Conditions in which off-plane diffraction can efficiently provide high spectral resolving power in EUV/soft x-ray monochromators

2020 ◽  
Author(s):  
Werner H. Jark
Keyword(s):  
Resolving Power ◽  
X Ray ◽  
Plane Diffraction

scholarly journals ESA’s X-Ray Astronomy Mission, XMM

1990 ◽  
Vol 123 ◽  
pp. 129-140
Author(s):  
B.G. Taylor ◽  
A. Peacock
Keyword(s):  
Resolving Power ◽  
Science Program ◽  
Eccentric Orbit ◽  
Ccd Cameras ◽  
Optical Telescope ◽  
X Ray ◽  
Medium Resolution ◽  
Reflection Gratings ◽  
Better Than

AbstractESA’s X-ray Astronomy Mission, XMM, scheduled for launch in 1998, is the second of four cornerstones of ESA’s long term science program Horizon 2000. Covering the range from about 0.1 to 10 keV, it will provide a high throughput of 5000 cm2 at 7 keV with three independant telescopes, and have a spatial resolution better than 30 arcsec. Broadband spectrophotometry is provided by CCD cameras while reflection gratings provide medium resolution spectroscopy (resolving power of about 400) in the range 0.3–3 keV. Long uninterrupted observations will be made from the 24 hr period, highly eccentric orbit, reaching a sensitivity approaching 10−15 erg cm−2 s−1 in one orbit. A 30 cm UV/optical telescope is bore-sighted with the x-ray telescopes to provide simultaneous optical counterparts to the numerous serendipitous X-ray sources which will be detected during every observation.

scholarly journals X-ray spectrometer having 12 000 resolving power at 8 keV energy

2017 ◽  
Vol 88 (10) ◽  
pp. 103107 ◽  
Author(s):  
John F. Seely ◽  
Lawrence T. Hudson ◽  
Albert Henins ◽  
Uri Feldman
Keyword(s):  
Resolving Power ◽  
X Ray

scholarly journals Disentangling AGN and starburst activities in NGC 6240 from an X-ray perspective

2014 ◽  
Vol 10 (S312) ◽  
pp. 36-38
Author(s):  
Junfeng Wang
Keyword(s):  
Active Galactic Nuclei ◽  
Large Scale ◽  
Imaging Spectroscopy ◽  
Galactic Nuclei ◽  
Resolving Power ◽  
High Excitation ◽  
X Ray ◽  
Supermassive Black Hole ◽  
X Ray Imaging ◽  
High Temperature Gas

AbstractThe circum-nuclear region in an active galaxy is often complex with presence of high excitation gas, collimated radio outflow, and star formation activities, besides the actively accreting supermassive black hole. The unique spatial resolving power of Chandra X-ray imaging spectroscopy enables more investigations to disentangle the active galactic nuclei and starburst activities. For galaxies in the throes of a violent merging event such as NGC6240, we were able to resolve the high temperature gas surrounding its binary active black holes and discovered a large scale soft X-ray halo.

scholarly journals Demonstration of resolving power λ/Δλ > 10,000 for a space-based x-ray transmission grating spectrometer

2019 ◽  
Vol 58 (5) ◽  
pp. 1223 ◽  
Author(s):  
Ralf K. Heilmann ◽  
Jeffery Kolodziejczak ◽  
Alexander R. Bruccoleri ◽  
Jessica A. Gaskin ◽  
Mark L. Schattenburg
Keyword(s):  
Resolving Power ◽  
X Ray ◽  
Transmission Grating ◽  
Grating Spectrometer

scholarly journals Innovative Techniques for X-ray Calorimetry

1990 ◽  
Vol 115 ◽  
pp. 357-360
Author(s):  
S. Labov ◽  
E. Silver ◽  
D. Landis ◽  
N. Madden ◽  
F. Goulding ◽  
...  
Keyword(s):  
Detection System ◽  
Light Emitting Diode ◽  
Thermal Response ◽  
Diagnostic Procedures ◽  
Resolving Power ◽  
Infrared Light ◽  
Temperature Control System ◽  
Thermal Detector ◽  
X Ray ◽  
Noise Characteristics

AbstractIn our x-ray calorimetry effort, we have developed several techniques which may be helpful to other groups working in this field. We are studying several different monolithic and composite calorimeter designs. In our readout configuration, the preamplifier circuit employs negative voltage feedback which allows us to accurately measure the temporal profile of the thermal pulse produced by an x-ray absorbed in a micro-calorimeter. Rise times of less than two microseconds have been observed in monolithic devices operating at .3 K. Furthermore, the feedback preamplifier can be configured for either positive or negative electro-thermal feedback. This preamplifier system is followed by an analog pulse shaping amplifier with a frequency response that can be adjusted to yield the maximum signal to noise ratio for a given thermal response of the calorimeter. In addition, we have developed several diagnostic procedures which have been useful in determining the operating and noise characteristics of our devices. These include an infrared light-emitting diode which flashes a discrete amount of energy on to the calorimeter, and a capacitively coupled test input to the preamplifier which allows us to directly determine the total noise in the thermal detection system. Finally, we are developing an adiabatic demagnetization refrigerator with a temperature control system that is designed to stabilize the 0.1 K cold stage to better than 8 μK. This is required for a resistive thermal detector with resolving power of 1000.

A high-resolving-power x-ray spectrometer for the OMEGA EP Laser (invited)

2016 ◽  
Vol 87 (11) ◽  
pp. 11D504 ◽  
Author(s):  
P. M. Nilson ◽  
F. Ehrne ◽  
C. Mileham ◽  
D. Mastrosimone ◽  
R. K. Jungquist ◽  
...  
Keyword(s):  
Resolving Power ◽  
X Ray

Recent Applications with the X-Ray Microscope

1957 ◽  
Vol 1 ◽  
pp. 483-494
Author(s):  
Selby E. Summers
Keyword(s):  
Resolving Power ◽  
Depth Of Field ◽  
Specimen Preparation ◽  
X Rays ◽  
Optical Instrument ◽  
X Ray ◽  
Technical Details ◽  
The Many ◽  
Preparation Techniques ◽  
Shadow Projection

AbstractThe X-ray microscope is an electrostatic optical instrument employing X-rays for shadow projection to magnify and reveal detailed internal structure of specimens opaque to light or electrons. Its many advantages — high resolving power, greater penetration, large depth of field, and stereographic presentation — make the X-ray Microscope a versatile instrument for industrial research and development. Because the instrument was recently introduced, little information is available on specimen preparation techniques, or types of specimens suitable for study. A few of the many possible applications will be discussed, as well as a brief review of the technical details of the instrument.

Comparison between classical and off-plane diffraction efficiency for the soft x-ray region

2019 ◽  
Author(s):  
Nicola Fabris ◽  
Fabio Frassetto ◽  
Paolo Miotti ◽  
Fabio Samparisi ◽  
Carlo Spezzani ◽  
...  
Keyword(s):  
Diffraction Efficiency ◽  
X Ray ◽  
Plane Diffraction
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