Speaker
Harry Van Der Graaf
(NIKHEF)
Description
Since their invention in 1908 by Hans Geiger, gaseous detectors have played a major role in radiation technology. The lightness of gas, with the small quantity of primary ionisation as consequence, can be compensated by gas amplification. During the last decades, Si has become the favorite sensor material for position sensitive detectors, mainly due to the high possible granularity, and the relation with the rapid developments in micro-electronics.
By combining micro-electronic technology (i.e. pixel chips) with gas as sensor material, new position sensitive detectors are possible with new extremes in terms of radiation hardness and detector mass. In addition, 'digital' TPCs are possible, registering all individual primary electrons in four dimensions.
