Start Counter Operations

Start Counter Operations

Performance studies of the start counter over time. As can be seen in the following plots is that the response of the start counter paddle to hits in the nose cone is much stronger (yielding more photons) than in the straight section. Also, there is not much of a variation seen in the response for hits along the straight section.

• Detector response as a function of z location over time. The z-bin starts with 60cm and each bin covers 2cm so bin 2 is 62-64 cm and bin 17 is 84-86 cm. As an example paddle 3 bin 7 and bin 15 are compared between run 41835 and run 90660. It is clear that in the nose section (bin 15) the response is much larger (meaning more photons reach the SiPM)
  
  • Run 51260
    
  • Run 71560
    
    mean adc response and width ratio for different z bins 1, 5, 10, 15. Use run 41835 as reference to some 70k runs
    
  • Run 81715
    
  • Run 90660
    
  • Run 111885
    
  • Run 120848