Filament Lifetime

Harry Powell hrp1000 at
Fri Jan 16 05:04:47 EST 1998

On Thu, 15 Jan 1998, Randy Mann wrote:

> Hello All,
> Our filament lifetime on the Rigaku Generators Seems to be a lot shorter
> than it should be.  The average lifetime is a little over 600 hours.
> What is the optimum power settings for extended lifetime?  We are
> currently running at 50kv 100ma with a bias if 20 -30 %.  If anyone has
> any suggestions please let me know.

Try monitoring your vacuum; a really good vacuum seems to improve 
filament life. Sorry, I can't remember the mV readings as I haven't been 
near a generator for over a year:-( 

Dr Harry Powell, Automation Office, University Library, West Road, Cambridge,
CB3 9DR.              Telephone: +44 1223 333127         Fax: +44 1223 333160

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