Flat top pulse magnetic field generation device and terahertz electromagnetic wave generation system

Abstract

The invention provides a flat top pulse magnetic field generation device and a terahertz electromagnetic wave generation system. A first power supply discharges to hollow magnet and a main magnetic field is generated. When the first power supply discharges to first preset time, an IGBT is controlled to be switched on and switched off discontinuously, a second power supply is enabled to discharge to a first compensation coil and a second compensation coil, and a compensation magnetic field is generated; at second preset time, the IGBT is switched off, and the IGBT stops discharging to the firstcompensation coil and the second compensation coil. The main magnetic field and the compensation magnetic field are overlapped to form a total magnetic field. A duty cycle for discontinuous switch-onand switch-off the IGBT is determined according to magnetic field strength of the total magnetic field in a preset time period, the magnetic fields of the total magnetic field in the preset time period are kept unchanged, and a flat top pulse magnetic field is formed. The preset time period is the time period from the first preset time to the second preset time. According to the device and the system, terahertz waves of which pulse width is above a millisecond level, frequency reaches a THz level, and power reaches a kW level can be output continuously and stably in flat top pulse duration.

Description

technical field [0001] The invention relates to the field of magnetic field technology, and more specifically, to a flat-top pulsed magnetic field generating device and a terahertz electromagnetic wave generating system. Background technique [0002] Terahertz (THz) electromagnetic radiation is at a frequency of 0.3THz-10THz (1THz=10 12 Hz) in the frequency range between millimeter waves and infrared light that has not been fully studied. Due to the special frequency range of terahertz waves, it has the characteristics of wide bandwidth, high signal-to-noise ratio, low radiation, and strong penetration. Therefore, terahertz waves have important application value in many fields such as communication, imaging, biotechnology, astronomy, physics and basic material research. However, the biggest technical problem facing the application of terahertz technology at present is that the power of the radiation source is too low to meet most application scenarios. Therefore, as the b...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that the prior art outputs terahertz electromagnetic waves based on superconducting magnets or o...

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