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

• 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
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: CCD / 放射線 / バックグラウンド除去 / 撮像素子 / 荷電粒子 / 雑音除去 / モンテカルロシミュレーション / モンテカルロ・シミュレーション

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.

Research Products

• [Presentation] 空間的反同時計数によるバックグラウンド除去を目指したX線CCD検出 器の性能検証実験 (2015)
  • Author(s): 尾崎正伸, 甲斐晋二, 岩井將親, 堂谷忠靖, 近藤恵介
  • Organizer: 日本天文学会2015年春季年会
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2015-03-18 – 2015-03-21
• [Presentation] 反同時計数型X線CCD素子の、モンテカルロシミュレーションを用いた 性能評価 (2015)
  • Author(s): 近藤恵介, 尾崎正伸, 堂谷忠靖
  • Organizer: 日本天文学会2015年春季年会
  • Place of Presentation: 大阪大学豊中キャンパス
  • Year and Date: 2015-03-18 – 2015-03-21
• [Presentation] 荷電粒子バックグラウンドの除去効率を高めたX線CCD検出器の開発 (2013)
  • Author(s): 岩井將親, 藤永貴久, 井澤正治（東工大、ISAS/JAXA）, 堂谷忠靖, 尾崎正伸,夏苅権（ISAS/JAXA）, 松田佳子, 近藤恵介（総研大、ISAS/JAXA）, 林田清, 中嶋大, 穴吹直久（阪大）
  • Organizer: 日本天文学会2013年春季年会
  • Place of Presentation: 埼玉大学