Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Peter K. Frederiksen"'
Publikováno v:
The Journal of Physical Chemistry A. 110:7375-7385
Singlet molecular oxygen, O2(a1Deltag), can be produced upon resonant two-photon excitation of a photosensitizer. In the present study, two molecules that have received recent attention in studies of nonlinear organic materials were characterized for
Autor:
George Gutman, K D Joensen, Paul Gorenstein, Herbert W. Schnopper, Eric Louis, I. L. Rasmussen, H-J Voorma, Peter K. Frederiksen, H.-J. Wiebicke, Allan Hornstrup, Konstantin N. Borozdin, Marc Legros, Niels J. Westergaard, Ulrich Geppert, E. H. Silver, Ingolf Halm, James L. Wood, Finn Erland Christensen, N.B. Koster, Salim Abdali
Publikováno v:
Journal de Physique III. 4:1599-1612
Nanometer scale structures such as multilayers, gratings and natural crystals are playing an increasing role in spectroscopic applications for X-ray astrophysics. A few examples are briefly described as an introduction to current and planned applicat
Autor:
Peter K. Frederiksen, Allan Hornstrup, C. Nilsson, S. Henrichsen, Finn Erland Christensen, Niels J. Westergaard, Herbert W. Schnopper, M.M. Madsen, P. Jonasson, P. Grundsoe, E. Jacobsen, P. Ørup
Publikováno v:
Journal of X-Ray Science and Technology. 2:81-94
A versatile x-ray diffractometer is described in detail. Two applications to the study of x-ray optical elements are presented. The first is a Bragg reflection study of state-of-the-art multilayers deposited both on conventional Si-wafer substrates a
Autor:
Katherine J. Schafer-Hales, Kevin D. Belfield, Peter K. Frederiksen, Emmanuel Vrotsos, Sheng Yao, Kiminobu Sugaya
Publikováno v:
Biomedical Optics.
A new series of high-performing two-photon absorbing fluorescent contrast agents for cellular imaging were prepared. The spectral properties of these photostable, highly fluorescent, fluorophores, along with two-photon fluorescence imaging of live ce
Publikováno v:
Journal of the American Chemical Society. 123(6)
Singlet molecular oxygen (a(1)Delta(g)) has been produced and optically detected upon two-photon nonlinear excitation of a sensitizer with a focused laser beam. The experiments were performed using toluene solutions with either a substituted difurano
Autor:
Oleg V. Stekolchikov, Valentin K. Sysoev, Finn Erland Christensen, Oleg V. Terekhov, I. L. Rasmussen, Josef Polny, Peter K. Frederiksen, Konstantin N. Borozdin, H.-J. Wiebicke, Tatyana Litvinova, Sergei N. Aleksashkin, Roald S. Kremnev
Publikováno v:
SPIE Proceedings.
This paper describes the design and the successful integration of the optical block of the SODART telescopes to be flown on the Spectrum Roentgen Gamma satellite. The integration involves both the integration of the two high throughput x-ray telescop
Autor:
Robert A. Lewis, Niels J. Westergaard, Peter K. Frederiksen, Finn Erland Christensen, Salim Abdali, P. Jonasson, Carl Budtz-Joergensen, Chris Hall, Josef Polny, Brent Madsen, Allan Hornstrup
Publikováno v:
Grazing Incidence and Multilayer X-Ray Optical Systems.
The on- and off-axis imaging properties and effective area of the two SODART flight telescopes have been measured using the expanded beam x-ray facility at the Daresbury synchrotron. From on-axis measurements the encircled power distribution and the
Autor:
Chris Hall, Peter K. Frederiksen, Salim Abdali, Herbert W. Schnopper, Hans Ulrich Noergaard-Nielsen, Finn Erland Christensen, Allan Hornstrup, Robert A. Lewis, P. Grundsoe, Josef Polny, Niels J. Westergaard
Publikováno v:
X-Ray and Extreme Ultraviolet Optics.
The on- and off-axis imaging properties of the first of two SODART flight telescopes have been studied using the expanded beam x-ray facility at the Daresbury synchrotron. From on- axis measurements the encircled power distribution and the point spre
Autor:
Niels J. Westergaard, Carl Budtz-Joergensen, Herbert W. Schnopper, Allan Hornstrup, Robert A. Lewis, Chris Hall, Hans Ulrich Noergaard-Nielsen, Salim Abdali, Peter K. Frederiksen, Josef Polny, P. Jonasson, Konstantin N. Borozdin, Finn Erland Christensen, P. Grundsoe
Publikováno v:
SPIE Proceedings.
The imaging properties of a test model of the SODART telescopes have been studied using an expanded beam X-ray facility at the Daresbury synchrotron. The encircled power and the point spread function at three energies 6.627 keV, 8.837 keV and 11.046
Autor:
Allan Hornstrup, Finn Erland Christensen, Konstantin N. Borozdin, Chris Hall, Robert A. Lewis, Herbert W. Schnopper, P. Grundsoe, Salim Abdali, Peter K. Frederiksen
Publikováno v:
SPIE Proceedings.
A facility for the calibration of X-ray Space Instrumentation has been established for the Daresbury Synchrotron. The facility provides a continuously tunable beam with (Delta) (lambda) /(lambda)