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The end stations

The luminescence apparatus 

The experimental chamber is also equipped with a luminescence apparatus. Important applications of this apparatus are the development of scintillating detectors, biomedical markers, Organic Light Emitting Diode (OLED), Light intensifier devices (ex: YAG), and the characterization of wavelength shifters. Important perspectives are the study of the lifetime of excited energy states and transition probabilities, the study of relaxation times and the dynamics of exciting processes (pumping-probe measurements), the opening in the direction of exploitation of fast sources (FEL).
The luminescence apparatus is based on: 
- a quartz UV/VIS fiber optic of diameter 1 mm that can be brought close to the sample;
- the luminescence light is recorded  or without monochromatization (photodiode, PMT) or with monochromatization (spectrometer Ocean Optics HR4000 (λ= 191 – 1100 nm) or monochromator (Acton Sp-300i + CCD camera cooled with Liquid Nitrogen    λ= 400 – 1100 nm).  
It's also possible to perform time resolved measurements with a TAC (Time to Analog Converter).

Luminescence apparatus layout

UV-VIS fiber optics transmission

An example of luminescence measurement is shown here:  the fiber optics collects the monochromatic radiation coming from sample in the experimental chamber (left figure),  the radiation is taken outside the apparatus through the UHV connector (central figure), the final output is based on a CCD equipped Andor monochromator for analysis (right figure). (Courtesy of Prof. Belski, Université Lyon1) .

Last Updated on Thursday, 31 August 2017 10:44