Evaluation of CCD detector absolute responsivity with the aid of synchrotron radiation

15 Jul 2020, 17:20
20m
Zoom 890 9721 5207 ()

Zoom 890 9721 5207

Oral SR technological application and X-ray apparatus SR technological application and X-ray apparatus

Speaker

Dr Eugene Vishnyakov (P.N.Lebedev Physical Institute of RAS)

Description

We have employed VEPP-4 synchrotron radiation to measure CCD detector absolute responsivity in vacuum ultraviolet (115-310 nm) spectral range. The detector is designed in the form of a stainless steel enclosure containing a backside-illuminated CCD to protect the CCD from contamination. The entrance window of the enclosure is a round MgF2 spectral filter transparent for ultraviolet radiation with wavelengths longer than 112 nm. The measurements were carried out at Kosmos Metrological Station at the operating temperature of -100°C on the sensitive surface of the CCD. We utilized SPD calibrated silicon photodiode with 1 cm2 sensitive area and a known spectral sensitivity profile as a reference detector. The resultant measurements show a clear CCD responsivity dip near 280 nm, and a great potential to improve the CCD responsivity values using specially designed anti-reflection coatings.

Primary author

Dr Eugene Vishnyakov (P.N.Lebedev Physical Institute of RAS)

Co-authors

Mr Andrey Shugarov (Institute of Astronomy of RAS) Mr Denis Ivlyushkin (Budker INP SB RAS) Mr Pavel Zavertkin (Budker INP SB RAS) Dr Anton Nikolenko (Budker INP SB RAS) Mr Viktor Chervinskiy (P.N.Lebedev Physical Institute of RAS) Dr Andrey Pertsov (P.N.Lebedev Physical Institute of RAS) Mrs Nataliya Erkhova (P.N.Lebedev Physical Institute of RAS) Prof. Sergey Kuzin (P.N. Lebedev Physical Institute of RAS)

Presentation Materials