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  • 1995-1999  (3)
  • 1998  (1)
  • 1997  (2)
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  • 1995-1999  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    A noninvasive bunch length monitor for femtosecond electron bunches (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 529-531 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A bunch length monitor for ultrashort (90 fs to 1 ps) electron bunches using a coherent synchrotron radiation detection techniques has been developed in a collaboration between the Thomas Jefferson National accelerator Facility (Jefferson Lab) and the University of Virginia. The noninvasive, high-resolution, high-sensitivity, low-noise monitor employs a state-of-the-art "bandpass" GaAs Schottky whisker diode operated at room temperature. This letter presents the monitor's performance. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.118423
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  • 2
    Digitale Medien
    Digitale Medien
    Biological verification of heavy ion treatment planning (1998)
    Springer
    Radiation and environmental biophysics 37 (1998), S. 47-51 
    Details
    ISSN: 1432-2099
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Physik
    Notizen: Abstract Chinese hamster ovary (CHO) cells and thermoluminescent detectors (TLD-700) were used for physical and biological verification of heavy ion treatment planning. Experiments were performed in a cylindrical water phantom, in some cases with lung and bone equivalent material in front of the target volume. The results confirm the possibility of using thermoluminescent detectors for a quantitative verification of dose distributions. CHO cells can be used at least for qualitative dose verification.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004110050091
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  • 3
    Digitale Medien
    Digitale Medien
    Computation of cell survival in heavy ion beams for therapy (1997)
    Springer
    Radiation and environmental biophysics 36 (1997), S. 59-66 
    Details
    ISSN: 1432-2099
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Physik
    Notizen: Abstract A simplified method for the calculation of mammalian cell survival after charged particle irradiation is presented that is based on the track structure model of Scholz and Kraft [1, 2]. Utilizing a modified linear-quadratic relation for the x-ray survival curve, one finds that the model yields linear-quadratic relations also for heavy ion irradiation. If survival is calculated as a function of specific energy, z, in the cell nucleus – thus reducing the stochastic fluctuations of energy deposition – the increase in slope of the survival curve and therefore the coefficient β z can be estimated with sufficient accuracy from the initial slope, α z . This permits the tabulation of the coefficients α z for the particle types and energies of interest, and subsequent fast calculations of survival levels at any point in a mixed particle beam. The complexity of the calculations can thereby be reduced in a wide range of applications, which permits the rapid calculations that are required for treatment planning in heavy ion therapy. The validity of the modified computations is assessed by the comparison with explicit calculations in terms of the original model and with experimental results for track-segment conditions. The model is then used to analyze the influence of beam fragmentation on the biological effect of charged particle beams penetrating to different depths in tissue. In addition, cell-survival rates after neutron irradiation are computed from the slowing-down spectra of secondary charged particles and are compared to experimental observations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004110050055
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