High-resolution tangential absolute extreme ultraviolet arrays for radiated power density measurements on NSTX-U

2014 ◽  
Vol 85 (11) ◽  
pp. 11D859
Author(s):  
L. Delgado-Aparicio ◽  
R. E. Bell ◽  
I. Faust ◽  
K. Tritz ◽  
A. Diallo ◽  
...  
Keyword(s):  
High Resolution ◽  
Power Density ◽  
Extreme Ultraviolet ◽  
Density Measurements ◽  
Radiated Power

Pressure, temperature, and density measurements using high-resolution N2 CARS

1998 ◽  
Author(s):  
M. Woodmansee ◽  
J. Kuehner ◽  
R. Lucht ◽  
J. Dutton
Keyword(s):  
High Resolution ◽  
Density Measurements

High resolution tunnel junction extreme ultraviolet detectors limited by quasiparticle counting statistics

1999 ◽  
Vol 9 (2) ◽  
pp. 3330-3333 ◽  
Author(s):  
S. Friedrich ◽  
J.B. Le Grand ◽  
L.J. Hiller ◽  
J. Kipp ◽  
M. Frank ◽  
...  
Keyword(s):  
High Resolution ◽  
Tunnel Junction ◽  
Extreme Ultraviolet ◽  
Ultraviolet Detectors ◽  
Counting Statistics

scholarly journals Energetics of Hi-C EUV brightenings

2018 ◽  
Vol 615 ◽  
pp. A47 ◽  
Author(s):  
Srividya Subramanian ◽  
Vinay L. Kashyap ◽  
Durgesh Tripathi ◽  
Maria S. Madjarska ◽  
John G. Doyle
Keyword(s):  
High Resolution ◽  
Energy Loss ◽  
Extreme Ultraviolet ◽  
Thermal Structure ◽  
Emission Measure ◽  
Light Curves ◽  
Solar Dynamics Observatory ◽  
Differential Emission Measure ◽  
Dominant Mechanism ◽  
Solar Dynamics

We study the thermal structure and energetics of the point-like extreme ultraviolet (EUV) brightenings within a system of fan loops observed in the active region AR 11520. These brightenings were simultaneously observed on 2012 July 11 by the High-resolution Coronal (Hi-C) imager and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). We identified 27 brightenings by automatically determining intensity enhancements in both Hi-C and AIA 193 Å light curves. The energetics of these brightenings were studied using the Differential Emission Measure (DEM) diagnostics. The DEM weighted temperatures of these transients are in the range log T(K) = 6.2−6.6 with radiative energies ≈1024−25 ergs and densities approximately equal to a few times 109 cm−3. To the best of our knowledge, these are the smallest brightenings in EUV ever detected. We used these results to determine the mechanism of energy loss in these brightenings. Our analysis reveals that the dominant mechanism of energy loss for all the identified brightenings is conduction rather than radiation.

scholarly journals Assessment of Wind Energy for Nevada Using Towers and Mesoscale Modeling

2007 ◽  
Author(s):  
Darko Koracin ◽  
Richard L. Reinhardt ◽  
Marshall B. Liddle ◽  
Travis McCord ◽  
Domagoj Podnar ◽  
...  
Keyword(s):  
High Resolution ◽  
Wind Energy ◽  
Wind Power ◽  
Power Density ◽  
Mesoscale Model ◽  
Horizontal Resolution ◽  
Mesoscale Modeling ◽  
Annual Cycles ◽  
Wind Power Density ◽  
Mountainous Regions

The main objectives of the study were to support wind energy assessment for all of Nevada by providing two annual cycles of high-resolution mesoscale modeling evaluated by data from surface stations and towers, estimating differences between these annual cycles and standard wind maps, and providing wind and wind power density statistics at elevations relevant to turbine operations. In addition to the 65 existing Remote Automated Weather Stations in Nevada, four 50-m-tall meteorological towers were deployed in western Nevada to capture long-term wind characteristics and provide database input to verify and improve modeling results. The modeling methodology using Mesoscale Model 5 (MM5) was developed to provide wind and wind power density estimates representing mesoscale effects that include actual synoptic forcing during the two annual cycles (horizontal resolution on the order of 2 and 3 km). The results from the two annual simulation cycles show similar wind statistics with an average difference of less than 100 W/m2. The available TrueWind results for the wind power density at 50 m show greater values of wind power density compared to both MM5-simulated annual cycles for most of the area. However, mainly in the Sierras and the mountainous regions of southern and eastern Nevada, the MM5 simulations indicate greater values for wind power density. The results of this study suggest that the synthesis of the data from a network of tower observations and high-resolution mesoscale modeling is a crucial tool for assessing the wind power density in Nevada and, more generally, other topographically developed areas.

scholarly journals Generation of high-resolution kagome lattice structures using extreme ultraviolet interference lithography

2012 ◽  
Vol 101 (9) ◽  
pp. 093104 ◽  
Author(s):  
Li Wang ◽  
Bernd Terhalle ◽  
Vitaliy A. Guzenko ◽  
Alan Farhan ◽  
Mohamad Hojeij ◽  
...  
Keyword(s):  
High Resolution ◽  
Extreme Ultraviolet ◽  
Interference Lithography ◽  
Lattice Structures ◽  
Kagome Lattice ◽  
Kagomé Lattice

High-Resolution Observations of the Extreme Ultraviolet Sun

1997 ◽  
pp. 123-141
Author(s):  
R. A. Harrison ◽  
A. Fludra ◽  
C. D. Pike ◽  
J. Payne ◽  
W. T. Thompson ◽  
...  
Keyword(s):  
High Resolution ◽  
Extreme Ultraviolet

scholarly journals Extreme Ultraviolet Spectroscopy of Magnetic Cataclysmic Variables

1996 ◽  
Vol 152 ◽  
pp. 309-316
Author(s):  
Frits Paerels ◽  
Min Young Hur ◽  
Christopher W. Mauche
Keyword(s):  
High Resolution ◽  
White Dwarf ◽  
Extreme Ultraviolet ◽  
Cataclysmic Variables ◽  
Ultraviolet Spectroscopy ◽  
Temperature Structure ◽  
Polar Cap ◽  
Ultraviolet Emission ◽  
X Ray ◽  
Magnetic Cataclysmic Variables

A longstanding problem in the interpretation of the X-ray and extreme ultraviolet emission from strongly magnetic cataclysmic variables can be addressed definitively with high resolution EUV spectroscopy. A detailed photospheric spectrum of the accretion-heated polar cap of the white dwarf is sensitive in principle to the temperature structure of the atmosphere. This may allow us to determine where and how the bulk of the accretion energy is thermalized. The EUVE data on AM Herculis and EF Eridani are presented and discussed in this context.

scholarly journals The Solar Orbiter SPICE instrument

2020 ◽  
Vol 642 ◽  
pp. A14 ◽  
Author(s):  
◽  
M. Anderson ◽  
T. Appourchaux ◽  
F. Auchère ◽  
R. Aznar Cuadrado ◽  
...  
Keyword(s):  
High Resolution ◽  
Data Processing ◽  
Extreme Ultraviolet ◽  
High Resolution Imaging ◽  
Concept Design ◽  
Performance Measurements ◽  
Imaging Spectrometer ◽  
Scientific Success ◽  
Resolution Imaging ◽  
Orbiter Mission

Aims. The Spectral Imaging of the Coronal Environment (SPICE) instrument is a high-resolution imaging spectrometer operating at extreme ultraviolet wavelengths. In this paper, we present the concept, design, and pre-launch performance of this facility instrument on the ESA/NASA Solar Orbiter mission. Methods. The goal of this paper is to give prospective users a better understanding of the possible types of observations, the data acquisition, and the sources that contribute to the instrument’s signal. Results. The paper discusses the science objectives, with a focus on the SPICE-specific aspects, before presenting the instrument’s design, including optical, mechanical, thermal, and electronics aspects. This is followed by a characterisation and calibration of the instrument’s performance. The paper concludes with descriptions of the operations concept and data processing. Conclusions. The performance measurements of the various instrument parameters meet the requirements derived from the mission’s science objectives. The SPICE instrument is ready to perform measurements that will provide vital contributions to the scientific success of the Solar Orbiter mission.

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