We've used CdWO4 crystals for years. They are highly radiation resistant and colorless and give VERY bright fluorescence. Saint-Gobain has them in various forms. In principle you can mix your own CdWO4 from CdNO3 and NaWO4 ... under proper conditions you let the solution digest to form microcrystals. I tried this once, with no success, but it has been done in the literature.
Another option is terbium-doped borosilicate glass. Can be bought in "first-draw" fiber form from a company called Collimated Holes. This material is bright, colorless, can be melted and formed, but photobleaches in bright x-ray beams over time. Of course there is always cutting thin slivers of the plastic fluorescent sheet material everyone uses at beamlines. Not sure where they get that. Richard Gillilan MacCHESS On Feb 14, 2014, at 12:18 PM, Scott Classen wrote: > Hi Ronnie, > > We use YAG discs (Yttrium Aluminum Garnet). We buy small 10mm x 100um or > 500um thick discs, break them into shards, glue them to various alignment > jigs and they provide a very effective X-ray visualization tool. > Our latest supplier is Star Tech Instruments > (http://www.startechinstruments.com) > There are other suppliers, but it does take some calling around because > Google doesn't appear to be very helpful… unless you want 5000 lbs from a > supplier in China. > > Good luck, > Scott > > On Feb 14, 2014, at 7:54 AM, Ronnie wrote: > >> I am trying to find out where I can get the fluorescent material (just a >> small flat piece) I can glue to the tip of a pin for aligning the X-ray beam >> of our home source. Does anyone know? >> >> Thanks in advance! >> Ronnie >
