Abstract
We report on the time evolution of CF4 secondary scintillation in the pressure range from 1 to 5 bar. Two types of MSGC plates were used for generation of the secondary scintillation in electron avalanches. Time spectra of the scintillation were recorded using several broadband and interference filters in the wavelength range from 220 to 800 nm. The visible emission (450–800 nm) shows a mono-exponential profile with a decay time of ~ 15 ns. The UV emission (220–450 nm) exhibits two components. The fast component has an effective decay time ranging from ~ 2 ns (1 bar) to ~ 10 ns (3–5 bar), while the slow component shows a decay time of ~ 40 ns. The slow component accounts for not more than 10% of the integrated UV emission intensity.