47results about "Charged particle radiation pressure manipulation" patented technology

A device is provided that can capture and store electrically neutral excited species of antimatter or exotic matter (a mixture of antimatter and ordinary matter), in particular, excited positronium (Ps*). The antimatter trap comprises a three-dimensional or two-dimensional photonic bandgap (PBG) structure containing at least one cavity therein. The species are stored in the cavity or in an array of cavities. The PBG structure blocks premature annihilation of the excited species by preventing decays to the ground state and by blocking the pickoff process. A Bose-Einstein Condensate form of Ps* can be used to increase the storage density. The long lifetime and high storage density achievable in this device offer utility in several fields, including medicine, materials testing, rocket motors, high power/high energy density storage, gamma-ray lasers, and as an ignition device for initiating nuclear fusion reactions in power plant reactors or hybrid rocket propulsion systems.

The present invention relates to a laser guided and powered directed energy weapon that combines two different lasers to accurately and efficiently deliver a high energy electromagnetic pulse (EMP) to a target at long range. The method uses a high energy laser pulse with relatively long pulse duration focused in air to create a plasma ball which emits an intense EMP. Typically the long pulse duration of high energy lasers would severely limit focal accuracy and effective range because of air pressure variations and pollutants in the atmosphere. However the present invention uses a second ultrafast laser to create a long thin optical plasma filament between the variable location of the plasma ball and the target to act as a stable electrical connection or conducting wire. Consequently EMP can be efficiently channeled to the target via the optical filament, thereby dramatically increasing potential accuracy, range and energy delivery efficiency.

The invention relates to a design method of an annular vortex array mask plate with controllable vortex number. By means of computer generated hologram principle, light beam complex amplitude computational simulation is carried out to superimpose two perfect vortex beam mask plates with different radii, so that an annular vortex array can be generated in a far field. Cone angles of two axicon lens are adjusted to control the light ring superposition degree of concentric perfect vortexes, thus achieving generation of an annular vortex array. The annular vortex array can achieve arbitrary control of the dark nuclear number of the ring, thus having very important application prospects in particle manipulation technology.

The present invention is concerned with a system for sorting target particles from a flow of particles. The system has a microscope, a light source, a CCD camera, microfluidic chip device with microfluidic channels, a detection apparatus for detecting the target particles with predefined specific features, a response generating apparatus for generating a signal in response to the detection of the target particles, and an optical tweezing system for controlling movement of optical traps, the optical tweezing system is operably linked to the response signal.

A laser-plasma-based acceleration system includes a focusing element and a laser pulse emission directing a laser beam to the focusing element to such that laser pulses transform into a focused beam and a chamber defining a nozzle having a throat and an exit orifice, emitting a critical density range gas jet from the exit orifice for laser wavelengths ranging from ultraviolet to the mid-infrared. the critical density range gas jet intersects the focused beam at an angle and in proximity to the exit orifice of the nozzle to define a point of intersection between the focused beam and the critical density range gas jet. In intersection with the critical density range gas jet, the pulsed focused beam drives a laser plasma wakefield relativistic electron beam. A corresponding method of laser-plasma-based acceleration is also described. The critical density range may include 2×10²⁰ cm⁻³ to 5×10²¹ cm⁻³.

Methods and apparatus for providing coherent atom population transfer using coherent laser beam pairs in which the frequency difference between the beams of a pair is swept over time. Certain examples include a Raman pulse adiabatic rapid passage sweep regimen configured to be used as a beamsplitter and combiner in conjunction with an adiabatic rapid passage mirror sweep or a standard Raman mirror pulse in a 3-pulse interferometer sequence.

The invention belongs to the optical micromanipulation system technical field and relates to a device for realizing light-induced track rotation based on a double-light beam misalignment method and a method. The device is composed of two sets of capture light generating systems, a transparent sample pool, a lighting system and a measurement system; the lighting system and the measurement system are adopted as auxiliary systems, so that the rotation track of particles can be measured; the two sets of capture light generating systems are located at two sides of the transparent sample pool and respectively generate Gaussian beams with the same power; the Gaussian beams are inputted into the transparent sample pool from the two sides of the transparent sample pool and irradiate the particles along the tangential direction of the particles to be captured; the lighting system below the transparent sample pool is utilized to provide lighting; and the measurement system above the transparent sample pool is utilized to perform observation and measure the rotation track and rotation amplitude of the particles, and at same time, measure the track rotation speed of the particles. The device and the method have the advantages of high control precision, simple and convenient operation, simple experiment system and the like.

A light pulse interferometer includes a first atom source and a first laser. The first atom source is configured to direct a first group of atoms in a first direction. The first laser is configured to generate one or more interferometer laser beam pairs. The one or more interferometer laser beam pairs interact with the first group of atoms in an interferometer sequence of three or more pulses to produce atom interference. A first laser beam pair of the one or more interferometer laser beam pairs is disposed to interact with the first group of atoms to perform 1D-cooling and velocity control of the first group of atoms prior to the interferometer sequence.

A method of performing a computation using a quantum computer includes generating a plurality of laser pulses used to be individually applied to each of a plurality of trapped ions that are aligned in a first direction, each of the trapped ions having two frequency-separated states defining a qubit, and applying the generated plurality of laser pulses to the plurality of trapped ions to perform simultaneous pair-wise entangling gate operations on the plurality of trapped ions. Generating the plurality of laser pulses includes adjusting an amplitude value and a detuning frequency value of each of the plurality of laser pulses based on values of pair-wise entanglement interaction in the plurality of trapped ions that is to be caused by the plurality of laser pulses.

The invention provides an undulator. The undulator at least comprises M permanent magnet cycles which are sequentially arranged along the direction to which an electron beam transmits; each permanent magnet cycle is composed of four rows of permanent magnet structures, each row comprising N rows of permanent magnet sets, wherein each row of permanent magnet sets comprises K permanent magnet units; M, N and K are all the natural numbers more than and equal to 1; the permanent magnet structures in the four rows are pairwise coupled and then are oppositely arranged at two sides in the along to which the electron beam transmits and relatively displace to form at least one combined magnetic field through which the electron beam emits elliptically polarized light, circularly polarized light or linearly polarized light in any polarizing angle of 0 to 360 degrees, and the electron velocity direction is deviated from the direction of an axis of the undulator. The undulator has the advantages that either linearly polarized light or elliptically and circularly polarized lights can be produced, and the electron velocity direction is deviated from the direction of the axis of the undulator all the times, so that the thermal load of the synchronously-radiated beam lines can be greatly reduced.

Methods and systems for making X-rays using Electron-Beam Ion Trap (EBIT) technology. A method includes extracting ions of various atomic species from an EBIT, transporting the ions through an evacuated tube, and producing x-rays by neutralizing the ions when the ions strike a conducting plate. Another method includes producing x-rays through EBIT technology and using the x-rays in a medical application. An apparatus includes an EBIT configured to emit fully ions of various atomic species, an evacuated tube configured to transport the ions, and a conducting plate configured to produce X-rays by neutralizing the ions when the ions strike the conducting plate.

An ion trap system comprises: a laser regulation and control module used for dividing a light beam into P first light beams and Q second light beams, wherein N first light beams in the P first light beams are transmitted to N ions respectively, and M second light beams in the Q second light beams are transmitted to M monitoring units respectively; the M monitoring units are used for respectively monitoring M second light beams, and thereby spatial intensity distribution information of the M second light beams is obtained; the feedback control module is used for receiving spatial intensity distribution information of the M second light beams; n first control signals are determined according to the spatial intensity distribution information of the M second light beams and transmitted to a laser regulation and control module, the N first control signals correspond to the N first light beams in a one-to-one mode, and the first control signals are used for controlling the laser regulation and control module to align the corresponding first light beams with ions. In this way, the alignment degree of the first light beam and the corresponding ion can be improved, and therefore the fidelity of quantum state control over the ion is improved.

The invention provides a system and method for coupling of ions and optical cavities. The system includes a first optical cavity, a second optical cavity and an ion trap system, wherein the ion trap system includes a DC electrode pair, a ground electrode pair and a radio frequency electrode pair, at least one ion is arranged in the ion trap system, the straight line in which the equilibrium position of at least one ion is arranged is adopted as the center line, and the center line is perpendicular to the two optical cavity mirror surfaces of the first optical cavity; and an angle is formed bythe second optical cavity and the center line, the first optical cavity is used for acquiring quantum optical signals and sending the acquired quantum optical signals to the ion trap system so that the quantum information of the quantum optical signals is transferred to the single ion in the ion trap system, and the second optical cavity is used for acquiring the quantum information of the singleion in the ion trap system. Through the technical scheme, the quantum state transfer efficiency of ions and photons is improved.

The disclosure describes various aspects of a cryogenic trapped-ion system. In an aspect, a method is described that includes bringing a chain of ions in a trap at a cryogenic temperature, the trap being a micro-fabricated trap, and performing quantum computations, simulations, or both using the chain of ions in the trap at the cryogenic temperature. In another aspect, a method is described that includes establishing a zig-zag ion chain in the cryogenic trapped-ion system, detecting a change in a configuration of the zig-zag ion chain, and determining a measurement of the pressure based on the detection in the change in configuration. In another aspect, a method is described that includes measuring a low frequency vibration, generating a control signal based on the measurement to adjust one or more optical components, and controlling the one or more optical components using the control signal.

In an undulator magnet array, an upper magnet array is formed by coupling an upper shift magnet array and an upper reference magnet array, and a lower magnet array is formed by coupling a lower reference magnet array and lower shift magnet array arranged so as to face the magnet arrays. With reference to a state where the amplitudes of periodic magnetic fields that can be formed by the upper magnet array and the lower magnet array are maximized, the upper shift magnet array is shifted ¼ of a period to the left as seen from the lower reference magnet array and the lower shift magnet array is shifted ¼ of a period to the left as seen from the upper reference magnet array.

The invention provides an ion trapping device and an ion trapping method. The ion trapping device comprises an atom generation module, an atom trapping module, an optical trap laser module and an ion trapping module. The atom generation module is used for generating an atom beam and spraying the atom beam to the atom trapping module. The atom trapping module is used for trapping the received atom beam to obtain an atom group. The light trap laser module is used for transmitting first light trap laser to the atom trapping module, loading an atomic group in the first light trap laser, and transferring the atomic group to the ion trapping module through the first light trap laser. The ion trapping module is used for trapping ions, and the ions are obtained by ionizing atomic groups from the light trap laser module. Atom groups are transferred from the atom trapping module to the ion trapping module through the first light trap laser, so that collision of trapped ions in the ion trapping module due to the fact that atomic beams are directly sprayed to the ion trapping module is avoided.

A method of performing simultaneous entangling gate operations in a trapped-ion quantum computer includes selecting a gate duration value and a detuning frequency of pulses to be individually applied to a plurality of participating ions in a chain of trapped ions to simultaneously entangle a plurality of pairs of ions among the plurality of participating ions by one or more predetermined values of entanglement interaction, determining amplitudes of the pulses, based on the selected gate duration value, the selected detuning frequency, and the frequencies of the motional modes of the chain of trapped ions, generating the pulses having the determined amplitudes, and applying the generated pulses to the plurality of participating ions for the selected gate duration value. Each of the trapped ions in the chain has two frequency-separated states defining a qubit, and motional modes of the chain of trapped ions each have a distinct frequency.

The invention belongs to the technical field of quantum computing, and provides a distributed ion trap system comprising a shell which is a polygonal cylinder, wherein an upper cover plate and a mounting plate are mounted at the two ends of the shell respectively; an ion trap is mounted in the shell, and an atom generator is mounted in the shell; the atom generator generates atoms to enter the ion trap for trapping, a plurality of laser windows are arranged on the side face of the shell, and laser window pieces are assembled on the laser windows. The plug-and-play ion trap system is provided, and the integrated laser sputtering atom generator is adopted, so that the system is particularly suitable for being applied to an ultralow-temperature ion trap system; the circuit is integrated, the ion trap device does not need to add excessive peripheral circuits, and the system is safer and more reliable; and abundant laser path windows are provided, and the ion trap support is optimally designed, so that the angle of laser entering the trap is greatly increased.

The device for producing laser-cooled atoms comprises a two dimensional trap or a three-dimensional trap, or a combination of two- and three-dimensional traps. The two-dimensional trap comprises: three or more permanent magnets arranged around a perimeter of a loop, wherein a plane of the loop is perpendicular to a free axis of the two-dimensional atom trap, and the three or more permanent magnets bracket an internal volume of the two-dimensional atom trap; and one or more laser beam input ports enabling access for one or more laser beams to the internal volume of the two-dimensional atom trap.

The invention discloses a device and a method for selectively capturing and releasing charges in vacuum. A light trap and particles are located in a vacuum chamber, the particles are stably captured in the light trap, and a grid electrode system conveys charges generated by a plasma system to the particles; the method comprises the steps that the plasma system emits and induces plasma laser to be vertically focused on the surface of a plasma target material and generate plasma, and the charges of the plasma are led out under the action of the grid electrode system, collide with the particles in the light trap in the one-way movement process and are selectively captured by the particles. Plasma is generated through laser induction, and a high-voltage electric field is prevented from being generated; meanwhile, by reasonably distributing the potential of the grid mesh electrode, the property and the electric quantity of charges moving in an electrostatic field are well controlled, so that the property of the charges captured by the particles is controlled.

The invention discloses an ion trap system, which comprises an ion trap and a vacuum cavity provided with a first optical window, wherein the vacuum cavity is further provided with a pair of second optical windows which are symmetrically distributed, the centers of the second optical windows and the center of the first optical window are located on the same plane, the first optical window provides an optical path for executing first operation, the second optical window provides an optical path for executing second operation, and the second optical window is larger than the first optical window. According to the embodiment of the invention, the pair of second optical windows used for executing the second operation are symmetrically distributed in the plane of the first optical window, so that an optical path is provided for executing the second operation, and the feasibility of executing the second operation is improved.