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  • 1
    Digitale Medien
    Digitale Medien
    Single bunch injection system of the storage ring NIJI-IV for free electron laser use (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 2796-2800 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The system of single bunch injection (SBI) for the storage ring NIJI-IV was completed. The system was used for the injection of the short pulse beams from an electron gun into only one of the 16 rf buckets in the ring. On a compact storage ring, the multipulse beams in one pulse train can be stored into only one of many bunches by one injection. The optimum number of the grid pulse in one pulse train was determined to improve the storage efficiency and the storage current by one injection. The keeping time of the bump orbit was calculated by using the transfer matrices. The optimum pulse number obtained by the calculation is 2. In the SBI system, the number of grid pulses in one pulse train can be selected by the gate circuit. A snap off diode and a clip line are used to generate 2 ns grid pulses. The measured grid pulse was shorter than the longitudinal space 5.5 ns of the rf bucket with voltage of −80 V. The EIMAC Y-646B cathode-grid assembly is used as the electron source. It is expected that the injection system provides a higher peak current and easier free electron laser use operation in comparison with the rf-knockout system. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1145557
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  • 2
    Digitale Medien
    Digitale Medien
    Study of plasma uniformity on JT-60U negative ion source : The 8th international conference on ion sources (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 755-757 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The negative ion source developed at JAERI for the N-NBI was intended to accelerate a 500 keV, 22 A D− beam for 10 s. Two of these ion sources are mounted in the beamline. It has been found that the spatial uniformity of the source plasma is not as good as expected in the design phase of the negative ion sources for JT-60U. The source plasma uniformity has been estimated through measuring spatial distributions of the arc current flowing into each filament group and also the ion saturation current with Langmuir probes placed at ten positions around the extraction area of the plasma grid. We then altered the relative values of the arc current-limiting resistors to the eight filament groups in each source to balance the arc. As a result of the optimization of the arc resistors, the nonuniformity of the source plasma has been reduced. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1150284
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  • 3
    Digitale Medien
    Digitale Medien
    Development and quality measurements of cold relativistic electron beam for low-γ free-electron lasers (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 2789-2793 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A relativistic electron beam source with low temperature (cold) using a field emission cathode and uniform electrostatic acceleration has been developed for use in low-γ free-electron lasers. An energy of 0.51 MeV and a current of 60 A (200 A/cm2) were obtained. The energy spread and the angular velocity spread were measured to be ΔE/E=0.14% and β⊥/β(parallel) =4×10−2, respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.344205
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  • 4
    Digitale Medien
    Digitale Medien
    Generation of relativistic photoelectrons induced by an ultraviolet laser and their propagation characteristics in a longitudinal guiding magnetic field (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 2507-2512 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Photoelectrons from a metal surface irradiated by a pulsed ultraviolet laser were accelerated to relativistic energy to obtain a very cold and relatively high-current electron beam. Typical values of the transverse velocity component β⊥/β(parallel) were measured to be less than 8×10−3, which leads to a spread of the parallel energy component Δγ(parallel) /γ(parallel) of 1×10−4 or less. Propagation characteristics in a longitudinal guiding magnetic field were investigated. A nonadiabatic factor was defined to estimate the conservation of the magnetic moment of the electrons moving along the magnetic flux, and this was shown experimentally to be reasonable. Spacial controllability of the cross section of this electron beam was demonstrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.351066
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  • 5
    Digitale Medien
    Digitale Medien
    Determination of 6-mercaptopurine in plasma by mass spectrometry (1977)
    s.l. : American Chemical Society
    Analytical chemistry 49 (1977), S. 725-727 
    Details
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ac50014a015
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  • 6
    Digitale Medien
    Digitale Medien
    Age-related changes in skin wrinkles assessed by a novel three-dimensional morphometric analysis (2002)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 147 (2002), S. 0 
    Details
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Summary Background A system has been developed whereby the morphology of the skin surface can be evaluated directly in three dimensions. This system employs a non-invasive device that utilizes white light of halogen origin, and which allows the computation of wrinkle depth and width, and other parameters of skin surface morphology. Using innovative engineering, an optical system has been devised so that light is transmitted via a slit and can be used to measure not only replicas of the skin but also the skin surface directly. The measurement area is 6·4 × 6·4 mm, and the theoretical resolution with a × 50 magnification lens is within 12·5 µm. Objectives To use this system to study age-related changes in the morphology of wrinkles at the eye corner areas of women of varying ages. Methods One hundred and one healthy women (age range 20–80 years) residing in the Tokyo area were the subjects used in this study. Results Wrinkles demonstrated a rapid increase in depth in women aged 40 years or older, and plateaued at the age of 60 years. Surface morphology parameters yielded results similar to those of age-related changes in wrinkles. Conclusions This new analytical system provides a rapid and convenient non-invasive method to evaluate skin surface morphology in three dimensions, especially with respect to wrinkle formation. The results obtained using this system provide a deeper insight into the mechanistic relationship between wrinkles and skin elasticity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2133.2002.04874.x
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  • 7
    Digitale Medien
    Digitale Medien
    Antiplasticization and abrasion resistance of polycarbonates in the charge-transport layer of an organic photoconductor (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 4588-4596 
    Details
    ISSN: 1520-5835
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ma00044a020
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  • 8
    Digitale Medien
    Digitale Medien
    π*–σ* hyperconjugation mechanism on the rotational barrier of the methyl group (I): Substituted toluenes in the ground, excited, and anionic states (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 2168-2174 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: We theoretically investigate the internal rotations of the methyl group in substituted toluenes such as fluorotoluene (-F), toluidine (-NH2), cresol (-OH), and tolunitrile (-CN) in the ground, excited, and anionic states. The calculated rotational barriers reproduce well the experimental data. Orbital pictures are given for the barrier variations by excitation and electron attachment. An idea of π*–σ* hyperconjugation is introduced for a comprehensive interpretation of the barrier variations. The π*–σ* hyperconjugation mechanism clarifies the differences among ortho-, meta-, and para-systems, between π-electron donating and accepting substituents, and between first and second excited (anionic) states. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.482029
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  • 9
    Digitale Medien
    Digitale Medien
    The effect of gravity on surface temperatures of plant leaves (2003)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 26 (2003), S. 0 
    Details
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: A fundamental study was conducted to develop a facility having an adequate air circulation system for growing healthy plants over a long-term under microgravity conditions in space. To clarify the effects of gravity on heat exchange between plant leaves and the ambient air, surface temperatures of sweet potato and barley leaves and replica leaves made of wet paper and copper were evaluated at gravity levels of 0.01, 1.0, 1.5 and 2.0 g for 20 s each during parabolic aeroplane flights. Thermal images were captured using infrared thermography at an air temperature of 26 °C, a relative humidity of 18% and an irradiance of 260 W  m−2. Mean leaf temperatures increased by 0.9–1.0 °C with decreasing gravity levels from 1.0 to 0.01 g and decreased by 0.5 °C with increasing gravity levels from 1.0 to 2.0 g. The increase in leaf temperatures was at most 1.9 °C for sweet potato leaves over 20 s as gravity decreased from 1.0 to 0.01 g. The boundary layer conductance to sensible heat exchange decreased by 5% when the gravity decreased from 1.0 to 0.01 g at the air velocity of 0.2 m s−1. The decrease in the boundary layer conductance with decrease in the gravity levels was more significant in a lower air velocity. Heat exchange between leaves and the ambient air was more retarded at lower gravity levels because of less sensible and latent heat transfers with less heat convection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-3040.2003.00980.x
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  • 10
    Digitale Medien
    Digitale Medien
    Survival from DIC following amniotic fluid embolism (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 36 (1981), S. 0 
    Details
    ISSN: 1365-2044
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: A 30-year-old multigravida of 38 weeks gestation bled profusely at delivery. Coagulation studies revealed disseminated intravascular coagulation and a diagnosis of amniotic fluid embolism was made. Treatment consisted of transfusion of whole blood and administration of a synthetic serine proteinase inhibitor, FOY. Approximately two hours after administration of the latter, bleeding began to cease and vital signs became stable. The patient survived without sequelae.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2044.1981.tb10244.x
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