A performance budget for the x-ray surveyor telescope

2016 ◽  
Author(s):  
Jonathan Arenberg ◽  
Ryan Allured ◽  
Paul Reid
Keyword(s):  
X Ray ◽  
Performance Budget ◽  
A Performance

Calibration tests and use of a Nicolet/Xentronics imaging proportional chamber mounted on a conventional source for protein crystallography

1989 ◽  
Vol 22 (2) ◽  
pp. 123-137 ◽  
Author(s):  
Z. Derewenda ◽  
J. R. Helliwell
Keyword(s):  
Data Collection ◽  
Single Crystal ◽  
Proportional Counter ◽  
Protein Crystallography ◽  
System Optimization ◽  
High Quality ◽  
X Ray ◽  
Proportional Chamber ◽  
A Performance

The results are presented of calibration tests and several single-crystal X-ray data collection experiments undertaken with a Nicolet/Xentronics Imaging Proportional Counter mounted on a conventional X-ray source. Considerable attention has been given to system optimization in collaboration with Nicolet, and this has led to a performance of high quality.

Choreographic practice research and emotional labour through the x-ray of affective dissonance

2020 ◽  
Vol 11 (1) ◽  
pp. 59-74 ◽  
Author(s):  
Shantel Ehrenberg
Keyword(s):  
Cultural Politics ◽  
Critical Reflection ◽  
Institutional Context ◽  
Early Career ◽  
Practice Research ◽  
X Ray ◽  
Emotional Labour ◽  
Early Career Researcher ◽  
A Performance

In this writing I offer critical illuminations and diffractions with(in) researching, producing and performing a piece of choreographic practice research titled (in)fertile territories: a performance lecture. I utilize the concept of affective dissonance as x-ray to get closer to feelings and emotional labour as an early-career researcher in an institutional context. The writing is grounded in the cultural politics of emotion, and presents choreographic practice research, feminist critical reflection, and writing as technologies mobilized in the hopes of birthing something anew with significantly personal choreographic material.

A Performance Evaluation of X-Ray Crystallography Scientific Workflow Using SciCumulus

2011 ◽  
Author(s):  
Daniel de Oliveira ◽  
Kary Ocana ◽  
Eduardo Ogasawara ◽  
Jonas Dias ◽  
Fernanda Baiao ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Scientific Workflow ◽  
X Ray ◽  
X Ray Crystallography ◽  
A Performance

Structural characterization of a new form of clenbuterol, a well-known decongestant and bronchodilator also used as a performance-enhancing drug

2013 ◽  
Vol 28 (2) ◽  
pp. 63-67 ◽  
Author(s):  
R. Toro ◽  
J. Bruno-Colmenárez ◽  
G. Díaz de Delgado ◽  
J.M. Delgado
Keyword(s):  
Single Crystal ◽  
Respiratory Diseases ◽  
Active Pharmaceutical Ingredient ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Clenbuterol Hydrochloride ◽  
Performance Enhancing ◽  
A Performance

Clenbuterol hydrochloride is an active pharmaceutical ingredient usually prescribed for treatment of respiratory diseases due to its activity as a decongestant and bronchodilator. It has also been used as a performance-enhancing drug. In the PDF-4/Organics 2012 database there are six entries related to this compound: three for its hydrochloride phase calculated using single-crystal data, two for a MeOH and a DMSO solvate of two Cu-clenbuterol complexes, and one experimental unindexed pattern. In this contribution the powder diffraction pattern and the crystal structure, determined using single crystal X-ray diffraction techniques of clenbuterol hemihydrate, C12H18Cl2N2O·0.5H2O, an unreported phase, are presented.

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Some Problems in Understanding the Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 1-9
Author(s):  
A. H. Gabriel
Keyword(s):  
Solar Corona ◽  
Solar Atmosphere ◽  
Theoretical Modelling ◽  
Total System ◽  
Major Advance ◽  
X Ray ◽  
Proper Perspective ◽  
Space Observations

The development of the physics of the solar atmosphere during the last 50 years has been greatly influenced by the increasing capability of observations made from space. Access to images and spectra of the hotter plasma in the UV, XUV and X-ray regions provided a major advance over the few coronal forbidden lines seen in the visible and enabled the cooler chromospheric and photospheric plasma to be seen in its proper perspective, as part of a total system. In this way space observations have stimulated new and important advances, not only in space but also in ground-based observations and theoretical modelling, so that today we find a well-balanced harmony between the three techniques.

White-Light Coronal Structures: Streamers and CMEs

1994 ◽  
Vol 144 ◽  
pp. 82
Author(s):  
E. Hildner
Keyword(s):  
Emission Line ◽  
Electron Density ◽  
White Light ◽  
Coronal Mass Ejections ◽  
X Rays ◽  
Solar Cycles ◽  
Temperature Function ◽  
X Ray ◽  
Eclipse Observations ◽  
Coronal Structures

AbstractOver the last twenty years, orbiting coronagraphs have vastly increased the amount of observational material for the whitelight corona. Spanning almost two solar cycles, and augmented by ground-based K-coronameter, emission-line, and eclipse observations, these data allow us to assess,inter alia: the typical and atypical behavior of the corona; how the corona evolves on time scales from minutes to a decade; and (in some respects) the relation between photospheric, coronal, and interplanetary features. This talk will review recent results on these three topics. A remark or two will attempt to relate the whitelight corona between 1.5 and 6 R⊙to the corona seen at lower altitudes in soft X-rays (e.g., with Yohkoh). The whitelight emission depends only on integrated electron density independent of temperature, whereas the soft X-ray emission depends upon the integral of electron density squared times a temperature function. The properties of coronal mass ejections (CMEs) will be reviewed briefly and their relationships to other solar and interplanetary phenomena will be noted.

Iron K-Line Emission from X-Ray Binaries

1988 ◽  
Vol 102 ◽  
pp. 47-50
Author(s):  
K. Masai ◽  
S. Hayakawa ◽  
F. Nagase
Keyword(s):  
Accretion Disk ◽  
Radiative Recombination ◽  
Characteristic Temperature ◽  
Line Emission ◽  
Ionization Front ◽  
Continuum Radiation ◽  
X Ray ◽  
Low Mass ◽  
X Ray Binaries

AbstractEmission mechanisms of the iron Kα-lines in X-ray binaries are discussed in relation with the characteristic temperature Txof continuum radiation thereof. The 6.7 keV line is ascribed to radiative recombination followed by cascades in a corona of ∼ 100 eV formed above the accretion disk. This mechanism is attained for Tx≲ 10 keV as observed for low mass X-ray binaries. The 6.4 keV line observed for binary X-ray pulsars with Tx> 10 keV is likely due to fluorescence outside the He II ionization front.

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