68 results about "Multichannel analyzer" patented technology

A system and method for detecting a milling endpoint on a semiconductor sample by directing an ion beam from a focused ion beam (FIB) apparatus at the sample and using charge pulse detection electronics (CPDE) components to generate a distribution curve on a histogram display. A preferred configuration of the CPDE components includes a charge preamplifier, a pulse amplifier, a pulse shaper, and a multichannel analyzer (MCA).

The invention discloses a device and a method for detecting multiple elements and content thereof in water solution based on a PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology, and particularly relates to the device for detecting the content of multiple elements in the water solution by the PGNAA technology. The detection device comprises a sample detection system and an energy spectrum analysis system, wherein the sample detection system comprises an isotope neutron source, a polyethylene wrapping layer and a polyethylene bucket, the isotope neutron source is fixed at the center of the polyethylene wrapping layer, which is at the center of the polyethylene bucket, the energy spectrum analysis system comprises a gamma ray detector, a multichannel analyzer and an industrial control computer, the gamma ray detector clings to the middle high position on the outer wall of the polyethylene bucket, and the gamma ray detector is sequentially connected with the multichannel analyzer and the industrial control computer. Without a large increase in complex equipment, the method and the device can conveniently and accurately detect the content of multiple elements in the solution by the PGNAA technology.

A digital list mode multichannel analyzer (MCA) built around a programmable FPGA device for onboard data analysis and on-the-fly modification of system detection / operating parameters, and capable of collecting and processing data in very small time bins (<1 millisecond) when used in histogramming mode, or in list mode as a list mode MCA,.

An apparatus for determining fluid phase fraction of a multiphase fluid mixture (13) comprises:—a x-ray generator (20) arranged to emit a x-ray radiation spectrum comprising a low energy region and a high energy region, the high energy region including a Bremsstrahlung spectrum;—a pipe section (27) through which the multiphase fluid mixture (13) flows comprising a measurement section (28), said measurement section (28) being coupled to said x-ray generator (20);—a detector (30) coupled to said measurement section (28) and arranged to detect x-ray radiation that has passed through said multiphase fluid mixture (13), the detector (30) being coupled to a multichannel analyzer (32) producing a measurement output comprising a low energy (LE) and high energy (HE) measurement counts; wherein the measurement output further comprises a low energy (LV) and high energy (HV) control counts, in a low energy and high energy control windows located on an edge of the Bremsstrahlung spectrum, respectively; and wherein the apparatus further comprises an electrical parameter control arrangement (33) coupled to the x-ray generator (20) and the detector (30), the electrical parameter control arrangement (33) being arranged to calculate a first ratio of the high energy control count relative to the low energy control count (RV=HV / LV) and a second ratio of the high energy measurement count relative to the low energy measurement count (RE=HE / LE), and to adjust the electrical operation of the x-ray generator (20) based on an electrical parameter control function (FC(V)) of said ratios that minimize a dependence of the electrical operation of the x-ray generator on the fluid phase fraction of the multiphase fluid mixture (13) flowing in the measurement section (28).

Multiple channels of a multi-channel analyzer are allocated among multiple users such that each user can initiate and retrieve the results of separate diagnostic sessions or strategies. Each analyzer channel of the multi-channel analyzer includes an input connection port, a trace buffer memory and logic circuitry. The input connection port of each analyzer channel is operably connected to a unique node in the communication network. A host processor connected to each analyzer channel assigns ownership of a unique set of analyzer channels to at least two different users such that each user can initiate separate traces that are simultaneously established on the communication network. The logic circuitry in each analyzer channel monitors frame data on the connection port at each node in accordance with a set of instructions established by the user assigned to the analyzer channel for that node, and the traces are captured in response to the set of instructions for each analyzer channel such that each user retrieves only the results of the analyzer channels assigned to that user.

According to the present invention are disclosed a device (3) and a method for generating individual fluid samples (51) for multi-channel analysis, preferably in a diagnostic kit. A fluidic device (3), preferably a microfluidic device, has a plurality of fluidic channels (35). Fluid is transported in the fluid channel. The jumper channel (32) has a fluid inlet (33) and a fluid outlet (34). In use of said device (3), a method is carried out. According to the method, a sample channel is filled to a threshold (39) with sample fluid. A flushing fluid (gas or inert liquid) is then flushed through the sample-filled jumper channel, displacing the sample fluid with the flushing fluid. The inlet and outlet of the bridging channels are then closed and the sample fluid is pushed further into the sequence of channels (30, 31). Alternatively, a suitable pressure may be applied to the fluid such that the fluid is pushed into the sample channel. If it is desired to obtain multiple (time / space) independent sample plugs in the microchannel, the method steps are repeated in an appropriate manner. A series of longitudinally spaced individual sample fluid segments are thus created in each microchannel, separated from each other by a flushing segment.

A digital list mode multichannel analyzer (MCA) built around a programmable FPGA device for onboard data analysis and on-the-fly modification of system detection / operating parameters, and capable of collecting and processing data in very small time bins (<1 millisecond) when used in histogramming mode, or in list mode as a list mode MCA.

An apparatus for determining fluid phase fraction of a multiphase fluid mixture (13) comprises: —a x-ray generator (20) arranged to emit a x-ray radiation spectrum comprising a low energy region and a high energy region, the high energy region including a Bremsstrahlung spectrum; —a pipe section (27) through which the multiphase fluid mixture (13) flows comprising a measurement section (28), said measurement section (28) being coupled to said x-ray generator (20); —a detector (30) coupled to said measurement section (28) and arranged to detect x-ray radiation that has passed through said multiphase fluid mixture (13), the detector (30) being coupled to a multichannel analyzer (32) producing a measurement output comprising a low energy (LE) and high energy (HE) measurement counts; wherein the measurement output further comprises a low energy (LV) and high energy (HV) control counts, in a low energy and high energy control windows located on an edge of the Bremsstrahlung spectrum, respectively; and wherein the apparatus further comprises an electrical parameter control arrangement (33) coupled to the x-ray generator (20) and the detector (30), the electrical parameter control arrangement (33) being arranged to calculate a first ratio of the high energy control count relative to the low energy control count (RV=HV / LV) and a second ratio of the high energy measurement count relative to the low energy measurement count (RE=HE / LE), and to adjust the electrical operation of the x-ray generator (20) based on an electrical parameter control function (FC(V)) of said ratios that minimize a dependence of the electrical operation of the x-ray generator on the fluid phase fraction of the multiphase fluid mixture (13) flowing in the measurement section (28).

A system for detecting and identifying low-level (weak) radioactive sources moving past stationary detectors. The system, which can detect low-level sources moving at speeds of 30 m / s (about 70 mph), uses the differences between background counts and gamma counts from a moving source to determine that a source has passed the detector, when a source has passed the detector, and the identification of the source. This system has been demonstrated to work successfully for ordinary passenger vehicles transporting a variety of sources, and also for boats at lower speeds on a waterway.

The present invention relates to an automatic radioactivity analyzer of mixed liquid beta emitter which comprises: a sample preparation part (1, 2, 3, 4, 5, 6, and 7) for extracting a liquid sample from liquid-phase radioactive nuclear wastes; a sample injection part (9 and 10), including a sample transportation part for transporting a bottled sample to a radioactivity detection part to perform measurement; the radioactivity detection part (11) including two photon multiplier tubes; an exterior gamma-ray source injection part (12) for compensating for measurement efficiency according to quenching effects; a signal processing part (13), including a pre-amplifier circuit (14), a high-voltage generator circuit (15), an analogue-to-digital converter circuit (21), and a digital signal processor (DSP) (24), for generating beta spectrums by the aid of a fast coincidence counter (20) and a multi-channel analyzer (22); a main control PC (25) and a graphic user interface (GUI) program (29) for remotely automatically measuring the sample and analyzing the beta emitter; and an Ethernet communication part (28) for performing the remote-control of the analyzer and long-range reception / transmission of the measured data.

The invention discloses an intelligent multi-channel analyzer which comprises a control module and at least two analyzing and testing channels connected with the control module, wherein each analyzing and testing channel is used for analyzing and testing a to-be-detected sample according to the control of the control module, and feeding obtained detection data back to the control module; the control module is used for controlling the at least two analyzing and testing channels to simultaneously perform corresponding operations, and calculating the received detection data, and uploading a calculating result to an upper computer; and the control module is further used for responding an operation of a user to increase or reduce the number of the analyzing and testing channels connected into the analyzer. According to the intelligent multi-channel analyzer disclosed by the invention, the analyzing and testing channels independently operate, and all the channels can work in parallel, and thus a plurality of data are simultaneously measured; and meanwhile, the control module is used for controlling the increase or reduction of the number of the analyzing and testing channels connected into the analyzer, and thus the analyzing efficiency is extremely increased on the basis that the cost is saved.

A method of using constant pressure air pulse ionization chamber to detect Rn and its alpha energy spectrum includes applying a closed cavity as ionization chamber with constant pressure air pulse, leading Rn gas to be detected into cavity by connected through gas nozzle, fixing collection electrode of excellent conductor in cavity as its output and collection signal being coupled to input end of charge sensitive amplifier, connecting voltage pulse signal in direct ratio of amplitude to incoming alpha energy at output end of said amplifier to multichannel analyzer for obtaining Rn alpha energy spectrum.