9 results about "High energy resolution" patented technology

This invention relates to the field of synchrotron radiation optical elements and discloses an X-ray monochromator device and an adjustment method for the X-ray monochromator device. The device includes: a base assembly; a spectroscopic crystal assembly, including a single-crystal crystal plate and two flexible connectors, the single-crystal crystal plate having a front and a back, the front being configured to face the X-ray incident direction, and the two flexible connectors symmetrically arranged on one side of the back of the single-crystal crystal plate and connecting the single-crystal crystal plate and the base assembly; a deformation detection element, which monitors the curvature change of the single-crystal crystal plate in real time and generates a feedback signal; and a loading mechanism, including at least two force-applying parts, at least two force-applying parts disposed between the two flexible connectors, at least two force-applying parts acting on the back, and the loading mechanism being able to control the at least two force-applying parts to act on the single-crystal crystal plate according to the feedback signal. This invention operates entirely at room temperature, and can achieve continuously adjustable curvature of the single-crystal crystal plate, no thermally induced lattice damage, and high energy resolution.

The invention discloses a germanium-silicon bonding type photoelectric device and a preparation method, the photoelectric device at least comprises a germanium-silicon bonding substrate, the germanium-silicon bonding substrate is formed by bombarding a germanium substrate and a silicon substrate by using a non-metal fast atomic beam at a first set pressure and a first set temperature, the surface of the germanium-silicon bonding substrate is activated, and the bonding capability is enhanced; the photoelectric device structurally comprises a germanium-silicon bonding type PIN detector, and the germanium-silicon bonding type PIN detector structurally comprises but is not limited to a germanium-silicon bonding substrate, an active region electrode, a first back electrode and a first passivation contact layer; the photoelectric device further comprises a germanium-silicon bonding type silicon drift detector, and the germanium-silicon bonding type silicon drift detector structurally comprises but is not limited to a germanium-silicon bonding substrate, a drift electrode, a collector electrode, a second back electrode and a second passivation contact layer. Compared with a traditional PIN detector with a silicon substrate or a germanium substrate and a silicon drift detector, the photoelectric device combines high energy resolution and scattering capability of germanium with low noise and high detection efficiency of silicon so as to realize better detection performance.

The invention discloses a real-time energy spectrum measurement system and method for a high radiation field environment. The system comprises an omnibearing shielding body used for blocking radiation in a high radiation field environment; the omni-directional shielding body is provided with a radiation channel. The turntable is mounted at the front end of the radiation channel and is used for controlling radiation to enter the radiation detector through the radiation channel; a plurality of collimators with different apertures are arranged on the turntable, during measurement, one required collimator is selected to be aligned with the radiation channel by rotating the turntable, and rays in a high radiation field are collimated and then enter the radiation detector through the radiation channel; when the measurement is not carried out, the turntable is rotated to shield the radiation channel; the radiation detector is arranged at the rear end of the radiation channel and is used for receiving radiation transmitted by the radiation channel; and the control and data processing unit is used for controlling the driving mechanism to rotate the turntable, and receiving and processing a signal acquired by the radiation detector. According to the invention, a distortionless and high-energy-resolution energy spectrum can be output, and the service life of equipment is prolonged.

The invention provides a scintillator structure, a detection unit, a detector and detection equipment. The scintillator structure comprises at least one scintillation crystal, at least one dielectric and / or at least one Cherenkov scintillator. The scintillation crystal and the dielectric body and / or the Cherenkov scintillator are arranged according to a preset rule. The scintillator structure can provide heterogeneous detection data to obtain data with high energy resolution and high time resolution, so that higher image quality can be provided in imaging application.

To provide a technique capable of generating an energy selection image with high energy resolution, a wide field of view, and high sensitivity.SOLUTION: The image generator includes a Wien filter 108 having a multipole structure, an operation controller 150 configured to cause the Wien filter to form an axially symmetric lens field by applying the same voltage to all of a plurality of poles while causing the Wien filter to form an electric field and a magnetic field satisfying Wien conditions, a lower shunt 120 disposed below the Wien filter 108 and having a through-hole 123, and an electron detector 107 configured to detect secondary electrons having at least a predetermined energy among secondary electrons dispersed according to energy by the Wien filter 108.SELECTED DRAWING: Figure 1

The present application relates to a kind of variable chamber time projection chamber of low-energy single-energy neutron energy measurement, low-pressure working gas is filled in sealed chamber inside;Polyethylene support column is installed in sealed chamber, and a plurality of mounting slots are provided on polyethylene support column;Multiple cathode plate support is fixed on the mounting slot of polyethylene support column, and the mounting slot position can be replaced along the direction of polyethylene support column, and the moving step of replacement is centimeter level, anode plate is arranged at the lower bottom plate of sealed chamber;Grid plate support is fixed on the mounting slot of polyethylene support column, and the mounting slot position can be replaced along the direction of polyethylene support column, and the moving step of replacement is millimeter level;Single-energy neutron and low-pressure working gas scatter to form electron-ion pair, and move to anode plate along the direction of electric field.By setting variable chamber time projection chamber, the spacing between grid plate and anode plate can be adjusted, the error of recoil nuclear angle is reduced, the energy resolution is improved, and the neutron energy measurement uncertainty can be reduced to within 10%.

The application discloses a deep space radiation neutron detector and belongs to the technical field of nuclear radiation detection. The gadolinium film captures slow neutrons to generate multi-state particles, the TPC module detects the three-dimensional tracks and energy of the inner conversion electrons and Auger electrons, the energy quantifier module detects the energy of the prompt gamma rays, and efficient and high-precision neutron detection is realized through electron-gamma coincidence measurement. The application adopts gadolinium to replace the scarce 3 He, solves the problems of low efficiency and high cost of the traditional detector, combines the track reconstruction capability of the TPC module and the high energy resolution of the energy quantifier, significantly improves the signal-to-noise ratio and detection sensitivity of the neutron signal, and is suitable for fields such as deep space exploration and nuclear radiation monitoring.

The invention provides a garnet aluminate scintillating material with high energy resolution as well as a preparation method and application thereof, and is characterized in that the scintillating material is doped with transition metal elements, and the chemical formula of the scintillating material is RE < 3-x-a-z > Ce < x > A M < z > Al < 5-y > DyO < 12 >, wherein 0 lt; x is greater than or equal to 0 and less than or equal to 2.4, 0 lt; z < = 0.1, 0 < = a < = 0.06; the rare earth element RE is selected from at least one of Gd, Lu, Y and La; d is selected from at least one of Ga, In and Sc; a is selected from at least one of Li, Mg, Ca, K, Na, Cr, Mn, Fe, Co, Ni, Yb and Nd; m is selected from at least one of Ag, Cd and Pd. The doping of dodecahedron sites is precisely regulated and controlled, the type and concentration of defects in the crystal are directionally regulated and controlled, and non-radiation loss is reduced, so that the existing performance bottleneck is broken through on the premise of keeping high light output, the light output is remarkably improved, and the energy resolution is greatly optimized.

The invention provides a CCD-based read-out control method, electronic equipment and a storage medium, and relates to the technical field of astronomical satellite-borne X-ray detection. The method comprises the steps of determining a reading working mode of the frame transfer CCD, determining a reset period of a reading end under the condition that the reading working mode is a multi-row combination reading mode, keeping a level input into the reading end as a fixed level in the reset period, determining an initial combination signal according to a level of a previous frame and a level of a target row of a current frame, and outputting the initial combination signal to the frame transfer CCD. And performing noise correction operation on the initial combined signal to obtain a target combined signal, and obtaining a first read-out result according to the target combined signal, the reset period being greater than a preset frame number interval of one frame period. The objective of the invention is to improve the problem that the existing scheme cannot guarantee high energy resolution while improving the time resolution.