[RASMB] noisy interference data

[Leech, AP]

Mark,

Did you check the laser settings for ip2 and ip6? Was the run done
at very high speed? I have had similar looking traces when the laser
settings are wrong (especially angle and duration). You should be
able to see good fringe patterns at set-up time but the settings may
need trimming above 50000 rpm (at least this is the case on our
machine).

Best regards,

Andrew

On 24/02/2011 09:37, Mark Agacan wrote:
> Hello,
> I have attached a jpeg image showing recent SV interference data plots
> taken from sedfit.
> All data was collected with quartz windows as I was primarily interested
> in the absorbance @ 280 nm signal.
> IP2 and IP6 are very noisy but IP4 looks fine.
> Is this a calibration problem or is this related to damaged windows /
> centerpieces (there are no visible defects or scratches on any of the
> components).
> Many Thanks,
> Mark
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Dr Andrew Leech                   *  Laboratory Head
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