I do not understand what happened, but I failed to get this message on the list twice. Let's hope that I am successfull now, since I would like to get an answer within a short time. ----- Original Message ----- From: "SBD" <sbd@co.dnet.mindef.nl> To: <radsafe@romulus.ehs.uiuc.edu> Sent: Friday, August 11, 2000 8:35 AM Subject: Small X-ray source