New Method for Broadening Divertor Heat Load by Rotating Perturbed Magnetic Field

Magnetic bead droplet's non-contacted manipulation can be realized in Electromagnetic MEMS, but how to achieve magnetic beads manipulation is the major problem. A new method of multi-layered flat coils coupled with permanent magnet was proposed. Firstly, the theory of magnetic bead manipulation was analyzed and the main factors affected the magnetic beads manipulation was identified; then the magnetic field of multi-layered flat coils and Stokes viscous resistance of magnetic beads were analyzed and simulated quantificationally; finally the magnetic bead capture area was got under different flow velocity. Consequently the feasibility and correctness of this method was verified.

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NEW METHOD OF IMPULSIVE ELECTROMAGNETIC LOGGING SOUNDING: MAPPING OF THE BAZHENOVSKAYA FORMATION FROM JURASSIC RESERVOIRS PENETRATED BY INCLINED-HORIZONTAL WELLS

GEOLOGY AND MINERAL RESOURCES OF SIBERIA ◽

10.20403/2078-0575-2021-3-31-39 ◽

2021 ◽

pp. 31-39

Author(s):

M. I. Epov ◽

◽

V. N. Glinskikh ◽

M. N. Nikitenko ◽

K. V. Sukhorukova ◽

...

Keyword(s):

Magnetic Field ◽

Numerical Modeling ◽

Middle Jurassic ◽

High Sensitivity ◽

Horizontal Wells ◽

New Method ◽

Electromagnetic Sounding ◽

Bazhenov Formation ◽

Spatial Locations

The work is devoted to the substantiation of new geophysical technology for mapping the Bazhenovskaya Formation based on an impulsive electromagnetic sounding from wells. Theoretically shown the possibility of its application to study the formation from highly inclined and subhorizontal wells drilled in the Upper and Middle Jurassic formations. Numerical modeling of the signals in realistic geoelectric models of the Bazhenov Formation with real well trajectories is carried out on the example of the East Surgut field. The calculations have established that the determination of spatial locations of the top and bottom of the beds is possible when using different-length sondes. Zones of high sensitivity of the full magnetic field matrix to the boundaries with a sufficient signal level at considerable distance, even with a small sonde length, are determined. It is theoretically established that pulsed sounding of the Bazhenov Formation from the Upper and Middle Jurassic reservoirs is feasible for both mapping the boundaries of the formation and tracing its lateral variability.

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A new method to calculate the fluxgate magnetometer offset in the interplanetary magnetic field: 2. using mirror mode structures

Journal of Geophysical Research Space Physics ◽

10.1029/2021ja029781 ◽

2021 ◽

Author(s):

Guoqiang Wang ◽

Zonghao Pan

Keyword(s):

Magnetic Field ◽

Interplanetary Magnetic Field ◽

New Method ◽

Fluxgate Magnetometer ◽

Mirror Mode

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Helicity waves propagating in a plasma

Journal of Plasma Physics ◽

10.1017/s0022377800015841 ◽

1991 ◽

Vol 45 (3) ◽

pp. 481-488 ◽

Cited By ~ 9

Author(s):

Z. Yoshida

Keyword(s):

Magnetic Field ◽

Faraday Effect ◽

Low Frequency ◽

Plasma Waves ◽

Frequency Limit ◽

High Frequencies ◽

Transverse Modes ◽

Longitudinal Part ◽

The Waves ◽

Perturbed Magnetic Field

There exist plasma waves that transport helicity although they do not propagate electromagnetic energy. The dispersion relations of such helicity waves are studied. The electric field of the waves is parallel to the perturbed magnetic field, and both are perpendicular to the perturbed current. In cross-field propagation, a helicity wave is decomposed into two transverse modes with different polarizations and a longitudinal part. The helicity waves are principally Alfvénic in the low-frequency limit. At high frequencies, the Faraday effect comes into the polarization.

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