Hot slumping glass technology for the grazing incidence optics of future missions with particular reference to IXO

Ghigo, M.; Basso, S.; Bavdaz, Marcos; Conconi, P.; Citterio, O.; Civitani, M.; Friedrich, Péter; Gallieni, D.; Guldimann, Benedikt; Martelli, Francesco; Negri, Ronald E.; Pagano, G.; Pareschi, G.; Parodi, Giancarlo; Proserpio, L.; Salmaso, B.; Scaglione, F.; Spiga, D.; Tagliaferri, G.; Terzi, L.; Tintori, Matteo; Vongehr, Monika; Wille, E.; Winter, Anita; Zambra, A.

doi:10.1117/12.857577

Cited by 8 publications

(7 citation statements)

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“…During the cooling down phase, the temperature is stabilized at the glass annealing point to allow the relaxation of stresses inside the glass and eventually the oven is cooled down at room temperature. Depending on the specific process procedure, two groups of Hot slumping methods exist: the direct slumping, in which the optical side of the mirror being produced is in contact with the mould surface, and the opposite indirect approach [14]. Two main possibilities exist for Hot Slumping: the press-bending or the sag-bending, differing in the application of an additional force rather than solely gravity to shape the glass at high temperature.…”

Section: Inaf-oab Hot Slumping Technology With Pressure Assistancementioning

confidence: 99%

Slumping technique for the manufacturing of a representative x-ray grazing incidence mirror module for future space missions

et al. 2013

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The Astronomical Observatory of Brera (INAF-OAB, Italy), with the financing support of the European Space Agency (ESA), has concluded a study regarding a glass shaping technology for the production of grazing incidence segmented x-ray optics. This technique uses a hot slumping phase, in which pressure is actively applied on thin glass foils being shaped, to form a cylindrical approximation of Wolter I x-ray segments, and a subsequent cold slumping phase, in which the final Wolter I profile is then freeze into the glass segments during their integration in elemental X-ray Optical Units. The final goal of this study was the manufacturing of a prototype containing a number of slumped pair plates (meaning parabola and hyperbola couples) having representative dimensions to be tested both in UV light and in x-rays at the Panter facility (Germany). In this paper, the INAF-OAB slumping technique, comprising a shaping step and an integration step is described, together with the results obtained on the manufactured prototype modules: the first prototype was aimed to test the ad-hoc designed and built semi-automatic Integration MAchine (IMA) and debug its control software. The most complete module comprises 40 slumped segments of Schott D263 glass type of dimension 200 mm x 200 mm and thickness of 0.4 mm, slumped on Zerodur K20 mould and stacked together through glued BK7 glass structural ribs to form the first entire x-ray optical module ever built totally composed by glass. A last prototype was aimed at demonstrate the use of Schott glass AF32 type instead of D263. In particular, a new hot slumping experimental set-up is described whose advantage is to permit a better contact between mould and glass during the shaping process. The integration procedure of the slumped segments into the elemental module is also reviewed.

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Section: Inaf-oab Hot Slumping Technology With Pressure Assistancementioning

confidence: 99%

Slumping technique for the manufacturing of a representative x-ray grazing incidence mirror module for future space missions

et al. 2013

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“…In particular, in USA NASA/Goddard Space Flight centre and Centre for Astrophysics (CfA) are involved in slumping activities for IXO [3], [4]. In Europe, INAF-OAB is developing the direct slumping with pressure, while MPE is investigating the indirect slumping approach [5], [6]. Typical dimensions of the slumped plates being actually considered are 200 mm x 200 mm with a thickness of 0.4 mm.…”

Section: Production Of Thin Glass Substratesmentioning

confidence: 99%

Thermal shaping of thin glass substrates for segmented grazing incidence active optics

et al. 2010

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In the context of the AHEAD project of the FP7 European call, a group of UK and Italian Institutions is proposing a research on X-ray optics that can provide large collecting areas (a few decades of m 2 ) combined with a high angular resolution (0.1-1 arcsec). This requires the development of Active X-ray Optics in which the reflecting surfaces can be adjusted-manipulated in order to achieve and maintain the correct shape. In the context of an international collaboration with UK institutes, the Astronomical Observatory of Brera (INAF-OAB) is in charge of the production of thin (0.4 mm or less) glass mirror segments for the demonstration of a 2-reflection active X-ray system including piezoelectric actuators to improve the angular resolution, For the shell segments production the hot slumping approach of glass foils, already under investigation for the realization of IXO mirrors, is adopted. In this paper, a detailed description of the method is presented, reporting also on the metrological data of produced samples.

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“…IXO team members are developing two fundamentally different segmented-mirror technologies-slumped-glass optics (Figure 9) and silicon-pore optics ( Figure 10). For slumped-glass optics, Goddard Space Flight Center (GSFC) leads the NASA-sponsored technology development 64 ; INAF-Brera and Max-Plank-Institut fur extraterrestrische Physik (MPE) perform the ESA-funded technology development 65 . For silicon-pore optics, the European Space Research and Technology Centre (ESTEC) leads an industrial consortium in the ESA-sponsored technology development 66,67 .…”

Section: Future Missionsmentioning

confidence: 99%

High-resolution x-ray telescopes

O’Dell¹,

Brissenden

Davis

et al. 2010

SPIE Proceedings

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High-energy astrophysics is a relatively young scientific field, made possible by space-borne telescopes. During the half-century history of x-ray astronomy, the sensitivity of focusing x-ray telescopes-through finer angular resolution and increased effective area-has improved by a factor of a 100 million. This technological advance has enabled numerous exciting discoveries and increasingly detailed study of the high-energy universe-including accreting (stellar-mass and super-massive) black holes, accreting and isolated neutron stars, pulsar-wind nebulae, shocked plasma in supernova remnants, and hot thermal plasma in clusters of galaxies. As the largest structures in the universe, galaxy clusters constitute a unique laboratory for measuring the gravitational effects of dark matter and of dark energy. Here, we review the history of high-resolution x-ray telescopes and highlight some of the scientific results enabled by these telescopes. Next, we describe the planned next-generation x-ray-astronomy facility-the International X-ray Observatory (IXO). We conclude with an overview of a concept for the next next-generation facility-Generation X. The scientific objectives of such a mission will require very large areas (about 10000 m2) of highly-nested lightweight grazing-incidence mirrors with exceptional (about 0.1-arcsecond) angular resolution. Achieving this angular resolution with lightweight mirrors will likely require on-orbit adjustment of alignment and figure.Comment: 19 pages, 11 figures, SPIE Conference 7803 "Adaptive X-ray Optics", part of SPIE Optics+Photonics 2010, San Diego CA, 2010 August 2-

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Hot slumping glass technology for the grazing incidence optics of future missions with particular reference to IXO

Cited by 8 publications

References 0 publications

Slumping technique for the manufacturing of a representative x-ray grazing incidence mirror module for future space missions

Slumping technique for the manufacturing of a representative x-ray grazing incidence mirror module for future space missions

Thermal shaping of thin glass substrates for segmented grazing incidence active optics

High-resolution x-ray telescopes

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