Development of Forward Vertex Detector Trigger for Heavy Flavor Quarks at RHIC-PHENIX

• Project/Area Number: 25400312
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Nakagawa Itaru 国立研究開発法人理化学研究所, 仁科加速器研究センター, 専任研究員 (60505668)
• Co-Investigator(Kenkyū-buntansha): IMAZU Yoshimitsu 国立研究開発法人理化学研究所, 仁科加速器研究センター, 特別研究員 (20593677)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 原子核実験 / クォーク・グルーオン・プラズマ / トリガー回路 / FPGA / 高エネルギー / 高多重度 / 陽子陽子衝突 / シリコン検出器 / 電子回路 / 検出器 / クォークグルーオンプラズマ / ２粒子相関

Outline of Final Research Achievements

The quark gluon plasma (QGP) is the state of the matter appears in very high density and temperature circumstances where quarks and gluons are deconfined from nucleons just like the electrons get freed from an atom in a plasma state. The QGP is considered to be the collective state of thermal motion of quarks and gluons and therefore one may expect a boundary condition in the minimum number of quarks and gluons to form QGP. This research is aiming to search for the QGP phenomenon in smallest colliding system proton+proton as ever executed where number of initial quarks and gluons are much smaller than conventional heavy ion collisions. A new trigger system was successfully invented in order to acquire high multiplicity events efficiently which is well known as the final state feature of QGP phenomena. 50 Million high multiplicity events are accumulated.

Research Products

• [Int'l Joint Research] ロスアラモス国立研究所/ブルックヘブン国立研究所(米国)
• [Presentation] RHIC-PHENIX実験Run15における高多重度トリガーシステムの性能評価および陽子+陽子衝突系生成物質の方位角異方性の検証 (2016)
  • Author(s): 長島徹
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学、仙台市、宮城県
  • Year and Date: 2016-03-19
  • Int'l Joint Research
• [Presentation] FVTX検出器のトリガー回路における解析 (2016)
  • Author(s): 益田英和
  • Organizer: 日本物理学会第71回年次大会（ポスター）
  • Place of Presentation: 東北学院大学、仙台市、宮城県
  • Year and Date: 2016-03-19
  • Int'l Joint Research
• [Presentation] PHENIX results on collectivity tests in high-multiplicity p+p and p+Au collisions at √sNN=200 GeV (2015)
  • Author(s): 中川格
  • Organizer: Quark Matter 2015
  • Place of Presentation: 神戸ファッションマート、神戸市、兵庫県
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Development of FVTX high-multiplicity trigger system for the RHIC-PHENIX experiment (2015)
  • Author(s): 長島徹
  • Organizer: Quark Matter 2015（ポスター）
  • Place of Presentation: 神戸ファッションマート、神戸市、兵庫県
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Performance of FVTX high-multiplicity trigger system for the RHIC-PHENIX experiment (2015)
  • Author(s): SeYoung Han
  • Organizer: Quark Matter 2015（ポスター）
  • Place of Presentation: 神戸ファッションマート、神戸市、兵庫県
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] RHIC PHENIX実験における FVTX HIGH MULTIPLICITY トリガーシステムの開発 (2015)
  • Author(s): 長島徹*、斉藤航、中川格、長谷川勝一
  • Organizer: 日本物理学会
  • Place of Presentation: 早稲田大学（東京都新宿区）
  • Year and Date: 2015-03-21 – 2015-03-24
• [Remarks] Introduction to FVTX Trigger
  • URL: https://www.phenix.bnl.gov/WWW/offline/wikioff/index.php/FVTX_Trigger