GEMPIX Detector
- Details
- Last Updated: Tuesday, 23 August 2016 17:32
There is another device recently designed and realized within a collaboration between CERN and INFN that improves the portability and the spatial resolution of the GEM detectors for future medical and industrial applications. After important trials made by few groups in the past years, a compact triple GEM detector with CMOS pixel readout chip has been made, within the MEDIPIX and ARDENT collaborations.
 |
The GEMPIX consist of two main boards: one board has been specifically designed and realized in LNF-INFN, and consists of a new triple GEM layout with an active area of 28x28 mm2 that matches exactly the area of the four Medipixes. |
|
 |
The other board, already designed for other purposes, called Quad-Medipix, consist of a socket for a ceramic board that houses a 2x2 matrix of Medipixes CMOS readout chip as shown in figure. | |
 |
Some pictures taken for different particles A) Compton electron from Cesium 137 gamma B) Compton electron from Cobalt 60 gamma C) X-Rays from Iron 55 D) Alphas from Americium 241 |
|
 |
With the Pixelman program it is possible to acquire the particle traks in a time window ranging from few microsec up to seconds. Each track is constituted by several pixels 50x50 microns2. Each pixel measure the charge released or the time of arrival. In this picture some tracks are represented with the pixed colored as a function of the energy released inside the gas
|
|
 |
A typical energy distribution of X-rays emitted by 55Fe measured by the GEMPIX with the Pixelman acquisition set in TOT mode. |
Other details can be found here