He took part in glass apparatuces production as difussion pumps, distilers, and Geiger-Muller counters for the Cosmick Ray Station on the Musala peak (1959–1983)
He took part at the restoration and implementation of powerful transmission lamps in Veliko Tarnovo together with Vasiliy Kanev, Viktor Orlinov and Kalojan Bobev in 1960
He developed quarz tube production using propane butane gas in 1960s
He investigated glass-metal bonding and quartz tube production for copper-bromide lasers (1974–1988)
Professional experience
He worked in the department for glass production at the Educational technical industry, Sofia (1954–1955)
He became member (1955) and head of glass preparing laboratory at the BAS Institute of Physics (1955)
Award
100 years BAS medal (1969)
Publication
Stefan Rijikov published 5 articles and one book
