[Neutron] International PhD School on Radiography Techniques and Analysis

[Heloisa N. Bordallo]

Dear colleagues,

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.

Detailed information as well as the registration form are available at 
https://indico.nbi.ku.dk/conferenceDisplay.py?confId=464

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.

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

 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.

*The school is limited to 20 students to be selected from the 
applications received. There is no fee for the participants. *

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.

*Students that full fill all the requirements of the classes will get 5 
ECTS for this course.
*
*Organizers: *Heloisa N. Bordallo (bordallo at nbi.ku.dk) Robert 
Feidenhans'l (robert at nbi.ku.dk) Markus Strobl (markus.strobl at esss.se)

Best regards,

-- 
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
bordallo at nbi.ku.dk

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