A few phenomena on the fully depleted CCDs at the engineering observation of Hyper Suprime-Cam

Yukiko Kamata; Hidehiko Nakaya; Satoshi Kawanomoto; Satoshi Miyazaki

doi:10.1117/12.2055763

23 July 2014 A few phenomena on the fully depleted CCDs at the engineering observation of Hyper Suprime-Cam

Yukiko Kamata, Hidehiko Nakaya, Satoshi Kawanomoto, Satoshi Miyazaki

Proceedings Volume 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI; 91541Z (2014) https://doi.org/10.1117/12.2055763
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

We report the non-uniformity of quantum efficiency (QE) and concentric ring patterns on the images of the CCDs used in Hyper Suprime-Cam (HSC) mounted on Subaru Telescope. The non-uniformity of QE is seen as gradient patterns along the direction of the vertical resistor especially in images obtained with the g, r, and i-band filters. This is explained by non-uniformity of QE on the CCDs caused by non-uniformity of thickness of the anti-reflective coating. We confirmed this phenomena by using laboratory QE data; with the g-band filter, QE increases 1.5 % from the horizontal resistor side to vertical resistor while it decreases with the i-band filter. The concentric ring pattern is seen on uniformly illuminated images. This is caused by inhomogeneous of impurity in high resistivity silicon wafer. The fluctuation is ±0.3 % of the signal levels with the g, r, i, z, and Y-band filters.

Citation Download Citation

Yukiko Kamata, Hidehiko Nakaya, Satoshi Kawanomoto, and Satoshi Miyazaki "A few phenomena on the fully depleted CCDs at the engineering observation of Hyper Suprime-Cam", Proc. SPIE 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI, 91541Z (23 July 2014); https://doi.org/10.1117/12.2055763

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available