Flat-top magnetic field generating device and method

Abstract

The invention belongs to the technical field of strong magnetic fields, and discloses a flat-top magnetic field generating device and method. The device comprises a normal-temperature magnet, a charger, a trigger circuit, a capacitor branch, a current sensor, an adjusting branch, a driving protection circuit and a controller.The capacitor branch is used for supplying power to the normal-temperature magnet; the adjusting branch is used for being equivalent to a variable resistor in adischarging process and controlling acurrent by changing acircuit impedance; and the controller is used for calculating a charging voltage of the capacitor before discharging is started, making the charger charge the capacitor, and making switch triggering of the capacitor branch according to a pre-calculated time sequence in adischarging stage. Due to afact that the normal-temperature magnet is used, compared with a superconducting magnet and low-temperature magnet low-temperature pulse magnet scheme, construction cost and maintenance cost are low; and due to the fact that negative feedback control is formed by the current sensor, anadjusting branch, the controller, adriving circuit and the like, waveform repeatability is good, and accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of strong magnetic fields, and in particular relates to a flat-top magnetic field generating device and method. Background technique [0002] With the rapid development of science and technology, strong magnetic field, as an extreme physical environment, has become a necessary condition for many industrial engineering and basic frontier scientific research. And some fields not only require high magnetic field strength, but also high requirements for the stability of the magnetic field, such as gyrotron-type terahertz wave source, nuclear magnetic resonance device, specific heat measurement experiment, electromagnetic emission, etc. [0003] Terahertz waves refer to the electromagnetic spectrum region with a frequency between 100GHz and 10THz, and have broad application scenarios in space detection, radar, high-speed data communication, biomedical imaging, and space energy transmission. Among all the methods...

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Problems solved by technology

[0012] Aiming at the defects of the prior art, the present invention provides a flat-top magnetic field generating device and method, aiming to solve the problem that the prior art cannot meet the requirements of the long-pulse width and high-power high-frequency gyrotron terahertz generating device under the premise of using a normal temperature magnet. and the magnetic field of a high-field NMR setup requires

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