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*A beam enclosure has been constructed to shield observers from harmful UV light. It is made from Poly(methyl methacrylate)which filters 193nm light very well as shown by the following ([http://www.gclabsite.com/files/publication/gc47_p28.pdf graph]).
 
*A beam enclosure has been constructed to shield observers from harmful UV light. It is made from Poly(methyl methacrylate)which filters 193nm light very well as shown by the following ([http://www.gclabsite.com/files/publication/gc47_p28.pdf graph]).
[[File:PMMA_UV.png|center|thumb]]
+
[[File:PMMA_UV.png|center|600px]]
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