Upgraded Thomson Scattering System at \hbox{DIII-D}

The \hbox{DIII-D} Thomson scattering system is undergoing a significant upgrade. Four new \hbox{1 Joule}, \hbox{50 Hz} ND:YAG lasers are being installed at \hbox{DIII-D}. These lasers will significantly increase the measurement frequency when they are added to the current set of eight \hbox{0.5 Joule}, \hbox{20 Hz} lasers. The increased laser power will also improve measurement accuracy. Installation of the new lasers required an expansion of the Thomson laser room, a replacement of the Thomson laser control system and an upgraded laser path to the \hbox{DIII-D} vessel. The upgrade plan and status as well as plans for the 2011 run campaign will be presented.