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Dear Collaborators,<br class="">

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We just completed a full reconstruction launch of the so-called low energy data we recorded in Fall 2018. For this data set, we measured the flux for photon energies between 3 and 6 GeV in order to compare cross sections with previous measurements. In addition,

 the coherent peak was shifted down to 7 GeV.

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<div class="">We used the halld_recon tag 'recon-2018_08-ver00’.</div>

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The 1200 REST files are can be found on the cache disk:<br class="">

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/cache/halld/RunPeriod-2018-08/recon/ver00/REST/<br class="">

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For realistic background in simulations, we extracted the random triggers and converted the signals to hddm:<br class="">

/cache/halld/RunPeriod-2018-08/recon/ver00/converted_random/<br class="">

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The histograms and efficiency trees can be found here:<br class="">

/cache/halld/RunPeriod-2018-08/recon/ver00/{hists,tree*}<br class="">

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A subfolder with merged histograms and trees is included in each folder.<br class="">

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The results are also visible on the usual monitoring web-pages:<br class="">

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<a href="https://halldweb.jlab.org/data_monitoring/Plot_Browser.html" class="">https://halldweb.jlab.org/data_monitoring/Plot_Browser.html</a><br class="">

<a href="https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/runBrowser.py" class="">https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/runBrowser.py</a><br class="">

<a href="https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/versionBrowser.py" class="">https://halldweb.jlab.org/cgi-bin/data_monitoring/monitoring/versionBrowser.py</a> <br class="">

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Best regards,<br class="">

Alex</div>

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