A system for additively manufacturing a three-dimensional object , the system comprising: an irradiation device configured to emit an energy beam having a manufacturing power level selected to additively manufacturing a three-dimensional object by irradiating a powder material , the irradiation device comprising a beam source , one or more beam positioning elements disposed downstream from the beam source , a beam splitter disposed downstream from the one or more beam positioning elements , the beam splitter configured to split a measurement beam from the energy beam , and one or more beam sensors configured to determine one or more parameters of the measurement beam , the measurement beam propagating along a measurement path to the one or more beam sensors , and the energy beam propagating along an irradiation path to the powder material ; and a controller configured to perform one or more beam alignment operations when irradiating the powder material with the energy beam to additively manufacture the three-dimensional object , the one or more beam alignment operations determined based at least in part on the one or more parameters of the measurement beam ; wherein the one or more beam alignment operations comprises: determining with the one or more beam sensors , position information of the energy beam based at least in part on the one or more parameters of the measurement beam ; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors . an irradiation device configured to emit an energy beam having a manufacturing power level selected to additively manufacturing a three-dimensional object by irradiating a powder material , the irradiation device comprising a beam source , one or more beam positioning elements disposed downstream from the beam source , a beam splitter disposed downstream from the one or more beam positioning elements , the beam splitter configured to split a measurement beam from the energy beam , and one or more beam sensors configured to determine one or more parameters of the measurement beam , the measurement beam propagating along a measurement path to the one or more beam sensors , and the energy beam propagating along an irradiation path to the powder material ; and a controller configured to perform one or more beam alignment operations when irradiating the powder material with the energy beam to additively manufacture the three-dimensional object , the one or more beam alignment operations determined based at least in part on the one or more parameters of the measurement beam ; wherein the one or more beam alignment operations comprises: determining with the one or more beam sensors , position information of the energy beam based at least in part on the one or more parameters of the measurement beam ; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors . determining with the one or more beam sensors , position information of the energy beam based at least in part on the one or more parameters of the measurement beam ; and aligning the energy beam at least partially with an optical axis of the irradiation device at least in part by adjusting a position of the one or more beam positioning elements based at least in part on the position information determined with the one or more beam sensors . <EOS>