248 results about "Radiation resistance" patented technology

The invention relates to the technical field of SRAM (Static Random Access Memory) memory anti-radiation testing, and discloses an SRAM memory anti-radiation testing method and system based on running state injection, and the method comprises the following steps: system initialization, mapping preparation and time sequence baseline establishment; carrying out model quantitative compiling, sensitivity analysis and physical bit candidate generation; generating a running state injection plan and loading a test case; performing operation state execution, disturbance injection and synchronous monitoring acquisition; multi-source triggering, weight read-back and fault decoupling judgment are carried out; and performing quantitative evaluation on anti-radiation performance, constructing a degradation curve and outputting a report. The system corresponds to the method. According to the invention, a hardware-in-the-loop operation state injection and online evaluation technology is constructed, and the technical problems of guidance and position limited disturbance / equivalent irradiation injection based on weight bit level sensitivity and logic-physical mapping are solved.

The invention discloses a diamond piezoresistive material and pressure sensing application thereof, and particularly relates to a boron-doped diamond-based piezoresistive material and an application method thereof in a sensor, a gradient doping structure and heterogeneous layer design are adopted, and the diamond piezoresistive material with high sensitivity, high linearity, temperature stability, corrosion resistance and radiation resistance is constructed; by optimizing a CVD process and a pattern etching structure, stable piezoresistive response in an environment of-60 DEG C to 250 DEG C is realized, the cycle life exceeds 10 times, and the high-reliability piezoresistive sensor is suitable for high-reliability sensing devices under extreme working conditions such as aerospace engines, deep sea detection equipment and nuclear reactors.

The invention discloses a radiation-resistant protective cable for a nuclear power station and a preparation method thereof, and belongs to the technical field of cables, the radiation-resistant protective cable for the nuclear power station comprises a cable body and a sheath layer, and the sheath layer comprises the following components in parts by mass: 100 parts of polypropylene resin, 20-40 parts of ethylene propylene diene monomer and 5-12 parts of modified multi-walled carbon nanotubes. 8-15 parts of a heat conduction enhancer, 2-6 parts of an antioxidant, 1-3 parts of a heat stabilizer and 4-8 parts of a plasticizer; the heat conduction reinforcing agent is prepared by carrying out surface modification on composite powder of aluminum nitride and boron nitride through a silane coupling agent. Through the synergistic effect of the modified multi-walled carbon nanotubes and the surface modified heat-conducting enhancer, the heat-conducting property, radiation resistance and heat stability of the cable are remarkably improved on the premise of keeping excellent electrical insulation property.

The invention relates to a high-temperature-resistant and radiation-resistant armored coaxial radio frequency cable, which comprises a copper core, a first stainless steel tube, a silicon dioxide micro powder layer, a second stainless steel tube, a copper tube and an outer shielding protection tube which are sequentially arranged from inside to outside, the silicon dioxide micro powder layer is filled in a gap between the first stainless steel tube and the second stainless steel tube, the copper tube wraps the second stainless steel tube, and the outer shielding protection tube wraps the copper tube. The armored coaxial radio frequency cable is small in outer diameter, has good radiation resistance, high temperature resistance and high signal transmission stability, and can meet the insulation requirements of high-temperature scenes such as nuclear power and the like.

The invention belongs to the technical field of narrow-band optical radiation imaging, and particularly relates to a narrow-band EUV and BEUV radiation imaging device based on a nano polycrystalline hexagonal boron nitride scintillator. The imaging device is composed of a nano polycrystalline hexagonal boron nitride scintillator plated with Zr, Mo or Nb metal, a high-precision camera, a vacuum interface flange and a shielding shell, and narrow-band selective imaging can be achieved in the wave band of 6-14 nm. The radiation imaging device has high sensitivity, narrow-band selectivity and excellent radiation resistance to 13.5 nm EUV light and 6.7 nm BEUV light, and compared with a traditional YAG-based imaging device, the radiation imaging device has remarkable advantages. The invention provides an innovative solution for high-performance EUV and BEUV radiation imaging, and has important application value in the field of EUV and BEUV beam diagnosis.

The invention relates to the technical field of photovoltaic adhesive films, and discloses an anti-radiation photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module. The adhesive film is of a multi-layer co-extrusion composite structure formed by co-extrusion molding and irradiation, and comprises an upper surface layer, a middle functional layer and a lower surface layer, the upper surface layer is a radiation-resistant polymer matrix (such as EVA-g-St, EVA-g-(alpha-MeSt), POE-g-St and an EVA / POE-aromatic resin blend); the middle functional layer comprises a packaging resin matrix, an anti-radiation agent (which is a nano-scale radiation protection material such as a rare earth oxide, a heavy metal oxide, a boron-containing compound and a polymer derivative of a benzotriazole type ultraviolet absorbent) and a stabilizer; and the lower surface layer is a bonding surface layer formed by light-transmitting bonding resin. The adhesive film is good in radiation resistance, the light transmittance, the cohesiveness, the elongation at break retention rate, the yellowing resistance, the power attenuation resistance of a component and the like after accelerated radiation are obviously improved, and the service life of the component under strong radiation can be prolonged.

The invention relates to the technical field of cooling of particle accelerators and nuclear power equipment, and discloses a cooling device suitable for high-power rays, which comprises an absorber assembly, a cooling water system assembly, a vacuum tube assembly, a shield assembly and a support assembly. The absorber assembly is formed by welding internal graphite and external copper through a brazing process, and air holes penetrating to a graphite layer are formed in the copper and communicated with an air cavity in the graphite to form a vacuum sealing cavity. The cooling water system assembly comprises a water segregator with two layers of water inlet ring cavities and two layers of water outlet ring cavities, and uniform flow distribution is ensured. And the absorber cooling water pipe is embedded into the copper and is connected with the U-shaped pipe to form a cooling loop. The electron beam bombards the graphite to generate heat, and the heat is transferred to the copper and taken away by cooling water in the cooling water pipe embedded in the copper. The shield assembly is arranged around the vacuum tube assembly to prevent radiation leakage. The cooling device realizes effective heat dissipation of 8GeV high-power rays, and has excellent radiation resistance and extremely long fatigue life.

The invention discloses a target detection network radiation hardening method for a space spacecraft AI chip, and belongs to the technical field of neural network radiation resistance. The method comprises the following steps: acquiring a target detection network model; a Dropout enhancement model and an exponential bit quantization optimization model are adopted respectively; and carrying out target detection in a space environment by adopting the optimized model. According to the method, the robustness of the neural network in the space radiation environment can be remarkably improved, the reasoning precision and speed of the model can be kept, the problem of reliable operation of the deep learning model in the space environment is solved, and the stability and task success rate of a spacecraft intelligent system are optimized. Aiming at the problem of single event upset caused by high-energy particle radiation in a space environment, the invention provides a training-reasoning collaborative optimization strategy, and provides reliable guarantee for AI application on a spacecraft.

The invention provides an automatic detection system for anti-radiation performance of a lead garment, a lead garment hanger adopts a humanoid structure design and is used for simulating the condition that the lead garment is worn in a human body posture, a plurality of X-ray detectors are arranged on the outer surface of the lead garment hanger and are used for detecting the X-ray penetration position and measuring the X-rays, and the X-ray detector is used for detecting the radiation resistance of the lead garment. The rack guide rail is detachably assembled on a CT operation site and arranged at the bottom of the lead clothes hanger, the lead clothes hanger can reciprocate along the rack guide rail through a first driving motor and can rotate circumferentially through a second driving motor, and the main control module comprises a single chip microcomputer and is used for controlling the lead clothes hanger to move horizontally and rotate. And the X-ray penetration position and the X-ray measurement in the lead clothes are determined through fitting calculation. According to the lead clothes damage detection method, the lead clothes damage detection method during wearing by simulating the human body posture can be realized, the authenticity and reliability of lead clothes damage detection are effectively improved, and unnecessary damage of rays to the human body caused by internal damage of the lead clothes is prevented.

The application provides a method for regulating halogen perovskite microstructure at a frozen temperature by using a laser and an electric field, and relates to a device, which is a customized TEM in-situ sample rod equipped with a laser optical fiber and a liquid nitrogen Dewar bottle, and a Nd:YAG pulse laser system with a wavelength of 532 nm, adjustable pulse frequency and a pulse duration of 7 ns coupled into a transmission electron microscope through the optical fiber; first, at a frozen temperature, perovskite nanocrystals are etched by controlling the energy, frequency and action time of the pulse laser, then at the frozen temperature, the small crystal nucleus rotation of the perovskite nanocrystals is controlled by using a low-energy pulse laser and applying an electric field, and the perovskite nanocrystals are recrystallized along specific crystal faces, so that perovskite nanocrystals with specific exposed surfaces, reduced microstructure defects and increased radiation resistance are obtained, and the method has great value for large-scale industrial production.

The environment-friendly nuclear power high-voltage power cable comprises a cable body, and the cable body comprises a conductor, a semi-conductive shielding layer, an insulating layer, a filling layer, a belting layer, a waterproof layer, an armor layer and an outer protective layer from inside to outside in sequence; the semi-conductive shielding layer is made of a low-smoke halogen-free cross-linked polyolefin semi-conductive material; the insulating layer is made of a radiation-resistant low-smoke halogen-free cross-linked polyolefin composite material; the filling layer is a low-smoke halogen-free polypropylene filling rope; the belting layer is made of a low-smoke halogen-free polypropylene and water-based butyl rubber composite material; the semi-conductive shielding layer tightly wraps the outer side of the conductor, the semi-conductive shielding layer is made of a low-smoke halogen-free cross-linked polyolefin semi-conductive material, is used for uniformizing an electric field on the surface of the conductive wire core and preventing point discharge, and is firmly bonded with the adjacent insulating layer, and the insulating layer is made of a radiation-resistant low-smoke halogen-free cross-linked polyolefin composite material, so that the radiation-resistant low-smoke halogen-free cross-linked polyolefin semi-conductive material has good radiation resistance. And the arrangement of the filling layer, the belting layer and the outer sheath layer improves the comprehensive performance of the cable body and meets the halogen-free, low-smoke, low-toxicity and environment-friendly requirements of the cable.

This invention discloses a remotely replaceable radiation-resistant pan-tilt camera, comprising: a fixed bracket with a wiring compartment fixedly mounted at its end; a pitch-rotation pan-tilt compartment mounted on the top surface of the wiring compartment; and a periscope lens compartment detachably mounted on the pitch-rotation pan-tilt compartment. The periscope lens compartment includes a fixing block, a fixing latch, a lens housing, and a lens module. Fixing latches are fixedly positioned at the center of both the left and right side walls of the lens housing. To improve the radiation resistance of the high-definition image sensor, this invention employs a three-layer shielding structure and a periscope reflective lens module to prevent direct damage to the camera sensor from radiation. The three-layer shielding structure also allows adjustment of the lens housing's center of gravity, ensuring the stability of the lens housing's pitch movement.

The invention relates to the field of nuclear cable manufacturing, in particular to a radiation-resistant cable for a nuclear power platform and a preparation method of the radiation-resistant cable. According to the nuclear cable, the five-layer structural design of conductor-insulation-shielding-polyimide film-sheath is adopted, the overlapping wrapping technology of the polyimide film is combined, and the comprehensive performance of the cable in the extreme environment of a nuclear power platform is comprehensively improved. The low-smoke halogen-free flame-retardant ethylene-propylene rubber is adopted as an insulating material, and through the cooperation of an EPDM / POE blending system and the ternary composite flame retardant, the insulating property is stable under the condition of ensuring radiation, and the flame retardant property is excellent. The sheath material is added with the intumescent flame retardant and the polysilazane modifier, so that the cable has no crack at the low temperature of-40 DEG C, the bending radius can be controlled to be less than 5 times of the outer diameter, and the cable is adaptive to the layout of a narrow cabin. Through the synergistic effect of material innovation and structural design, the balance of flame retardant property, mechanical property, radiation resistance, low temperature resistance, aging resistance and small-space applicability of the nuclear cable is realized.

The application relates to the technical field of spacecraft thermal control, and particularly provides a spacecraft multilayer heat insulation assembly thermal bridge suppression type bolt fixing structure which comprises a fixing assembly, a heat insulation bushing, a first heat insulation gasket, a second heat insulation gasket, a multilayer heat insulation assembly and a structural member; a stud passes through the second heat insulation gasket, the structural member and the multilayer heat insulation assembly in sequence; the outer surface of the stud is covered with the heat insulation bushing; the heat insulation bushing is a gradient functional composite structure; the heat insulation bushing comprises, from inside to outside, a heat insulation damping layer, a heat reflection layer and a structural enhancement radiation resistance layer; the contact surface between the second heat insulation gasket and the structural member is provided with a micro-cone array structure; the contact surface between the first heat insulation gasket and the top of the heat insulation bushing is provided with a micro-cone array structure; and the micro-cone array structure is used for filling assembly gaps and reducing solid heat conduction. The application has the advantages of low heat leakage, strong space adaptability and high thermal resistance stability.

The application discloses a Low-alpha silicon powder / benzocyclobutene chip packaging composite material, which comprises 55-60wt% of phosphonate-benzocyclobutene resin matrix, 35-40wt% of filler system and 3-5wt% of bismaleimide synergistic additive; the phosphonate-benzocyclobutene resin matrix is obtained through ring-opening metathesis polymerization of norbornene phosphonate imidazole monomer and co-curing of benzocyclobutene monomer; the filler system contains epoxy silane modified double-particle-size Low-alpha silicon powder and aluminum hypophosphite modified nano Mg(OH)2; the alpha emissivity of the epoxy silane modified double-particle-size Low-alpha silicon powder is <0.001 cph / (cm 2 ·h), U≤0.1ppm, Th≤0.2ppm. The dielectric constant of the obtained chip packaging composite material is ≤2.45@77GHz, the dielectric loss is <0.0016, and the interfacial bonding strength is ≥7.2MPa, so that the chip packaging composite material is suitable for vehicle 77GHz millimeter wave radar packaging and meets the requirements of high frequency, radiation resistance and high reliability.

The application discloses a window glass for aerospace and a preparation method thereof, and belongs to the glass field. The window glass is prepared from the following raw materials in percentage by mass: SiO2: 72-79%, B2O3: 10-15%, Na2O: 3-7%, K2O: 0.5-2%, MgO: 1-2%, SrO: 0.5-2%, BaO: 0.05-0.3%, PbO: 0.5-2%, ZnO: 0.05-0.5%, ZrO2: 0.4-1%, TiO2: 0.05-0.2%, La2O3: 0.1-0.4% and NaCl: 1-2%. The raw materials are mixed uniformly, melted, clarified and formed into glass blocks, and then annealed to obtain the glass. The application is suitable for the field of aerospace, and has excellent thermal stability and mechanical properties, and certain radiation resistance, and has good adaptability and protection to the extreme environment in the service of aerospace.

The invention relates to the technical field of cables, solves the problem that an existing aerospace cable is insufficient in vibration fatigue resistance and high-energy radiation resistance, and particularly discloses a multi-layer shielding optical fiber composite aerospace cable and a preparation method thereof.The multi-layer shielding optical fiber composite aerospace cable comprises an insulating layer, an inner shielding layer, a buffer bonding layer and an outer shielding layer which are sequentially arranged from inside to outside; a conductor core and an optical fiber bundle are arranged in the insulating layer, and the insulating layer comprises a bonding transition layer, a core insulating layer and an anti-radiation protection layer from inside to outside; the inner shielding layer comprises a nano-silver conductive film and a silicone rubber elastic layer, and the nano-silver conductive film is arranged on the inner side of the silicone rubber elastic layer; the outer shielding layer is provided with a nickel-copper alloy wire woven mesh; and the buffer bonding layer is provided with a modified polyimide adhesive layer. According to the optical fiber composite aerospace cable and the preparation process thereof, the shielding, buffering and interlayer bonding performance of the cable is guaranteed through control over the inner shielding layer, the buffering bonding layer and related preparation parameters, and the optical fiber composite aerospace cable adapts to aerospace application requirements.

This invention discloses a method and system for monitoring and resetting the software heartbeat of a spaceborne receiver. The system includes a dual-channel GNSS positioning module, a dual-channel orbit determination module, and an antifuse FPGA chip. Both the GNSS positioning module and the orbit determination module have corresponding primary and backup FLASH memory. The antifuse FPGA acts as the heartbeat monitoring and control center, connecting to the GNSS positioning module and the orbit determination module via GPIO interfaces. It receives the software heartbeat signals from each module and sends reset commands to faulty modules via reset pins. This solution solves the problems of poor radiation resistance, low fault identification accuracy, and low recovery efficiency in existing spaceborne receiver software fault monitoring.

An irradiation-resistant diamond Schottky diode and its fabrication method are disclosed. The purpose of this invention is to solve the problem of poor radiation resistance stability in Schottky diodes. In this irradiation-resistant diamond Schottky diode, p-type diodes are epitaxially grown on an intrinsic diamond substrate. + Diamond epitaxial layer, in p + An ohmic electrode is deposited in a portion of the upper surface of the diamond epitaxial layer, at p + p-type epitaxial growth is performed on the region of the diamond epitaxial layer where no ohmic electrode is deposited. ‑ Type II diamond drift layer, in p ‑ Easily oxidizable metal electrodes are deposited on a diamond drift layer, serving as Schottky electrodes. These electrodes are then terminated with oxygen. ‑ A metal oxide layer is formed between the drift layers of the diamond. This invention utilizes a low work function, easily oxidizable metal as a Schottky electrode. The low work function, easily oxidizable metal passivates the oxygen terminals on the diamond surface. The oxide layer formed on the diamond surface makes the oxygen terminals less susceptible to radiation-induced reconstruction, resulting in stronger radiation resistance.

The utility model provides a disposable percussion device of an electric initiator, relates to the technical field of striking tools, solves the problem that an electromagnetic percussion device cannot meet the disposable percussion work in special environments such as a nuclear power station, and also solves the problems that the electromagnetic percussion device is large in size and difficult to install. The disposable firing device of the electric initiator comprises a protection structure with openings in the two ends; the ignition device is positioned in the protection structure and extends out along one end; the combustible material is positioned in the cavity of the protection structure; and the piston firing pin is adjacent to the first end of the combustible material. According to the technical scheme, radiation resistance and electromagnetic interference resistance are achieved, one-time percussion work such as impacting and puncturing can be normally carried out in special environments such as a nuclear power station, and due to the fact that the percussion device is small in size and convenient to install, the percussion device can be suitable for being installed in a narrow space where numerous large-size percussion devices cannot be installed. And a convenient one-time percussion mode is provided for diversified percussion demand scenes.

The invention relates to the technical field of cables, in particular to a self-checking acid and alkali resistant nuclear cable which comprises conductors, double-layer insulation, a polyimide tape layer, a filling layer, a waterproof inner sheath and an outer sheath. The waterproof inner sheath and the waterproof outer sheath are made of acid and alkali resistant fluororubber materials, and can cope with long-term soaking of strong acid and alkali solutions under extreme accidents of a nuclear power station; through the combined design of double-layer insulation and the polyimide tape layer, the radiation resistance, high temperature resistance and flame retardance of the cable are improved, and the special working condition requirements of the nuclear power station are met; through the synergistic effect of the built-in diversion monitoring pipe, the external diversion monitoring pipe and the magnetic control reciprocating diversion pump, in cooperation with the temperature and humidity sensor and the pressure sensor, temperature, humidity and pressure state parameters in the cable can be monitored in real time, so that the running state of the cable is judged, the internal heat dissipation effect of the cable is enhanced, and when the parameters exceed a preset threshold value, the cable is protected. Early warning signals can be sent to an external monitoring terminal in time, so that workers can check hidden dangers in time, and the maintenance cost is reduced.

This invention relates to the field of power semiconductor technology, specifically to an IGBT device resistant to single-event radiation and its fabrication method. By setting a P-type buried layer region at the bottom of the second trench, the strong electric field at the bottom of the trench is effectively weakened. Simultaneously, the P-type buried layer provides additional hole pathways, accelerating the extraction process of transient electron-hole pairs generated after high-energy particle incident, thereby effectively reducing the risk of single-event burn-out and improving the reliability of the device under irradiation. Furthermore, by introducing an N-type buried layer region at the bottom of the first trench, the electron injection effect is enhanced, increasing the carrier concentration in the on-state and reducing the on-state voltage drop. This structure also helps suppress the accumulation of holes below the gate during single-event incident, weakening the transient high electric field below the gate and improving the device's single-event tolerance. By reducing the depth of the first trench, the gate capacitance of the device can be effectively reduced, increasing the switching speed and reducing switching losses. In summary, this invention maintains radiation resistance while also ensuring high-frequency electrical performance.

The utility model discloses small-sized automatic code spraying and labeling equipment for a nuclear-grade environment. The small-sized automatic code spraying and labeling equipment comprises a label paper mounting module, a label paper guide module, a label paper position detection sensor, a label stripping module, a labeling module, a traction module and a waste paper collecting module. The device is small and compact in appearance size and can be shrunk and enlarged according to the size of label paper, and the hot chamber installation requirement is met; a transmission structure of the equipment adopts a synchronous belt for transmission, and the synchronous belt adopts a polyurethane steel wire belt for transmission, so that the equipment has certain radiation resistance; the bottom paper of the label is made of PVC, and the bottom paper is transparent, so that the label is convenient to detect and has certain strength and flexibility; the labeling module adopts a V-shaped unilateral moving design and can be compatible with bottles of different specifications; the whole equipment is made of a material with relatively high radiation resistance, so that the equipment has certain radiation resistance; parts of parts of the equipment are made of aluminum materials for weight reduction design, and the equipment is lighter than ordinary equipment.

The invention provides an underwater suspension transmission platform which has irradiation resistance and comprises a functional module, a mechanical arm, a control box, a main frame, a balance module, a floating box, a video system and a driving system. And a replaceable functional module is designed at the tail end of the mechanical arm. And the functional module is used for executing an underwater maintenance task under the driving of the mechanical arm. And the control unit is remotely connected with the industrial personal computer, and is used for automatically identifying the functions of the carried function module, switching to a corresponding operation mode of the function module, controlling the video system, the driving system and the mechanical arm to execute corresponding operation in the operation mode, and transmitting related information and parameters in the control process to a screen of the industrial personal computer for displaying. According to the invention, a plurality of replaceable or expandable functional modules are designed at the tail end of the mechanical arm, so that the technical problems of high operation difficulty, unreachable local position and the like existing in long-distance maintenance operation of equipment in an existing high-radiation underwater environment are solved.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

This invention discloses a highly reliable protection and locking circuit capable of withstanding single-particle transients, belonging to the field of satellite power technology. Its key feature is that it includes at least: a trigger module that receives a signal Pro. SET Amplitude and time signals, Pro SET Amplitude and time signals with reference V REF The system compares data and outputs a trigger signal; a locking module receives the trigger signal and outputs an instruction on whether to execute the locking signal based on the trigger signal; a reset module sends a reset instruction to the locking module. This system is suitable for protection circuit design in medium and high orbit space power controllers or in high-radiation ground environments, and has the advantages of good radiation resistance, high reliability, and stable operation.

The invention belongs to the technical field of high polymer materials, and particularly relates to a radiation-resistant halogen-free flame-retardant cable material for a nuclear power station cable and a preparation method thereof. The cable material is prepared from the following components in parts by mass: 50 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene propylene diene monomer, 20 parts of ethylene-octylene copolymer, 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 3 to 6 parts of silicone master batch, 180 to 220 parts of active magnesium hydroxide, 40 to 60 parts of bismuth hydroxide, 10 to 20 parts of flame-retardant synergist, 3 to 6 parts of main antioxidant and 1 to 3 parts of auxiliary antioxidant. 2 to 4 parts of TAIC (triallyl isocyanurate) and 3 to 6 parts of octaphenylcyclotetrasiloxane; the cable material has excellent radiation-resistant stability, halogen-free environment-friendly flame retardance, balanced mechanical properties and long-term thermal stability, the preparation process is simple, and the cost is controllable.

According to the optical-grade irradiation-resistant PETG polyester product and the preparation method thereof, through catalyst system innovation and a multi-stage stabilization process, synchronous improvement of low chromaticity (b value is smaller than or equal to 0.5), high light transmittance (larger than or equal to 95%) and irradiation resistance (delta YI is smaller than or equal to 1.0) is achieved, and the contradiction between optical performance and stability in the prior art can be solved. Special equipment is not needed, the existing PETG production line can be implemented only by adjusting the formula of the catalyst and the auxiliary agent, and the industrialization cost is low. The double requirements of the fields of medical equipment sterilization, aerospace optical windows, high-end packaging and the like on the irradiation resistance and the optical performance of the material can be met, and the market prospect is wide.

The present application relates to a kind of high radiation resistance of control rod for stack entropy rare earth zirconate ceramic material and its preparation method and application, belong to nuclear reactor neutron absorption rod material technical field.The control rod ceramic material provided by the present application is prepared by using europium oxide, dysprosium oxide, thulium oxide and zirconium oxide as raw materials, according to certain proportion, after ball milling, calcination, green body forming and green body sintering process, and then processing to obtain the middle entropy rare earth zirconate ceramic material that can be applied to control rod.The rare earth zirconate ceramic material has excellent radiation resistance, large neutron absorption cross section and low reactivity value loss, and has high density, excellent thermal conductivity and low thermal expansion coefficient, and shows good application prospect in the field of control rod materials.

This invention discloses a SRAM memory cell hardened based on FDSOI technology and its single-event effect evaluation method, mainly addressing the problem of decreased radiation resistance performance under low critical charge conditions in existing technologies. It includes: a pair of cross-coupled memory inverters, a memory node, and symmetrical accessors. The memory inverter includes two series-connected PMOS transistors and two series-connected NMOS transistors, forming pull-up and pull-down branches respectively, with interlocking transistors connecting the branches. Each connection point constitutes a memory node. The accessor includes four NMOS transistors, with their sources connected to the memory node, drains connected to the bit line, and gates connected to the word line. The pair of memory inverters achieves functional complementarity of the memory nodes through cross-connection of the memory node and the gate of the series-connected transistor at the opposite end. This invention can reproduce the current tailing effect of single-event transient pulses in FDSOI devices, improve radiation resistance performance under low critical charge conditions, and achieve quantitative evaluation of radiation resistance performance. It can be used for reliability evaluation of aerospace-grade integrated circuits under space radiation environments.