The  Beam Switchyard B-2 magnet (which steers particles into the A-Line) developed a low resistance to ground (800 ohms) on 23-APR-99. Investigation showed damage from arcing (melted connections between coils) and the magnet was removed from the accelerator housing.

Photos taken on 9-Feb-00 showing the damage (more extensive than anticipated in April of '99) to the magnet coils.

Click on the image to see a more detailed picture.

These are the three damaged coils. Burned insulation from the second coil is stuck to the first coil.

A close-up of the middle coil.

The top half of the magnet core, with deposited soot, and a view of the connections between the coils on the lower half of the magnet (notice that there are no belleville washers).