Difference between revisions of "October 22, 2008"
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[[Image:Run229_Nai_Spectrum.gif|300px|thumb|NaI spectrum monitoring the photon flux during run 229]] | [[Image:Run229_Nai_Spectrum.gif|300px|thumb|NaI spectrum monitoring the photon flux during run 229]] | ||
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[[Image:Run229RefDet.gif | 300 px]] | [[Image:Run229RefDet.gif | 300 px]] | ||
[[Image:Run229DetAup.gif | 300 px]] | [[Image:Run229DetAup.gif | 300 px]] | ||
[[Image:Run229DetCside.gif | 300 px]] | [[Image:Run229DetCside.gif | 300 px]] | ||
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[[Image:Run229RefDetNorm.gif | 300 px]] | [[Image:Run229RefDetNorm.gif | 300 px]] | ||
[[Image:Run229DetAupNorm.gif | 300 px]] | [[Image:Run229DetAupNorm.gif | 300 px]] | ||
[[Image:Run229DetCsideNorm.gif | 300 px]] | [[Image:Run229DetCsideNorm.gif | 300 px]] | ||
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==Run 234== | ==Run 234== | ||
Revision as of 20:27, 23 October 2008
Unpolarized Measurents:
A 2x4x8" aluminum brick was placed at the HRRL export in order to destroy the photon polarization. Rate measurements were made with the descriminator and HV settings used the past week. Then the constant fraction descriminator was replaced with a threshold descriminator on two detectors but not the reference detector.
ADC =0 => Reference Detector D
ADC = 1 => NaI
ADC=2 => Detector C
ADC = 3 => Detector A
channel # * 0.1675 ns/chan => ns
Root command to create and manipulate histograms
root [24] TH1F *RefDetRun229=new TH1F("RefDetRun229","RefDetRun229",800,0,800); root [25] PhotoFis->Draw("evt.ADCval*0.1675 >> RefDetRun229","evt.ADCnum==0 && evt.LastADCval>0");
Default HV and CF descriminator
Matched HV and Threshold Descriminator
2 Runs were taken with the following settings
100 ms Threshold descrimnaotr
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Run 229
Run 234
Asym
300 px 300 px 300 px 300 px 300 px 300 px
http://www.iac.isu.edu/mediawiki/index.php/October_Fission_HRRL_Measurements_2008 go back