Development of thin-foil substrates for a large X-ray telescope

Awaki, Hisamitsu; Heike, Kazunori; Misao, Y.; Tawara, Yuzuru; Ogasaka, Yasushi; Kunieda, H.; Ohmori, Hitoshi; Lin, Weimin; Moriyasu, Sei; Ueno, Yoshio; Morita, Shin; Katahira, Kazutoshi; Liu, C.; Honda, Hiroaki; Shioya, Susumu

doi:10.1016/j.asr.2003.03.058

Cited by 3 publications

(3 citation statements)

References 10 publications

(8 reference statements)

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“…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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Section: Introductionmentioning

confidence: 99%

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

et al. 2006

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“…To form a thin-foil substrate having a shape of two reflectors, strong pressure is necessary for bending a rolling foil. Applying a hydraulic press, we obtain enough pressure to form the substrate 5,6,7 . This method has an advantage in mass production of mirror substrates.…”

Section: Introductionmentioning

confidence: 99%

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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“…In the present setup, X-ray photons are emitted to 4 space angle uniformly. If we apply X-ray mirrors or other reflectors similarly as in the X-ray astrophysics, 9) the number of X-rays which can reach the sample will increase. In addition to these improvements, we are now planning to use the -ray excitation in the same system, because scintillation phenomena under charged particle excitation are also actively studied.…”

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confidence: 99%

Development and Performance Test of Picosecond Pulse X-ray Excited Streak Camera System for Scintillator Characterization

Yanagida

Fujimoto

Yoshikawa

et al. 2010

Appl. Phys. Express

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To observe time and wavelength-resolved scintillation events, picosecond pulse X-ray excited streak camera system is developed. The wavelength range spreads from vacuum ultraviolet (VUV) to near infrared region (110–900 nm) and the instrumental response function is around 80 ps. This work describes the principle of the newly developed instrument and the first performance test using BaF2 single crystal scintillator. Core valence luminescence of BaF2 peaking around 190 and 220 nm is clearly detected by our system, and the decay time turned out to be of 0.7 ns. These results are consistent with literature and confirm that our system properly works.

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Development of thin-foil substrates for a large X-ray telescope

Cited by 3 publications

References 10 publications

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

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

Development of lightweight substrates made of magnesium

Development and Performance Test of Picosecond Pulse X-ray Excited Streak Camera System for Scintillator Characterization

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