Hard x-ray optics: from HEFT to NuSTAR

Koglin, Jason E.; Chen, C. M. Hubert; Chonko, Jim; Christensen, Finn Erland; Craig, William W.; Decker, Todd; Hailey, Charles J.; Harrison, Fiona A.; Jensen, Christian Damsgaard; Madsen, Kristin K.; Pivovaroff, M. J.; Stern, Marcela; Windt, David L.; Ziegler, Eric

doi:10.1117/12.552470

Cited by 20 publications

(6 citation statements)

References 6 publications

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“…Fixing the length of each mirror section at 300 mm and starting with a maximum radius of 399 mm, we then generated complete prescriptions for cone-approximation Wolter I telescopes. We adopted design principles (i. e. spacing between layers, support structures and gaps between individual segments) developed for segmented glass substrate telescopes like HEFT and NuSTAR [124]. Table 3 details the properties of the two designs.…”

Section: Parametermentioning

confidence: 99%

Towards a new generation axion helioscope

Irastorza

Avignone

Caspi

et al. 2011

J. Cosmol. Astropart. Phys.

193

221

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We study the feasibility of a new generation axion helioscope, the most ambitious and promising detector of solar axions to date. We show that large improvements in magnetic field volume, x-ray focusing optics and detector backgrounds are possible beyond those achieved in the CERN Axion Solar Telescope (CAST). For hadronic models, a sensitivity to the axion-photon coupling of g aγ few × 10 −12 GeV −1 is conceivable, 1-1.5 orders of magnitude beyond the CAST sensitivity. If axions also couple to electrons, the Sun produces a larger flux for the same value of the Peccei-Quinn scale, allowing one to probe a broader class of models. Except for the axion dark matter searches, this experiment will be the most sensitive axion search ever, reaching or surpassing the stringent bounds from SN1987A and possibly testing the axion interpretation of anomalous white-dwarf cooling that predicts m a of a few meV. Beyond axions, this new instrument will probe entirely unexplored ranges of parameters for a large variety of axion-like particles (ALPs) and other novel excitations at the low-energy frontier of elementary particle physics. 6 Detectors 25 7 Conclusions 28

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Section: Parametermentioning

confidence: 99%

Towards a new generation axion helioscope

Irastorza

Avignone

Caspi

et al. 2011

J. Cosmol. Astropart. Phys.

193

221

View full text Add to dashboard Cite

show abstract

“…Here the challenge is not so much achieving exquisite focusing or near-unity reflectivity but the availability of cost-effective x-ray optics of the required size. IAXO's optics specifications can be met by a dedicated fabrication effort based on segmented glass substrate optics like the ones of HEFT or NuSTAR [14].…”

Section: Introductionmentioning

confidence: 99%

Future axion searches with the International Axion Observatory (IAXO)

Irastorza

Avignone

Cantatore

et al. 2013

J. Phys.: Conf. Ser.

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DOI: will be assignedThe International Axion Observatory (IAXO) is a new generation axion helioscope aiming at a sensitivity to the axion-photon coupling of gaγ few × 10 −12 GeV −1 , i.e. 1-1.5 orders of magnitude beyond the one currently achieved by CAST. The project relies on improvements in magnetic field volume together with extensive use of x-ray focusing optics and low background detectors, innovations already successfully tested in CAST. Additional physics cases of IAXO could include the detection of electron-coupled axions invoked to explain the white dwarf cooling, relic axions, and a large variety of more generic axionlike particles (ALPs) and other novel excitations at the low-energy frontier of elementary particle physics. This contribution is a summary of our recent paper [1].

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“…Two are shown in Figure 12. The angular resolution of the best mirror was ∼1.3 arcmin at 8 keV [35,36]. There was a clear angular resolution improvement from the inner shells to the middle ones, across the boundary where the spacer density doubled.…”

Section: Glass As a Substratementioning

confidence: 85%

Thin Shell, Segmented X-Ray Mirrors

Petre

2010

X-Ray Optics and Instrumentation

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Thin foil mirrors were introduced as a means of achieving high throughput in an X-ray astronomical imaging system in applications for which high angular resolution was not necessary. Since their introduction, their high filling factor, modest mass, relative ease of construction, and modest cost have led to their use in numerous X-ray observatories, including the Broad Band X-ray Telescope, ASCA, and Suzaku. The introduction of key innovations, including epoxy replicated surfaces, multilayer coatings, and glass mirror substrates, has led to performance improvements and in their becoming widely used for X-ray astronomical imaging at energies above 10 keV. The use of glass substrates has also led to substantial improvement in angular resolution and thus their incorporation into the NASA concept for the International X-ray Observatory with a planned 3 m diameter aperture. This paper traces the development of foil mirrors from their inception in the 1970s through their current and anticipated future applications.

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Hard x-ray optics: from HEFT to NuSTAR

Cited by 20 publications

References 6 publications

Towards a new generation axion helioscope

Towards a new generation axion helioscope

Future axion searches with the International Axion Observatory (IAXO)

Thin Shell, Segmented X-Ray Mirrors

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