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e- gamma events, vs e-e+ events	Trident events, when the electron hit the ECal, and when e- traveled through the ECal hole, and escaped the detection

The hodoscope will be placed between the SVT vacuum chamber and the ECal.

One end of Support arms of the hodoscope are fixed to the 50 mm thick flange (yellow in the picture below), and other end holds tiles.

During the installation the SVT and the SVT vacuum flange will stay at the same position, while the ECal will be moved downstream by 50 mm,

in order to allow hodoscope flange to be installed.

The Engineering design of the Hodoscope