Partner: NCSR Demokritos
PI: Dr Eleftheriadis Konstantinos ([email protected])
Operator: Dr. Fetfatzis Prodromos ([email protected])
Permanent HAC station instrument: OPC Grimm 1.109
The Optical particle counter (OPC) installed at Helmos Mt st. at the end of 2015. OPC is routinely used for real-time aerosol characterization in the particle size range of approximately 0.25–32 μm including 32 size channels. This OPC uses a 655nm laser diode to illuminate the aerosol beam, and a wide-angle collector optic to detect light pulses with a photo diode. The optical arrangement (mean scattering angle 90°) collects the scattered light with a parabolic mirror (120°) on one side and an additional 18◦ on the opposing side.