This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties.Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.Colli, PierluigiGilardi, GianniMarinoschi, GabrielaRocca, Elisabetta2016-03-242019-06-2820142198-5855https://doi.org/10.34657/2936https://oa.tib.eu/renate/handle/123456789/2897In this paper we study a distributed control problem for a phase-field system of Caginalp type with logarithmic potential. The main aim of this work would be to force the location of the diffuse interface to be as close as possible to a prescribed set. However, due to the discontinuous character of the cost functional, we have to approximate it by a regular one and, in this case, we solve the associated control problem and derive the related first order necessary optimality conditions.application/pdfeng510Phase field systemphase transitionsingular potentialsoptimal controloptimality conditionsadjoint state systemReport