35 results about "Heat deposition" patented technology

The invention belongs to the technical field of catalysts, and relates to a surface-reconstructed heterojunction catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving cobalt salt, ferric salt and praseodymium salt in deionized water, heating and spraying on a carrier to prepare praseodymium-doped ferrocobalt layered double hydroxide; mixing the praseodymium-doped ferrocobalt layered double hydroxide with a phosphorus source, and calcining in an inert atmosphere to prepare praseodymium-doped CoP / Fe2P; and carrying out electrooxidation treatment on the praseodymium doped CoP / Fe2P, so as to prepare the Pr6O11 cluster modified CoFeOOH heterojunction catalyst. Through cooperation of three technologies of spray thermal deposition, phosphating and electrooxidation, stable construction and electrochemical activation of a heterogeneous interface are realized, the corrosion resistance and chlorine evolution resistance competitive capacity of the catalyst in a chlorine-containing alkaline system are remarkably improved, the current density of 100 mA. Cm <-2 > can be achieved only through 223 mV overpotential, and meanwhile, stable operation is performed for 500 h.

Silicon-carbon composites obtainable by a process comprising the following steps: Step 1: Provision of one or more porous carbon particles, wherein the porous carbon particles (i) covalent organic framework compounds (COFs) are, (ii) a mean electrical particle resistance of at least 0.5 MΩ, (iii) a reversible delthiation capacity β of not more than 100 mAh / g and (iv) exhibit a mass loss of no more than 10 wt.% up to 380°C, Step 2: Thermal deposition of silicon from one or more gaseous silicon precursor(s) in the pores and / or on the surface of the porous carbon particles and, if applicable, Step 3: Deposition of additional carbon in the pores and / or on the outer surface of the silicon-carbon composites if the silicon-carbon composites after Step 2 have a specific surface area above 50 m²2 / g, wherein the silicon-carbon composites after step 2 and, if applicable, step 3 a) a specific surface area of ​​at most 50 m² 2 / g and b) have an average electrical particle resistance of at least 0.5 MΩ. Furthermore, a method for producing the silicon-carbon composites according to the invention, their use as active materials in anodes for lithium-ion batteries, anodes containing these silicon-carbon composites, and lithium-ion batteries comprising anodes containing these silicon-carbon composites are the subject of the present invention.

The present application provides a magnetic layer having a coercive force Hc of 2.00 kOe or more and a residual magnetization Mrt per unit area of 2.00 memu / cm2 or more, which is achieved without using a non-magnetic underlayer for promoting in-plane orientation of the magnetic layer and without performing heat deposition 2 The above in-plane magnetization film, in-plane magnetization film multilayer structure, hard bias layer, magnetoresistance effect element, and sputtering target. The in-plane magnetization film has: a preliminary magnetic layer (12A) containing Co, Pt, and a non-magnetic grain boundary material and having a thickness of 1 to 32 nm; and a magnetic layer main portion (12B) formed on the preliminary magnetic layer (12A) and containing Co, Pt, and a non-magnetic oxide, the above non-magnetic grain boundary material of the preliminary magnetic layer (12A) containing at least one of a Zn oxide and a Ta oxide.

The application relates to the field of heat dissipation, in particular to an anti-blocking water circulation radiator, which comprises a radiator body, a filter screen structure, a temperature sensor array and other components arranged in the body, the radiator body is provided with a hot water outlet and a cold water outlet, a specific control method is adopted to perform heat dissipation, data is collected through the temperature sensor array, a model is established to calculate heat dissipation efficiency, and a phase change material heat storage module, a fault tolerance mechanism and the like are further arranged. The application achieves the technical effects that heat dissipation conditions of the radiator can be monitored and regulated in real time, blocking can be effectively prevented, working parameters of a micro-channel pump group can be dynamically adjusted according to a heat deposition accumulation trend, heat can be temporarily stored and directionally forced to dissipate when local temperature rises too fast, the radiator simultaneously has a fault tolerance capability, and stable operation of the radiator is guaranteed.

The present invention relates to an anode heat exchange structure of a magnetic plasma thruster and a magnetic plasma thruster, belonging to the field of electric propulsion thruster design. The anode heat exchange structure of the magnetic plasma thruster includes a heat pipe and a radiation plate; the heat pipe is fixed on the anode body of the magnetic plasma thruster and contacts the anode body, and the length direction of the heat pipe is in the same direction as the central axis direction of the anode body; the radiation plate is fixedly arranged at the condensation end of the heat pipe. The heat deposition on the inner surface of the discharge chamber caused by plasma bombardment is transferred to the rear lightweight radiation plate through the heat pipe to dissipate heat to the environment, and improve the uniformity of the thruster anode temperature distribution. The radiation heat exchange structure takes away a large amount of heat deposited by the anode, prevents the anode from overheating and failure, and at the same time increases the working life, thrust and efficiency of the magnetic plasma thruster.

This invention belongs to the field of water electrolysis application technology, and relates to a high-entropy hydroxy oxide for water electrolysis and its preparation method. It can be used in the field of alkaline water electrolysis and has a significant catalytic effect on hydrogen production from alkaline water electrolysis, greatly reducing the cost of electrode preparation. It is prepared by hydrothermal deposition coupled with electrochemical reconstruction to obtain a watermelon seed-shaped co-hydroxy oxide of Fe, Co, Ni, Cu and Mo with a thickness of 0.3-1.0 μm. The specific steps of the hydrothermal deposition coupled with electrochemical reconstruction preparation method are as follows: Step (1): A certain amount of iron salt, cobalt salt, nickel salt, copper salt and citric acid are added to a mixed solution of water and ethanol. Under stirring, an aqueous solution of molybdate is added, and a molybdenum-based composite oxide is obtained by hydrothermal deposition. Step (2): The molybdenum-based composite oxide obtained in step (1) is subjected to electrochemical treatment. The molybdenum-based composite oxide is electrochemically reconstructed into a high-entropy hydroxy oxide, named FeCoNiCuMoOOH.

The application discloses a method for measuring reverse positive ion current of a high-power negative ion source, and relates to the field of high-current ion source diagnosis.The method comprises the following steps: obtaining the cooling water flow and the temperature of the cooling water on each component of the high-power negative ion source; designing and manufacturing a specific back plate for measuring the profile of the reverse positive ion current; measuring the real-time temperature rise value and the flow of the cooling water on the ion source component, and analyzing the heat deposition on each component; measuring the temperature rise value and the flow of the cooling water on each component under the condition of beam extraction, analyzing the heat deposition on each component, comparing and analyzing the power deposition change on the component bombarded by the reverse positive ion current with and without beam extraction, and obtaining the reverse positive ion current power under the operation parameter; and changing the operation parameter of the negative ion source alone, repeating the experiment, and obtaining the influence law of the parameter on the reverse positive ion current.The application provides a basis for the design and optimization of the back plate of the ion source expansion chamber and the back plate of the Faraday shield and the safe and stable operation of the high-power negative ion source.

Disclosed herein are system, apparatus, article of manufacture, method and / or computer program product embodiments, and / or combinations and sub-combinations thereof, for stimulating convective thermal recharge in a hot sedimentary aquifer (HSA) used in geothermal energy generation applications. Such convective heat transfer stimulates a convective flow field within the HSA having a convective heat transfer rate sufficient to provide a convective thermal recharge of the extracted heat, where a closed-loop geothermal energy system such as a pipe-inpipe or underground loop system may extract heat from a heat exchange fluid heated by hot fluid in the HSA.

The invention provides CVD (Chemical Vapor Deposition) coating reaction heating deposition equipment which comprises a sectional heating furnace, a reaction deposition chamber arranged in the sectional heating furnace and a rotary air supply mechanism penetrating into the reaction deposition chamber, and a plurality of layers of workpiece carriers and a preheating chamber positioned at the bottom of the workpiece carriers are arranged in the reaction deposition chamber; the rotary air supply mechanism comprises a rotary air supply shaft which axially penetrates into the reaction deposition chamber and is in running fit with the reaction deposition chamber, an air supply pipe which axially penetrates through the workpiece carrier and is in running fit with the workpiece carrier, and a rotary driving part which is connected with the rotary air supply shaft and is used for driving the rotary air supply shaft to rotate; and the rotary air supply shaft is communicated with the air supply pipe through the preheating chamber. The deposition gas is conveyed to the reaction deposition chamber, the rotary gas supply system drives the gas supply pipe to rotate to uniformly inject the deposition gas into the deposition cavity, uniform and stable deposition gas is provided for a to-be-coated workpiece placed in the reaction deposition chamber, and the deposition effect is improved; and the temperature uniformity of the whole deposition chamber is ensured by heating the furnace body in sections and controlling and adjusting the temperature in sections.

The invention relates to the technical field of boron neutron capture therapy, in particular to a lithium target device for boron neutron capture therapy and a heat exchange and dissipation method, the lithium target device comprises a V-shaped substrate, an internal water cooling flow channel and a cover plate, the cover plate is arranged on one side of the V-shaped substrate, and the internal water cooling flow channel is arranged between the V-shaped substrate and the cover plate; the V-shaped substrate is made of a material with high heat-conducting property, is V-shaped, and forms an included angle with the bombardment direction of a proton beam, so that the distribution of thermal deposition on a target surface can be effectively controlled, the influence of proton scattering can be reduced, and the target efficiency is improved to the greatest extent; when a proton beam led out by an accelerator bombards a target surface, cooling water is uniformly input into the internal water-cooling flow channel arranged between the V-shaped substrate and the cover plate, and the cooling water is divided and flows in the internal water-cooling flow channel, so that the optimal fin efficiency is achieved, and the optimal heat exchange performance of a target system is realized.

The invention discloses a method and equipment for semi-continuously producing silicon-carbon composite materials in a fluidized bed reactor through a chemical vapor deposition or thermal deposition process. The produced silicon-carbon composite material has a structure in which silicon particles are uniformly dispersed, bonded and embedded into a carbon conductive matrix and form a secondary structure. The produced silicon-carbon composite material can be used as an advanced anode material for lithium batteries and other electrochemical energy storage devices.

The invention discloses a high-heat-flow deposition component of a high-power ion source discharge cavity, which belongs to the technical field of thermal management of a neutral beam injection system of a nuclear fusion device and comprises a thermal deposition component upper plate, a thermal deposition component middle plate and a thermal deposition component lower plate which are sequentially arranged from top to bottom, grooves are formed in the upper and lower surfaces of the thermal deposition part middle plate; the thermal deposition part middle plate and the thermal deposition part upper plate are welded into a whole to form a cooling water channel; the thermal deposition component middle plate and the thermal deposition component lower plate are welded into a whole to form an air inlet channel; the air inlet channels are integrated on the two sides of the thermal deposition face of the high-heat-flow deposition component. After integral welding, an anti-electrode-pollution labyrinth structure is machined on the upper surface of the high-heat-flow deposition component, and a trapezoidal groove is formed in the outer side of the anti-electrode-pollution labyrinth structure; a magnet mounting groove is milled in the bottom of the high-heat-flow deposition component. The method solves the problems of high heat load, material thermal stress concentration and non-uniform heat dissipation of a thermal deposition part caused by upgrading and reconstruction of an ion source plan.

The application discloses a laser inertial fusion cladding and a design method thereof. The cladding is divided into a tungsten armor, a first wall, a tritium breeding self-cooling area and a back plate from near to far according to the distance from the fusion reaction center. The design method firstly establishes a simplified radial partition three-dimensional model of the cladding, then performs neutron transport calculation on the model to obtain the tritium breeding rate and the nuclear heat deposition spatial distribution of the cladding, combines material characteristics to perform thermal calculation and obtain the temperature distribution in the cladding, comprehensively considers the tritium breeding rate and the temperature distribution, adopts an optimization algorithm to determine the reasonable interval of the radial size of each functional area of the cladding, then performs fine modeling, and optimizes the design in the interval until the standard is met. The fusion cladding and the design method thereof can replace the complete cladding model in the traditional cladding engineering design with the spherical radial partition model on the basis of ensuring the accuracy, avoid the establishment of a complex model in the multi-physical field coupling calculation, optimize the design process of the cladding, and design the cladding suitable for the laser inertial confinement fusion.

The utility model discloses a civil air defense door with a ventilation structure, which relates to the technical field of civil air defense doors and comprises a door body movably connected on a frame, a ventilation slot arranged at the lower end of the door body, a cooling mechanism fixedly connected at the upper end of the door body, and a closing mechanism slidably connected at the position of the ventilation slot. A filtering mechanism fixedly connected with the door body is arranged in the ventilation groove in the direction facing the inner side of the door body. Cooling of the door body is achieved through the cooling mechanism, air circulation of an inner cavity of the door body and heat dissipation of the inner cavity of the door body are accelerated through a fan, heat deposition is avoided, and when special situations occur, baffles are driven to move in the opposite directions through a closing mechanism, ventilation grooves are shielded, and safety risks are reduced; air flowing in and out through the ventilation groove is purified and filtered, and the air quality is ensured.

The application discloses a preparation method of a phosphorus-doped silicon-based composite negative electrode material, which comprises the following steps: (1) mixing phosphorus source gas, carbon source gas and silicon source gas under an inert atmosphere at room temperature to obtain mixed gas; in the mixed gas, the volume percentage of the phosphorus source gas is 0.1-3.0%, the volume percentage of the carbon source gas is 15-28%, and the balance is the silicon source gas; (2) introducing the mixed gas into a deposition furnace in which a base material is placed, and obtaining an intermediate product after heat deposition; and (3) performing carbon coating treatment on the intermediate product, and obtaining the phosphorus-doped silicon-based composite negative electrode material after post-treatment. The application discloses the preparation method of the phosphorus-doped silicon-based composite negative electrode material, and the lithium ion battery assembled by using the prepared negative electrode material has excellent cycle stability, high reversible specific capacity and high initial coulomb efficiency.

The invention discloses an ion selective groundwater remediation system and method based on a composite adsorption material, the system comprises an in-situ PRB module, an ex-situ packed bed module and a regulating reservoir, the in-situ PRB module and the ex-situ packed bed module are both internally provided with the composite adsorption material; the composite adsorption material is composed of, by mass, 60-80% of a biochar matrix, 10-20% of a nanometer iron oxide load layer and 10-20% of a modified zeolite coating, the preparation method of the composite adsorption material comprises the steps of pyrolysis, hydrothermal deposition and surface modification, the system adopts an acid pickling-organic solvent elution-thermal regeneration combined process as a regeneration process, and the composite adsorption material is prepared through the following steps: preparing the composite adsorption material; the material cost is reduced by 40%, the adsorption capacity is improved by 3-5 times, the adsorption effect is greatly improved through twice treatment, heavy metal / organic pollution synchronous removal is achieved through the component synergistic effect, the recovery process is simplified through the magnetic separation technology, and the operation and maintenance cost is reduced.

The present disclosure relates to a device (100) for removal of contaminants from water, the device (100) includes a substrate (102), a metal layer (104) is deposited on the substrate (102) to form a conducting electrode. A thick layer of aluminium (Al) (106) is thermally deposited on the metal layer (104). The aluminum layer (106) is anodized so as to form an anodized porous alumina layer (108) having nanopores. The device, upon application of potential, allows the flow of water through the micropores to perform absorption of contaminants using the electrically conducting electrode covered with the anodized porous alumina layer facilitating removal of the contaminants from the water through ion concentration polarization and minimizing wastage of water.

The invention belongs to the technical field of high polymer materials, and discloses a high-heat-dissipation chemical-resistant anti-static new material which is prepared from the following components in percentage by mass: 40-65% of a basic resin component, 15-30% of functional filler and 1-5% of an auxiliary agent, and the high-heat-dissipation chemical-resistant anti-static new material is prepared from the following components in percentage by mass: 40-65% of a basic resin component, 15-30% of a functional filler and 1-5% of an auxiliary agent by virtue of precise parameter control of gradient pressure rise, multi-temperature-zone temperature control and The nano-scale carbon tubes, the graphene, the hexagonal boron nitride and other functional fillers are uniformly dispersed in a resin matrix to form a continuous heat conduction and dissipation network, a heat conduction and dissipation exchange channel similar to the chimney effect is constructed, an internal heat source flows to the outside in the form of air rheology to dissipate heat, the heat dissipation efficiency is greatly improved, and the corrosion resistance is excellent. The material replaces metal to become a good thermoplastic heat conduction and dissipation / static electricity / corrosion-resistant material, the problem of heat deposition on photoelectric energy, microelectronics, electric appliances, lighting, automobiles and industrial products at present is solved, and the material is full of the emerging field and wide application of diversified industrial system engineering.

The invention relates to a method for preparing a graphene / copper composite material by using solid carbon source assisted codeposition growth, which comprises the following steps: pre-cleaning and heating a substrate in a thermal evaporation system, thermally depositing metal copper on the surface of the substrate, and thermally depositing carbon atoms on the surface of the substrate by using a solid carbon source, and graphene is grown on the surface of the metal copper in the process of depositing the metal copper. According to the method, copper and carbon atoms are synchronously deposited, graphene directly grows on the surfaces of copper particles, the content of graphene in the copper-based material can be increased, and then the conductivity of the copper-based material is improved.

The present invention provides a method for preparing a nitride semiconductor material, comprising the following steps: (1) forming a high-absorption layer on one surface of a substrate; (2) depositing a nitride semiconductor material on the high-absorption layer or on the other surface of the substrate opposite to the high-absorption layer by means of microwave heating; the high-absorption layer is formed of a material having a dielectric loss factor of not less than 0.01. By the method of the present invention, uniform heat conduction of the nitride semiconductor material can be achieved. At the same time, the method of the present invention has higher energy utilization efficiency. In the method of the present invention, energy is concentrated and absorbed by the material to be heated, and the cavity of the vacuum deposition equipment will not be heated, which is beneficial to extending the maintenance and use of the equipment.

The invention discloses an ionic liquid functionalized HKUST-1 photocatalyst as well as a preparation method and application thereof, and relates to the technical field of organic catalysis, the preparation method comprises the following steps: adding a metal organic framework HKUST-1 and 1-ethylpyridine hydrobromide into an organic solvent, and carrying out reflux heating, refiltering, washing, vacuum drying and heating activation. The invention also provides the ionic liquid functionalized HKUST-1 photocatalyst and an application of the ionic liquid functionalized HKUST-1 photocatalyst in catalysis of a carbon dioxide cycloaddition reaction. The ionic liquid EPB is immobilized on the HKUST-1 material by adopting a thermal deposition method, efficient CO2 cycloaddition reaction is realized under a room-temperature photocatalytic condition, the catalytic efficiency and the reaction yield are remarkably improved, the cycle performance is excellent, and the application value is relatively high.

A high-energy micro-focus X-ray tube, comprising: a tube casing (1); a cathode assembly (3); an electron beam confinement assembly (4), the electron beam confinement assembly (4) being coaxially arranged at an electron emission end (31) of the cathode assembly (3), and the electron beam confinement assembly (4) being electrically connected to an electrical plug-in structure; a high-speed bearing assembly (6); and a rotary anode (7), the rotary anode (7) comprising an anode shank (71), a thermal deposition disc (72), a heat conduction layer (73) and a target surface layer (74). The rotary anode (7) is a reflective target structure; a small included angle is formed between an inclined surface of the target surface layer (74) and the axis of the anode shank (71), ranging from nearly parallel to 30 degrees; an included angle between the axis of the electron beam confinement assembly (4) and the inclined surface of the target surface layer (74) is not greater than 10 degrees. The high-energy micro-focus X-ray tube can withstand higher target surface power density due to fast heat dissipation while providing a larger irradiation range and smaller FOD, thus providing higher X-ray photon brightness, which means higher testing efficiency.

The invention relates to the field of heat dissipation, in particular to an anti-blocking water circulation radiator which comprises a radiator body, a body built-in filter screen structure, a temperature sensor array and other components, the radiator body is provided with a hot water port and a cold water port, and heat dissipation is executed by adopting a specific control method. For example, data are collected through a temperature sensor array, a model is established to calculate the heat dissipation efficiency, and a phase change material heat storage module, a fault tolerance mechanism and the like are further arranged. The technical effects that the heat dissipation condition of the radiator can be monitored, regulated and controlled in real time, blockage is effectively prevented, the working parameters of the micro-channel pump set can be dynamically adjusted according to the heat sink accumulation trend, heat temporary storage and directional forced heat dissipation are carried out when the local temperature rise is too fast, meanwhile, the fault-tolerant capability is achieved, and stable operation of the radiator is guaranteed are achieved.

The invention relates to an anode heat exchange structure of a magnetic plasma thruster and the magnetic plasma thruster, and belongs to the field of electric propulsion thruster design. The anode heat exchange structure of the magnetic plasma thruster comprises a heat pipe and a radiant panel; the heat pipe is fixed on an anode main body of the magnetic plasma thruster and is in contact with the anode main body, and the length direction of the heat pipe is the same as the central axis direction of the anode main body; and the radiant panel is fixedly arranged at the condensation end of the heat pipe. Thermal deposition, caused by plasma bombardment, on the inner surface of the discharge cavity is transferred to the light radiant panel at the rear end through the heat pipe to dissipate heat to the environment, and the anode temperature distribution uniformity of the thruster is improved. The radiation heat exchange structure takes away a large amount of heat of anode sedimentation, anode overheating failure is prevented, the service life of the magnetic plasma thruster is prolonged, and the thrust and efficiency of the magnetic plasma thruster are improved.

The utility model belongs to the technical field of ceramic capacitors, and particularly relates to a surface-mounted ceramic capacitor, which comprises a ceramic capacitor dielectric sheet, a first conducting layer and a second conducting layer are respectively arranged on the upper side and the lower side of the ceramic capacitor dielectric sheet, and a first metal end cap and a second metal end cap are respectively welded at one end of the first conducting layer and one end of the second conducting layer. The first metal end cap and the second metal end cap respectively wrap the two ends of the ceramic capacitor dielectric sheet, the outer side of the ceramic capacitor dielectric sheet, the outer side of the first conductive layer and the outer side of the second conductive layer are packaged with an insulation packaging body, a plurality of heat pipes are further installed in the insulation packaging body, and clamping pieces are installed on the outer sides of the heat pipes in a clamped mode. When the capacitor works, the evaporation section, the heat insulation section and the surroundings conduct heat transfer, after the evaporation section absorbs heat, an internal medium is vaporized, moves into the condensation section through capillary action, releases heat and then flows back to the evaporation section, and therefore according to different installation environments, the local heat deposition phenomenon caused by different heat dissipation efficiencies of the front face and the back face of the capacitor is solved.

The present invention belongs to the field of lighting technology, and particularly relates to a light-emitting component and a manufacturing method thereof. The light-emitting component includes a light-emitting structure, a thermoelectric conduction structure, a heat-conducting structure, and a support structure; the support structure is provided with an installation groove, the light-emitting structure, the thermoelectric conduction structure, and the heat-conducting structure are sequentially stacked and all accommodated in the installation groove; the light-emitting structure has a first electrode and a second electrode, the first electrode and the second electrode are electrically connected to the support structure and the thermoelectric conduction structure respectively, and the thermoelectric conduction structure is electrically connected to the support structure; wherein, the thermoelectric conduction structure can receive heat from the light-emitting structure and transfer the heat to the heat-conducting structure; the support structure can receive heat from the heat-conducting structure and transfer the heat to the outside. The present invention can reduce the heat deposition in the light-emitting component.

Device for solidifying a coating layer hot deposited on a wire, corresponding installation and method. The device comprises a cooling liquid injection chamber with a liquid inlet and a wire inlet, a cooling chamber with a liquid outlet and a wire outlet, and a partition arranged between the injection and cooling chambers, comprising a wire passage. It also has a conduit for separating the wire. The partition comprises channels fluidically connecting the injection chamber with the cooling chamber and leading into the center of the wire passage in an eccentric manner and being inclined forming an angle (α) with respect to a longitudinal direction. This directs a jet of cooling liquid on the wire in the direction from the injection chamber towards the cooling chamber.

The invention discloses a high-power negative ion source reverse positive ion flow measurement method, and relates to the field of high-current ion source diagnosis, and the method comprises the steps: obtaining the cooling water flow and the cooling water temperature of each component of a high-power negative ion source; a specific backboard is designed and manufactured for reverse positive ion flow profile measurement; the real-time temperature rising value and flow of cooling water on the ion source component are measured, and heat deposition on each component is obtained through analysis; the temperature rise value and the flow of cooling water on each component under the beam extraction condition are measured, heat deposition on each component is analyzed, the power deposition change on the component bombarded by the reverse positive ion current when the beam extraction condition exists or not is compared and analyzed, and the reverse positive ion current power under the operation parameters is obtained; the negative ion source operation parameters are singly changed, the experiment is repeated, and the influence rule of the parameters on the reverse positive ion flow is obtained. According to the invention, a basis is provided for design optimization of the ion source expansion chamber back plate and the Faraday shield back plate and safe and stable operation of the high-power negative ion source.

Methods and related compositions for depositing boron doped silicon germanium layers are disclosed. The method includes depositing a boron-doped silicon germanium layer by a thermal deposition process employing a composition comprising an iodosilane precursor. The method further includes depositing a boron-doped silicon germanium layer by a selective deposition process.

The application discloses a high-energy outgoing electron protection device for a neutral beam injection negative ion source, belongs to the field of the neutral beam injection negative ion source of magnetic confinement nuclear fusion, and mainly comprises a protection plate, a supporting base, a thermocouple and an infrared thermal imager. The protection plate is used for intercepting high-energy outgoing electrons. The supporting base is used for mounting and positioning the protection plate in a beam line vacuum chamber. The thermocouple is used for realizing real-time monitoring of the local temperature of the protection plate. The infrared thermal imager is used for observing a large-area heat source of the protection plate and determining the heat deposition position distribution of the high-energy outgoing electrons. The application realizes protection of heat load sensitive components such as a cryogenic pump by intercepting the high-energy outgoing electron beam and monitoring the deposition position of the high-energy outgoing electron beam, promotes the performance improvement and scheme perfection of an electron suppression means, is favorable for long-pulse stable operation of the negative ion source, and can effectively protect the high-energy outgoing electron in the neutral beam injection negative ion source.