Design and performances of a shielded liquid helium insert with an optically heated variable temperature stage for the study of low frequency magnetic noise inHTcsuperconductors

2001 ◽  
Vol 13 (3) ◽  
pp. 225-228 ◽  
Author(s):  
X. Ridereau ◽  
M. Lam Chok Sing ◽  
D. Bloyet
Keyword(s):  
Liquid Helium ◽  
Variable Temperature ◽  
Low Frequency ◽  
Magnetic Noise

On the design and implementation of a novel impedance chamber based variable temperature regulator at liquid helium temperatures

2010 ◽  
Vol 81 (4) ◽  
pp. 045112 ◽  
Author(s):  
R. Nagendran ◽  
N. Thirumurugan ◽  
N. Chinnasamy ◽  
M. P. Janawadkar ◽  
C. S. Sundar
Keyword(s):  
Liquid Helium ◽  
Variable Temperature ◽  
Temperature Regulator ◽  
Design And Implementation

scholarly journals Synchrotron and Raman Study of the Rotator Phases and Polymorphism in Tricosane Paraffin

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1341
Author(s):  
Enrique Blázquez-Blázquez ◽  
Rosa Barranco-García ◽  
María L. Cerrada ◽  
Juan C. Martínez ◽  
Ernesto Pérez
Keyword(s):  
Phase Behavior ◽  
Variable Temperature ◽  
Low Frequency ◽  
Frequency Region ◽  
Time Variable ◽  
Wide Angle ◽  
Multistage Model ◽  
X Ray ◽  
X Ray Scattering ◽  
Raman Study

A detailed study of the phase behavior of n-paraffin C23H48 has been performed by means of real-time variable-temperature experiments with synchrotron radiation. Two detectors were employed for simultaneous analysis of the small-angle (SAXS) and wide-angle X-ray-scattering (WAXS) regions. This paraffin presents a very interesting phase behavior, involving two crystal polymorphs, three rotator phases and the liquid state. The Ostwald rule of stages is invoked to find similarities of the rotator phases with the eventual transient mesomorphic structure in the multistage model of polymer crystallization. That study is complemented by variable-temperature Raman experiments covering frequencies down to 150 cm−1. It was found that the low-frequency region is the most informative regarding the phase transitions, and specifically the intensity of the first overtone. From these analyses, several parameters are evaluated as function of temperature.

scholarly journals An Extraction Method of Weak Low-Frequency Magnetic Communication Signals Based on Multisensor

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Chao Huang ◽  
Xin Xu ◽  
Dunge Liu ◽  
Wanhua Zhu ◽  
Xiaojuan Zhang ◽  
...  
Keyword(s):  
Blind Source Separation ◽  
Extraction Method ◽  
Field Experiments ◽  
Signal To Noise Ratio ◽  
Source Separation ◽  
Low Frequency ◽  
Signal Extraction ◽  
Magnetic Noise ◽  
Communication Signals ◽  
Low Snr

It is a technical challenge to effectively remove the influence of magnetic noise from the vicinity of the receiving sensors on low-frequency magnetic communication. The traditional denoising methods are difficult to extract high-quality original signals under the condition of low SNR (the signal-to-noise ratio). In this paper, we analyze the numerical characteristics of the low-frequency magnetic field and propose the algorithms of the fast optimization of blind source separation (FOBSS) and the frequency-domain correlation extraction (FDCE). FOBSS is based on blind source separation (BSS). Signal extraction of low SNR can be implemented through FOBSS and FDCE. This signal extraction method is verified in multiple field experiments which can remove the magnetic noise by about 25 dB or more.

Low frequency behaviour of soft ferromagnets at liquid helium temperature

1991 ◽  
Vol 101 (1-3) ◽  
pp. 92-94 ◽  
Author(s):  
M. Cerdonio ◽  
P. Falferi ◽  
R. Macchietto ◽  
G.A. Prodi ◽  
S. Vitale
Keyword(s):  
Liquid Helium ◽  
Low Frequency ◽  
Liquid Helium Temperature ◽  
Helium Temperature

Reduction of low frequency magnetic noise by voltage-induced magnetic anisotropy modulation in tunneling magnetoresistance sensors

2014 ◽  
Vol 105 (8) ◽  
pp. 082404 ◽  
Author(s):  
P. Wisniowski ◽  
M. Dąbek ◽  
W. Skowronski ◽  
T. Stobiecki ◽  
S. Cardoso ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Low Frequency ◽  
Tunneling Magnetoresistance ◽  
Magnetic Noise ◽  
Induced Magnetic Anisotropy
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