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Technical features

TomoLab is an X-ray micro-CT laboratory  based on a cone-beam geometry.
Two instruments are present in the lab. The first instrument, operational and open to external users since 2005, is equipped with a sealed microfocus X-ray tube, which guarantees a minimum focal spot size of 5 micron, in a voltage range from 40 up to 130 kV, and a maximum power of 39 W. A water cooled CCD camera providing a good combination between a large field of view (49.9 mm×33.2 mm) and a small pixel size (12.5×12.5 micron2) is used as detector. Due to the cone-beam geometry it is possible to achieve a spatial resolution close to the focal spot size. Wilkins & co. in 1996 have shown that radiographs made using the polychromatic beam from a microfocus X-ray generator do reveal phase jumps. Thanks to this property at the TomoLab it is possible to perform phase-contrast microCT measurements (also if a limited phase contrast with respect to a synchrotron X-ray beam could be achieved).



                        Lead cabinet installed at Elettra in ESP3, ground floor, room 014.                     Interior of the cabinet: the X-ray source, the sample stage
                                                                                                                                                                      and the
detector are visible. 
A second micro-CT scanner is at present under construction. The new instrument has beem fully customized and will be equipped with a sealed microfocus X-ray tube (maximum voltage = 150 kV, maximum power = 75 W, minimum focal spot = 5 microns). A flat panel detector with a minimum pixel size of 120x120 micronsand an active area of  265x215 mm2 will be permanently installed in the cabinet. With this detector, micro-CT scans in full field can be acquired in 6 minutes.
The system is fully open and flexible, then other types of available detectors can be employed.  The sample stage will allow a flexible acquisition geometry. In particular, helical and planar CT experiments are foreseen.                           


Last Updated on Friday, 19 January 2018 14:04