R&D studies on gas mixtures for resistive plate chambers in the ALICE experiment at CERN.
Resistive plate chambers (RPC) are used for the muon systems in the experiments of the Large Hadron Collider at CERN. Currently the gas mixture for RPC detectors in ALICE involves flammable and greenhouse gases. Isobutane is a flammable gas, whereas the global warming potentials for tetrafluoroethane and sulfur hexafluoride are extremely high. This contribution presents the R&D studies focused on building a gas mixture without flammable gases. In addition, a new type of gases (hydrofluoroolefins) for RPC detectors will be discussed. Hydrofluoroolefins are more eco-friendly and possibly may provide the same performances as the existing greenhouse gases.