Oyo Buturi
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Print ISSN : 0369-8009
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Volume 33, Issue 6
Displaying 1-11 of 11 articles from this issue
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  • [title in Japanese]
    Ryuzo UEDA
    1964 Volume 33 Issue 6 Pages 375-376
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.375
    JOURNAL FREE ACCESS
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  • Properties of Scintillation Detector
    Tomota NISHI, Masahiro OURA
    1964 Volume 33 Issue 6 Pages 377-389
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.377
    JOURNAL FREE ACCESS
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  • Glass for Optical Maser (2)
    Emission Spectra of Nd3+ Glass Laser
    Yoshikazu TOHYAMA, Eizo KANAI, Susumu NAMBA, Pil Hyon KIM, Masahide KA ...
    1964 Volume 33 Issue 6 Pages 390-394
    Published: June 10, 1964
    Released on J-STAGE: February 20, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.390
    JOURNAL FREE ACCESS
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    Emission spectra of Nd3+ in glass laser rods are investigated. The band spectrum, centered at about 1.06μ and broadened about 60Å, consists of several tens of lines. The lines are spaced 1Å_??_5Å, about 3Å being most probable.
    On the consideration of cavity modes and broadening of fluorescence lines, the experimental results are outlined.
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  • Accuracy of Transfer Function Calculated by Herzberger's Interpolation Method
    Tsuneko SUZUKI, Teruji OSE
    1964 Volume 33 Issue 6 Pages 395-400
    Published: June 10, 1964
    Released on J-STAGE: February 20, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.395
    JOURNAL FREE ACCESS
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    By the development of electronic computer, the use of spot diagram for evaluation of optical image has become practical, but the computation involves the time-consuming and troublesome skew ray tracing, for which simplification, Herzberger's interpolation method is applied and the transfer function is obtained by using a lens of F/2.5, f=75 mm as
    R(s, t)=1/N_??_ exp[-2πi(sΔxi+tΔyi)]
    With this transfer function, the interpolation method is compared with the exact skew ray tracing method in regard to the accuracy. The relation found between the number of sampling points that were used to determine the coefficients of the interpolation formula and the accuracy of the coefficients or the transfer function shows that the skew ray tracing of 7 sampling points for 0° incident angle and 12 sampling points for 15° incident angle are sufficient for the accuracy. Good results are obtained on lenses of F/4 and lower apertures but not on lenses of higher apertures such as F/2.5.
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  • Relay Circuit for Automatic Operation of High Current Air Gap
    Hisamitsu YOSHIMURA, Haruyuki OHNISHI
    1964 Volume 33 Issue 6 Pages 400-406
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.400
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    For repetition of discharge of a condenser bank in a high current circuit, the operation of air gap for the control of high current is automatized in consideration of instability of air gap that causes the discharge voltage to fluctuate.
    If the air gap starts its action when the voltage is low, the automatic mechanism stops the charging of condenser at once and sets the charging relay back to its initial condition. If, despite high voltage, the air gap fails to act, triggering pulses are applied at given intervals until the action starts. If the surface flush-over originates on condenser leads or other components of high current circuits, the charging is stopped by a relay. All the relay circuits are so devised that the operation can be either automatic or manual. The action of every component of the circuit is discussed.
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  • Microwave-Induced Pyroelectric Characteristics of BaTiO3 Single Crystal
    Hideo IWASAKI
    1964 Volume 33 Issue 6 Pages 407-412
    Published: June 10, 1964
    Released on J-STAGE: February 20, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.407
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    Pyroelectric current induced by irradiation of modulated microwave of 9300 Mc/s frequency is observed on a single crystal of BaTiO3 mounted in a wave guide. The resultant pyro-electric current density is given by
    _??_
    The numerical value of the rate dPs/dT of the crystal is about 1×10-8 coulomb/cm2/°C at room temperature, and when heated uniformly in a microwave electric field, the rate of temperature rise is given by
    _??_
    where B is a constant relating to the heat flow from the crystal, α a constant, mainly determina-ble by physical properties of the crystal, and W(t) the incident microwave power as a function of time.
    As for the characteristics of pyro-current, slowly varying current that is induced by sinusoidally modulated power of very low frequency is measured with an electrometer provided with a pen recor-der, and quickly varying current that is found at the time when incident power is modulated or switched on is observed with a synchroscope combined with a pre-amplifier. The characteristics observed at low power levels conform to those expected of the temperature changes in the crystal estimated with a few functional forms of W(t). However, when the incident microwave power reaches a certain value in the range of several hundred milliwatts, the pyro-electric effect disappears suddenly with simultaneous generation of noise, the cause of which is the disordered domain structure in the crystal.
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  • A Low Background Beta-Spectrometer with a Double-Layer Scintillator
    Eiichi TANAKA, Toshiyuki HIRAMOT, Norimasa NOHARA
    1964 Volume 33 Issue 6 Pages 413-419
    Published: June 10, 1964
    Released on J-STAGE: April 02, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.413
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    A β-ray spectrometer suitable for low level samples has been constructed. In order to reduce the background counting rate, sum signals of output pulses from an “analyzing” and a “window” scintillator are analyzed in coincidence with signals from the window scintillator. These two scintillators are mounted on one photomultiplier tube, and the window signals are selected by means of pulse shape discrimination with double delay line clipping.
    A CsI (Tl) crystal (2"φ×3.5 mm) is used as the analyzing scintillator and a plastic scintillator (1"φ×0.5, ×1.25 or×1.9 mm) as the window. When a window scintillator of 1.9 mm in thickness was used, the background was by a factor of about 70 in a lead shield of 10 cm in thickness, and its counting rate was about 1.0 cpm for the energy range from 0.15 to 1.7 MeV.
    The limit of the pulse shape discrimination is discussed concerning the relations among signal fluctuation, discrimination energy and thickness of the window scintillator.
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  • [title in Japanese]
    T. T.
    1964 Volume 33 Issue 6 Pages 419
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.419
    JOURNAL FREE ACCESS
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  • Hydrogen Detector Tube
    Takeshi ADACHI
    1964 Volume 33 Issue 6 Pages 420-421
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.420
    JOURNAL FREE ACCESS
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  • High-Speed Double-Exposure Shadowgraphy by means of a Single Kerr Cell Shutter
    Haruo NAKATSUKA, Yositaka ONODERA
    1964 Volume 33 Issue 6 Pages 421-423
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.421
    JOURNAL FREE ACCESS
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  • Light Modulator of Cubic Crystals
    Tatuhiko YAMANAKA, Chiyoe YAMANAKA
    1964 Volume 33 Issue 6 Pages 423-426
    Published: June 10, 1964
    Released on J-STAGE: February 09, 2009
    DOIhttps://doi.org/10.11470/oubutsu1932.33.423
    JOURNAL FREE ACCESS
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