Design, construction, and calibration of a three-axis, high-frequency magnetic probe (B-dot probe) as a diagnostic for exploding plasmas

2009 ◽  
Vol 80 (11) ◽  
pp. 113505 ◽  
Author(s):  
E. T. Everson ◽  
P. Pribyl ◽  
C. G. Constantin ◽  
A. Zylstra ◽  
D. Schaeffer ◽  
...  
Keyword(s):  
High Frequency ◽  
Magnetic Probe ◽  
Dot Probe ◽  
Design Construction

Development of a thin high-frequency and high-precision magnetic probe array in Sino-United Spherical Tokamak

2021 ◽  
Vol 92 (5) ◽  
pp. 053518
Author(s):  
Zhengbo Cheng ◽  
Yi Tan ◽  
Zhe Gao ◽  
Shouzhi Wang ◽  
Binbin Wang ◽  
...  
Keyword(s):  
High Precision ◽  
High Frequency ◽  
Magnetic Probe ◽  
Spherical Tokamak ◽  
Probe Array

scholarly journals Design and construction of high-frequency magnetic probe system on the HL-2A tokamak

AIP Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 125004
Author(s):  
S. Y. Liang ◽  
X. Q. Ji ◽  
T. F. Sun ◽  
Yuan Xu ◽  
J. Lu ◽  
...  
Keyword(s):  
High Frequency ◽  
Magnetic Probe ◽  
Probe System ◽  
Design And Construction

An SOI-CMOS Active Magnetic Probe for High-Frequency Electromagnetic Emissions

2005 ◽  
Author(s):  
Satoshi Aoyama ◽  
Shoji Kawahito ◽  
Takeshi Yasui ◽  
Masahiro Yamaguchi
Keyword(s):  
High Frequency ◽  
Magnetic Probe ◽  
Electromagnetic Emissions ◽  
Soi Cmos

A 45 TO 55 Mhz Needle-Based Ultrasound System for Invasive Imaging

1993 ◽  
Vol 15 (1) ◽  
pp. 1-13 ◽  
Author(s):  
G. R. Lockwood ◽  
L. K. Ryan ◽  
F. S. Foster
Keyword(s):  
Lead Zirconate Titanate ◽  
High Frequency ◽  
Imaging System ◽  
Lead Zirconate ◽  
Parabolic Mirror ◽  
Axial Resolution ◽  
Stainless Steel Needle ◽  
Ultrasound System ◽  
Design Construction

The design, construction and fabrication of a high frequency needle-based ultrasound imaging system is described. A miniature lead zirconate titanate transducer was mounted opposite a parabolic mirror in a stainless steel needle. By inserting the needle into a tissue, a cross section image of the tissue can be made. Two needle probes were built, a 45 MHz 2.8 mm diameter probe with 125 μm lateral, 55 μm axial resolution and a 55 MHz 1.6 mm diameter probe with 105 μm lateral, 40 μm axial resolution. Preliminary phantom and in vitro tissue images demonstrate the feasibility of high frequency needle-based imaging.

An electrodynamic shaker with an integral force gauge for high-frequency measurements on lightweight structures

2000 ◽  
Vol 214 (10) ◽  
pp. 1285-1297 ◽  
Author(s):  
R M Grice ◽  
R J Pinnington
Keyword(s):  
Frequency Response ◽  
Piezoelectric Material ◽  
Response Function ◽  
High Frequency ◽  
Frequency Response Function ◽  
Dynamic Behaviour ◽  
High Frequencies ◽  
Lightweight Structures ◽  
Electrodynamic Shaker ◽  
Design Construction

The design, construction and calibration of a purpose-built electrodynamic shaker for making frequency response function measurements on lightweight structures at high frequencies (i.e. many kHz) are described. The shaker uses a conventional wire-wound coil onto which is assembled a force gauge. The force gauge is constructed using little more than just a miniature piece of piezoelectric material. The dimensions of the components used to manufacture the shaker are determined by comparing their estimated dynamic behaviour with the estimated mobility of a lightweight perspex test structure. Although such an electrodynamic shaker is not entirely novel, it demonstrates how careful use of basic materials can produce a device that overcomes some limitations of commercial devices at very little cost.

scholarly journals Experimental Studies of Plasma Confined in a Toroidal Heliac

1989 ◽  
Vol 42 (1) ◽  
pp. 73 ◽  
Author(s):  
BD Blackwell ◽  
SM Hamberger ◽  
LE Sharp ◽  
X-H Shi
Keyword(s):  
Magnetic Flux ◽  
High Frequency ◽  
Experimental Studies ◽  
Local Measurements ◽  
Gas Breakdown ◽  
Fluctuation Mode ◽  
Design Construction

The design, construction and operation of the prototype heliac SHEILA are described. Gas breakdown conditions are compared with high frequency discharges. Plasma isobars obtained from local measurements are shown to agree closely with computed magnetic flux surfaces for a range of magnetic configurations. The effect of changing the configuration on fluctuation mode numbers is demonstrated and shown to be consistent with the calculated rotational transforms.

Detection of wide band signal by a high frequency carrier-type magnetic probe

2006 ◽  
Vol 99 (8) ◽  
pp. 08B315 ◽  
Author(s):  
Kenji Tan ◽  
Kiyoshi Yamakawa ◽  
Takashi Komakine ◽  
Masahiro Yamaguchi ◽  
Yoshiki Kayano ◽  
...  
Keyword(s):  
High Frequency ◽  
Wide Band ◽  
Magnetic Probe ◽  
Band Signal

scholarly journals Design and construction of a single-axis, low-frequency magnetic probe (B-dot probe) calibrated with a LCvar Helmholtz resonant circuit

2019 ◽  
Vol 65 (5 Sept-Oct) ◽  
pp. 560
Author(s):  
M. Lindero Hernandez ◽  
A.G. Espino-Hernández ◽  
And M. Romero-Bastida
Keyword(s):  
Capacitor Bank ◽  
Low Frequency ◽  
Magnetic Probe ◽  
Helmholtz Coil ◽  
Resonant Circuit ◽  
Frequency Range ◽  
Dot Probe ◽  
Electromagnetic Devices ◽  
Sinusoidal Oscillations ◽  
Magnetic Probes

Magnetic probes (also known as B-dot coil) are electromagnetic devices used to measure magneticeld variations in many frequency ranges. The measured magnetic eld frequency directly relates tothe elected method to make the B-dot coil calibration. This work presents a B-dot coil calibration ina frequency range from 6.16 kHz to 36.63 kHz. An inductor L (Helmholtz coil) connects in parallelwith a variable capacitor bank Cvar to form a coupled LCvar resonant circuit. The LCvar circuit isfed with a half bridge oscillator. The capacitance Cvar is varied until the circuit is in resonant stateat dierent frequencies. The resonant circuit produces sinusoidal oscillations in the aforementionfrequency band. The sensitivity is calculated by using voltage Vout of the B-dot coil and voltageVH measured from Helmholtz terminals.

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