Frontemare di Trieste
Istituto Nazionale di Fisica Nucleare
Sezione di Trieste

SI-EYE

  
 
 

1. Test of the system with particles beam

 

The silicon detectors tested in the Laboratory of Trieste for the WIZARD and NINA experiments were brought into orbit on the space station MIR in 1995. The detectors were carried, by an astronaut, in an apparatus created for studying a peculiar phenomenon which has been arising curiosity and bothering astronauts for many years. That is, when at rest with their eyes closed, astronauts have seen flashes of light.

 
 
 

2. Detector set-up

 

The collaboration WIZARD-RIM (Russian-Italian Missions) has set up a little telescope of silicon detectors, assembled on a helmet, which the astronauts can position in front of their eyes.

This simple but accurate instrument allows to establish a coincidence between the arrival of a particle and the flash seen by the astronaut and to determine the physical parameters of the particles.

The instrument has been successful and a second version is being realized in order to improve the accuracy of the measurements. Other space agencies have expressed their interest in this realization.

 
 
 

3. The basic element of the instrument includes a pair
of overlapped silicon detectors (in the centre of the picture) mounted on a ceramic frame, and the reading
and control electronics

  
 
 
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