Development of ultrathin solid/liquid hydrogen target using nano-thin foil.

• Project/Area Number: 22740189
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: NISHIMURA Mizuki 独立行政法人理化学研究所, 櫻井RI物理研究室, リサーチアソシエイト (60392065)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 原子核反応実験 / 質量欠損測定法 / 陽子標的 / 水素標的 / 液体/固体水素 / 薄膜 / 有機薄膜 / 極低温

Research Abstract

The ulrathin foil with a thickness of 200 nm provided by Nano Membrane was investigated. However, it was found not to be strong enough physically for confining hydrogen in the vacuum. A MICTRON foil(TORAY) with the thickness of 3.6μm was tested, which was the thinnest nonmetallic foil commercially available. The mictron window bulged out at the certain values of the inner pressure ; however, it withstood pressure difference up to 2 atmosphere. Below the temperature of 18K, hydrogen at the pressure of 423 hPa was confined to the cell and fully liquefied successfully. The physical strength is almost equivalent to 12μm luminor foil, whose young's modulus is 4GPa.

Research Products

• [Journal Article] RIKEN Accel (2011)
  • Author(s): M. Kurata-Nishimura, Y. Kondo, N. Tanaka, K. Takahashi, N. Kobayashi, A. Matta and D. Beumel
  • Journal Title: Prog. Rep. Volume: 44 Pages: 218-219
  • Peer Reviewed
• [Journal Article] Development of the cryogenic system CRYPTA for a deuterium gas target (2011)
  • Author(s): M.Kurata-Nishimura
  • Journal Title: RIKEN Accelerator Progress Report Volume: 44(in press)
  • Peer Reviewed