Ultra low BGD X-ray CCD for diffuse X-ray study of unidentified Gamma-ray celestial objects.

2014 Fiscal Year Final Research Report

• Project/Area Number: 24654052
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: MASANOBU Ozaki 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (90300699)
• Research Collaborator: DOTANI Tadayasu ; NATSUKARI Chikara ; FUJINAGA Takahisa ; IZAWA Masaharu ; IWAI Masachika ; KONDO Keisuke ; KAI Shinji ; NAKAJIMA Hiroshi ; ANABUKI Naohisa
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: CCD / 放射線 / バックグラウンド除去

Outline of Final Research Achievements

A research to exclude charged-particle events from X-ray CCD detector output was carried out. Two full-depletion CCD of 200um thickness are stacked with 125 um gap, and events on a chip that have counterparts in a few pixel distance on the other chip are regarded as of charged-particle origin. The chips are mounted on the both sides of a ceramic board with a central hole. We tested the charged-particle descrimination with 230 MeV proton beam, and confirmed that significant part of the events are recognized as the charged-particle origin. The recognition efficiency is, however, significantly lower than our Monte Carlo simulation prediction. Thus further study about the detail of the incident particles and development of the optimal chip alignment and signal processing scheme are required for a practical use.

Free Research Field

観測天文学