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    • 1. 发明授权
    • High average current, high quality pulsed electron injector
    • 高平均电流,高质量脉冲电子注入器
    • US08564224B2
    • 2013-10-22
    • US13109131
    • 2011-05-17
    • Phillip A. SprangleSteven H. GoldAntonio C. TingJoseph R. PenanoDaniel F. GordonBahman Hafizi
    • Phillip A. SprangleSteven H. GoldAntonio C. TingJoseph R. PenanoDaniel F. GordonBahman Hafizi
    • H01J23/06H01J3/14
    • H01J23/06
    • An electron injector including an electron source and a conducting grid situated close to the electron source, one or more RF accelerating/bunching cavities operating at the same fundamental RF frequency; a DC voltage source configured to bias the cathode at a small positive voltage with respect to the grid; a first RF drive configured to apply an RF signal between the cathode and grid at the fundamental and third harmonic RF frequencies; and a second RF drive configured to apply an RF drive signal to the accelerating/bunching cavities. Electrons are emitted by the cathode and travel through the grid to the accelerating/bunching cavities for input into an RF linac. The first RF drive applies a first RF drive signal at the fundamental frequency of the linac plus higher harmonics thereof to the gap between the cathode and the grid to cause the emitted electrons to form electron bunches and the second RF drive applies a second RF drive signal to the accelerating/bunching cavities on the other side of the grid to further accelerate and optimize the size of the electron bunches. Because the applied RF signals contain at the fundamental linac frequency, the electrons are bunched at that frequency and each RF bucket of the linac is filled with an electron bunch.
    • 一种电子注入器,包括靠近电子源的电子源和导电栅格,在相同的基本RF频率下工作的一个或多个RF加速/聚束腔; DC电压源,被配置为相对于所述栅极以小的正电压偏压所述阴极; 第一RF驱动器,被配置为在所述基极和三次谐波RF频率处在所述阴极和电网之间施加RF信号; 以及被配置为将RF驱动信号施加到加速/聚束空腔的第二RF驱动器。 电子由阴极发射并通过栅格传播到加速/聚束腔,以输入到RF线性加速器。 第一RF驱动器将线性加速器的基频加上其高次谐波的第一RF驱动信号施加到阴极和栅格之间的间隙,以使发射的电子形成电子束,并且第二RF驱动器施加第二RF驱动信号 到网格另一侧的加速/聚束腔,以进一步加速和优化电子束的尺寸。 因为所施加的RF信号包含基线频率,所以电子以该频率聚束,并且直线加速器的每个RF桶被电子束填充。
    • 2. 发明申请
    • High Average Current, High Quality Pulsed Electron Injector
    • 高平均电流,高质量脉冲电子注射器
    • US20110304283A1
    • 2011-12-15
    • US13109131
    • 2011-05-17
    • Phillip A. SprangleSteven H. GoldAntonio C. TingJoseph R. PenanoDaniel F. GordonBahman Hafizi
    • Phillip A. SprangleSteven H. GoldAntonio C. TingJoseph R. PenanoDaniel F. GordonBahman Hafizi
    • H01J23/06H01J3/14
    • H01J23/06
    • An electron injector including an electron source and a conducting grid situated close to the electron source, one or more RF accelerating/bunching cavities operating at the same fundamental RF frequency; a DC voltage source configured to bias the cathode at a small positive voltage with respect to the grid; a first RF drive configured to apply an RF signal between the cathode and grid at the fundamental and third harmonic RF frequencies; and a second RF drive configured to apply an RF drive signal to the accelerating/bunching cavities. Electrons are emitted by the cathode and travel through the grid to the accelerating/bunching cavities for input into an RF linac. The first RF drive applies a first RF drive signal at the fundamental frequency of the linac plus higher harmonics thereof to the gap between the cathode and the grid to cause the emitted electrons to form electron bunches and the second RF drive applies a second RF drive signal to the accelerating/bunching cavities on the other side of the grid to further accelerate and optimize the size of the electron bunches. Because the applied RF signals contain at the fundamental linac frequency, the electrons are bunched at that frequency and each RF bucket of the linac is filled with an electron bunch.
    • 一种电子注入器,包括靠近电子源的电子源和导电栅格,在相同的基本RF频率下工作的一个或多个RF加速/聚束腔; DC电压源,被配置为相对于所述栅极以小的正电压偏压所述阴极; 第一RF驱动器,被配置为在所述基极和三次谐波RF频率处在所述阴极和电网之间施加RF信号; 以及被配置为将RF驱动信号施加到加速/聚束空腔的第二RF驱动器。 电子由阴极发射并通过栅格传播到加速/聚束腔,以输入到RF线性加速器。 第一RF驱动器将线性加速器的基频加上其高次谐波的第一RF驱动信号施加到阴极和栅格之间的间隙,以使发射的电子形成电子束,并且第二RF驱动器施加第二RF驱动信号 到网格另一侧的加速/聚束腔,以进一步加速和优化电子束的尺寸。 因为所施加的RF信号包含基线频率,所以电子以该频率聚束,并且直线加速器的每个RF桶被电子束填充。
    • 6. 发明申请
    • COMPACT HIGH POWER TERAHERTZ RADIATION CELL
    • 紧凑型高功率TERAHERTZ辐射电池
    • US20110012036A1
    • 2011-01-20
    • US12504769
    • 2009-07-17
    • Daniel F. GordonAntonio C. TingPhillip A. Sprangle
    • Daniel F. GordonAntonio C. TingPhillip A. Sprangle
    • G21G4/00G21K5/00
    • G02F1/353G02F1/3544G02F1/3551G02F2203/13
    • A device for generating terahertz radiation using a phase matched optical rectification technique. The device converts laser radiation to terahertz radiation via a particular type of photonic downconversion. The device includes a crystalline material suitable for photonic downconversion of laser radiation, a first coupling component for coupling the laser radiation to the crystalline material and a second coupling component for coupling the generated terahertz radiation from the crystalline material to the environment. By sustaining the phase matching condition over a significant distance, the device is capable of providing terahertz radiation with high peak and average power. Also disclosed is a method for generating terahertz radiation including the steps of optically coupling laser radiation to a crystalline material suitable for downconversion of the laser radiation to terahertz radiation, downconverting the laser radiation to terahertz radiation and optically coupling the generated terahertz radiation from the crystalline material to the environment.
    • 一种使用相位匹配光学校正技术产生太赫兹辐射的装置。 该器件通过特定类型的光子下变频将激光辐射转换成太赫兹辐射。 该装置包括适于激光辐射的光子下变频的结晶材料,用于将激光辐射耦合到结晶材料的第一耦合部件和用于将产生的太赫兹辐射从结晶材料耦合到环境的第二耦合部件。 通过在相当长的距离上维持相位匹配条件,该装置能够提供具有高峰值和平均功率的太赫兹辐射。 还公开了一种用于产生太赫兹辐射的方法,包括以下步骤:将激光辐射光学地耦合到适合于将激光辐射下转换为太赫兹辐射的结晶材料,将激光辐射下转换成太赫兹辐射并将所产生的太赫兹辐射光学耦合到结晶材料 到环境。
    • 7. 发明申请
    • Remotely Induced Atmospheric Lasing
    • 遥感诱导大气激光
    • US20120170599A1
    • 2012-07-05
    • US13334172
    • 2011-12-22
    • Phillip A. SprangleJoseph R. PenanoMarlan Scully
    • Phillip A. SprangleJoseph R. PenanoMarlan Scully
    • H01S3/30H01S3/22
    • H01S3/2237H01S3/0057H01S3/0959H01S3/104H01S3/2391
    • A laser pulse from an ultrashort pulse laser (USPL) is fired into the atmosphere. The USPL pulse is configured to generate a plasma filament at a predefined target in the atmosphere, in which free, or “seed,” electrons are generated by multi-photon or tunneling ionization of the air molecules in the filament. A second pulse is fired into the atmosphere to form a heater beam that impinges on the plasma filament and thermalizes the seed electrons within the plasma filament, leading to the collisional excitation of the electrons in the filament. The excited electrons collisionally excite various electronic and vibrational states of the air molecules in the filament, causing population inversions and lasing, e.g., exciting the C3Πu→B3Πg(v=0→0) transition of the N2 in the atmosphere to cause lasing at 337 nm.
    • 来自超短脉冲激光(USPL)的激光脉冲被激发到大气中。 USPL脉冲被配置为在大气中的预定目标下产生等离子体灯丝,其中通过灯丝中的空气分子的多光子或隧道电离产生游离或“种子”电子。 将第二脉冲发射到大气中以形成冲击等离子体灯丝的加热器束,并使等离子体灯丝内的种子电子发热,导致灯丝中电子的碰撞激发。 激发的电子碰撞地激发细丝中空气分子的各种电子和振动状态,引起群体反转和激光,例如激发大气中N2的C3和Pgr; u→B3和Pgr; g(v = 0→0)跃迁 导致337 nm的激光。
    • 10. 发明授权
    • High efficiency gyrotron oscillator and amplifier
    • 高效率陀螺仪振荡器和放大器
    • US4370621A
    • 1983-01-25
    • US129294
    • 1980-03-11
    • Phillip A. SprangleRobert A. SmithKwo R. Chu
    • Phillip A. SprangleRobert A. SmithKwo R. Chu
    • H01J25/02H01S1/00H01S4/00
    • H01S1/005H01J25/025
    • An electron cyclotron maser high-frequency generator/amplifier having a cavity resonator positioned in an axial magnetic field. A spiralling beam of relativistic electrons is injected into the cavity and stimulated emission of radiation by the electrons takes place at the frequency of a wave mode supported by the cavity resonator. The transverse efficiency, defined as the average electron energy loss divided by its initial transverse energy, is maximized by disposing a shaped iron collar about the cavity resonator to provide an axial magnetic field in the cavity resonator whose amplitude increases in the beam direction-of-travel. In an alternative embodiment, the transverse efficiency is maximized by tapering the inner wall of the cavity in the axial direction to provide a wave-mode in the cavity resonator whose electric-field amplitude increases in the beam direction-of-travel.
    • 具有位于轴向磁场中的空腔谐振器的电子回旋加速器激光器高频发生器/放大器。 将相对论电子的螺旋形光束注入空腔中,并且通过由腔谐振器支持的波模式的频率发生受电子辐射的辐射。 定义为平均电子能量损失除以其初始横向能量的横向效率通过在空腔谐振器周围设置成形铁圈来在腔谐振器中提供轴向磁场而最大化,其中振子在波束方向上的振幅增加, 旅行。 在替代实施例中,横向效率通过使空腔的内壁沿轴向方向逐渐变细来最大化,以在空腔谐振器中提供波模式,其中电场振幅在光束行进方向上增加。