The Accuracy of Donnell’s Theory for Very High Harmonic Loading on Closed Cylinders

1972 ◽  
Vol 39 (3) ◽  
pp. 836-838 ◽  
Author(s):  
S. H. Iyer ◽  
S. H. Simmonds
Keyword(s):  
High Harmonic ◽  
Harmonic Loading ◽  
Very High

scholarly journals Off-axis current drive with very high harmonic fast waves for CFETR

2020 ◽  
Author(s):  
Y. Q. Yang ◽  
X. J. Zhang ◽  
Y. P. Zhao ◽  
C. M. Qin ◽  
Y. Z. Mao ◽  
...  
Keyword(s):  
High Harmonic ◽  
Current Drive ◽  
Fast Waves ◽  
Very High

scholarly journals Frequency Spectrum Generated by Thyristor Control

1974 ◽  
Vol 1 (1) ◽  
pp. 43-49 ◽  
Author(s):  
J. K. Hall ◽  
N. C. Jones
Keyword(s):  
Frequency Spectrum ◽  
Noise Level ◽  
High Harmonic ◽  
Resistive Load ◽  
Noise Amplitude ◽  
Harmonic Frequency ◽  
Thyristor Control ◽  
Very High ◽  
Harmonic Noise ◽  
Low Order

This paper describes the measured harmonics in the load currents of thyristor circuits and shows that with firing angle control the harmonic amplitudes decrease sharply with increasing harmonic frequency, but that they extend to very high harmonic orders of around 6000. The amplitudes of the harmonics are a maximum for a firing delay angle of around 90°.Integral cycle control produces only low order harmonics and sub-harmonics.It is also shown that with firing angle control apparently random inter-harmonic noise is present and that the harmonics fall below this noise level at frequencies of approximately 250 KHz for a switched 50 Hz Waveform and for the resistive load used. The noise amplitude decreases with increasing frequency and is a maximum with 90° firing delay.

scholarly journals Ultra-low thermal conductivity and acoustic dynamics of Si nanostructured metalattices probed using ultrafast high harmonic beams

2019 ◽  
Vol 205 ◽  
pp. 04006
Author(s):  
Begoña Abad ◽  
Travis Frazer ◽  
Joshua Knobloch ◽  
Jorge Hernández-Charpak ◽  
Hiu Cheng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Acoustic Wave ◽  
Thermal Transport ◽  
Extreme Ultraviolet ◽  
High Harmonic ◽  
Wave Dispersion ◽  
Acoustic Wave Propagation ◽  
High Quality ◽  
Very High ◽  
Good Agreement

We extend optical nanometrology capabilities to smaller dimensions by using tabletop coherent extreme ultraviolet (EUV) beams. Specifically, we characterize thermal transport and acoustic wave propagation in 3D periodic silicon inverse metalattices with <15nm characteristic dimensions. Measurements of the thermal transport demonstrate that metalattices may significantly impede heat flow, making them promising candidates for thermoelectric applications. Extraction of the acoustic wave dispersion down to ~100nm shows good agreement with finite element predictions, confirming that these semiconductor metalattices were fabricated with a very high-quality. These results demonstrate that EUV nanometrology is capable of extracting both dispersion relations, and thermal properties of 3D complex nano-systems, with applications including informed design and process control of nanoscale devices.

Quasi-Phase-Matching of High Harmonic EUV Generation at Very High Ionization Levels

2004 ◽  
pp. 217-221
Author(s):  
E. A. Gibson ◽  
A. Paul ◽  
N. L. Wagner ◽  
R. Tobey ◽  
E. Gagnon ◽  
...  
Keyword(s):  
High Harmonic ◽  
Phase Matching ◽  
High Ionization ◽  
Quasi Phase Matching ◽  
Very High

scholarly journals Application of very high harmonic fast waves for off-axis current drive in the DIII-D and FNSF-AT tokamaks

2014 ◽  
Vol 54 (8) ◽  
pp. 083024 ◽  
Author(s):  
R. Prater ◽  
C.P. Moeller ◽  
R.I. Pinsker ◽  
M. Porkolab ◽  
O. Meneghini ◽  
...  
Keyword(s):  
High Harmonic ◽  
Current Drive ◽  
Fast Waves ◽  
Very High

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

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