Effective decay time of CF4 secondary scintillation

We report on the time evolution of CF sub(4) 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 interferenc...

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Bibliographic Details
Published in:Journal of instrumentation 2013-07, Vol.8 (7), p.1-8
Main Authors: Margato, LMS, Morozov, A, Fraga, MMFR, Pereira, L, Fraga, FAF
Format: Article
Language:English
Subjects:
Decay
Decay rate
Emission
Evolution
Instrumentation
Scintillation
Spectra
Wavelengths
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Summary:We report on the time evolution of CF sub(4) 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 similar to 15 ns. The UV emission (220-450 nm) exhibits two components. The fast component has an effective decay time ranging from similar to 2 ns (1 bar) to similar to 10 ns (3-5 bar), while the slow component shows a decay time of similar to 40 ns. The slow component accounts for not more than 10% of the integrated UV emission intensity.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/8/07/P07008