Spektr–UF Mission Spectrograph Space Qualified CCD Detector Subsystem

• DOI: 10.3390/photonics10091032
• Publication Date: 2023-09-11T12:58:08Z
• Authors: Andrey Shugarov; Mikhail Sachkov
• Keywords: Spectral resolution

Spektr–UF (World Space Observatory Ultraviolet, WSO-UV) is a Russian-led international collaboration aiming to develop large space-borne 1.7 m Ritchey–Chretién telescope with science instruments study the Universe in ultraviolet wavelengths. The WSO-UV spectrograph (WUVS) consists of three channels: two high-resolution channels (R = 50,000) spectral ranges 115–176 nm and 174–310 nm, low-resolution 1000) channel range 115–305 nm. Each has an almost identical custom detector consisting CCD inside vacuum enclosure, drive electronics. main challenges WUVS detectors are achieve high quantum efficiency FUV-NUV range, provide low readout noise (3 e− at 50 kHz) dark current (<12 e−/pixel/hour), operate integral exposures up 10 h good photometric accuracy. A enclosure variants CCD272-64 sensor different UV AR coatings optimised for each were designed. prevents contamination maintains operating temperature −100 ∘C, while optical bench +20 ∘C. camera electronics box (CEB) that houses was developed. Digital correlated double sampling technology allows extremely flexible frequency normal binned pixel modes. This paper presents design drivers, methods extending service life sensors working signals space radiation environment key calculated parameters results engineering qualification model campaign.