7 results about "Radio-frequency quadrupole" patented technology

The utility model provides a kind of proton acceleration system, neutron generating device and isotope generating device.The proton acceleration system includes radio frequency quadrupole acceleration module, at least has radio frequency quadrupole accelerator;Drift tube linear accelerator module, at least has drift tube linear accelerator.Based on the above-mentioned proton acceleration system, first by radio frequency quadrupole acceleration module to proton beam is accelerated to handle, so that the energy of proton beam reaches first energy value;Further energy adjustment processing is carried out to the proton beam of first energy value by drift tube linear accelerator module, so that the energy of proton beam reaches the second energy value that meets requirements.

Maintainability is to be improved. A radio frequency quadrupole linear accelerator includes a tubular housing part having an outer peripheral surface at which two pairs of openings extending in an axial direction are formed facing each other, and a plurality of first vane electrodes inserted into the respective openings of the tubular housing part from outside toward an axial center, detachably attached to the openings, and disposed facing each other.

The application discloses a photochemical ionization time-of-flight mass spectrometry VOCs atmospheric on-line monitoring device and method, which comprises a complete ion generation and analysis system formed by a plurality of gas mixing cavities, photochemical ionization cavities, differential vacuum cavities, radio frequency quadrupole cavities, electrostatic lens cavities and TOF detection zones in series, and is equipped with an automatic gas path control system; the application integrates an intelligent closed-loop control system; the system uses a three-dimensional ion detection system to acquire time and space quality parameters of an ion beam in real time, combines with a current hardware state of the instrument, and calculates 12-dimensional hardware parameter adjustment instructions in real time through a convolutional neural network model; the application solves the performance drift problem of a traditional mass spectrometer caused by environmental changes through the construction of an intelligent closed loop of sensing-diagnosis-decision-execution, realizes the autonomous optimization, long-term stable and high-precision operation of the instrument, and significantly improves the automation level, accuracy and reliability of atmospheric VOCs on-line monitoring.

The application discloses a photochemical ionization time-of-flight mass spectrometry VOCs atmospheric on-line monitoring device and method, which comprises a complete ion generation and analysis system formed by a plurality of gas mixing cavities, photochemical ionization cavities, differential vacuum cavities, radio frequency quadrupole cavities, electrostatic lens cavities and TOF detection zones in series, and is equipped with an automatic gas path control system; the application integrates an intelligent closed-loop control system; the system uses a three-dimensional ion detection system to acquire time and space quality parameters of an ion beam in real time, combines with a current hardware state of the instrument, and calculates 12-dimensional hardware parameter adjustment instructions in real time through a convolutional neural network model; the application solves the performance drift problem of a traditional mass spectrometer caused by environmental changes through the construction of an intelligent closed loop of sensing-diagnosis-decision-execution, realizes the autonomous optimization, long-term stable and high-precision operation of the instrument, and significantly improves the automation level, accuracy and reliability of atmospheric VOCs on-line monitoring.

The application relates to the technical field of particle acceleration, and particularly discloses a high-repetition nanosecond beam pulsing system and method, wherein the high-repetition nanosecond beam pulsing system comprises, in sequence along a beam transmission direction, a direct current ion source, a low-energy beam transmission section, a radio frequency quadrupole field accelerator, a high-energy beam transmission section and a target chamber, adopts a three-stage structure of 'front-end pulsing + middle-stage acceleration + rear-end purification', and is helpful to stably realize high-repetition, nanosecond narrow pulse width output; through pre-chopping and post-bunching, the pulse width is ensured, and invalid particles are reduced to enter a subsequent acceleration channel; the working frequency of the radio frequency chopper is half of the target pulse repetition frequency, the difficulty of synchronous control can be reduced, time sequence accuracy and phase synchronization can be ensured, beam loss and phase disorder can be avoided, pulse time sequence consistency can be ensured, and beam utilization rate can be improved; and the high-repetition nanosecond beam pulsing is stably ensured.

The application provides a method for rapidly detecting VOCs in incineration flue gas by using a photoionization time-of-flight mass spectrometer. The method first establishes a standard curve of each component of VOCs in the incineration flue gas by using the photoionization time-of-flight mass spectrometer, then the photoionization time-of-flight mass spectrometer is used for real-time sampling and detection of the incineration flue gas sample, the sample ions are transmitted to a high-resolution reflective time-of-flight mass analyzer through a radio frequency quadrupole and an electrostatic ion transmission system, and are separated and detected according to the time-of-flight difference to the detector. The mass spectrum of each component of VOCs in the detected incineration flue gas is compared with the mass spectrum of the standard gas of each component of VOCs in the incineration flue gas, and the actual concentration of each component of VOCs in the incineration flue gas is calculated according to the standard curve of each component of VOCs in the incineration flue gas. The method can realize high-sensitivity, high-accuracy and full-coverage online monitoring of VOCs in the flue gas in the industrial incineration site, does not need to collect, purify, concentrate and other steps for the flue gas sample, and can realize real-time feedback of VOCs in the incineration flue gas.