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		题名	作者	年代	出处	被引量
	1	Numerical simulation and experiment of error field measurement using luminous trace of electron beam in SST-1显示文摘In contrast to the earlier experiments conducted in other machines, here, in SST-1 the error field measurement experiment is performed with a filled gas pressure ~8×10^-4 mbar which helped to create a luminescent toroidal beam of electron path originated due to impact excitation and guided by the toroidal magnetic field. Beam path deviations are observed and recorded from radial and top ports using visible range cameras. Such creation and detection of the electron beam path differs from the earlier works where the gun emitted electron beam deviation in ultrahigh vacuum was detected on a collector-grid/fluorescent screen. In the present experiment, large beam deviations were observed. Later investigation of the experimental set-up reveals existence of a possible source of radial electric field in between the source and the vacuum vessel which are separately grounded. Thus, to understand the observed phenomena, experiments are numerically modeled with deviated TF coil set, PF coil set and the electron source location. A particle tracing code is used to follow the electron path in the magnetic field generated by the coil set of interest. Simulation results suggest that the large deviation corresponds to the E×B drifts and not due to the large field errors. Toroidally averaged field errors of the SST-1 TF coils at toroidal field of B0?=?15 kG are negligibly small ~B0?×?10^-6 or less, which should not adversely affect the plasma performance.	Someswar DUTTA Y PARAVASTU J DHONGDE H CHUDASMA S GEORGE K DHANANI A MAKWANA C DODIYA P VARMORA D K SHARMA A K SINGH U KUMAR D RAVAL U PRASAD Z KHAN R SRINIVASAN D RAJU	2019	Plasma Science and Technology2019，21，10：	0

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