Advanced collimator engineering for the nlc

The high beam intensities in the Next Linear Collider can damage the collimation system jaws if a failure of the electronic machine protection system allows the acceleration of a mis-launched pulse. We are developing a prototype collimator that will allow a new jaw surface to be moved into place after beam damage. We are also developing a prototype collimator based on continuously reforming the collimator jaws out of liquid metal. This second system would allow the use of smaller beam sizes, and thereby shorter beam line lengths in the collimation system. The status of both prototypes is presented