component can be guided there through and a fixture for retaining the component which features a section which entirely covers the opening of the chamber when the part not to be peened is at least partially guided into said opening and said section completely encloses the part not to be peened of the component between the adjacent region of the part to be peened of the component and the opening application_number US 22773907 A description the gas turbine 100 has inside it a rotor 103 rotary mounted about an axis of rotation 102 and having a shaft 101 said rotor also being designated as a turbine rotor an intake casing 104 a compressor 105 a for example toroidal combustion chamber 110 in particular annular combustion chamber with a plurality of coaxially arranged burners 107 a turbine 108 and the exhaust gas casing 109 succeed one another along the rotor 103 the annular combustion chamber 110 communicates with a for example annular hot gas duct 111 there for example four turbine stages 112 connected in series form the turbine 108 each turbine stage 112 is formed for example from two blade rings as seen in the direction of flow of a working medium 113 a guide blade row 115 is followed in the hot gas duct 111 by a row 125 formed from moving blades 120 the guide blades 130 are in this case fastened to an inner casing 138 of a stator 143 whereas the moving blades 120 of a row 125 are attached to the rotor 103 for example by means of a turbine disk 133 a generator or a working machine not illustrated is coupled to the rotor 103 when the gas turbine 100 is in operation air 135 is sucked in by the compressor 105.