Hodoscope

The need for this detector arose after the analysis of HPS 2015 and 2016 data.

1. It turned out that most of Top <-> Bottom cluster pairs from the "pair1" trigger, are so called Wide Angle Bremsstrahlung (WAB)
2. There are significant number of events where electron from the pair, travels through the ECal hole, and hence missing detection.
   • At high Esum region, these events are almost equal to the number of events, where the pair electron hit's the ECal.
   • Hence recovering these events, will almost double the statistics at high ESum region.

e- gamma events, vs e-e+ events

The Engineering design of the Hodoscope