Upgrade program for neutron triple-axis spectrometers in the research reactor JRR-3

JRR-3における3軸分光器の高度化

金子 耕士   ; 脇本 秀一  ; 長壁 豊隆  ; 山内 宏樹   ; 下条 豊; 久保田 正人 ; 武田 全康  

Kaneko, Koji; Wakimoto, Shuichi; Osakabe, Toyotaka; Yamauchi, Hiroki; Shimojo, Yutaka; Kubota, Masato; Takeda, Masayasu

Two major neutron sources, pulsed neutron source MLF/J-PARC and continuous one JRR-3, locate in the Tokai site of Japan Atomic Energy Agency (JAEA). In the research reactor JRR-3, three triple-axis spectrometers TAS-1, TAS-2 and LTAS with different characteristics have been run by JAEA. A complementary use of these triple-axis spectrometers in combination with J-PARC offers an optimum performance in inelastic neutron scattering experiments to study dynamics of materials in wide Q- space. We will present an overview of our upgrade project for these TASs taking advantage of reactor source, in particular, to enhance availability of polarised neutron and extreme sample environment.