Author/Authors :
Watanabe، نويسنده , , Ikuo and Hanai، نويسنده , , Satoshi and Kyoto، نويسنده , , Makoto and Shintomi، نويسنده , , Takakazu and Tsuchiya، نويسنده , , Kiyosumi and Suzuki، نويسنده , , Jun-ichi and Oku، نويسنده , , Takayuki and Adachi، نويسنده , , Tomohiro and Shimizu، نويسنده , , Hirohiko M، نويسنده ,
Abstract :
A Nb3Sn coil for a superconducting sextupole magnet with 40 mm in bore diameter to be used as a neutron refractive optics device was manufactured. The length of the coil is 1 m and the thickness is 23 mm with the saddle shape at the ends. The suspended angle of the coil is 20°. The current 930 A was achieved at 4.2 K and the current density was 1189 A/mm2. The strength of the magnetic field gradient G=2B(r)/r2 (r: distance from the center axis of the sextupole magnet) at this current is estimated to be 21,000 T/m2.
Keywords :
Nb3Sn , Field gradient , Neutron refractive optics , Cold neutron , superconductor , Neutron lens
