Index of Refraction
Scintillation Measurements
Indiana Tests
Sincintillation Tester
- The detector oil was put in the scintillation tester on July 10, 2002
and the system has been running continuously since then. For details about
the test setup see the scintillation page. All triggers give about the
same timing distribution as shown in the following figure:
In this figure, the black curve is the basic experiment trigger, T34. The red curve is V1T2.T34, requiring the cosmic ray to pass through the center of the upper veto and through the small lower trigger counter. The blue histogram is the CR trigger with the upper and lower vetos defining the aperature of the experiment (this is the trigger the detector was designed for.
Assuming that the three curves are the same, then the long tail on the T34 triggers can be fit for the scintillation time. That is one in the following figure:
The fit tail has a decay time of about 4 nsec. The zero time peak is still a mystery to us.
Cosmic Ray Tests