Seminars/Colloquia

MLL-Kolloquium: Klaus Achterhold (Physik Department, TUM): The Munich Compact Light Source: how it works and first results

Thursday, 12 January 2017 from to (Europe/Berlin)
at LMU building, Am Coulombwall 1, Garching ( Lecture Hall (ground floor west) )
Description
X-rays are used for diagnostic and treatment of diseases since the beginning of the
year 1896, only a few months after Conrad Roentgen discovered them. Already Roentgen
sought after high intensities: '... Judging by my experience up to now, platinum is the
best for generating the most powerful X-rays...' [1]. To overcome heating limitations,
Philips introduced, already in 1929, a rotating anode tube, the Rotalix Metalix. The trend
to even higher flux in the X-ray energy regime led to the first parasitic use of
synchrotron radiation in 1964 at the 6-GeV Deutsches Elektronen-Synchrotron (DESY) in Hamburg.
Nowadays third generation synchrotrons like APS, ESRF, Spring8 and PETRA III, produce high
brilliant X-rays with insertion devices like wigglers and undulators for use in an
uncountable number of research areas. Drawbacks of synchrotrons are their running costs
of more than 100 million EUR per year and their sizes with circumferences of nearly 1000 m,
not feasible for universities, clinics, companies or museums.

The 'Munich Compact Light Source' (MuCLS) is the first commercially sold, lab sized
compact synchrotron, which produces monochromatic X-rays by inverse Compton scattering
of IR photons at relativistic electrons. With a brilliance of a few orders of magnitude
higher than that of rotating anode devices and comparable to that of bending magnets at
modern synchrotron sources, it is preferable, because it is available for every days use.
The X-ray energy has a monochromaticity of about 3% and is tunable between 15 keV and
35 keV with a field of view of up to 7 cm in 16 m distance, appropriate for small animal
models and clinical specimens [2].

In the talk, the physics and technical aspects of MuCLS are discussed. First results of
biomedical imaging experiments obtained at TUM are presented.

[1] W.C. Roentgen, A new form of radiation, Science (1896) 72, 726-729
[2] E. Eggl, M. Dierolf, K. Achterhold, C. Jud, B. Guenther, E. Braig, B. Gleich and
F. Pfeiffer, The Munich Compact Light Source: initial performance measures, J. Synchrotron
Rad. (2016) 23, 1137-1142, http://dx.doi.org/10.1107/S160057751600967X
Material:
Organised by Peter Thirolf (LMU) / Norbert Kaiser (TUM)