#garfield Logs

May 24 2012

16:46 katsmeow-afk > >> The MCP channels, as with PMTs, have "dynode wear". The secondary
16:46 katsmeow-afk > >> electron emission coefficient goes down with the total coulombs
16:46 katsmeow-afk > >> through the channel.
16:46 katsmeow-afk > in what way? how?
16:46 katsmeow-afk > > However there's no intensity control on them as on the
16:46 katsmeow-afk > > mcp crt, we can limit the initial drive to the mcp. Does this not help
16:46 katsmeow-afk > > lengthen life?
16:46 katsmeow-afk >
16:46 katsmeow-afk > Wrong. There is an MCP gain control on things like image intensifiers.
16:46 katsmeow-afk > The life degrades directly with the coulombs through them.
16:47 katsmeow-afk > so it's the coulombs
16:47 katsmeow-afk > > How does one express "dynode wear" as a function of hours of use at
16:47 katsmeow-afk > > average readable screen intensity?
16:47 katsmeow-afk >
16:47 katsmeow-afk > Dynode wear goes with the coulombs.
16:47 katsmeow-afk yeas, it's the coulombs, got it
16:47 katsmeow-afk > > And how does it compare to
16:47 katsmeow-afk > > the regular electron gun "wear" in the tube neck of a non-mcp crt?
16:47 katsmeow-afk >
16:47 katsmeow-afk > Cathode emission degredation is well documented in the literature. It
16:47 katsmeow-afk > depends on a number of things.
16:47 katsmeow-afk prolly the coulombs
16:47 katsmeow-afk Ok, am all wrong, you are proficient in pmt and mcp, can you get
16:47 katsmeow-afk off that knowledge and share it with others?
16:47 katsmeow-afk Thanks,
16:47 katsmeow-afk Kat
16:48 katsmeow-afk damned uncooperatve humans
16:49 katsmeow-afk praps they need some coulombs
18:45 zhanx going out camping and fishing all weekend tomorrow morning
19:00 katsmeow-afk sounds nice
19:00 katsmeow-afk careful with cameras and boats
19:03 zhanx no boat this time
19:04 katsmeow-afk ok
19:27 tsmeow-afk has an appointment next week with lawyer to discuss bankru
19:33 rue_mohr find someone who wants your neighbour taken out
20:56 katsmeow-afk that doesn't seem to be an approved question
20:56 zhanx for me it is
20:58 katsmeow-afk sure, but asking for it is a cime
20:58 katsmeow-afk crime
20:58 katsmeow-afk knowing it might happen is a crime
20:58 katsmeow-afk either way, if it happens now, they'll arrest me