scholarly journals Future Prospects for Solar EUV and Soft X-Ray Spectroscopy Missions

2021 ◽  
Vol 8 ◽  
Author(s):  
Peter R. Young
Keyword(s):  
Extreme Ultraviolet ◽  
Imaging Techniques ◽  
Low Cost ◽  
Solar Physics ◽  
Spectral Features ◽  
The Sun ◽  
Future Prospects ◽  
X Ray

Future prospects for solar spectroscopy missions operating in the extreme ultraviolet (EUV) and soft X-ray (SXR) wavelength ranges, 1.2–1,600 Å, are discussed. NASA is the major funder of Solar Physics missions, and brief summaries of the opportunities for mission development under NASA are given. Upcoming major solar missions from other nations are also described. The methods of observing the Sun in the two wavelength ranges are summarized with a discussion of spectrometer types, imaging techniques and detector options. The major spectral features in the EUV and SXR regions are identified, and then the upcoming instruments and concepts are summarized. The instruments range from large spectrometers on dedicated missions, to tiny, low-cost CubeSats launched through rideshare opportunities.

Upgrade of beamline BL08B at Taiwan Light Source from a photon-BPM to a double-grating SGM beamline

2015 ◽  
Vol 22 (5) ◽  
pp. 1312-1318 ◽  
Author(s):  
Jih-Young Yuh ◽  
Shan-Wei Lin ◽  
Liang-Jen Huang ◽  
Hok-Sum Fung ◽  
Long-Life Lee ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Solar Physics ◽  
Emission Spectra ◽  
Ultraviolet Region ◽  
Extreme Ultraviolet Lithography ◽  
Beam Position ◽  
Ultraviolet Lithography ◽  
X Ray ◽  
Nano Fabrication ◽  
Grating Monochromator

During the last 20 years, beamline BL08B has been upgraded step by step from a photon beam-position monitor (BPM) to a testing beamline and a single-grating beamline that enables experiments to record X-ray photo-emission spectra (XPS) and X-ray absorption spectra (XAS) for research in solar physics, organic semiconductor materials and spinel oxides, with soft X-ray photon energies in the range 300–1000 eV. Demands for photon energy to extend to the extreme ultraviolet region for applications in nano-fabrication and topological thin films are increasing. The basic spherical-grating monochromator beamline was again upgraded by adding a second grating that delivers photons of energy from 80 to 420 eV. Four end-stations were designed for experiments with XPS, XAS, interstellar photoprocess systems (IPS) and extreme-ultraviolet lithography (EUVL) in the scheduled beam time. The data from these experiments show a large count rate in core levels probed and excellent statistics on background normalization in theL-edge adsorption spectrum.

scholarly journals The solar physics FORWARD codes: Now with widgets!

2013 ◽  
Vol 8 (S300) ◽  
pp. 414-415 ◽  
Author(s):  
Blake Forland ◽  
Sarah Gibson ◽  
James Dove ◽  
Therese Kucera
Keyword(s):  
Extreme Ultraviolet ◽  
Solar Physics ◽  
Forward Modeling ◽  
Ease Of Use ◽  
Simulation Data ◽  
X Ray ◽  
Data Cubes ◽  
Front End ◽  
Physics Community ◽  
Analytic Models

AbstractWe have developed a suite of forward-modeling IDL codes (FORWARD) to convert analytic models or simulation data cubes into coronal observables, allowing a direct comparison with observations. Observables such as extreme ultraviolet, soft X-ray, white light, and polarization images from the Coronal Multichannel Polarimeter (CoMP) can be reproduced. The observer's viewpoint is also incorporated in the FORWARD analysis and the codes can output the results in a variety of forms in order to easily create movies, Carrington maps, or simply observable information at a particular point in the plane of the sky. We present a newly developed front end to the FORWARD codes which utilizes IDL widgets to facilitate ease of use by the solar physics community. Our ultimate goal is to provide as useful a tool as possible for a broad range of scientific applications.

scholarly journals Observations of AGN with the Extreme Ultraviolet Explorer

1994 ◽  
Vol 159 ◽  
pp. 105-110
Author(s):  
Herman L. Marshall
Keyword(s):  
Power Law ◽  
Extreme Ultraviolet ◽  
Active Galaxies ◽  
Spectral Features ◽  
Bl Lac Objects ◽  
X Ray ◽  
Difficult Time ◽  
Bl Lac ◽  
First Results ◽  
Galactic Sources

The first results from surveys performed in the extreme ultraviolet (EUV) will be described in the context of studies of active galaxies and BL Lac objects. About a dozen extra-galactic sources are known so far to emit sufficient EUV radiation that they are detectable even through the Galactic interstellar medium. These results are interpreted in the context of a model of EUV or soft X-ray excesses in the case of AGN. In the case of BL Lac objects, the detections indicate that the steep soft X-ray power law spectra continue into the EUV and that there is little intrinsic gas. Finally, there now exists EUV spectra from the Extreme Ultraviolet Explorer for one BL Lac, PKS 2155-304 and two AGN: Mk 478 and NGC 5548. The spectra show no significant spectral features; for AGN, it indicates that optically thin and emission line models may have a difficult time explaining the EUV and soft X-ray bumps.

scholarly journals Ultraviolet Observations of Stellar Coronae: Early Results from HST

1992 ◽  
Vol 9 ◽  
pp. 657-658
Author(s):  
J.L. Linsky
Keyword(s):  
High Resolution ◽  
Spectral Resolution ◽  
Solar Flares ◽  
Extreme Ultraviolet ◽  
The Sun ◽  
X Ray ◽  
Spectroscopic Diagnostics ◽  
Early Results ◽  
Active Stars ◽  
Ultraviolet Observations

Although coronae for stars other than the Sun have previously been detected only in the X-ray and radio portions of the spectrum, the HST and future spacecraft sensitive to ultraviolet (UV) and extreme ultraviolet (ETIV) light will have the spectral resolution to study the dynamics and spectroscopic diagnostics of hot coronal plasmas. In the UV region accessible to HST, forbidden lines of FeXII at 1242 and 1349Å, of FeXXI at 1354Å, and other species seen in solar flares, are predicted to be present in the spectra of active stars. Upcoming observations with the Goddard High Resolution Spectrograph (GHRS) by S. Maran will search for these lines in the dM2e star AU Mic and other stars.

Modelling of small CFRP aerostructure parts for X-ray imaging simulation

2014 ◽  
Vol 5 (3) ◽  
pp. 227-240 ◽  
Author(s):  
Kristina Bliznakova ◽  
Zacharias Kamarianakis ◽  
Aris Dermitzakis ◽  
Zhivko Bliznakov ◽  
Ivan Buliev ◽  
...  
Keyword(s):  
Computational Model ◽  
Imaging Techniques ◽  
Low Cost ◽  
Cone Beam Ct ◽  
Carbon Fibres ◽  
Destructive Testing ◽  
Content Type ◽  
Visual Appearance ◽  
X Ray ◽  
X Ray Imaging

Purpose – The purpose of this paper is to develop a realistic computational model of carbon fibre reinforced polymer (CFRP) structures dedicated for in-silico investigations of the use of X-ray-based imaging techniques as non-destructive testing (NDT) of CFRP parts. Design/methodology/approach – CFRPs contain layers of carbon-fibres bundles within resin. Bundles’ orientation in the different layers is arranged with respect to each other at a well-defined primary direction. In the model, the bundle was simulated as a circular cylinder. The resulted model is a stack of layers of unidirectional bundles having orientation of 0°/90°/45°/−45°. Two CFRP structures were modelled: a flat CFRP part and a real shaped CFRP clip. A porous layer and non-carbon fibres were inserted within each model, respectively. X-ray projection images were generated with a dedicated simulation programme. Three setups were investigated: radiography, tomosynthesis and cone-beam CT (CBCT). Findings – Results showed that porosity and non-carbon fibres were visible with all X-ray-based techniques. Tomosynthesis and CBCT, however, provide higher quality image of defects. Practical implications – The CFRP computational model is a valuable tool in design, testing and optimization phase of X-ray-based imaging techniques for use in NDT of composite materials. Simulated images are generated within a short time; thus results from virtual optimization and testing are obtained very fast and at low cost. Originality/value – An innovative computational model of CFRP structures, dedicated for X-ray imaging simulations, has been developed. The model is characterized by simplicity in its creation and realistic visual appearance of the produced X-ray images.

scholarly journals Achievements of Hinode in the first eleven years

2019 ◽  
Vol 71 (5) ◽  
Author(s):  
◽  
Khalid Al-Janabi ◽  
Patrick Antolin ◽  
Deborah Baker ◽  
Luis R Bellot Rubio ◽  
...  
Keyword(s):  
Solar Physics ◽  
European Space Agency ◽  
Review Article ◽  
Future Prospects ◽  
Optical Telescope ◽  
Imaging Spectrometer ◽  
X Ray ◽  
Space Agency ◽  
The Uk ◽  
Euv Imaging

Abstract Hinode is Japan’s third solar mission following Hinotori (1981–1982) and Yohkoh (1991–2001): it was launched on 2006 September 22 and is in operation currently. Hinode carries three instruments: the Solar Optical Telescope, the X-Ray Telescope, and the EUV Imaging Spectrometer. These instruments were built under international collaboration with the National Aeronautics and Space Administration and the UK Science and Technology Facilities Council, and its operation has been contributed to by the European Space Agency and the Norwegian Space Center. After describing the satellite operations and giving a performance evaluation of the three instruments, reviews are presented on major scientific discoveries by Hinode in the first eleven years (one solar cycle long) of its operation. This review article concludes with future prospects for solar physics research based on the achievements of Hinode.

X-ray and extreme ultraviolet (1?400 �) spectroscopy of the sun, from OSO-III

Solar Physics ◽  
1969 ◽  
Vol 6 (2) ◽  
pp. 183-192 ◽  
Author(s):  
W. M. Neupert ◽  
W. A. White ◽  
W. J. Gates ◽  
M. Swartz ◽  
R. M. Young
Keyword(s):  
Extreme Ultraviolet ◽  
The Sun ◽  
X Ray

Coherent and transient states studied with extreme ultraviolet and X-ray free electron lasers: present and future prospects

2014 ◽  
Vol 63 (5-6) ◽  
pp. 327-404 ◽  
Author(s):  
F. Bencivenga ◽  
F. Capotondi ◽  
E. Principi ◽  
M. Kiskinova ◽  
C. Masciovecchio
Keyword(s):  
Free Electron ◽  
Extreme Ultraviolet ◽  
Free Electron Lasers ◽  
Future Prospects ◽  
X Ray ◽  
Transient States

scholarly journals Conceptual design of BabyIAXO, the intermediate stage towards the International Axion Observatory

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
A. Abeln ◽  
◽  
K. Altenmüller ◽  
S. Arguedas Cuendis ◽  
E. Armengaud ◽  
...  
Keyword(s):  
Dark Matter ◽  
Large Scale ◽  
Intermediate Stage ◽  
Spectral Features ◽  
The Sun ◽  
X Ray ◽  
Solar Axion ◽  
Solar Axions ◽  
Final System ◽  
Experimental Stage

Abstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in the Sun, with unprecedented sensitivity. BabyIAXO is conceived to test all IAXO subsystems (magnet, optics and detectors) at a relevant scale for the final system and thus serve as prototype for IAXO, but at the same time as a fully-fledged helioscope with relevant physics reach itself, and with potential for discovery. The BabyIAXO magnet will feature two 10 m long, 70 cm diameter bores, and will host two detection lines (optics and detector) of dimensions similar to the final ones foreseen for IAXO. BabyIAXO will detect or reject solar axions or ALPs with axion-photon couplings down to gaγ ∼ 1.5 × 10−11 GeV−1, and masses up to ma ∼ 0.25 eV. BabyIAXO will offer additional opportunities for axion research in view of IAXO, like the development of precision x-ray detectors to identify particular spectral features in the solar axion spectrum, and the implementation of radiofrequency-cavity-based axion dark matter setups.

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