Spin selective neutron transportation and shaping by using multiplet magnetic lenses

Oku, Takayuki   ; Shinohara, Takenao   ; Suzuki, Junichi; Kira, Hiroshi*; Takata, Shinichi  ; Arai, Masatoshi; Hirota, Katsuya*; Iwashita, Yoshihisa*; Shimizu, Hirohiko*

Spin selective neutron transportation and beam shaping can be realized based on the interaction between the neutron magnetic moment and magnetic field. The magnetic optics for neutrons is flexible optics since we can control its characteristics by changing the multiplicity of magnetic poles. Its flexibility is further enhanced by combining the plural functions of the magnetic optics. So far, we have constructed the polarized neutron focusing system consisting of the quadrupole and sextupole magnets, and successfully introduced it into the SANS instrument. Now, we are developing a multiplet magnetic lens system to focus a pulsed neutron beam for a TOF SANS instrument. The details of our work are shown and discussed.