All in-vessels activities will be performed using remote handling tools. Here you see the boom at a teststand.

After the very successful experimental campaigns C15 to C19, JET has now entered the 2007 “Shutdown” period. During the next months, a number of new systems that will significantly improve JET’s capabilities will be installed. These include a new “ITER-like” Ion Cyclotron Resonant Heating (ICRH) antenna. The installation follows a variety of tests carried out in the test bed. The antenna features a new design aiming at optimising the power coupled to the plasma in a variety of conditions minimising the power reflected, therefore, making the heating more efficient. The experiments to be carried out with the “ITER-like” ICRH antenna constitutes an important validation of the design and it will provide valuable input into the use of similar heating techniques in ITER. Another JET enhancement is the installation of a high frequency pellet injection system, which is capable of shooting small cubes of deuterium ice into the plasma. The motivation for doing this is to have a direct fuelling method for the plasma core and to mitigate instabilities located in the plasma edge (Edge Localised Modes). Additionally, many refurbishments will be carried out, with more than 3000 individual tasks in total. These include also interventions in the Neutral Beam Injection (NBI) systems, correcting faults that occurred during the past experimental campaigns and preparing it in view of further enhancements of the NBI system, aiming at increasing the total heating power. In this Shutdown all in-vessel activities will be performed by remote handling. The preparation for the remote handling activities is well under way, with the required enclosures installed in the torus hall. In addition, a number of tasks related to the upgrade of the diagnostic systems are also being carried out. In particular, the second antenna for the Alfven Eigenmodes Active Excitation System will be installed during this shutdown.