Harry Van Der Graaf
(NIKHEF)
16/02/2010, 14:00
Invited Talk
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...
Paul Colas
(CEA/Irfu)
16/02/2010, 14:50
Contributed Talk
The energy and spatial resolutions of a Micromegas detector is fundamentally limited by gain fluctuations, among other sources of degradation of these resolutions. Also the precise shape of the gas gain distribution determines the efficiency for single electron detection. These two reasons motivate our study of avalanche size fluctuations, using a new tool which is a combination of an...
Marco Villa
(CERN)
16/02/2010, 15:15
Contributed Talk
Recent developments on large area Gas Electron Multipliers (GEMs) will be presented.
In 2008, a triple GEM detector prototype with area of ~2000 cm2 was built. GEMs of such dimensions had not been made before and innovations to the existing technology had to be introduced in order to build this detector. A manufacturing process based on a single mask photolithographic technique allowed...
