8results about How to "Improve radiation effect" patented technology

The invention discloses an III-group nitride device with single particle irradiation resistance. According to the invention, the hole storage layer is introduced between the buffer layer and the channel layer of the epitaxial layer structure, and the hole storage layer forms a hole potential well on the energy band structure so as to effectively collect irradiation-induced excess holes in the channel layer; meanwhile, an extraction electrode and a second source electrode are arranged to respectively collect irradiation-induced excess holes in a nearby area below the grid electrode and between the grid electrode and the source electrode. Wherein the extraction electrode is arranged between the grid electrodes which are sequentially arranged at intervals, and the extraction electrode and the second source electrode are connected with the first source electrode through the metal interconnection layer. The single particle irradiation resistance of the device can be effectively improved, the manufacturing process is compatible with the existing process, and complex process steps do not need to be additionally introduced.

The utility model discloses a cable irradiation fixing device in cable production, which comprises a support base, the output end of a second servo motor is provided with a screw rod, the screw rod is inserted in the inner wall of a chute box, the outer wall of the chute box is sleeved with a screw rod sleeve block, one side of the screw rod sleeve block is fixedly connected with a draw bar, and the draw bar is fixedly connected with the support base. The lower end of the traction rod is fixedly connected with a traction block. The fixing device for cable irradiation in cable production can drive the cable coiling shaft and the collecting coiling shaft to electrically rotate through the supporting frame, a cable body can be conveniently and stably pulled, wrapping irradiation can be carried out through the irradiation box, the device is more uniform, and the production efficiency is improved. The cable main body can be uniformly wound through left-right movement of a traction block and a traction rod on a second servo motor, a lead screw sleeve block and a lead screw, the collection efficiency is better, the cable main body can be clamped and rolled in the irradiation box through a movable clamping block, a connecting spring and a rolling shaft, the two sides can be effectively sealed, the irradiation effect is enhanced, and the use is more efficient.

The utility model relates to the technical field of flame-retardant cable processing, and discloses an irradiation cross-linking device for flame-retardant cable processing, which comprises an irradiation cross-linking device main body, connecting pipes are arranged on the left side and the right side of the irradiation cross-linking device main body, and the close ends of the left connecting pipe and the right connecting pipe penetrate through the irradiation cross-linking device main body and extend into the irradiation cross-linking device main body. A control panel is fixedly arranged on the top surface of the irradiation crosslinking device main body, an adjusting mechanism is arranged in the irradiation crosslinking device main body, a straightening mechanism is arranged on the outer side of the connecting pipe, the adjusting mechanism comprises an adjusting part and a positioning part, the straightening mechanism comprises a straightening part and a clamping part, and the reflective glass reflects ultraviolet rays generated by the ultraviolet lamp set. Ultraviolet rays can irradiate all parts of the flame-retardant cable, the irradiation effect of an ultraviolet lamp set is improved, a cooling fan cools a ventilation plate and the ultraviolet lamp set, the service life of the ultraviolet lamp set is prolonged, the ventilation plate is placed in a connecting groove of a connecting plate, and the ventilation plate and the ultraviolet lamp set are convenient to replace.

The invention provides a test device and method for fission source item release in an irradiated fuel element, and relates to the technical field of nuclear safety fission product source item tests. The test device comprises a reaction kettle, a water circulation system and a pressure stabilizing system, the water circulation system comprises a water tank, a make-up pump, a surge tank and a preheater which are sequentially connected through pipelines, the preheater is communicated with the feeding end of the reaction kettle, the surge tank is communicated with the discharging end of the reaction kettle, and a circulating pump is further arranged at the discharging end of the reaction kettle; the pressure stabilizing system comprises a gas steel cylinder and a filter which are sequentially connected through a pipeline, and the filter is respectively communicated with the pressure stabilizing tank and the reaction kettle; an ion exchange bypass and a water condensation bypass are further arranged on a connecting pipeline of the pressure stabilizing tank and the reaction kettle, an ion exchange column is arranged on the ion exchange bypass, and a condenser is arranged on the water condensation bypass. Dynamic source item tests of radionuclides can be carried out, so that nuclide release behavior researches of irradiated fuel elements in various element forms can be realized.

The utility model relates to radioactive isotope marking transportation device with prevent leaking structure, including transportation base, one end of transportation base is connected with the device shell, the top movable joint of device shell is provided with device top, device top bottom is provided with sealing strip, the inboard fixed connection of device shell has the isolation chamber, the inboard of isolation chamber is provided with prevent leaking container, the outside of prevent leaking container is provided with limit stop, limit stop bottom is provided with transmission assembly. The novel through the rotation knob, knob cooperation transmission gear A and transmission ring and and transmission gear B drive the limit stop of isolation chamber top hold prevent leaking container, prevent in the transportation process prevent leaking container to pour, and when device top is closed, the sealing strip of device top bottom surface cooperates with sealed baffle, thereby improved the sealing of device, ensure device inside and outside environment complete isolation, cause the radioactive material leakage of prevent leaking container inner wall.

This application relates to a special optical fiber, comprising a core layer and an outer cladding layer arranged sequentially from the inside to the outside along the radial direction of the special optical fiber, wherein the core layer includes a silicon nitride layer. The special optical fiber provided by this application incorporates a silicon nitride layer, disposed within the outer cladding layer. Silicon nitride has excellent thermal conductivity, enabling rapid dissipation of heat accumulated within the core / cladding layer, preventing localized hotspots that could degrade fiber quality and increasing the damage threshold. Silicon nitride remains stable at temperatures above 1200°C in an inert atmosphere and is unlikely to react with other substances, completely solving the problem of polymer carbonization. In terms of mechanical and chemical protection, silicon nitride acts as a chemical barrier. The dense, non-porous structure of the silicon nitride film gives this special optical fiber resistance to salt spray and hydrogen sulfide corrosion. Silicon nitride is a more effective Compton scatterer than silicon dioxide, reducing gamma photons incident deep within the optical fiber and improving its irradiation performance.

The utility model discloses a turn-over device in an irradiation box, which comprises a base, a first linear moving assembly, a left clamping assembly, a right clamping assembly, a second linear moving assembly, a front clamping assembly and a rear clamping assembly, the first linear moving assembly is arranged on the base, the left clamping assembly is arranged on the first linear moving assembly, and the right clamping assembly is arranged on the second linear moving assembly. The right clamping assembly is arranged on the first linear moving assembly, the second linear moving assembly is arranged on the base, the front clamping assembly is arranged on the second linear moving assembly, and the rear clamping assembly is arranged on the second linear moving assembly. According to the utility model, the first linear moving assembly, the left clamping assembly, the right clamping assembly, the second linear moving assembly, the front clamping assembly and the rear clamping assembly are arranged, so that the effect of no-dead-angle turn-over irradiation is realized; the height of the first clamping plate and the height of the second clamping plate can be adjusted so that machining equipment in irregular shapes can be clamped.

The present invention discloses a low-radioactive spherical silicon micropowder and a preparation method and application thereof, belonging to the technical field of microsilicon powder. The purity of the spherical silicon micropowder prepared by the present invention is ≥99.95%, and the content of radioactive element U is ≤1×10 ‑10 g / g, the spherical silicon micropowder is prepared by an intelligently controlled integrated system, the integrated system comprising an input device, a processing unit, a transmission device, a testing device, an execution device, a control device and an output device; wherein the input device, the processing unit and the output device are connected by a transmission device, the testing device and the execution device are installed on the inner wall, valve or external device of the processing unit, the control device performs intelligent control on the integrated system, and high-purity, low-radioactive spherical silicon micropowder is prepared by the integrated system, which can avoid secondary pollution caused by air dust or external pollution in the traditional separation preparation method, thereby ensuring the high purity and low radioactivity of the spherical silicon micropowder.