Performance of a newly developed SDCCD for X-ray use

TL;DR

This paper reports on the development and testing of a new SDCCD X-ray detector combining a CCD and CsI(Tl) scintillator, demonstrating effective detection of X-rays up to 88 keV.

Contribution

The paper introduces a newly assembled SDCCD with a CsI(Tl) scintillator beneath a fully depleted CCD, enhancing X-ray detection capabilities.

Findings

Effective detection of X-ray emission lines up to 88 keV.

Good light collection efficiency achieved with back-illuminated CCD.

Successful integration of scintillator and CCD for wide-band X-ray detection.

Abstract

A Scintillator Deposited CCD (SDCCD) is a wide-band X-ray detector consisting of a CCD and a scintillator directly attached to each other. We assembled the newly developed SDCCD that the scintillator CsI(Tl) is below the fully depleted CCD. The incident X-rays enter the CCD depletion layer first. Then, X-rays passing through the depletion layer are absorbed in the CsI(Tl). The contact surface of the CCD is a back-illuminated side so that we can have good light collection efficiency. In our experimental setup, we confirmed good performance of our SDCCD detecting many emission lines up to 88\,keV that comes from $^{109}$Cd.