Changes

==Determining the η Cross Section==

==Determining the η Cross Section==

<p>The following is a brief overview of the analysis step used to calculate the cross section for the &eta; meson in the 2&gamma; final state Radphi dataset. While this analysis is specific to the Radphi detector dataset, many of the techniques are common in the nuclear/particle physics field and are useful in other experiments such as GlueX. These analysis wiki pages, while serving as an additional archive for my analysis, are mainly intended to serve as a tutorial for future graduate students. This work uses the Radphi pass-9-2020 dataset, which contains 2,578 individual ROOT format files. These files are located at /pnfs4/phys.uconn.edu/data/Gluex/radphi/pass-9-2020 . The pass-6-2014 dataset was used for Fridah Mokaya's analysis of the &omega; meson. The pass-6-2014 dataset used an algorithm designed by Fridah to merge Lead-Glass Detector (LGD) photon hits. While this algorithm was helpful in lower number photon final states such as the 3&gamma; dataset used for: &nbsp; &omega; &rarr; &pi;^o&middot;&gamma; &nbsp; & &nbsp; &omega; &rarr; &eta;&middot;&gamma; &nbsp; where &pi;^o, &eta; &rarr; 2&gamma;; it had an adverse effect on higher photon multiplicity final states.  </p>

<p>The following is a brief overview of the analysis step used to calculate the cross section for the &eta; meson in the 2&gamma; final state Radphi dataset. While this analysis is specific to the Radphi detector dataset, many of the techniques are common in the nuclear/particle physics field and are useful in other experiments such as GlueX. These analysis wiki pages, while serving as an additional archive for my analysis, are mainly intended to serve as a tutorial for future graduate students. This work uses the Radphi pass-9-2020 dataset, which contains 2,578 individual ROOT format files. These files are located at /pnfs4/phys.uconn.edu/data/Gluex/radphi/pass-9-2020 . The pass-6-2014 dataset was used for Fridah Mokaya's analysis of the &omega; meson. The pass-6-2014 dataset used an algorithm designed by Fridah to merge Lead-Glass Detector (LGD) photon hits. While this algorithm was helpful in lower number photon final states such as the 3&gamma; dataset used for: &nbsp; &omega; &rarr; &pi;^o&middot;&gamma; &nbsp; & &nbsp; &omega; &rarr; &eta;&middot;&gamma; &nbsp; where &pi;^o, &eta; &rarr; 2&gamma;; it had an adverse effect on higher photon multiplicity final states.  </p>

An Excel [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Bundle-Support-4-2021.xlsx spreadsheet] has been created to calculate the location of the bundle supports' mounting rods with respect to the focal plane coordinate system. This spreadsheet also calculates the length of the parallel railing end supports which need to be fabricated anew for each unique TAGM location on the focal plane. One last, but very important thing that the spreadsheet calculates is the shim size needed, during TAGM realignment, in order to achieve the proper tow angle between bundle supports during mounting. In addition to the spreadsheet, an AutoCAD [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Parallel_Railing_Parts.dwg drawing] used to design the three parallel rail components needed for each unique tagging energy spectrum starting position of the TAGM and a [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Beta-Angle12_5-to-11_06deg_modified.dwg drawing] for the current setup (&beta; = 12.5^o to 11.06^o). These files are in US standard units (inches) and to scale with a tolerance of &plusmn; 0.001 inch.   

An Excel [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Bundle-Support-4-2021.xlsx spreadsheet] has been created to calculate the location of the bundle supports' mounting rods with respect to the focal plane coordinate system. This spreadsheet also calculates the length of the parallel railing end supports which need to be fabricated anew for each unique TAGM location on the focal plane. One last, but very important thing that the spreadsheet calculates is the shim size needed, during TAGM realignment, in order to achieve the proper tow angle between bundle supports during mounting. In addition to the spreadsheet, an AutoCAD [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Parallel_Railing_Parts.dwg drawing] used to design the three parallel rail components needed for each unique tagging energy spectrum starting position of the TAGM and a [https://zeus.phys.uconn.edu/halld/tagger/TAGM-4-2021/Beta-Angle12_5-to-11_06deg_modified.dwg drawing] for the current setup (&beta; = 12.5^o to 11.06^o). These files are in US standard units (inches) and to scale with a tolerance of &plusmn; 0.001 inch.   

 

==Calculating Position of Each Bundle Support Mounting Rod==

==Calculating Position of Each Bundle Support Mounting Rod==