on their electrical mobility by applying a non-uniform electric field between two parallel plates. All particles, regardless of their mobility, are simultaneously detected by a fast charge-coupled camera after being grown into super-micrometer droplets and illuminated by a laser sheet. The detected aerosol distribution is a function of the voltage range applied during the separation process. By eliminating the need to scan over the detected distribution the WSR-FIMS' time resolution is dictated only by counting statistics and can be as high as 0.1 s under high concentration or 1 s under most ambient conditions. The high sheath to aerosol flow ratio, 50 under typical conditions, ensures a satisfactory size resolution. Particle losses, which have been characterized, mainly occur at the instrument's inlet during conditioning. Because WSR-FIMS combines high time resolution data with single particle counting is suitable for fast changing aerosol processes such as tailpipe emission or mobile (ground or airborne) monitoring. EMPIRE: a nuclear reaction model code for nuclear astrophysics, nuclear data and nuclear physics by Annalia Palumbo Supervisor: Michal Herman EMPIRE is a nuclear reaction model code whose nuclear physics inputs are mainly taken from the RIPL-3 database