A magnetic neutron lens based on an extended Halbach-type permanent sextupole magnet
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- 作者：Takayuki Oku ; Satoru Yamada ; Hajime Sasao ; Jun-ichi Suzuki ; Takenao Shinohara ; Katsuya Hirota ; Kazuaki Ikeda ; Tsuyosi Tsuzaki ; Yoshiaki Kiyanagi ; Michihiro Furusaka ; Hirohiko M. Shimizu
- 关键词：Neutron focusing lens ; Magnetic neutron lens ; Polarized neutron ; SANS ; Focusing SANS
- 刊名：Physica B
- 出版年：2006
- 出版时间：15 November 2006
- 年：2006
- 卷：385-386
- 期：Part 2
- 页码：1225-1228
- 全文大小：309 K
文摘
We have developed a magnetic neutron lens (MNL) based on an extended Halbach-type permanent sextupole magnet. The effective aperture size is 30 mm in diameter and the length is 2400 mm. The sextupole magnetic field distribution B=(G/2) r2 with the gradient coefficient G=10,660±530 T/m2 are generated inside the magnet, where r is the distance from the magnet center axis. The neutron-focusing property is investigated by using pulsed polarized neutrons. The obtained results are discussed in comparison with numerical simulation results. The application to the focusing-geometry small-angle neutron scattering experiments is discussed.