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Satoshi reported on the electron efficiency investigations. Comparing the parton level and Delphes level distributions, the efficiency is about 50%, flat in eta or pT. The isolation condition contributes by about 20% only. The efficiency in Delphes setting is set to 100%. When he removed the calorimeter entirely,the efficiency was recovered to 100%. It was suggested to try the default ATLAS detector setting instead of LHeC custom calorimeter geometry setting.