| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 315014000 | Plural concentrating, accelerating, and/or de-accelerating stages | 7 |
| 20110215720 | Segmented Electron Gun, Beam and Collector System and Method for Electron Cooling of Particle Beams - A particle beam, segmented electron gun, segmented electron beam and electron collector system and method to achieve low power loss, segmented current control, and segmented energy control in electron beams, including a vacuum chamber to provide a region substantially free of background gas and allow for electron transport, an electron supply device including a segmented cathode to generate the segmented electron beam, an electrode with a grid conducting structure located in front of the segmented cathode and biased with respect to the segmented cathode in order to accelerate electrons away from the segmented cathode and control the current and energy of each electron beam segment, magnetic field production devices such as solenoidal and torroidal wire windings and permanent magnet material to produce magnetic fields to guide the segmented electron beam and to contain neutralizing-background-ions and an electron collector device including electrodes with a grid conducting structure and outer conducting shell structure to contain neutralizing-background-ions within one or more volume regions and one or more collection plates. The collection plates may or may not be water cooled. The segmented cathode is comprised of electron emitting segments separated by non-emitting-regions. By biasing each segment of the segmented cathode appropriately, and by heating each segment of the segmented cathode appropriately, each section of the electron beam can have its current and energy independently controlled. By biasing each segment of the collection system appropriately, efficient recovery of the electron beam can be obtained. Use of the system and method can involve overlapping the segmented electron beam on a particle beam in an overlap region, wherein thermal energy is transferred from the particle beams to the electron beam, which allows an increase in the phase space density and overall density of the particle beams. | 09-08-2011 |
| 20130221843 | FIELD EMISSION DEVICE WITH AC OUTPUT - A field emission device is configured as a heat engine with an AC output. | 08-29-2013 |
| 20140070696 | TIME-VARYING FIELD EMISSION DEVICE - A field emission device is configured as a heat engine, wherein the configuration of the heat engine is variable as a function of time. | 03-13-2014 |
| 20140152176 | MULTI-DIMENSIONAL PHOTOCATHODE SYSTEM - A photocathode system includes a plurality of photocathodes, and at least one combining device. The photocathodes have individually adjustable voltages, and each photocathode generates an individual electron bunch at an emission period. The combining device combines the individual electron bunches, generated at each emission period, into a combined bunch along a combined axis. The timing of the individual electron bunches is independently adjustable, so that an electron bunch with a lower energy arrives at the combined axis earlier in time compared to another electron bunch with a higher energy, thereby allowing the combined beam of electron bunches to be longitudinally compressed. The photocathodes may be distributed along a 1D column, or a 2D array, or a 3D array, or any arbitrary configuration. A linac is located near a longitudinal focusing point to boost beam energy and therefore freeze bunch length and emittance. | 06-05-2014 |
| 20160093466 | METHOD FOR CORRECTING DRIFT OF ACCELERATING VOLTAGE, METHOD FOR CORRECTING DRIFT OF CHARGED PARTICLE BEAM, AND CHARGED PARTICLE BEAM WRITING APPARATUS - A method for correcting a drift of an accelerating voltage includes measuring, after a position of a focus of a charged particle beam has been adjusted based on a first adjustment value and a predetermined time period has passed, a second adjustment value when the position of the focus of the charged particle beam is newly adjusted, calculating a deviation amount between the first adjustment value and the second adjustment value, calculating, using a correlation stored in a storage device, a correction value of an accelerating voltage to be applied to a beam source which emits the charged particle beam, where the correction value corresponds to the deviation amount, and correcting the accelerating voltage to be applied to the beam source, by using the correlation value. | 03-31-2016 |
| 315015000 | Three or more stages | 2 |
| 20110050097 | HYBRID MODULATION IN AN EMISSION-GATED ELECTRON GUN - An apparatus and method of modulating an electron beam to induce a high degree of spatial bunching uses multiple control grids located in close proximity to an electron-emitting cathode. An RF field couples to the electron beam in the cathode-grid gap to induce velocity modulation. The electron beam then propagates through a first control grid, allowing the velocity modulation to induce spatial bunching. The electron beam then traverses a gap between the first grid and a second control grid and interacts with the RF field to induce further bunching of the beam. Simulations show that bunching factors of 50:1 may be achieved. | 03-03-2011 |
| 20120126697 | CROSSOVER POINT REGULATION METHOD FOR ELECTRO-STATIC FOCUSING SYSTEMS - System that focuses electron beams in an electro-static area to a laminar flow of electrons with uniform distribution of current density and extraordinary demagnification includes a housing having a first interior portion and a second interior portion electrically insulated from the first interior portion. The second interior portion has an electric field-free space. An electrode system is disposed in the first interior portion and includes a cathode assembly and at least one anode assembly. The cathode assembly generates an electron beam that passes through each anode assembly and then into the electric field-free space in the second interior portion. A position of a crossover point on a longitudinal axis maybe regulated by varying dimensions of a substantially cylindrical portion of the anode assembly and a substantially cylindrical portion of a near-cathode electrode assembly. | 05-24-2012 |
