Difference between revisions of "Qweak Inelastic FFTfile PMTLED"
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| − | The following frequencies appear | + | The following frequencies appear : 10,60,120,180, 240, 300 |
Revision as of 00:33, 8 November 2011
An attempt to use Richard Jone's FFT algorithm to filter out helicity events.
Below is a histogram of an LED shining onto a PMT in Qweak. Notice the multiple peaks in the asymmetry distribution.
Using Richard's FFT code File:FFTseries.cc RJ.txt
and the root commands
.L FFTseries.cc TH1* fft=FFTseries(Mps_Tree,"qwk_pmtled","hw_sum");
The following frequencies appear : 10,60,120,180, 240, 300