Some comments on providing broadband light to users

Though the free-electron laser gain medium is inherently broadband and several labs have demonstrated wavelength tuning over a range of several octaves, it is quite challenging to deliver such a broad bandwidth to users. The challenge arises from providing high quality, high power light, transporting the light to the users, and providing diagnostics to the user over a very large wavelength range. This paper summarizes some of the issues which must be considered and discusses some of the solutions which user facilities around the world have used to address the problems