New developments on Tore Supra data acquisition units

The Tore Supra data acquisition system (DAS) was designed in the early eighties and has considerably evolved since then. Three generations of data acquisition units still coexist. As cost and maintenance of different operating systems is expensive, it was decided to explore an alternative solution based on an open source operating system (OS) with a disk-less system for the fourth generation. In 2010, Linux distributions for VME bus and PCI bus systems have been evaluated and compared to Lynx OSTM real time OS. The results obtained allowed to choose a version of Linux for VME and PC platform for DAS on Tore Supra. In 2011, the Tore Supra DAS dedicated software was ported on a Linux disk-less PCI platform. The new generation was successfully tested during real plasma experiments on one diagnostic, called DCEDRE. (authors)