Development of the beam background monitor for the Belle II experiment

• Project/Area Number: 26800155
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: NAKAMURA Katsuro 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (60714425)
• Research Collaborator: Vitale Livio University of Trieste and INFN Trieste
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: ダイヤモンド検出器 / バックグラウンド計測 / ビームバックグラウンド計測器

Outline of Final Research Achievements

We studied a beam background monitor for the Belle II experiment. For the background monitor, we developed the diamond detector with a high charge-correction-efficiency. Radioactive source measurement and I-V curve measurement were conducted to determine the suitable specification of the diamond detector. And, using the FLUKA simulation output, we succeeded to calibrate between the measured current and the irradiated dose. With commissioning beams of SuperKEKB, we estimated the performance of the developed diamond detectors. As a result, we confirmed excellent performance of the detector, and feasibility to use them as the Belle II background monitoring system.

Research Products

• [Int'l Joint Research] University of Trieste/INFN Trieste(Italy)
• [Journal Article] Belle-II VXD radiation monitoring and beam abort with sCVD diamond sensors (2016)
  • Author(s): Prof. Lorenzo Vitale
  • Journal Title: Nuclear Inst. and Methods in Physics Research, A Volume: 824 Pages: 480-482
  • DOI: 10.1016/j.nima.2015.09.007
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] The Belle II SVD detector (2016)
  • Author(s): Katsuro Nakamura
  • Organizer: VERTEX2016
  • Place of Presentation: Elba, Italy
  • Year and Date: 2016-09-26
  • Int'l Joint Research
• [Presentation] Belle II SVD detector (2014)
  • Author(s): Lorentzo Vitale, on the behalf of Belle II SVD group
  • Organizer: VERTEX2014: The 23rd International Workshop on Vertex Detectors
  • Place of Presentation: Macha Lake, The Czech Republic
  • Year and Date: 2014-09-15 – 2014-09-19