Osaka University

Tokai University Educational System

Mitsuo Nakai

Hiroyuki Furukawa

Hirofumi Kan

Akira Yoshikawa

Noriaki Miyanaga

Yasukazu Izawa

Yoshinori Shimada

Katsunobu Nishihara

Shigeru Fujino

Toshihisa Suyama

Hiroshi Azechi

Nobuhiko Sarukura

Masakatsu Murakami

Atsushi Sunahara

Keiji Nagai

Takayoshi Norimatsu

Hiroaki Nishimura

Tatsuhiko Yamanaka

Takahiro Hibino

Ryouji Matsui

Vasilli Zhakhovski

Tomoharu Okuno

Shigeaki Uchida

Keisuke Shigemori

Masahiro Nakatsuka

Hideki Yoshida

Yoshiyuki Usuki

Takahiro Murata

Yasunobu Arikawa

A neutron measurement apparatusA includes a neutron detection unit, a photodetection unitthat detects scintillation light emitted from the neutron detection unit, a light guide optical systemthat guides the scintillation light from the neutron detection unitto the photodetection unit, and a shielding memberwhich is located between the neutron detection unitand the photodetection unitfor shielding radiation passing in a direction toward the photodetection unit. Further, a scintillator formed of a lithium glass material in which PrFis doped to a glass material 20Al(PO)-80LiF is used as a neutron detection scintillator composing the neutron detection unit. Thereby, the neutron detection scintillator and the neutron measurement apparatus which are capable of suitably performing neutron measurement such as measurement of scattered neutrons from an implosion plasma can be realized.

Scintillator for neutron detection and neutron measurement device

An object of the present invention is to provide an extreme ultraviolet light source target which can emits extreme ultraviolet light with high emission efficiency. A solid target made of heavy metal or heavy-metal compound and having a density 0.5 to 80% that of the crystal density is used. When the target is irradiated with a laser beam, plasma of the heavy metal contained in the target is generated, and extreme ultraviolet light having a predetermined wavelength which corresponds to the kind of the heavy metal is emitted from the plasma. When the density of the target is made to be smaller than the crystal density as described above, space distribution of the density of the generated plasma can be controlled, and the region in which plasma absorbs energy of the laser beam overlaps the region in which the plasma emits the extreme ultraviolet light. Thus, emission efficiency can be improved, preventing energy loss. For example, in a case where the SnOtarget having a density 24% of the crystal density is used, the emission efficiency at around 13.5 nm wavelength is higher than in the case where a Sn crystal target is used.

Extreme ultraviolet light source and extreme ultraviolet light source target

Growing community of inventors

Suita, Japan

Mitsuo Nakai