Magnetic field probes for use in radio frequency plasma

Reilly, Michael P.; Lewis, William; Miley, George H.
May 2009
Review of Scientific Instruments;May2009, Vol. 80 Issue 5, p053508
Academic Journal
An impedance analyzer has been used in the characterization of a magnetic induction probe (B-dot probe) for use in plasma. The role of the impedance analyzer was to determine the frequency response of a B-dot probe up to 100 MHz. The probe was specifically designed to take measurements in rf plasma driven at 13.56 MHz. Probe sensitivity and calibration are considered based on the impedance values obtained when a B-dot probe is swept over a wide frequency range. Effects such as unbalanced loads based on transmission line inductances and termination impedance are shown to be limiting factors on the probes useful frequency range. The use of an impedance analyzer allows these effects to readily be characterized.


Related Articles

  • High frequency magnetoimpedance in Ni81Fe19/Fe50Mn50 exchange biased multilayer. da Silva, R. B.; Viegas, A. D. C.; Nascimento, V. P.; Corrêa, M. A.; Schelp, L. F.; Baggio-Saitovitch, E.; Sommer, R. L. // Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG 

    Gigahertz magnetoimpedance (MI) curves obtained in an exchange biased Ni81Fe19/Fe50Mn50 multilayer are reported. Experimental MI curves are shifted by the exchange bias field (HEB), following the features presented by the hysteresis curves. Theoretical MI curves, calculated using the classical...

  • Radio-frequency power assistance on a compact magnetohydrodynamic electrical power generator under high-density magnetic flux. Murakami, Tomoyuki; Okuno, Yoshihiro // Applied Physics Letters;8/4/2008, Vol. 93 Issue 5, p051503 

    We describe the effect of radio-frequency (rf) electromagnetic field application on a compact magnetohydrodynamic (MHD) electrical power generator under high-density magnetic flux. The rf-power assistance improves the Hall potential profile and fluid flow structure, and rectifies large-scale...

  • WHAT'S NEXT. Regenold, Stephen // Popular Science;Oct2005, Vol. 267 Issue 4, p18 

    Focuses on the development of magnetic induction technology for headphones which does not transmit data via radio frequencies instead encodes the audio in a weak magnetic field.

  • Impact of Fe doping on radiofrequency magnetotransport in La0.7Sr0.3Mn1-xFexO3. Barik, S. K.; Mahendiran, R. // Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07D728 

    We report four probe ac electrical impedance (Z) in La0.7Sr0.3Mn1-xFexO3 (x ≤ 0.15) as a function of temperature (T) and magnetic field (H) in response to radio frequency (f = 0.1-5 MHz) ac current flowing directly through the sample. It is found that Z(T,H = 0) shows an abrupt increase...

  • Characterizing and calibrating a large Helmholtz coil at low ac magnetic field levels with peak magnitudes below the earth's magnetic field. Schill, Robert A.; Hoff, Karin // Review of Scientific Instruments;Jun2001, Vol. 72 Issue 6, p2769 

    Characterizing and calibrating a low impedance large Helmholtz coil generating 60 Hz magnetic fields with amplitudes well below the earth's magnetic field is difficult and imprecise when coil shielding is not available and noise is an issue. Parameters influencing the calibration process such as...

  • Magnetoacoustic tomography with magnetic induction for imaging electrical impedance of biological tissue. Xu Li; Yuan Xu; Bin He // Journal of Applied Physics;3/15/2006, Vol. 99 Issue 6, p066112 

    An experimental feasibility study was conducted on magnetoacoustic tomography with magnetic induction (MAT-MI). It is demonstrated that the two-dimensional MAT-MI system can detect and image the boundaries between regions of different electrical conductivities with high spatial resolution....

  • Numerical modeling of magnetic induction tomography using the impedance method. Ramos, Airton; Wolff, Julia // Medical & Biological Engineering & Computing;Feb2011, Vol. 49 Issue 2, p233 

    This article discusses the impedance method in the forward calculation in magnetic induction tomography (MIT). Magnetic field and eddy current distributions were obtained numerically for a sphere in the field of a coil and were compared with an analytical model. Additionally, numerical and...

  • Turning the NFC Promise Into Profitable, Everyday Applications. Huomo, Heikki // Wireless Design & Development;Sep2006, Vol. 14 Issue 9, pS3 

    The article features the near field communication (NFC) technology for wireless communication systems. NFC is based on radio frequency identification technology that uses magnetic field induction to enable communication between electronic devices in close proximity. It operates in 13.56...

  • Radiofrequency heating and magnetically induced displacement of dental magnetic attachments during 3.0 T MRI. Miyata, K.; Hasegawa, M.; Abe, Y.; Tabuchi, T.; Namiki, T.; Ishigami, T. // Dentomaxillofacial Radiology;Dec2012, Vol. 41 Issue 8, p668 

    Objective: The aim of this study was to estimate the risk of injury from dental magnetic attachments due to their radiofrequency (RF) heating and magnetically induced displacement during 3.0 T MRI. Methods: To examine the magnetic attachments, we adopted the American Society for Testing and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics