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Liquid metal experiments on the helical magnetorotational instability
Frank Stefani, Gunter Gerbeth, Thomas Gundrum +3
The magnetorotational instability (MRI) plays an essential role in the formation of stars and black holes. By destabilizing hydrodynamically stable Keplerian flows, the MRI trigger…
History and results of the Riga dynamo experiments
Agris Gailitis, Gunter Gerbeth, Thomas Gundrum +3
On 11 November 1999, a self-exciting magnetic eigenfield was detected for the first time in the Riga liquid sodium dynamo experiment. We report on the long history leading to this…
Experiments on the magnetorotational instability in helical magnetic fields
Frank Stefani, Thomas Gundrum, Gunter Gerbeth +3
The magnetorotational instability (MRI) plays a key role in the formation of stars and black holes, by enabling outward angular momentum transport in accretion disks. The use of co…
The traveling wave MRI in cylindrical Taylor-Couette flow: comparing wavelengths and speeds in theory and experiment
Guenther Ruediger, Rainer Hollerbach, Frank Stefani +3
We study experimentally the flow of a liquid metal confined between differentially rotating cylinders, in the presence of externally imposed axial and azimuthal magnetic fields. Fo…
Experimental evidence for magnetorotational instability in a helical magnetic field
Frank Stefani, Thomas Gundrum, Gunter Gerbeth +4
A recent paper [R. Hollerbach and G. Rudiger, Phys. Rev. Lett. 95, 124501 (2005)] has shown that the threshold for the onset of the magnetorotational instability (MRI) in a Taylor-…