PETRA III

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2019-03-19
10:37
[PUBDB-2019-01604] Report/Internal Report

Vacuum System Related Simulations for PETRA IV Using Numerical and Monte-Carlo Methods
[DESY-M-19-01]
43 pp. ()
This report summarizes vacuum system related calculations and simulations that are performed with respect to a conceptional design of PETRA IV. With assuming simple vacuumchamber geometries comparable to the design approach at MAX IV it addresses several key aspects of a conceptional design including the synchrotron radiation induced power load on vacuum chambers and other specific components, outgassing from photon stimulated desorption, pressure distributions, conditioning behavior and the saturation of dumping elements. [...]
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2019-03-01
11:48
OpenAccess [PUBDB-2019-01274] Journal Article
et al
Sensitivity comparison of absorption and grating-based phase tomography of paraffin-embedded human brain tissue
Applied physics letters 114(8), 083702 () [10.1063/1.5085302]  GO
Advances in high-resolution hard X-ray computed tomography have led to the field of virtual histology to complement histopathological analyses. Phase-contrast modalities have been favored because, for soft tissues, the real part of the refractive index is orders of magnitude greater than the imaginary part. [...]
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2018-12-14
12:14
Embargoed OpenAccess [PUBDB-2018-05476] Journal Article
et al
Influence of Iodine Doping on the Structure, Morphology, and Physical Properties of Manganese Phthalocyanine Thin Films
Doping with halide ions is a popular method toalter the properties of metal phthalocyanines (MPcs),particularly magnetic and electrical nature of organic semiconductorsfor applications in spintronic or electronic devices.Doping can cause a structural rearrangement in MPc packing,and the physical properties may be correlated with molecularpacking. Films of a planar and magnetic MPc, manganese-(II)phthalocyanine (MnPc), are chosen for iodine dopingstudy. [...]
Published on 2018-11-19. Available in OpenAccess from 2019-11-19.: Download fulltextPDF; Restricted: acs.jpcc.8b08205-Final - Download fulltextPDF Download fulltextPDF (PDFA); jp8b08205_si_001-Final - Download fulltextPDF Download fulltextPDF (PDFA); External link: Download fulltextFulltext
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2018-09-03
13:48
[PUBDB-2018-03341] Conference Presentation
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Retention of Particle Associated Radionuclides in Biota
2nd International Conference on Radioecological Concentration Processes, SevilleSeville, Spain, 6 Nov 2016 - 9 Nov 20162016-11-062016-11-09

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2018-09-03
11:42
[PUBDB-2018-03333] Contribution to a conference proceedings
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State-of-the-art tools for characterisation of particle exposure
4th International Conference on Radioecology and Environmental Radioactivity (ICRER), ICRER 2017, BerlinBerlin, Germany, 3 Sep 2017 - 8 Sep 20172017-09-032017-09-08 not applicable ()
Methods for high-resolution non-invasive image analysis of the internal distribution of radionuclides s as well as toxic metals in intact animals or organs have been demonstrated. The retention of radioactive particles observed for environmental samples as well as in laboratory experiments calls for better exposure characterization in impact assessments of particle contaminated areas, in particular when the biota is of relevance for the human food pathway..

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2015-09-03
11:30
OpenAccess [PUBDB-2015-03418] Journal Article
et al
Single Shot Polarization Characterization of XUV FEL Pulses from Crossed Polarized Undulators
Polarization control is a key feature of light generated by short-wavelength free-electron lasers.In this work, we report the first experimental characterization of the polarization properties of anextreme ultraviolet high gain free-electron laser operated with crossed polarized undulators. Weinvestigate the average degree of polarization and the shot-to-shot stability and we analyze aspectssuch as existing possibilities for controlling and switching the polarization state of the emitted light.The results are in agreement with predictions based on Gaussian beams propagation..
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2015-08-27
08:58
OpenAccess [PUBDB-2015-03292] Journal Article
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Static Magnetic Proximity Effect in $\mathrm{Pt/NiFe_2O_4}$ and Pt/Fe Bilayers Investigated by X-Ray Resonant Magnetic Reflectivity
The spin polarization of Pt in Pt/NiFe2O4 and Pt/Fe bilayers is studied by interface-sensitive x-ray resonant magnetic reflectivity to investigate static magnetic proximity effects. The asymmetry ratio of the reflectivity is measured at the Pt L3 absorption edge using circular polarized x-rays for opposite directions of the magnetization at room temperature. [...]
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