101 results about "Fluence rate" patented technology

The present invention discloses a quantitative analysis method for a heavy-ion single-particle multi-bit upset effect of a device. The method comprises: selecting a type of heavy ions, setting an appropriate fluence rate according to a corresponding principle to perform radiation on a cover opening device, recording logic addresses and data of storage units, which perform single-particle upset, of the device by a test system, and stopping radiation when reaching an estimated single-particle upset number or the maximum ion fluence; establishing a mapping relationship from the logic addresses of the device to physical addresses, and according to a physical bit map, carrying out statistics on a number of single-particle upsets, a number of single-particle unit upset events and a number of multi-bit upset events; and by combining ion fluence, calculating parameters such as probabilities of the single-particle unit upset events and the multi-bit upset events, a multi-bit upset mean, a multi-bit upset cross section and the like. According to the quantitative analysis method for the heavy-ion single-particle multi-bit upset effect of the device, technical support and information can be provided for an anti-single-particle-upset reinforcement design of the device, and effectiveness of a reinforcement technology is verified and evaluated.

Methods, systems, and apparatuses for extracting non-polar lipids from microalgae are achieved using a lipid extraction device having an anode and a cathode that forms a channel and defines a fluid flow path through which an aqueous slurry is passed. An electromotive force is applied across the channel at a gap distance in a range from 0.5 mm to 200 mm to cause the non-polar lipids to be released from the algae cells. The non-polar lipids can be extracted at a high throughput rate and with low concentrations of polar lipids such as phospholipids and chlorophyll.

The invention belongs to the technical field of nuclear power energy, and particularly relates to a device and a method for detecting pipeline corrosion products of a pressurized water reactor nuclear power station. The device is formed by an acquiring and processing system, a rotary type measuring fixture and a computer with bundled software, wherein the acquiring and processing system is formed by a mobile monitoring platform, an x-ray generator and an x-ray detector , and a power supply, wherein the x-ray generator and the x-ray detector respectively connected with the mobile monitoring platform, and is used for measuring fluence rate and attenuation coefficient of the x-ray which penetrates through a pipeline; and the computer is connected with the mobile monitoring platform. The main principle is that: the characteristic that the attenuation degrees of deposit sediments with different thicknesses on the x-ray are different is utilized, the thickness of deposit sediments at a certain angle is inferred according to the attenuation situations of the x-ray which penetrates through the pipeline again, and the thickness of the deposit sediments at each angle in a certain pipeline with unit length is obtained through rotary measurement, so that the distribution situation of the deposit sediments on a radial section of the pipeline is obtained. The device has a simple structure, is easy to operate, and has high measurement accuracy.

Systems and methods for providing radiographic, stereoscopic and tomographic images of an object of interest. Examples of objects of interest are body parts of living beings, such as the human breast and the human chest. The apparatus includes a high-fluence rate x-ray source and a plurality of satellite x-ray sources operating at lower fluence rate than the high-fluence rate source. A controller controls the operation and locations of the sources, and the operation of a detector. The method provides procedures in which the operation of the high-fluence source and the satellite sources are individually controlled as to location and orientation relative to the object of interest. In some operations, one satellite source may be operating while another satellite source may be repositioning. By proper control, a reduced x-ray dose and reduced operating time can be attained, thereby improving image quality, patient care, and patient experience.

A method of treating a subcutaneous fat region is provided. The method includes generating electromagnetic radiation having a wavelength of about 1,200 nm to about 1,230 nm and delivering an average power density of less than or equal to about 2.3 W / cm2 of the electromagnetic radiation to the subcutaneous fat region for at least 300 seconds. The method also includes cooling an epidermal region and at least a portion of a dermal region overlying the subcutaneous fat region for at least a portion of the at least 300 seconds. The method further includes causing necrosis of at least one fat cell in the subcutaneous fat region.

A method of calibrating a PAI system (401-413) is described. The method includes a signal processing unit (404) determining optical fluence at voxels within arteries of a human or animal, and interpolating from these measurements to provide a fluence map with a fluence value for all voxels of interest. The system (404) stores the fluence map for subsequent use in making PAI measurements. The arterial optical fluence may be determined on the basis that the arterial oxygen saturation (SaO2) is the same throughout the arterial part of the circulation system.

The invention belongs to the field of nuclear technology application and particularly relates to a wide-energy-spectrum BF3 long neutron counter, the average energy response of the long neutron counter is 3.01 cm<2>, and the average relative deviation is 6.87%. An MCNP5 program is used for controlling a simulation calculation result to be within a statistical error range of 0.78 percent; the relative detection efficiency of the long neutron counter at the position 150 cm away from a point source is simulated, the relative detection efficiency is 2.05*10<-3> to 2.62*10<-3> within the energy range of 1 KeV to 15.2 MeV, the average relative detection efficiency epsilon is 2.31*10<-3>, and the average deviation is 6.84%. The long neutron counter overcomes the problems that in the prior art, the energy lower limit of a neutron counter is high, the energy response is sharply reduced in a range of above 5 MeV, the energy response flat range is not long enough and the like, and the requirements of high-flux-rate monitoring of most accelerator neutron sources or neutron fluence rate calibration of radioactive isotope neutron sources can be met.

The invention relates to a method for discriminating single-event upset of neutrons of SRAM under a pulse neutron irradiation condition. The method comprises the following steps: classifying upset bytes; performing Monte-Carlo simulated calculation on upset digits corresponding to different upset types of bytes; calculating the change curve of different upset types of bytes and the upset digits which the different upset types of bytes contain along with the accumulation of the upset digits; extracting experimental data, performing two-time upset effect correction on the experimental data points according to the curve obtained by simulated calculation to obtain the actual different upset types of bytes, the corresponding upset digits and the actual accumulated total upset digits; and comparing the corrected experimental data points and the data points of the simulated calculation curve and judging whether the pulse neutron irradiation effect accords with the single-event upset accumulation rule or not. By the method, the problem that whether the pulse neutron irradiation effect is caused by single-event upset or not is difficult to determine under the conditions of high-fluence-rate neutrons and lack of intermediate fluence point experiment data is solved.

The invention discloses a <238>U fission chamber used for measuring the neutron fluence rate of a 20MeV energy region. The invention takes the shape of a cylinder and comprises a shell (1) which is provided with an air inlet (2) and an air outlet (3), a bottom liner (5) which is electroplated with a <238>U sample (8), and a collector (6), wherein, the bottom liner (5) and the collector (6) are fixed inside the shell (1) through a strut (7); the bottom liner (5) is connected with the shell (1) and is taken as a cathode; the collector (6) is taken as an anode; signals which are collected by the collector (6) are transmitted by a signal output plug (9); the bottom liner (5) is made of stainless steels. The invention provides the <238>U fission chamber used for measuring the neutron fluence rate of the 20MeV energy region, along with a simple structure, low cost and capability of being conveniently modulated according to measuring requirements.

The present disclosure provides a method and a system for treating a tissue using photodynamic therapy (PDT). A photosensitizer is administered to the tissue and one or more optical fibers are placed in the tissue. A treatment light is applied to the tissue by way of the one or more optical fibers. A temperature of the tissue is measured during application of the treatment light, and a fluence rate of the treatment light is modified based on the temperature of the tissue. For example, the fluence rate may be modified to be lower if the temperature of the tissue is higher than a predetermined threshold.)