Reflectometry is considered to be one of the key diagnostics to measure density profiles and density fluctuations of fusion oriented plasmas. When an electromagnetic wave is launched into a plasma, the wave is reflected at the corresponding cutoff layer of the ordinary (O) mode or the extraordinary (X) mode. Reflectometry measures the time of flight (TOF) or group delay of the reflected wave. W...

Introducing a new hobby for other people may inspire them to join with you. Reading, as one of mutual hobby, is considered as the very easy hobby to do. But, many people are not interested in this hobby. Why? Boring is the reason of why. However, this feel actually can deal with the book and time of you reading. Yeah, one that we will refer to break the boredom in reading is choosing broadband ...

Analog correlation is an important analog signal processing function. A new analog correlator circuit for implementing Spread Spectrum Time Domain Reflectometry (SSTDR) technique is proposed. SSTDR technique, makes locating intermittent faults possible, by continuously testing live wiring networks. The proposed correlator circuit is more linear by almost an order of magnitude and consumes half ...

Due to hydrogen possessing a relatively large neutron scattering length, hydrogen absorption and desorption behaviors in metal thin films can straightforwardly be investigated by neutron reflectometry. However, to further elucidate the chemical structure of the hydrogen absorbing materials, complementary techniques such as high resolution X-ray reflectometry and diffraction remain important too...

The broadband capability of a DSL is dependant on the copper access network. Single Ended Loop Testing (SELT) is the most preferred and economical way in estimating the copper loop topology. The combined use of complementary code based Correlation Time Domain Reflectometry (CTDR) and Frequency Domain Reflectometry (FDR) for accurate loop topology estimation is presented in this paper. The advan...

Detecting dental calculus is clinically challenging in dentistry. This study used typodonts with extracted premolar and molar teeth and simulated gingival tissue to compare the performance of differential reflectometry and periodontal probing. A total of 30 extracted teeth were set in an anatomical configuration in stone to create three typodonts. Clear polyvinyl siloxane impression material wa...

area of research, dealing with diagnostic and monitoring the health of the electrical transmission networks and find automatically the failures. One of the recently developped (NDT) techniques is Time Domain Reflectometry methods, they are quite efficient for detecting important damages (hard faults), such as short or open-circuits. Interpreting the results obtained with reflectometry instrumen...

The perpendicular density fluctuation spectrum in the tokamak ASDEX Upgrade was measured with Doppler reflectometry. In this paper, extensive plasma turbulence and microwave propagation simulations with the GENE gyro-kinetic code and the IPF-FD3D full-wave code were undertaken to explain the observed spectral shape. It was shown that in this case the X-mode polarisation suffers both from a larg...

We have used time-dependent magnetization measurements to probe the asymmetry in the magnetizationreversal mechanisms in exchange-biased MnF2 /Fe bilayers. Analysis of the magnetic viscosity on the magnetizing and demagnetizing sides of the exchange-shifted hysteresis loops reveals a striking asymmetry. This is due to different mechanisms for reversal on the two sides of the loop as elucidated ...