Page 34 - 00. Complete Version - Progress Report IPEN 2014-2016

34 Lasers Technology | Progress Report

Figura 17 - scanning electron microscope image of a lead sample, before (left) and after (right) the laser irradiation

tron microscope image of a lead sample, be- dars(,) are meant to profile the atmosphere
fore (left) and after (right) the laser irradiation. (atmosphere) with high temporal and spatial
resolution of particles and gases and are im-
Another development being carried is the de- port (important) intruments (instruments) for
velopment of the deposition process of a thin pollution monitoring, atmospheric dynamics
layer film of boron by lasers aiming to de- studies, nuclear safety surveillance and waste
velop a low cost and portable neutron detec- management control. Up to date(,) there are
tor. Boron has one of the highest evaporation four systems developed/deployed by IPEN for
temperatures among the chemical elements; several purposes. The earlier system is lab fixed
furthermore, the boron deposition needs to with 7 channels which operates by the prin-
occur on the surface of a semiconductor de- ciples of Rayleigh, Mie and Raman scattering.
tector, thus discarding electron beams tech- This system has been operational since 2000
niques, which could damage the detector in- and has produced many results on aerosol long
tegrity. The functionality demonstration of the range transport, atmospheric dynamics and
detector has been achieved already; nonethe- hidrological cicles (hydrological cycles) and
less more studies are being carried (out) to im- acted as a teaching tool has produced data to
prove the process. support several graduation thesis.

Laboratory of Environmental Laser Applica- A second transportable system installed at
tions (LEAL) started (began its activities) at LEAL has been performing many experiments
IPEN in 1999 with the implementation of the all over the country supporting important state
first lidar system for tropospheric monitor- and federal projects. A tracking system was
ing in Brazil. Lidars(,) also known as laser ra- deployed in Cubatão in 2012 and active in

Instituto de Pesquisas Energéticas e Nucleares