Aviv O, Toker Y, Errit M, Bhushan K G, Pedersen H B, Rappaport M L, Heber O, Schwalm D, Zajfman D
Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Rev Sci Instrum. 2008 Aug;79(8):083110. doi: 10.1063/1.2972151.
We describe a bent electrostatic ion beam trap in which cluster ions of several keV kinetic energy can be stored on a V-shaped trajectory by means of an electrostatic deflector placed between two electrostatic mirrors. While maintaining all the advantages of its linear counterpart [Zajfman et al., Phys. Rev. A 55, R1577 (1997); Dahan et al., Rev. Sci. Instrum. 69, 76 (1998)], such as long storage times, straight segments, and a field-free region for merged or crossed beam experiments, the bent trap allows for simultaneous measurement of charged and neutral fragments and determination of the average kinetic energy released in the fragmentation. These unique properties of the bent trap are illustrated by first results concerning the competition between delayed fragmentation and ionization of Al(n) (-) clusters after irradiation by a short laser pulse.
我们描述了一种弯曲的静电离子束阱，在该阱中，通过置于两个静电镜之间的静电偏转器，数keV动能的团簇离子能够以V形轨迹存储。在保留其线性对应物的所有优点[扎伊夫曼等人，《物理评论A》55，R1577（1997）；达汉等人，《科学仪器评论》69，76（1998）]，如长存储时间、直线段以及用于合并或交叉束实验的无场区域的同时，弯曲阱允许同时测量带电和中性碎片，并确定碎片过程中释放的平均动能。弯曲阱的这些独特特性通过关于短激光脉冲辐照后Al(n)(-)团簇的延迟碎片化与电离之间竞争的初步结果得到了说明。
