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Line 141: − + − + − <li>Using β<sub>1</sub> calculate the X-displacement along the focal plane (ΔX) from the center of the first fiber column to the center of the sixth fiber column of the first bundle support</li> − + − + − <li>Repeat the above two steps until the bundle support angle β (e.g. average between β<sub>1</sub> & β<sub>6</sub>) does not change</li> + + + + + + + + + +
Moving the Tagger Microscope (view source)
Revision as of 03:20, 30 March 2021
, 03:20, 30 March 2021→Calculating Position of Each Bundle Support Mounting Rod
A summary of the spreadsheet calculations is a follows:
A summary of the spreadsheet calculations is a follows:
<ul>
<ul>
<li>First select a starting energy (highest γ energy to tag)</li>
<li>Select a starting energy for the photon tagging array (highest γ energy to tag)</li>
<li>Using [https://halldweb.jlab.org/wiki/images/b/b6/Counterbounds2017%28b%29.xlsx hodoscope energy bin bounds] interpolate the crossing angle with respect to the focal plane (β) of electrons at the center of the exposed end of the first (starting E<sub>γ</sub>) SciFi fiber column (β<sub>1</sub>) and the corresponding location on the focal plane (X<sub>1</sub>)</li>
<li>Using [https://halldweb.jlab.org/wiki/images/b/b6/Counterbounds2017%28b%29.xlsx hodoscope energy bin bounds] interpolate the crossing angle with respect to the focal plane (β<sub>1</sub>) of an electron associated the highest energy to be tagged (starting E<sub>γ</sub>)</li>
<ul>
<ul>
<li>Add ΔX to X<sub>1</sub> to get X<sub>6</sub>, then interpolate the value of β<sub>6</sub></li>
<li> Interpolate the location on the X<sub>FP</sub> axis at which this electron crosses (X<sub>1</sub>)</li>
<li>Using the average value of β<sub>1</sub> and β<sub>6</sub>, recalculate the X<sub>FP</sub> displacement (Δx) from the center of the first to sixth fiber column using the new β<sub>avg.</sub></li>
<li> These electrons will pass through the center of the first column of SciFi fibers</li>
</ul>
</ul>
<li>Using β<sub>1</sub> calculate the X-displacement along the focal plane (Δx) from the center of the first fiber column to the center of the sixth fiber column of the first bundle support</li>
<ul>
<li>Add Δx and X<sub>1</sub> to get X<sub>6</sub>, then interpolate the value of β<sub>6</sub></li>
<li>Using the average value of β<sub>1</sub> and β<sub>6</sub> (β<sub>avg.</sub>), recalculate the X<sub>FP</sub> displacement (Δx) from the center of the first to sixth fiber column (X<sub>6</sub>)</li>
<li>Repeat the above two steps until the bundle support angle β (e.g. average between β<sub>1</sub> & β<sub>6</sub>) does not change appreciably</li>
</ul>
[[Image:Bundle_support_displacementjpg|center|thumb|400px|Figure : Sketch showing the X-displacement along the focal plane (Δx) from the center of the first fiber column to the center of the sixth fiber column of the first bundle support.]]
<li></li>
<li></li>
<li></li>
<li></li>