RE: Magnetic Field interference

["Morgan, Ben" <ben.morgan@cplc.com>]

Greetings:

I've seen a report of a reduction in counts due to magnetic field
interference with PMTs in a cabinet-type tool monitor. This occurred when
the monitor was used to survey an electric motor which had large, permanent
magnets in it.

We did some testing on a similar monitor and found that even a small magnet
can cause this effect if it's placed too near the PMT. 

Regards,

Ben

ben.morgan@cplc.com  

Question:

RADSAFERS,

Has anyone run across interference on PMT's that was due to magnetic fields?
If so,  I would appreciate any information you could forward to me.  

Thanks in Advance  

John L. Salladay, CHP
jlsalladay@mail.ports.navy.mil
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