-
公开(公告)号：US4189660A
公开(公告)日：1980-02-19
申请号：US961175
申请日：1978-11-16
申请人： Raphael A. Dandl
发明人： Raphael A. Dandl
CPC分类号： H01J23/027 , H01J23/36
摘要： This invention relates to a cylindrical, electron beam collector that efficiently couples the microwave energy out of a high power microwave source while stopping the attendant electron beam. The interior end walls of the collector are a pair of facing parabolic mirrors and the microwave energy from an input horn is radiated between the two mirrors and reassembled at the entrance to the output waveguide where the transmitted mode is reconstructed. The mode transmission through the collector of the present invention has an efficiency of at least 94%.
摘要翻译： 本发明涉及一种圆柱形的电子束收集器，其能够在停止伴随的电子束的同时将微波能量高效地耦合到高功率微波源中。 收集器的内部端壁是一对面向抛物面反射镜，来自输入喇叭的微波能量辐射在两个反射镜之间，并重新组装在重建传输模式的输出波导的入口处。 通过本发明的收集器的模式传输具有至少94％的效率。
-
公开(公告)号：US20240244738A1
公开(公告)日：2024-07-18
申请号：US18564153
申请日：2022-06-01
发明人： Roman WALCZAK , Oscar JAKOBSSON , Simon HOOKER
CPC分类号： H05H15/00 , H01S3/0057 , H01S3/2383
摘要： A driver (1) for a plasma particle accelerator includes a plasma (10) and laser system(s) (2) that generate first and second pulses. The first pulse (4) has a duration less than the electron plasma period. The second pulse (6) is temporally smooth and has a duration greater than the electron plasma period and less than the ion plasma period. The first pulse generates a plasma wake and the second pulse interacts with the wake to form red and blue-shifted sidebands. The driver also includes a dispersive optical device (20) that introduces a chromatic dispersion to shift the spectral phases of the red and blue-shifted sidebands, to temporally shift them relative to each other, so as to form coincident pulses (22) for generating a plasma wake in a plasma particle accelerator (26).
-
公开(公告)号：US20240117797A1
公开(公告)日：2024-04-11
申请号：US18336425
申请日：2023-06-16
发明人： Michael KEIDAR , Anmol TAPLOO , Li LIN
CPC分类号： F03H1/0037 , H05H15/00
摘要： A plasma thruster has a tunable electron source configured to provide electrons with controllable energy. An entry electrode and an exit electrode permit an air flow to pass from the entry electrode to the exit electrode. The entry electrode and exit electrode receive electrons from the tunable electron source. A controller selectively controls the entry and exit electrodes to accelerate positive and negative ions in the air.
-
公开(公告)号：US20220408542A1
公开(公告)日：2022-12-22
申请号：US17845223
申请日：2022-06-21
IPC分类号： H05H15/00
摘要： Disclosed herein are particle-assisted wakefield electron acceleration devices, accelerated electrons generated using said devices, and methods of use thereof.
-
公开(公告)号：US20220408541A1
公开(公告)日：2022-12-22
申请号：US17892311
申请日：2022-08-22
申请人： HITACHI, LTD.
发明人： Takamichi AOKI
摘要： Provided is a variable energy and miniaturized accelerator. It is impossible to change the energy of the extraction beam in the related cyclotron or to miniaturize an accelerator in the related synchrotron. The accelerator includes a pair of magnets which form a magnetic field therebetween; an ion source which injects ions between the magnets; an acceleration electrode which accelerates the ions; and a beam extraction path which extracts the ions to the outside. A plurality of ring-shaped beam closed orbits formed by the pair of magnets, in which the ions of different energies respectively circulate, are aggregated on one side. The frequency of the radiofrequency electric field fed to the ions by the acceleration electrode is modulated by the beam closed orbits.
-
公开(公告)号：US20220396488A1
公开(公告)日：2022-12-15
申请号：US17300384
申请日：2021-06-10
申请人： Daniel Hodes
发明人： Daniel Hodes
IPC分类号： C01B32/26 , C01B32/28 , C23C16/27 , C23C16/452 , H05H15/00
摘要： An apparatus for fabricating diamond by carbon assembly, which comprises:
a) a hydrocarbon radical generator in operable connection with b) a mass flow conduit extending from the hydrocarbon radical generator in a) to an interface and into a primary magnetic accelerator containing one or more electromagnets in operable connection with c) a diamond fabrication reactor comprising a diamond forming deposition substrate. Also disclosed is a method for fabricating diamond by shockwaves using the disclosed apparatus.-
公开(公告)号：US20220117075A1
公开(公告)日：2022-04-14
申请号：US17476569
申请日：2021-09-16
发明人： Toshiki Tajima , Gerard Mourou , Dante Roa , Ales Necas
摘要： A laser wakefield acceleration (LWFA) induced electron beam system for cancer therapy and diagnostics. Example embodiments presented herein include one or more laser fibers, and an electron beam source within an individual one of the one or more laser fibers, wherein the electron beam source includes a laser pulse source, a plasma target, a set of optics interposing the laser pulse source and the plasma target adapted to focus a laser pulse generated by the laser pulse source onto the plasma target, wherein interaction of the laser pulse with the plasma target induces the generation of an electron beam. In various embodiments presented herein, high energy electrons of the electron beam interact with a high-Z material to generate X-rays.
-
公开(公告)号：US20210212190A1
公开(公告)日：2021-07-08
申请号：US17093240
申请日：2020-11-09
申请人： Wim Leemans , Kelly Swanson , Hann-Shin Mao , Don Syversrud , Anthony Gonsalves , Tyler Sipla
发明人： Wim Leemans , Kelly Swanson , Hann-Shin Mao , Don Syversrud , Anthony Gonsalves , Tyler Sipla
摘要： This disclosure provides systems, methods, and apparatus related to devices and methods for creating hollow, near-hollow, and parabolic plasma channels. In one aspect, a device includes a block of material and a cooling system. The block of material defines a channel having a cylindrical shape and having a first open end and a second open end. An axis of the channel lies along a straight line. The block of material further defines a first gas port and a second gas port. The first gas port and the second gas port are in fluid communication with channel. The cooling system is operable to cool the channel to below the freezing point of a gas.
-
公开(公告)号：US11013100B2
公开(公告)日：2021-05-18
申请号：US16341039
申请日：2017-09-29
摘要： A method of accelerating charged particles in a plasma and an associated plasma accelerator and electromagnetic radiation source, the method including creating a region of non-uniform electric field within the plasma which propagates through the plasma; using the non-uniform electric field to accelerate a first plurality of charged particles in the direction of propagation of the region of non-uniform electric field; and once the accelerating first plurality of charged particles have propagated part-way through the plasma: adding a second plurality of charged particles to the plasma, such that the second plurality of charged particles propagates through the plasma, the second plurality of charged particles create a local distortion in the non-uniform electric field experienced by the accelerating first plurality of charged particles, and the local distortion in the non-uniform electric field propagates through the plasma with the accelerating first plurality of charged particles; and the method also including using the local distortion in the non-uniform electric field to accelerate the first plurality of charged particles in the direction of propagation of the region of non-uniform electric field.
-
公开(公告)号：USRE48047E1
公开(公告)日：2020-06-09
申请号：US15429078
申请日：2017-02-09
发明人： Alan Sliski , Kenneth Gall
摘要： A synchrocyclotron comprises includes a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and an extraction electrode having voltages controlled by the programmable digital waveform generator. The synchrocyclotron can further include a beam monitor. The synchrocyclotron can detect resonant conditions in the resonant circuit by measuring the voltage and or and/or current in the resonant circuit, driven by the input voltage, and adjust the capacitance of the variable capacitor or the frequency of the input voltage to maintain the resonant conditions. The programmable waveform generator can adjust at least one of the oscillating voltage input, the voltage on the injection electrode and the voltage on the extraction electrode according to beam intensity and in response to changes in resonant conditions.
-
-
-
-
-
-
-
-
-
搜索结果
145 条记录 (耗时 0.018 秒)
