Research on the design of TMS internal cooling system based on cryogenic helium gas circulation heat transfer
A design based on low temperature helium cycle heat transfer was proposed in response to the increasing pulse current amplitude and frequency of Transcranial Magnetic Stimulation(TMS)coil application,which is accompanied by a large AC heat loss.A TMS eight-figure coil made of hollow copper wire was designed.The mechanism of liquid nitrogen precooling and low temperature helium co-cooling was used to achieve efficient heat transfer of the coil.The stimulation process of the TMS coil was discussed by constructing a heat transfer balance equation and multi-physics coupling simulation of electromagnetic heat flow.The results show that the overall heat loss of the stimulation coil after helium heat transfer is reduced by 70％compared with that without heat transfer,which realizes the low loss and efficient heat transfer of the TMS coil.It is proved that the design based on low temperature helium cycle heat transfer can be applied in TMS system.
TMSFigure-eight coilFlow heat transferCryogenic helium gasHeat loss
NETL
NSTL
万方数据
