Detector Integration

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The EPIC Detector Coordinate System definition

For EIC the hadron beam is going counter clockwise and the lepton beam clockwise. The hadron beam defines the positive z axis and x points to the ring inside as would be correct for a right handed coordinate system.

• y-axis pointing to the sky
• x-axis pointing to the ring inside
• z-axis pointing along the ring in the direction of the hadron beam
• The origin (0,0,0) of this coordinate system is at EIC IP-6.
• The IP is in the EIC detector coordinate system at x=0, y=0, and z=0
• The RHIC IP is in the EIC detector coordinate system at x= -80.9883cm, y=0, z= +13.77mm

More information

• For more detailed information on the coordinate system and drawings please refer to this document
• Detector Models developed using Trimble Sketchup: https://eic.jlab.org/Menagerie/
• Experimental Solenoid: Wiki Link