RPC R&D collaboration meeting, CERN, High Energy Laboratory at INRNE, Sofia and RPC R&D collaboration High energy Physics Laboratory Scientific staff: Vladimir Genchev Professor, Ph.D. - Head of the Laboratory Georgi Sultanov, Associate Professor, Ph.D. Plamen Iaydjiev, Associate Professor, Ph.D. Peter Vankov, Researcher, Ph.D. Aleksander Aleksandrov, Researcher, Ph.D. Jordan Damgov, Researcher, Ph.D. Stefan Piperov, Researcher Verka Krasteva, Researcher, Preslav Konstantinov, IT Expert Andrey Marinov, Researcher, Ph.D Mariana Shopova, Ph.D. Mircho Rodozov, Ph.D. Ivan Vankov – Prof. DSc, Lubomir Dimitrov – Ass. Prof. PhD, George Mitev– Eng., Ludmil Rachev – Eng. Assembling and commissioning of the Rb3 Muon- RPC’s. Past activities Design, production and technical support for HCAL HPD’S POWER SUPPLY SYSTEM 500x14 kV and 500x200 V channels in 25 crates x 6 modules x 2x4 channels

RPC R&D collaboration meeting, CERN, High Energy Laboratory at INRNE, Sofia and RPC R&D collaboration HF HV POWER SUPPLY SYSTEM 1728 PMTs, 12x2 kV, 12x800 V and 12x400 V channels in 1 crate x 4 modules x 3x3 channels Gif++ activities - radiation sensors Past activities Assembling and commissioning of the RE4+ RE4- Muon- RPC’s. Present activities

RPC R&D collaboration meeting, CERN, High Energy Laboratory at INRNE, Sofia and RPC R&D collaboration Future activities in the RPC R&D project: 1. R&D for RPC’s test at Gif++ - aging, new gas mixture, glass RPC 2. New Front-End Electronics and new Power Supply Systems