公开(公告)号：US3915148A

公开(公告)日：1975-10-28

申请号：US52644874

申请日：1974-11-22

Applicant: NASA ,  SHIMADA KATSUNORI

Inventor： FLETCHER JAMES C ADMINISTRATOR ,  SHIMADA KATSUNORI

IPC: F24J2/24 ,  F24J2/07 ,  F24J2/08 ,  F24J2/40 ,  F24J3/02

CPC classification number: F24J2/085 ,  F24J2/0488 ,  F24J2/07 ,  F24J2/24 ,  F24J2/402 ,  Y02E10/41 ,  Y02E10/43 ,  Y02E10/44

Abstract: A solar energy concentrator comprises an array of cylindrical Fresnel lenses, all of which are fixedly aligned in the East-West direction. Each lens concentrates the sun rays and forms a line image which extends in the East-West direction. Located below the lenses are individual fluid channels which extend in the EastWest direction and are spaced apart in the South-North direction. Each line image focuses onto preferably not more than two of the channels which absorb heat of the concentrated sun rays. Each channel has a thermostatically controlled valve which controls fluid flow through the channel to take place only when the channel''s temperature and/or the fluid therein exceed a threshold temperature level.

Abstract translation: 太阳能集中器包括圆柱形菲涅尔透镜阵列，它们都在东西方向上固定对齐。 每个镜头都集中在太阳光线上，形成一条在东西方向延伸的线状图像。 位于镜片下面的是独立的流体通道，它们在东西方向延伸，并在南北方向间隔开。 每个线图像聚焦在优选地不超过两个吸收集中的太阳光线的热量的通道中。 每个通道具有恒温控制阀，其仅在通道的温度和/或其中的流体超过阈值温度水平时控制通过通道的流体流动。

公开(公告)号：US3899696A

公开(公告)日：1975-08-12

申请号：US45516574

申请日：1974-03-27

Applicant: NASA ,  SHIMADA KATSUNORI

Inventor： FLETCHER JAMES C ADMINISTRATOR ,  SHIMADA KATSUNORI

IPC: H01J27/24 ,  H01S3/00 ,  H02N3/00 ,  H01J45/00

CPC classification number: H01J27/24 ,  H01S3/0007 ,  H02N3/00

Abstract: A pool of liquid cesium is spaced apart from a collector in an enclosed vessel. A laser beam is directed to the liquid cesium pool. The beam is focused to provide sufficient laser power density at the liquid cesium surface to vaporize some of the liquid cesium and ionize the vaporized cesium, and thereby form cesium ions and free electrons. The work function of the collector is different from that of cesium. When the work function is higher, the formed ions are attracted to the collector and the electrons are attracted by the liquid cesium, while the electrons and ions are respectively attracted by the collector and liquid cesium respectively when the work function of the collector is less than that of cesium. Thus, a potential difference is generated by the liquid cesium pool and the collector, sufficient to apply electric power to a load. The collector is held at a higher temperature than the liquid cesium to repel any neutralized cesium ions at the collector surface and any vaporized cesium atoms which are not ionized by the laser beam from the collector in order to facilitate the flow of ions or electrons thereto.

Abstract translation: 液体铯池与封闭容器中的收集器间隔开。 激光束被引导到液体铯池。 光束被聚焦以在液体铯表面提供足够的激光功率密度，以蒸发一些液体铯并使蒸发的铯电离，从而形成铯离子和游离电子。 收集器的功能与铯的功能不同。 当功函数较高时，形成的离子被吸引到集电体上，电子被液体铯吸引，电子和离子分别被集电体和液体铯分别吸收，当集电极的功函数小于 铯。 因此，通过液体铯池和集电体产生足以对负载施加电力的电位差。 收集器被保持在比液体铯更高的温度下，以排斥收集器表面处的任何中和的铯离子和任何不被来自收集器的激光束电离的铯原子，以促进离子或电子向其流动。