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PESAN DAN TANGGAPAN :
Lowongan PhD : PhD-student position at Delft University of Technology
Oleh : M. Danang Birowosuto
Minggu, 18 September 2005 (19:02 WIB) dari IP 220.127.116.11
Kebetulan salahsatu supervisor saya menawarkan PhD,
silakan bagi yg berminat.
PhD-student position at Delft University of Technology
In the framework of EU project
Analysis by neutron resonant capture imaging and other emerging neutron techniques: new cultural heritage and archaeological research methods
We are looking for an
MSc in (Applied) Physics
The student will have to participate in the development of a neutron-computed tomography system to be tested/used at the pulsed neutron machine GELINA, Geel Belgium and ISIS, UK.
The PhD work will be focused on neutron-data analysis, computer simulation and instrument development. Eventually experiments will be done on archaeological objects.
Preferably the student should have some experience in one of the following topics: radiation detection, instrument development, data analysis, computer simulations (GEANT4)
ANCIENT CHARM project summary
A large variety of chemical, physical and microstructural techniques are employed to characterize objects of cultural significance. Most of these methods are invasive and probes like X-rays and charged particles have limited penetration power in matter. Neutrons, on the other hand, can penetrate thick layers without substantial scattering or absorption depending on their energy. While the potential of neutron-based techniques is large, their development is recent in most cases. Especially, no attempt has been made to use the unique resonance absorption properties of epithermal neutrons for quantitative 3D imaging.
Many elements have neutron absorption resonances in the epithermal energy range. Neutron absorption is followed by the prompt emission of a gamma-ray cascade, and both the gamma emission and the neutron transmission can be measured. Spatially resolved information can in principle be obtained by a combination of tight neutron beam collimation, multiple positioning of the sample, and simultaneous measurement of neutron resonances with different strengths and therefore able to effectively probe depth.
Developing the "Neutron Resonant Capture Imaging" combined with "Neutron Resonance Transmission" (NRCI/NRT) as a non-invasive technique for 3D tomographic imaging and its use in cultural heritage research is the ultimate aim of the ANCIENT CHARM project. The idea of developing an imaging technique based on epithermal neutron absorption is totally new and presents a number of scientific and technical challenges which are best addressed by the joint development of two related 3D imaging methods: Prompt Gamma Activation Imaging combined
with cold Neutron Tomography (PGAI/NT) and Neutron Diffraction Tomography (NDT). The three new imaging methods will provide a new, comprehensive neutron-based imaging approach, which will be applied here for the 3D imaging of elemental and phase composition of objects selected as a result of a broad scope archaeological research.
For more information contact
Prof. C.W.E. van Eijk (email@example.com), tel. +31 15 278 6559
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