Cartridge chamber of extraction system

A method for using a cartridge in a device, the method comprising:

• brewing an ingredient in the cartridge by supplying a brewing liquid, the device having a upstream cartridge enclosing part and a downstream cartridge enclosing part relatively movable between an open position for inserting and/or removing the cartridge and a closed position for forming a brewing chamber enclosing the cartridge during brewing, the brewing chamber has a confining expansion space which is unoccupied by the cartridge when the upstream cartridge enclosing part and the downstream cartridge enclosing part are in the closed position enclosing the cartridge and occupied by the cartridge upon expansion thereof caused by exposure of the ingredient to the brewing liquid to produce a beverage, the confining expansion space is delimited by a groove or recess adjacent to a peripheral portion of the cartridge when the cartridge is enclosed by the upstream cartridge enclosing part and the downstream cartridge enclosing part.