A Hitchhikers Guide through the IceCube Detector - Department of ...
A Hitchhikers Guide through the IceCube Detector - Department of ...
A Hitchhikers Guide through the IceCube Detector - Department of ...
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SN Detection-Algorithm<br />
• pDAQ delivers raw rates (DOM-wise, 1.6384ms binning) SNDaq synchronizes and rebins data<br />
to 2ms binning >> fine for resolving most interesting structures in -signal<br />
• Analytic calculation <strong>of</strong> <strong>the</strong> kollektive rate deviation using Maximum-Likelihood<br />
Method (² -Minimization) in real time.<br />
2<br />
<br />
<br />
. <br />
<br />
2ln<br />
const<br />
L L<br />
<br />
<br />
<br />
<br />
<br />
Timo Griesel JIGSAW Workshop – Mumbai, India 22-26/02/2010 page 18/26<br />
DOM<br />
<br />
N DOM<br />
1<br />
2<br />
NDOM 2 N<br />
<br />
DOM<br />
i<br />
<br />
<br />
i<br />
ri<br />
i<br />
i<br />
<br />
<br />
<br />
2<br />
2<br />
2<br />
<br />
i0<br />
<br />
i <br />
i0<br />
<br />
i<br />
i0<br />
<br />
i<br />
• Estimate homogeneity <strong>of</strong> illumination over whole detector<br />
2<br />
N DOM<br />
r i<br />
<br />
i<br />
<br />
i<br />
<br />
N<br />
i0<br />
1<br />
2<br />
• Estimate significance <strong>of</strong> collective rate deviation on top <strong>of</strong> noise<br />
²(<br />
)<br />
<br />
<br />
<br />
i<br />
<br />
<br />
<br />
<br />
i<br />
<br />
<br />
i<br />
e<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
2<br />
ri<br />
i<br />
i<br />
2<br />
2<br />
i<br />
/ <br />
• Calculate and per DOM from 10‘ data (excluding current position) in multiple binning<br />
i<br />
i<br />
/ 6.5 p( ²)<br />
99.9%<br />
• Trigger Conditions. Significance<br />
<br />
and (for any binning)<br />
• DOM Disqualification (Per Bin) on mean value, broadening and skewness <strong>of</strong> rate distribution
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