Development of a high sensitivity, inductively coupled, miniature magnetic probe array for detailed measurement of time varying magnetic field profiles in plasma flows

Magnetorheological (MR) fluids change their physical properties when subjected to a magnetic field. As this change occurs, the specific values of the physical properties are a function of the fluid’s time-varying organization state. This results in a nonlinear, hysteretic, time-varying fluid property response to direct magnetic field excitation. Permeability, resistivity and permittivity changes of MR fluid were investigated and their suitability to indicate the organizational state of the fluid, and thus other transport properties, was determined. High sensitivity of permittivity and resistivity to particle organization and applied field was studied experimentally. The measurable effect of these material properties can be used to implement an MR fluid state sensor.

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Measurement of magnetic field fluctuations within last closed flux surface with movable magnetic probe array in the JIPP T-IIU tokamak

Fusion Engineering and Design ◽

10.1016/s0920-3796(96)00552-2 ◽

1997 ◽

Vol 34-35 ◽

pp. 733-736 ◽

Cited By ~ 3

Author(s):

K Kitachi ◽

T Oike ◽

S Ohdachi ◽

K Toi ◽

R Akiyama ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Probe ◽

Flux Surface ◽

Field Fluctuations ◽

Probe Array

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Measurement of magnetic field fluctuations near plasma edge with movable magnetic probe array in CHS heliotron/torsatron

Fusion Engineering and Design ◽

10.1016/s0920-3796(96)00570-4 ◽

1997 ◽

Vol 34-35 ◽

pp. 737-740 ◽

Cited By ~ 2

Author(s):

T Oike ◽

K Kitachi ◽

S Ohdachi ◽

K Toi ◽

S Sakakibara ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Probe ◽

Plasma Edge ◽

Field Fluctuations ◽

Probe Array

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Effect of time-varying axial magnetic field on photoresist ashing in an inductively coupled plasma

Journal of Vacuum Science & Technology B Microelectronics Processing and Phenomena ◽

10.1116/1.1401746 ◽

2001 ◽

Vol 19 (5) ◽

pp. 1841 ◽

Cited By ~ 6

Author(s):

Se-Geun Park ◽

Ho-Young Song ◽

Beom-hoan O

Keyword(s):

Magnetic Field ◽

Inductively Coupled Plasma ◽

Axial Magnetic Field ◽

Time Varying ◽

Inductively Coupled

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Magnetic probe array with high sensitivity for fluctuating field

Review of Scientific Instruments ◽

10.1063/1.2709747 ◽

2007 ◽

Vol 78 (3) ◽

pp. 036105 ◽

Cited By ~ 4

Author(s):

Yuki Kanamaru ◽

Hiroshi Gota ◽

Kayoko Fujimoto ◽

Taeko Ikeyama ◽

Tomohiko Asai ◽

...

Keyword(s):

High Sensitivity ◽

Magnetic Probe ◽

Probe Array

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Radio Measurements of Coronal Magnetic Fields

International Astronomical Union Colloquium ◽

10.1017/s0252921100024933 ◽

1994 ◽

Vol 144 ◽

pp. 21-28 ◽

Cited By ~ 4

Author(s):

G. B. Gelfreikh

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Solar Corona ◽

Active Regions ◽

High Sensitivity ◽

Coronal Magnetic Field ◽

Transverse Magnetic ◽

Radio Sources ◽

Radio Waves ◽

Solar Active Regions

AbstractA review of methods of measuring magnetic fields in the solar corona using spectral-polarization observations at microwaves with high spatial resolution is presented. The methods are based on the theory of thermal bremsstrahlung, thermal cyclotron emission, propagation of radio waves in quasi-transverse magnetic field and Faraday rotation of the plane of polarization. The most explicit program of measurements of magnetic fields in the atmosphere of solar active regions has been carried out using radio observations performed on the large reflector radio telescope of the Russian Academy of Sciences — RATAN-600. This proved possible due to good wavelength coverage, multichannel spectrographs observations and high sensitivity to polarization of the instrument. Besides direct measurements of the strength of the magnetic fields in some cases the peculiar parameters of radio sources, such as very steep spectra and high brightness temperatures provide some information on a very complicated local structure of the coronal magnetic field. Of special interest are the results found from combined RATAN-600 and large antennas of aperture synthesis (VLA and WSRT), the latter giving more detailed information on twodimensional structure of radio sources. The bulk of the data obtained allows us to investigate themagnetospheresof the solar active regions as the space in the solar corona where the structures and physical processes are controlled both by the photospheric/underphotospheric currents and surrounding “quiet” corona.

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