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  • 1990-1994  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Laser diode based electro-optic measurement system with high voltage resolution (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1081-1084 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A laser diode based probing system for the electro-optic measurement of fast electrical wave forms has been developed. The system has been optimized to yield a very high voltage sensitivity of 5 mV/(square root of)Hz which is only a factor of 1.4 above the shot noise limit. Furthermore, by a proper orientation of the crystal probe the sensitivity to field components parallel to the propagating laser beam are greatly enhanced and absolute voltage measurements are thus made possible which is also verified experimentally. The temporal resolution is limited by the duration of the laser pulses which in our case is below 40 ps. A comparison with electrical sampling measurements shows the good performance of the detection system. Because of its low invasiveness the electro-optic crystal probe can be applied to wave form measurements on lines within integrated circuits as well as for interconnects on board level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144128
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    γ-γ-processes in ultrarelativistic heavy ion collisions and the dilepton continuum (1992)
    Springer
    The European physical journal 54 (1992), S. 419-423 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The contribution of the coherent γ-γ-production mechanism to continuum dileptons in central heavy ion collisions is studied theoretically. The characteristic features of the process are discussed and the importance of the mechanism at SPS, RHIC and LHC energies is assessed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01559459
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Unravelling γγ dileptons in central relativistic heavy ion collisions (1993)
    Springer
    The European physical journal 60 (1993), S. 95-100 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using an impact parameter formulation, differential production probabilities for γγ dileptons in central relativistic heavy ion collisions at RHIC and LHC energies are calculated and compared to Drell-Yan and thermal ones. The angular distributions of the leptons give a handle for the discrimination. Nuclear stopping leads, apart from Bremsstrahlung pair production, to a modification of the pure γγ dilepton production. These modifications are studied in a simple model and are found to be of minor influence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01650434
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Investigation of the sequential break-up mode6Li→6Li*(31 +)→α+d of 156 MeV6Li projectiles on208Pb in the very forward angular hemisphere (1991)
    Springer
    The European physical journal 339 (1991), S. 489-493 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.−z ; 25.70.Np ; 95.30.J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The sequential break-up of 156 MeV6Li projectiles colliding with208Pb has been investigated in the very forward angular hemisphere in order to explore the role of the Coulomb and nuclear interaction in inducing projectile break-up processes. The experiments use the Karlsruhe spectrograph “Little John” with a newly developed technique to detect efficiently break-up pairs ofα-particles and deuterons emitted with small relative energies and within a small opening angle. The observed differential cross section for the projectile excitation6Li→6Li* (I=3i +) has been analysed (together with forward elastic scattering) by a coupled channel approach, and various sensitivities to the nuclear potential and other ingredients have been studied. We conclude, that in the angular region below half the grazing angle the excitation is completely due to the Coulomb force. This feature is a basis for an application of the disintegration approach for studies of radiative capture cross section of astrophysical interest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288432
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    Paper (German National Licenses)
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