Nagaya Y, Nakatsu H, Ogura S, Shimazaki K, Ueta H, Takeyasu K, Fukutani K
Institute of Industrial Science, The University of Tokyo, Komaba Meguro-ku, Tokyo 153-8 505, Japan.
School of Engineering, Tokyo Denki University, Senju 5 Asahi-cho, Adachi-ku, Tokyo 120-8 551, Japan.
J Chem Phys. 2021 Nov 21;155(19):194201. doi: 10.1063/5.0068251.
We have developed a spin-polarized-hydrogen beam with a hexapole magnet. By combining the beam chopper and pulsed laser ionization detection, the time-of-flight of the hydrogen beam was measured, and the dependence of the beam profile on the velocity was acquired, which was consistent with the beam trajectory simulations. The spin polarization of the beam was analyzed by using the Stern-Gerlach-type magnet in combination with the spatial scan of the detection laser. The spin polarization was about 95% at a focusing condition due to the hexapole magnet. The polarization was, on the other hand, reduced to about 70% for the beam at higher velocities, which is consistent with simulation results.
我们利用六极磁体开发了一种自旋极化氢束。通过结合束流斩波器和脉冲激光电离检测，测量了氢束的飞行时间，并获得了束流轮廓对速度的依赖性，这与束流轨迹模拟结果一致。通过将斯特恩-盖拉赫型磁体与检测激光的空间扫描相结合，分析了束流的自旋极化。在六极磁体的聚焦条件下，自旋极化率约为95%。另一方面，对于较高速度的束流，极化率降低到约70%，这与模拟结果一致。
