Speaker
Description
Excellent PID is an essential requirement of the ePIC experiment at the EIC, where hadron identification in the forward region will be provided by the dRICH detector, using as radiators both aerogel and gas.
The motivation for the choice of hexafluoroethane (C2F6) as dRICH radiator gas is illustrated and the challenges related to this choice are discussed.
The main requirements on the dRICH gas system and the characteristics of the proposed components are presented.
The option to perform separation of the gas mixture using selective permeability membranes as an alternative to distillation is illustrated.
The possibility of minimizing the environmental impact of the system operation is discussed.
The tools and techniques for qualifying and continuously monitoring the radiator gas are presented.
The use of modified Jamin interferometer for precise determination of the refractive index value and for very accurate monitoring is illustrated, presenting results from a prototype instrument.
Alternative options to hexafluoroethane, including the use of pressurized argon radiator, have been considered, and prototype tests and being prepared.
