公开(公告)号：US07827779B1

公开(公告)日：2010-11-09

申请号：US11900372

申请日：2007-09-10

Applicant: Mahadevan Krishnan ,  Kristi Wilson ,  Kelan Champagne ,  Jason D. Wright ,  Andrew N. Gerhan

Inventor： Mahadevan Krishnan ,  Kristi Wilson ,  Kelan Champagne ,  Jason D. Wright ,  Andrew N. Gerhan

IPC: F03H1/00

CPC classification number: F03H1/0012 ,  F03H1/0037 ,  H01J27/26

Abstract: A Liquid Metal Ion Thruster (LMIT) has a substrate having a plurality of pedestals, one end of the pedestal attached to the substrate, and the opposing end of the pedestal having a tip, the pedestals having grooves and the substrate also having grooves coupled to each other and to a source of liquid metal. An extractor electrode positioned parallel to the substrate and above the pedestal tips provides an electrostatic extraction field sufficient to accelerate ions from the tips of the pedestals through the extractor electrode. A series of focusing electrodes with matching apertures provides a flow of substantially parallel ion trajectories, and an optional negative ion source provides a charge neutralization to prevent space charge spreading of the exiting accelerated ions. The assembly is suitable for providing thrust for a satellite while maintaining high operating efficiencies.

Abstract translation: 一种液体金属离子推进器（LMIT）具有一个具有多个基座的基板，底座的一端连接到该基板上，并且底座的相对端具有尖端，该基座具有凹槽，该基板还具有连接到 彼此和液态金属的来源。 平行于基板并且在基座尖端上方设置的提取器电极提供足以加速离子从基座的尖端通过提取器电极的静电引出场。 具有匹配孔的一系列聚焦电极提供基本上平行的离子轨迹的流动，并且可选的负离子源提供电荷中和以防止离开的加速离子的空间电荷扩展。 该组件适用于为卫星提供推力，同时保持高的运行效率。

公开(公告)号：US08038858B1

公开(公告)日：2011-10-18

申请号：US11268167

申请日：2005-11-07

Applicant: Brian L. Bures ,  Jason D. Wright ,  Michael Y. Au ,  Andrew N. Gerhan ,  Mahadevan Krishnan

Inventor： Brian L. Bures ,  Jason D. Wright ,  Michael Y. Au ,  Andrew N. Gerhan ,  Mahadevan Krishnan

IPC: C23C14/54

CPC classification number: C23C14/046 ,  C23C14/0635 ,  C23C14/325 ,  H01J37/32055 ,  H01J37/32614 ,  H01J37/34

Abstract: An apparatus for deposition of plasma reaction films includes a substrate for the deposition of either thin or thick films. The substrate also allows for a film deposition which adheres to the substrate, and also films which may be removed after deposition. The cathode may be fabricated from individual wires, or it may be fabricated from a single conductor. A macro-particle filter which preferentially traps larger particles may be introduced between a porous cathode and the deposition surface. The macro-particle filter may also carry electrical current as is useful for generating a magnetic field such that a Lorentz force acts preferentially on ionized particles, allowing them to pass through the filter while trapping macroparticles that are not influenced by the magnetic field.

Abstract translation: 用于沉积等离子体反应膜的装置包括用于沉积薄膜或厚膜的衬底。 衬底还允许粘附到衬底上的膜沉积，以及沉积后可以去除的膜。 阴极可以由单独的导线制造，或者可以由单个导体制造。 可以在多孔阴极和沉积表面之间引入优先捕获较大颗粒的宏粒子过滤器。 宏粒子滤波器还可以承载用于产生磁场的电流，使得洛伦兹力优先作用于电离粒子，允许它们在捕获不受磁场影响的大颗粒的同时通过过滤器。

公开(公告)号：US07867366B1

公开(公告)日：2011-01-11

申请号：US10834592

申请日：2004-04-28

Applicant: Michael D. McFarland ,  Mahadevan Krishnan ,  Jason D. Wright ,  Andrew N. Gerhan ,  Benjamin Tang

Inventor： Michael D. McFarland ,  Mahadevan Krishnan ,  Jason D. Wright ,  Andrew N. Gerhan ,  Benjamin Tang

IPC: C23C14/00 ,  C23C14/32

CPC classification number: C23C14/325 ,  C23C14/046 ,  C23C14/0635 ,  H01J37/32055 ,  H01J37/32614

Abstract: An apparatus for the deposition of a variable thickness coating onto the inside of a cylindrical tube comprises a variable pressure gas, an cathode coaxially positioned within the cylinder, and a voltage source applied between the cathode and cylindrical tube, which functions as an anode. A radial plasma arc is generated between the anode and cathode at a starting point on the cylinder, and the plasma arc travels down the central axis of the cylinder, providing a helical deposition region on the inside of the cylinder. Selection of the combination of cathode material and gas enable the plasma to generate ionic material which is deposited on the anodic cylinder in the region of the plasma. By varying the pressure of variable pressure gas for each helical path, it is possible to vary the composition of this deposition film.

Abstract translation: 用于将可变厚度涂层沉积到圆柱形管内部的装置包括可变压力气体，同轴位于气缸内的阴极和施加在阴极和圆柱形管之间的电压源，其用作阳极。 在圆柱体的起点处，在阳极和阴极之间产生径向等离子弧，等离子体电弧沿着圆柱体的中心轴向下移动，在气缸的内侧提供螺旋形沉积区域。 选择阴极材料和气体的组合使得等离子体能够产生在等离子体区域中沉积在阳极圆柱体上的离子材料。 通过改变每个螺旋路径的可变压力气体的压力，可以改变该沉积膜的组成。

公开(公告)号：US07221100B2

公开(公告)日：2007-05-22

申请号：US11203599

申请日：2005-08-12

Applicant: Evgeny H. Baksht ,  Mikhail I. Lomaev ,  Dmitry V. Rybka ,  Victor F. Tarasenko ,  Mahadevan Krishnan ,  John R. Thompson

Inventor： Evgeny H. Baksht ,  Mikhail I. Lomaev ,  Dmitry V. Rybka ,  Victor F. Tarasenko ,  Mahadevan Krishnan ,  John R. Thompson

IPC: H05B37/02

CPC classification number: H05B41/34

Abstract: An apparatus for providing power to a gas discharge lamp comprises a storage capacitor and an ignition switch coupled through a primarily parasitic first inductor to a parallel combination of a diode assembly and a second inductor in series with a gas discharge lamp. The second inductor is selected to optimize the energy transfer from the capacitor to the gas discharge lamp. During a first interval determined by the time constant of the series combination of a storage capacitor, a first inductor, and a second inductor, the diode assembly is not conducting and a forward sense current builds in the first and second inductors. During a second interval determined by the interaction of the two parallel circuits driving the gas discharge lamp, during which the diode array is conducting, the smaller reversed sense current flowing in the first inductor and a larger forward sense current flowing in the second inductor add, thereby generating a unipolar, forward sense, single pulse current output for the generation of optical energy by a gas discharge lamp.

公开(公告)号：US09109715B2

公开(公告)日：2015-08-18

申请号：US12245748

申请日：2008-10-05

Applicant: Mahadevan Krishnan

Inventor： Mahadevan Krishnan

IPC: F16K31/02 ,  F16K31/06 ,  B05B1/00 ,  B05B1/14

CPC classification number: F16K31/0658 ,  B05B1/005 ,  B05B1/14

Abstract: A high speed valve has a conductive flyer plate responsive to eddy currents induced by an adjacent coil. The eddy currents generate a repulsive force which opens the valve, and a low-mass flyer plate and spring combined with a resonant plate and spring combination provide a fast opening and closing time for the valve. A nozzle structure directs a supersonic flow of gas into a rectangular array of high-density gas suitable for interaction with a laser beam transverse to the rectangular array of jets for the production of wakefield interaction, leading to very high-energy electrons from the gas jet.

Abstract translation: 高速阀具有响应于相邻线圈感应的涡流的导电翼板。 涡流产生打开阀的排斥力，并且与共振板和弹簧组合的低质量飞盘和弹簧组合为阀提供快速的打开和关闭时间。 喷嘴结构将超音速气流引导成高密度气体的矩形阵列，其适于与横向于矩形阵列阵列的激光束相互作用，用于产生尾流相互作用，导致来自气体射流的非常高能量的电子 。

公开(公告)号：US07053333B1

公开(公告)日：2006-05-30

申请号：US10919424

申请日：2004-08-16

Applicant: Jochen Schein ,  Andrew N. Gerhan ,  Robyn L. Woo ,  Michael Y. Au ,  Mahadevan Krishnan

Inventor： Jochen Schein ,  Andrew N. Gerhan ,  Robyn L. Woo ,  Michael Y. Au ,  Mahadevan Krishnan

IPC: B23K10/00

CPC classification number: H05H1/54 ,  F03H1/0012 ,  F03H1/0087

Abstract: An apparatus for producing a vacuum arc plasma source device using a low mass, compact inductive energy storage circuit powered by a low voltage DC supply acts as a vacuum arc plasma thruster. An inductor is charged through a switch, subsequently the switch is opened and a voltage spike of Ldi/dt is produced initiating plasma across a resistive path separating anode and cathode. The plasma is subsequently maintained by energy stored in the inductor. Plasma is produced from cathode material, which allows for any electrically conductive material to be used. A planar structure, a tubular structure, and a coaxial structure allow for consumption of cathode material feed and thereby long lifetime of the thruster for long durations of time.

Abstract translation: 使用由低电压DC电源供电的低质量，紧凑的感应能量存储电路的真空电弧等离子体源装置的制造装置用作真空电弧等离子体推进器。 电感器通过开关充电，随后开关断开，并产生Ldi / dt的电压尖峰，从而在隔离阳极和阴极的电阻路径上引发等离子体。 等离子体随后由存储在电感器中的能量保持。 等离子体由阴极材料制成，其允许使用任何导电材料。 平面结构，管状结构和同轴结构允许阴极材料进料的消耗，从而长时间持续推进器的寿命长。

公开(公告)号：US07518085B1

公开(公告)日：2009-04-14

申请号：US11384617

申请日：2006-01-31

Applicant: Mahadevan Krishnan

Inventor： Mahadevan Krishnan

IPC: B23K10/00

CPC classification number: F03H1/0087 ,  F03H1/0012 ,  H05H1/54

Abstract: A plasma thruster with a cylindrical inner and cylindrical outer electrode generates plasma particles from the application of energy stored in an inductor to a surface suitable for the formation of a plasma and expansion of plasma particles. The plasma production results in the generation of charged particles suitable for generating a reaction force, and the charged particles are guided by a magnetic field produced by the same inductor used to store the energy used to form the plasma.

Abstract translation: 具有圆柱形内部和外部圆柱形外部电极的等离子体推进器从存储在电感器中的能量施加到适于形成等离子体和扩展等离子体颗粒的表面产生等离子体颗粒。 等离子体产生导致产生适于产生反作用力的带电粒子，并且带电粒子由用于存储用于形成等离子体的能量的相同电感器产生的磁场引导。