Glass capillary optics for producing nanometer sized beams and its applications

Ikeda, Tokihiro; Kanai, Yasuyuki; Iwai, Yoshio; Kojima, Takao; Maeshima, Kazuhiro; Meissl, W.; Kobayashi, Tomohiro; Nebiki, Takuya; Miyamoto, So; Pokhil, G. P.; Narusawa, Tadashi; Imamoto, Naoko; Yamazaki, Y.

doi:10.1016/j.surfcoat.2011.03.098

Cited by 33 publications

(21 citation statements)

References 20 publications

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“…The effects of irradiation on the cellular machinery in situ remain unclear. Recently, Ikeda et al [6] developed an instrument that produces accelerated, micrometer-sized ion beams for the irradiation of biological materials in liquids. In a previous study, we irradiated single E. coli cells in liquid culture medium with a micrometer-sized proton beam to evaluate the effect of irradiation on cellular physiology.…”

Section: Introductionmentioning

confidence: 99%

Effect of gamma-ray irradiation on Escherichia coli motility

et al. 2014

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The effects of ionizing radiation on bacteria are generally evaluated from the dose-dependent survival ratio, which is determined by colony-forming ability and mutation rate. The mutagenic damage to cellular DNA induced by radiation has been extensively investigated; however, the effects of irradiation on the cellular machinery in situ remain unclear. In the present work, we irradiated Escherichia coli cells in liquid media with gamma rays from 60Co (in doses up to 8 kGy). The swimming speeds of the cells were measured using a microscope. We found that the swimming speed was unaltered in cells irradiated with a lethal dose of gamma rays. However, the fraction of motile cells decreased in a dose-dependent manner. Similar results were observed when protein synthesis was inhibited by treatment with kanamycin. Evaluation of bacterial swimming speed and the motile fraction after irradiation revealed that some E. coli cells without the potential of cell growth and division remained motile for several hours after irradiation.

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Section: Introductionmentioning

confidence: 99%

Effect of gamma-ray irradiation on Escherichia coli motility

et al. 2014

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“…We also measured T in combining with the optical lens whose focal point was set at the region of large taper angle [4]. Figure 3 shows the dependence of T on the outlet diameter with the optical lens.…”

Section: Resultsmentioning

confidence: 99%

Microbeams of Visible Light by Tapered Glass Capillaries

Katoh

Jin

Minowa³

et al. 2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

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Propagation of visible light through a tapered glass capillary was studied for production of microbeams. Transmittance of laser light through capillaries with different outlet diameters was measured to be about several % and, in combining with the optical lens, larger than 80% was obtained. Density enhancement of the extracted beam was derived and it was found that the tapered glass capillary has the strong focusing ability of light.

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“…Multiple methods exist or are in development for aiming muons [16][17][18][19][20][21]. Standard focusing methods using magnets are not accurate enough on their own, and the muon-magnetic-microscope [20] is being developed with positive muons in mind.…”

Section: Current Technology/researchmentioning

confidence: 99%

“…While it may also yield techniques relevant to the focusing of l À , this is not investigated further, as a method utilizing capillary optics [16][17][18][19]22] should suffice. This method has been tested on an array of beams including various slow highly charged ions (HCIs), MeV ions, positive and negative muons, electrons, positrons and protons [16][17][18][19]22]. When applied to beams, including muon beams in the MeV energy range, the beam is deflected along the inner wall surface and guided via small angle scattering to the outlet where 'a density enhancement factor of $2 0 has been observed [16][17][18][19].…”

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confidence: 99%

“…This method has been tested on an array of beams including various slow highly charged ions (HCIs), MeV ions, positive and negative muons, electrons, positrons and protons [16][17][18][19]22]. When applied to beams, including muon beams in the MeV energy range, the beam is deflected along the inner wall surface and guided via small angle scattering to the outlet where 'a density enhancement factor of $2 0 has been observed [16][17][18][19]. However, with tests of keV beams, once entering the capillary, the beam hits the inner wall, causing it to become charged.…”

mentioning

confidence: 99%

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