Development of press-formed substrates for large x-ray telescopes

Awaki, Hisamitsu; Heike, Kazunori; Nakashima, Toshikazu; Murakami, Hirokatsu; Honda, Hiromichi; Shioya, Susumu

doi:10.1117/12.550325

Cited by 2 publications

(4 citation statements)

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“…We found that the press-forming method was useful for production of thin substrates in the R & D phase 9 . Since the foil length of the R & D model is only 100 mm a stage, this model is not suitable for a large X-ray telescope.…”

Section: Design Of the Long Substratementioning

confidence: 99%

“…In our R&D model with a length of 100 mm/stage, the figure error of < 10 µm enables us to make a smooth surface using a replication method 8 . This R&D model demonstrates the feasibility of the press-forming method 9 . Since long substrates are suitable for a large telescope, we are developing a long substrate made of magnesium alloy with 200 mm/stage.…”

Section: Introductionmentioning

confidence: 95%

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Development of lightweight substrates made of magnesium

Awaki

Heike

Honda³

et al. 2005

SPIE Proceedings

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We are studying on a press forming of a 0.3-mm-thick foil in order to make advanced thin-foil substrates with a twostage reflector for large X-ray telescopes. Aluminum alloy has been used as a material for thin-foil substrates. We propose a use of Mg foil as lightweight substrates, since more lightweight material is necessary for building the large telescopes. Furthermore, we are making a two-stage reflector with a stage 200 mm long, since a long substrate has an advantage for fabrication of large X-ray telescopes. After various experiments, we formed a Mg foil with a figure error of +/-20 µm. This large figure error can be removed by a replication method. We also made an evaluation system of an image quality by using a Newtonian telescope. The evaluation system can generate a collimated optical light with a diameter of 450 mm and with a parallelism of about 4". Using this system, we found that an image quality of our Mg foil was similar to that of the ASCA foils.

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Section: Design Of the Long Substratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Development of lightweight substrates made of magnesium

Awaki

Heike

Honda³

et al. 2005

SPIE Proceedings

Self Cite

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show abstract

“…In order to evaluate an image quality of the replicated foil, we used the collimated optical light system at Ehime University 8 .…”

Section: Evaluation Of the Image Qualitymentioning

confidence: 99%

“…Furthermore, this method would release us from the alignment between confocal paraboloidal and hyperboloidal reflectors. We have realized this mirror substrate in applying a hydraulic press to the sheet of aluminum foil with a thickness of 0.3 mm and a length of 100 mm/reflector 5,6,7,8 . Furthermore, we have developed a long substrate made of magnesium alloy with 200 mm/reflector for a large XRT, and achieve a figure error of less than 60 µm, in which we can apply a replication method on this foil to obtain the smooth surface 9 .…”

Section: Introductionmentioning

confidence: 99%

Replication of Wolter I shaped surface on a two-stage thin-foil substrate

et al. 2006

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We have developed advanced thin-foil substrates with a two-stage reflector for a large X-ray telescope. We successfully formed a magnesium foil with a figure error of a peak-to-peak value of 60 µm. This figure error has allowed a replication method in order to obtain smooth surface. We made a glass mandrel precisely shaped Wolter type-I optics by using the ELID method, then applied the replication to a 200 mm length aluminum foil at Nagoya University. After the replication, the figure error of the foil was improved by as much as factor 10. We evaluated the image quality of the replicated foil by using a collimated optical light at Ehime University, and we demonstrated the potential of the replication method. We report a current status of the development of the replication method.

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Development of press-formed substrates for large x-ray telescopes

Cited by 2 publications

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Development of lightweight substrates made of magnesium

Development of lightweight substrates made of magnesium

Replication of Wolter I shaped surface on a two-stage thin-foil substrate

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