Research on glass cells for 3He neutron spin filters

✍ Scribed by Y. Sakaguchi; H. Kira; T. Oku; T. Shinohara; J. Suzuki; K. Sakai; M. Nakamura; K. Suzuya; K. Aizawa; M. Arai; M. Takeda; S. Wakimoto; D. Yamazaki; S. Koizumi; Y. Endoh; L.J. Chang; Y. Arimoto; T. Ino; H.M. Shimizu; T. Kamiyama; K. Ohoyama; H. Hiraka; K. Tsutsumi; K. Yamada; K. Ohara; K. Kakurai

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 256 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.12.020

✦ Synopsis

Glass cells play an important role in polarized 3 He neutron spin filters. To evaluate the scattering and absorption contribution from glass cells during neutron scattering experiments, we measured smallangle scattering and neutron transmission in GE180 and other glasses. The small-angle neutron scattering measurements revealed that the glasses used for 3 He spin filters have acceptably lower scattering: dS(Q)/ dO ¼ 4-7 Â 10 À 4 cm À 1 at Q ¼ 0.03-0.12 ÅÀ1 . The transmission measurement was performed at J-PARC. Neutron transmission of about 92% through empty GE180 cells was observed over a wide wavelength range 0.014-7.0 Å. To pursue the possibility of being a structural influence on 3 He spin relaxation in GE180 glass cells, we performed precise X-ray diffraction measurement using synchrotron radiation at SPring-8. From these measurements, a structural difference was observed among GE180 glasses with different thermal treatments.