2011 Fiscal Year Final Research Report

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

Research Project

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 (倉田美月) 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
Keywords	原子核反応実験 / 質量欠損測定法 / 陽子標的
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.

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