Development of A Resonant Excitation Coil of AC Magnetometer for Evaluation of Magnetic Fluid
Keywords:Coil, Impedance, Magnetometer, Resonant Circuit,
AbstractA high-homogeneity excitation coil with a resonant circuit for AC magnetometer is developed. A solenoid coil is designed to produce a high-homogeneity and strong excitation field using a resonant frequency method. The solenoid coil is fabricated with a Litz wire to suppress the increase of AC resistance due to the skin and proximity effects in the highfrequency region. The Litz wire is composed of 60 strands of copper wires with 0.1-mm diameter. The resonant frequency method is applied to cancel the reactance component by connecting the excitation coil with a capacitor in a series configuration. To enable excitation of the magnetic field at multiple frequencies, a resonant circuit consists of multiple values of resonant capacitors is constructed. The fabricated excitation coil showed a high homogeneity of the magnetic field and was able to maintain a constant resonant current up to 32.5 kHz.
M. M. Saari, K. Sakai, T. Kiwa, T. Sasayama, T. Yoshida, and K. Tsukada, “Characterization of the magnetic moment distribution in low-concentration solutions of iron oxide nanoparticles by a high-Tc superconducting quantum interference device magnetometer,” J. Appl. Phys., vol. 117, no. 17, p. 17B321, May 2015.
Y. Higuchi, S. Uchida, A. K. Bhuiya, T. Yoshida, and K. Enpuku, “Characterization of Magnetic Markers for Liquid-Phase Detection of Biological Targets,” IEEE Trans. Magn., vol. 49, no. 7, pp. 3456–3459, Jul. 2013.
[K. Enpuku, T. Tanaka, Y. Tamai, and M. Matsuo, “AC susceptibility of magnetic markers in suspension for liquid phase immunoassay,” J. Magn. Magn. Mater., vol. 321, no. 10, pp. 1621–1624, May 2009.
F. Ahrentorp et al., “Sensitive high frequency AC susceptometry in magnetic nanoparticle applications,” AIP Conf. Proc., vol. 1311, no. 2010, pp. 213–223, 2010.
A. Guillaume, J. M. Scholtyssek, A. Lak, A. Kassner, F. Ludwig, and M. Schilling, “Magnetorelaxometry of few Fe3O4 nanoparticles at 77K employing a self-compensated SQUID magnetometer,” J. Magn. Magn. Mater., vol. 408, pp. 46–50, 2016.
F. Ludwig, E. Heim, S. Mäuselein, D. Eberbeck, and M. Schilling, “Magnetorelaxometry of magnetic nanoparticles with fluxgate magnetometers for the analysis of biological targets,” J. Magn. Magn. Mater., vol. 293, no. 1, pp. 690–695, May 2005.
H. C. Bryant et al., “Magnetic Properties of Nanoparticles Useful for SQUID Relaxometry in Biomedical Applications.,” J. Magn. Magn. Mater., vol. 323, no. 6, pp. 767–774, Mar. 2011.
A. Tsukamoto et al., “Improvement of sensitivity of multisample biological immunoassay system using HTS SQUID and magnetic nanoparticles,” Phys. C Supercond., vol. 445–448, pp. 975–978, Oct. 2006.
A. Tsukamoto et al., “Reduction of the magnetic signal from unbound magnetic markers for magnetic immunoassay without bound/free separation,” Phys. C Supercond., vol. 463–465, pp. 1024–1028, Oct. 2007.
A. Prieto Astalan et al., “Magnetic response of thermally blocked magnetic nanoparticles in a pulsed magnetic field,” J. Magn. Magn. Mater., vol. 311, no. 1 SPEC. ISS., pp. 166–170, 2007.
P. Baranov, V. Baranova, S. Uchaikin, and Y. Pisarenko, “Creating a uniform magnetic field using axial coils system for calibration of magnetometers,” pp. 0–4, 2010.
M. M. Saari et al., “Optimization of an AC/DC High-Tc SQUID Magnetometer Detection Unit for Evaluation of Magnetic Nanoparticles in Solution,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, pp. 1–4, Jun. 2015.
K. Enpuku et al., “Performance of Pickup Coil Made of Litz Wire and Coupled to HTS SQUID,” Phys. Procedia, vol. 36, pp. 400–404, Jan. 2012.
V. Connord, B. Mehdaoui, R. P. Tan, J. Carrey, and M. Respaud, “An air-cooled Litz wire coil for measuring the high frequency hysteresis loops of magnetic samples - A useful setup for magnetic hyperthermia applications,” Rev. Sci. Instrum., vol. 85, no. 9, 2014.
P. W. Goodwill, G. C. Scott, P. P. Stang, and S. M. Conolly, “Narrowband magnetic particle imaging.,” IEEE Trans. Med. Imaging, vol. 28, no. 8, pp. 1231–7, Aug. 2009.
K. Enpuku, S. Hirakawa, R. Momotomi, M. Matsuo, and T. Yoshida, “Performance of HTS SQUID using resonant coupling of cooled Cu pickup coil,” Phys. C Supercond., vol. 471, no. 21–22, pp. 1234–1237, Nov. 2011.
T. Q. Yang and K. Enpuku, “SQUID magnetometer utilizing normal pickup coil and resonant-type coupling circuit,” Phys. C Supercond., vol. 392–396, pp. 1396–1400, Oct. 2003.
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