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Simulation for Data Taking Runs and Test Run Results

There are several codes available for estimating electron rates and backgrounds for inelastic electron scattering. However, they are based on different mechanisms and give out different results for the kinematics of E99-117. The pion background is predicted to be high, which will be the crucial point of the following data analysis. Positron background is also predicted to be nontrivial and positron runs are necessary.

To further pin down the event rates, testruns have been done in August of 2000 and the results were compared to different codes. The final rates are results from whitlow for electron, rosetail for elastic tail, and from wiser for pion and positron, plus a correction factor obtained from the testruns.


Xiaochao Zheng 2001-06-09