Path: utzoo!attcan!uunet!cs.utexas.edu!titan!heskett From: heskett@titan.tsd.arlut.utexas.edu (Donald Heskett) Newsgroups: sci.electronics Subject: Re: UV Detectors (was Need help ... is there any inexpensive device that) Message-ID: Date: 22 Jul 90 15:40:22 GMT References: <14380@venera.isi.edu> <1990Jul21.023806.12927@hayes.fai.alaska.edu> <5350@milton.u.washington.edu> <1990Jul22.013627.19744@hayes.fai.alaska.edu> Sender: news@titan.tsd.arlut.utexas.edu Organization: Applied Research Laboratories, University of Texas at Austin. Lines: 15 In-reply-to: ftpam1@acad3.fai.alaska.edu's message of 22 Jul 90 01:36:27 GMT The Hamamatsu Photomultiplier Tube catalog seems to show that most classes of photocatode material used in their PMTs have significant UV response. The 200K and 250M classes, in particular show wide responses, from roughly 120nm to roughly 300nm. The photocathode material in both cases is Cs-Te and the window material in both cases is synthetic silica. Hamamatsu devotes one of their catalogs to non-PMT phototubes (a.k.a., "phototubes"!). The R1187 phototube, with Cs-I photocathode and MgF2 window, shows the best short-end response, down to slightly below 120nm, though extending "redward" only to about 200nm. As I remember, Hamamatsu responds with their catalogs quite quickly. Also, college physics and astronomy departments are almost certain to have them on hand.