Recoil Momentum of Target Ions in Collisions of Ar^(6+)+CO_2 at Energies Below 300 eV/u

The collision dynamics and fragmentation process of molecule by highly charged ion impact for single electron capture processes at the low energies below 1 keV/u were studied. The collision energy dependence of the recoil momentum was obtained experimentally and compared it with those calculated by a theoretical model using a deflection function with polarization potential. A fairly good agreement between the measured and calculated results was reached. This suggests that the polarization potential plays a crucial role in the low-energy region.

检测汽轮发电机水冷定子绕组中潮湿线棒的技术

大容量直接水冷汽轮发电机定子线棒由于电腐蚀可能会在水盒纤焊部位发生冷却水向对地绝缘泄漏的情况。一旦冷却水泄漏，由湿热引起的水解作用会加还线棒绝缘老化。因此为了安全运行和正确维护，有必要在早期检测出水泄漏。普通定子线棒绝缘只由云母带叠绕而成，还有另外一种结构的线棒，在线圈端部的对地绝缘中间层中夹有导电层（内部电极层）。内部电极层起分压作用，因此线棒端部表面电场得到了抑制。电容测量法普遍用于检测前一种结构线棒的潮湿情况。但这种方法不能应用于后一种结构的线棒。为检测后一种结构的潮湿线棒，我们开发了玫种新的灵敏的方法，简单介绍了我们在电容法方面的许多经验后，本文详细介绍了新开发的用于带有内部电极的线棒的方法。