436 research outputs found
CASSCFEL-ASG Software Suite
No full textThe Max Planck Advanced Study Group (ASG) at the Center for Free Electron Laser Science (CFEL) has created the CFEL-ASG Software Suite CASS to view, process and analyse multi-parameter experimental data acquired at Free Electron Lasers (FELs) using the CFEL-ASG Multi Purpose (CAMP) instrument Strüder et al. (2010) [6].The software is based on a modular design so that it can be adjusted to accommodate the needs of all the various experiments that are conducted with the CAMP instrument. In fact, this allows the use of the software in all experiments where multiple detectors are involved. One of the key aspects of CASS is that it can be used either ‘on-line’, using a live data stream from the free-electron laser facility’s data acquisition system to guide the experiment, and ‘off-line’, on data acquired from a previous experiment which has been saved to file
Controlled charge extraction—antiblooming capabilities in pnCCD imaging sensors
No full textBlooming in a CCD occurs when the signal charges accumulating in a pixel exceed the pixel saturation level and spill over into adjacent pixels. They start to spill over the weakest threshold in the electric potential of the pixel structure resulting in a degradation of the spatial information. With antiblooming mechanisms, the spatial resolution of the incoming photons can be preserved, but the intensity information is lost in the overflowing pixels. For imaging experiments, relying on a precise image structure, the preservation of the spatial resolution at the expense of precise intensity information is a workable compromise. In contrast to insulated gate CCDs, notably MOSCCDs, the potential wells of the pixel array of a pnCCD are created by p+n junctions, allowing direct electric access to the pixel structure. This allows to directly drain off charges from the pixels and to define a drain level by applying the appropriate operation voltages. Charge packets from 1 000 to more than one billion signal electrons per readout frame were generated without observing a spillover into adjacent pixels. As soon as the saturation level of the pixel is reached, the excess charge carriers are removed through charge drains exclusively created with the modification of the electric potential of the pnCCD by the operation voltages. No additional antiblooming structures were implemented in the device and the pixel full well capacity of approximately 300 000 electrons in standard operation mode was preserved. A physical model of the antiblooming mechanism of pnCCDs with a pixel size of 75 μ m × 75 μ m was established by two-dimensional numerical device simulations and verified by experiments
High Speed X-ray Imaging and Spectroscopy with pnCCDs: XRF, XRD and PIXE measurements (and others)
No full textFor many years pnCCDs have been well known as X-ray detectors for spectroscopic imaging in
many fields of science: X-Ray Fluorescence analysis (XRF), X-ray Diffraction (XRD) with light
sources in large accelerator facilities as well as with laboratory light sources or with X-rays from
celestial sources in X-ray astronomy. A brief introduction in GEXRF (Grazing Emission XRF)
measurements with a laboratory laser produced plasma source will be given, PIXE (Particle Induced
X-ray Emission) measurements and D2XRF (Double Dispersive X-Ray Fluorescence) and Slicing
experiments with pnCCDs coupled to polycapillary optics performed at the BESSY synchrotron will
be shown. Energy-dispersive Laue diffraction with ultra-hard X-rays for the analysis of defects
in metals will conclude the overview of spectroscopic X-ray imaging measurements in the field of
structure and dynamics of matter
Neuartige Röntgendetektoren für die Astrophysik: Ortsauflösende Halbleiterdetektoren lösen Gas‐Proportionalzähler ab
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CASS—CFEL-ASG software suite
No full textThis program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)
Abstract
The Max Planck Advanced Study Group (ASG) at the Center for Free Electron Laser Science (CFEL) has created the CFEL-ASG Software Suite CASS to view, process and analyse multi-parameter experimental data acquired at Free Electron Lasers (FELs) using the CFEL-ASG Multi Purpose (CAMP) instrument Strüder et al. (2010) [6].
The software is based on a modular design so that it can be adjusted to accommodate the needs of all the various experiments that are conducted with the CAMP instrument. In fa...
Title of program: CASS
Catalogue Id: AEMP_v1_0
Nature of problem
Analysis and visualization of scientic data acquired at Free-Electron-Lasers
Versions of this program held in the CPC repository in Mendeley Data
AEMP_v1_0; CASS; 10.1016/j.cpc.2012.04.02
"Theoretical comparison between two different filtering techniques suitable for the VLSI spectroscopic amplifier ROTOR"
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