Sofikitis Dimitris, Glodic Pavle, Koumarianou Greta, Jiang Hongyan, Bougas Lykourgos, Samartzis Peter C, Andreev Alexander, Rakitzis T Peter
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion-Crete, Greece.
Department of Physics, University of Crete, 70013 Heraklion-Crete, Greece.
Phys Rev Lett. 2017 Jun 9;118(23):233401. doi: 10.1103/PhysRevLett.118.233401. Epub 2017 Jun 8.
We report a novel highly spin-polarized deuterium (SPD) source, via the photodissociation of deuterium iodide at 270 nm. I(^{2}P_{3/2}) photofragments are ionized with m-state selectivity, and their velocity distribution measured via velocity-map slice imaging, from which the D polarization is determined. The process produces ∼100% electronically polarized D at the time of dissociation, which is then converted to ∼60% nuclear D polarization after ∼1.6 ns. These production times for SPD allow collision-limited densities of ∼10^{18} cm^{-3} and at production rates of ∼10^{21} s^{-1} which are 10^{6} and 10^{4} times higher than conventional (Stern-Gerlach separation) methods, respectively. We discuss the production of SPD beams, and combining high-density SPD with laser fusion, to investigate polarized D-T, D-^{3}He, and D-D fusion.
我们报告了一种新型的高自旋极化氘（SPD）源，它是通过在270纳米波长下碘化氘的光解离产生的。I(²P₃/₂)光碎片以m态选择性被电离，其速度分布通过速度映射切片成像测量，由此确定D极化。该过程在解离时产生约100%的电子极化D，然后在约1.6纳秒后转化为约60%的核D极化。SPD的这些产生时间允许碰撞限制密度达到约10¹⁸厘米⁻³，产生速率约为10²¹秒⁻¹，分别比传统（斯特恩 - 盖拉赫分离）方法高10⁶倍和10⁴倍。我们讨论了SPD束的产生，以及将高密度SPD与激光聚变相结合，以研究极化的D - T、D - ³He和D - D聚变。
