| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8178790 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2013 | 5 Pages |
Abstract
We have been developing active pixel sensors based on silicon-on-insulator technology for future X-ray astronomy missions. Recently we fabricated the new prototype named “XRPIX2”, and investigated its spectroscopic performance. For comparison and evaluation of different chip designs, XRPIX2 consists of 3 pixel types: Small Pixel, Large Pixel 1, and Large Pixel 2. In Small Pixel, we found that the gains of the 68% pixels are within 1.4% of the mean value, and the energy resolution is 656Â eV (FWHM) for 8Â keV X-rays, which is the best spectroscopic performance in our development. The pixel pitch of Large Pixel 1 and Large Pixel 2 is twice as large as that of Small Pixel. Charge sharing events are successfully reduced for Large Pixel 1. Moreover Large Pixel 2 has multiple nodes for charge collection in a pixel. We confirmed that the multi-nodes structure is effective to increase charge collection efficiency.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Shinya Nakashima, Syukyo Gando Ryu, Takaaki Tanaka, Takeshi Go Tsuru, Ayaki Takeda, Yasuo Arai, Toshifumi Imamura, Takafumi Ohmoto, Atsushi Iwata,