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Dear colleagues,
<br>
<br>
We are pleased to invite you to encourage your students to
participate at the PhD School on Radiography Techniques and Analysis
which will be held September 24 - September 28, 2012 at the Niels
Bohr Institute. This School is part of the the PhD program at the
University of Copenhagen.
<br>
<br>
Detailed information as well as the registration form are available
at <a class="moz-txt-link-freetext"
href="https://indico.nbi.ku.dk/conferenceDisplay.py?confId=464">https://indico.nbi.ku.dk/conferenceDisplay.py?confId=464</a>
<br>
<br>
Even if image contrast obtained from X-rays absorption is poorly
sensitivity to weakly absorbing objects consisting of light
elements, such as polymers and biological soft tissues, since the
discovery of X-rays, transmission imaging has been extensively used.
Nowadays, however, such drawback can be overcome due to the
development of X-rays phase imaging. In fact, X-rays phase imaging
based on grating optics has become widely used due to its practical
advantage, i.e. laboratory X-rays sources are quite competitive.
<br>
<br>
On the other hand, neutron radiography is a powerful tool for
non-destructive testing of materials for industrial applications and
research. This technique is complementary to X-rays and gamma-rays
radiography and finds applications in diverse areas. One practical
impact is the high contrast between hydrogen, which interacts very
strongly with neutrons, and most metals, which offer effective
transmission of neutrons. This is directly opposed to X-rays
imaging, and opens the possibility to effectively visualize the
dynamics of organic hydrogen-containing substances in metal
containers or to view plastic seals or lubricants embedded within
metal structures
<br>
<br>
From the experimental side, both X-rays and neutron radiography
involve placing an object in the path of the beam, and measuring the
shadow image of the object that is projected onto a detector.
However tomography takes a step further in the data collection
process and entails rotating the sample in the beam and recording
multiple 2D images through an angular range of 180°. From the data
set, a 3D representation through the object can be reconstructed.
This allows for detailed information, but also implies that the data
obtained by the imaging technique is huge the reconstruction of the
3D-image is computationally intensive. Several programs are
available commercially or have been placed in the public domain, but
are very difficult to understand and a lot of care has to be taken
in the reconstruction process. Consequently, it is essential to
establish advanced training of PhD student if we want to insure the
future scientific success of such powerful techniques.<br>
<br>
<b>The school is limited to 20 students to be selected from the
applications received. There is no fee for the participants.
</b><br>
<br>
The classes are structure as follows. The mornings will be devoted
to two lectures given by experts in the field, which will focus on
scientific potential of the imaging technique as well as on the
understanding of the data analysis process. In the first day of the
class the students will be given experimental results to analyze.
The process of data reduction will take place in the afternoons
under close supervision of the lectures. The results will present as
an oral contribution in the last day of the class.
<br>
<br>
<b>Students that full fill all the requirements of the classes will
get 5 ECTS for this course. <br>
</b>
<br>
<b>Organizers: </b>Heloisa N. Bordallo (<a
class="moz-txt-link-abbreviated" href="mailto:bordallo@nbi.ku.dk">bordallo@nbi.ku.dk</a>)
Robert Feidenhans'l (<a class="moz-txt-link-abbreviated"
href="mailto:robert@nbi.ku.dk">robert@nbi.ku.dk</a>) Markus Strobl
(<a class="moz-txt-link-abbreviated"
href="mailto:markus.strobl@esss.se">markus.strobl@esss.se</a>)
<br>
<br>
Best regards,
<br>
<pre class="moz-signature" cols="72">--
Heloisa N. Bordallo
Associate Professor (Lektor)
Niels Bohr Institute
(H.C. Ørsted Institute, bldg. D)
University of Copenhagen
Universitetsparken 5
2100 Copenhagen Denmark
Phone: +45 213 088 29
<a class="moz-txt-link-abbreviated" href="mailto:bordallo@nbi.ku.dk">bordallo@nbi.ku.dk</a>
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