From naranjo Mon Nov 15 23:28:05 2004
Date: Mon, 15 Nov 2004 23:28:05 +0000
To: michael.loughlin@ukaea.org.uk, APX077@coventry.ac.uk,
        nigel.hawkes@npl.co.uk, colin.murray.01@bbc.co.uk
Cc: puherman@ritva.physics.ucla.edu, camara@physics.ucla.edu,
        shopkins@scs.uiuc.edu
Subject: BBC 03 follow-up 1/3 - RF NOISE
Reply-To: Brian Naranjo <naranjo@physics.ucla.edu>

Hi,

I'd like to help answer a few questions about the experiment.
This is part one of three.

bbc_03_rf_noise.pdf
===================

SL PMT Noise Hits
-----------------
These pulses were caused by brush noise from the DC pump motor used
to filter the deuterated acetone in situ.  Real PMT pulses
are unipolar while these noise are bipolar, making them easy to
distinguish and reject in software.

Noise Trigger
-------------
There were maybe only a dozen false triggers obviously caused by
RF interference, such as this one.  In this trigger, there was similar noise
also present in both neutron detector channels.  These large RF pulses
were caused by a variety of sources in the lab: experiment refrigerator,
optical table air compressor, etc.

Brian
