VUV lamp repair

Post date: Oct 1, 2014 4:25:50 AM

One day, our VUV source head suddenly showed a strange behaviour.

We checked the Ta foil inside the light source head and found it was heavily damaged.

We replaced the Ta foil to a new one, and tested the operation.

Unlike the normal operation, orange light remains after switched off the lamp. This indicates that the heat transfer from the Ta foil to the surrounding Cu wall is not enough. Actually, we could see not good contact between them.

We tried to improve the contact between them. The result is as follows.

With this condition, we tested the operation again.

Still, the orange light remains.