Posted on: 15th April 2011

In total JET has more than 100 different diagnostic systems. In this shutdown another new diagnostic system has been installed on a port on top of JET.  The infrared camera has a view of the divertor region on the bottom of the torus. It is a copy of an existing system at octant 5.

This camera is not installed for wall protection like many of the other new cameras but to study the physics of the interaction of the plasma with the divertor.  In particular it will be used to study the behaviour of ‘ELMs’.

The camera is close to one of the poloidal field coils, so it is enclosed within a 250 kilogram shield made of ‘soft iron’ to protect it from the strong magnetic fields.