Ar laser failure
J.Webster at centenary.usyd.edu.AU
Sun Feb 16 22:09:44 EST 1997
At 03:39 PM 13/02/97 -0800, Karel Drbal wrote:
>I ask you whether anyone have recorded a strange laser failure (Ar-15mW,
>air-cooled) in the BD instrument (FACSort). It happens almost everyday during
>data acquisition. The laser power and current drops to zero and after
>minute come back to the normal value. Normal values for laser power and
>were OK. Nothing I have tested helps. The laser have 5000 hours which is
>to its lifetime.
>1) Could overheating be the cause?
Yes, it could.
Is the airflow obstructed?
Fan(s) not working?
Hot air exhaust restricted?
Does it go off repeatedly, or only once per day?
>2) How one can decide when the laser should be replaced?
I've never seen one go like yours; usually the current increases slowly
during the life of the tube, then one day it refuses to work.(ever again)
>Any other suggestions?
What does BD suggest?
What does the laser manufacturer suggest?
If a component is failing due to heat, it is likely to be some small
electronic bit rather than the laser tube.
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