5 results about "Electron spectrometer" patented technology

The invention relates to the technical field of electron energy measurement, and discloses an electron spectrometer and an electron energy spectrum measurement method and system.The electron spectrometer comprises a magnetic deflection unit used for receiving an incident to-be-measured electron beam, generating a magnetic field and applying the magnetic field to all to-be-measured electrons in the to-be-measured electron beam; the scintillator fluorescent screen is arranged at the downstream of the magnetic deflection unit and used for receiving the deflected electrons to be detected, and the electrons bombard the scintillator fluorescent screen and generate light spots; the optical acquisition unit is used for acquiring a light spot image on the scintillator fluorescent screen; and the signal processing unit is used for processing the light spot image so as to identify the spatial position information of the light spot in the light spot image and convert the spatial position information into electronic energy data. The method has the beneficial effects that the unification of high resolution and high measurement efficiency is realized, and the problem of signal accumulation under a high counting rate of a traditional direct measurement method and the inherent defect of low efficiency of a scanning type magnetic spectrometer are overcome.

A kind of synchronous timing control system for strong laser plasma interaction experiment, including a femtosecond laser device, a square wave signal generator, a jet signal synchronizer, three delay timers, a 12-way signal synchronizer, two shutter controllers, a YAG laser, a jet controller, multiple experimental acquisition instruments including an electron spectrometer, a rear imaging CCD, a spectrometer CCD.The present application is mainly applied to the field of strong laser plasma interaction, which can accurately control the interaction time of femtosecond laser pulse and nanosecond gate plasma channel, and accurately control the start acquisition time and acquisition duration of various experimental data, improve the signal-to-noise ratio, and the whole timing system is very easy to adjust.The present application also has strong expansibility, when ionized gas is not needed to form plasma channel, the 1Hz pulse signal timing of the right half of the dashed line can be removed, so that the interaction time of femtosecond laser pulse and millisecond gate jet gas can be accurately controlled.The expansibility of the present application is also reflected in that enough output ports have been reserved, and suitable functional elements can be connected subsequently.

1. Name of the designed product: multi-channel electronic spectrometer. 2. Use of the designed product: for nuclear magnetic resonance data acquisition, simultaneously acquiring multiple data to K-space, parallel receiving and processing multi-frequency signals from different atomic nuclei. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: front view.

The application relates to the field of laser technology and discloses a high-harmonic wave and above-threshold ionization synergic regulation method and system, which adopts a fundamental frequency light and multiple auxiliary fields to form a time-space overlapping composite laser field, adjusts the wavelength, intensity, delay time and polarization direction of the auxiliary field, forms a multi-parameter laser field, takes the multi-parameter laser field as a physical action carrier, synchronously collects HHG spectral intensity distribution and ATI electron spectrum data by using a high-sensitivity spectrometer and an electron spectrometer on the basis of the multi-parameter laser field, inputs the data into a Bayesian optimization algorithm, dynamically adjusts laser parameters, obtains an optimal laser parameter combination, adjusts an electron re-collision probability by adjusting laser ellipticity based on the obtained optimal laser parameter combination, controls an electron ionization time and return energy by using a two-color field carrier envelope phase, synchronously optimizes an HHG cutoff frequency and an ATI spectrum peak position, and realizes closed-loop control; and the application realizes synergic regulation of high-harmonic wave generation and above-threshold ionization processes.

The present application provides a kind of electrostatic deflection convergent energy analyzer, it has wide receiving angle and high two-dimensional convergent performance, can carry out imaging to two-dimensional real space image or emission angle distribution, and can carry out two-dimensional convergent and imaging under 90 ° deflection relative to the direction of incidence. One or more outer electrodes and multiple inner electrodes are arranged along the shape of two rotors formed on the inner side and outer side of common rotation axis. Among them, the inner surface shape of outer electrode is tapered, the diameter of which decreases towards both ends, and the outer surface shape of inner electrode is tapered, the diameter of which decreases towards both ends. Electron entrance hole and exit hole are formed on the outer electrode at both ends of the rotation axis respectively. Voltage for electron acceleration and deceleration is applied to outer electrode and inner electrode in proportion to the energy of incident electron. Voltage is applied to one or more electrodes except the inner electrode at both ends, which is twice or more than the converted acceleration voltage obtained by converting the energy of electron into acceleration voltage based on the potential of outer electrode where entrance hole is formed.