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SSD geometry updates (for Y2014)

Updated on Fri, 2014-01-24 12:39. Originally created by bouchet on 2013-12-14 11:52.
 Update to SisdGeo7.xml, based on the solidWorks model
  1. tilt angle for all ladders set to -7degrees
  2. angle between ladders is 18 degrees, fixed. The previous version had some fluctuations around 18degrees : the reason was because it supposed that the ladders were still on the 4 differents shells. Now the SSD has a shape of a circle (placed on the OSC), not an ellipsoid anymore.
  3. ladder 1 starts at 1:00pm, meaning y=22.03 cm and X=3.56cm

old parameters : SFPA, version 6
 <Fill name="SFPA" comment="Silicon Strip detector parameters"  >
            <var name="version" value="6" comment=" geometry version " />
            <var name="ladderMap" value="{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}" comment=" presence of ladders " />
            <var name="ladderAngle" value="{99.0,117.3,135.6,153.4,171.2,189.0,206.8,224.6,242.4,260.7,279.0,297.3,315.6,333.4,351.2,9.0,26.8,44.6,62.4,80.2}" comment=" individual angles " />
            <var name="ladderTilt" value="{-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0,-12.0}" comment=" individual tilts " />
            <var name="ladderRadius" value="{22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3}" comment=" individual radii " />
        </Fill>
Fig 1 : Y vs. X of SSD hits ; ladder 1 is represented in red



new parameters : SFPA version 7
           <Fill name="SFPA" comment="Silicon Strip detector parameters"  >
            <var name="version" value="7" comment=" geometry version " />
            <var name="ladderMap" value="{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}" comment=" presence of ladders " />
            <var name="ladderAngle" value="{81.0,99.0,117.0,135.0,153.0,171.0,189.0,207.0,225.0,243.0,261.0,279.0,297.0,315,333,351,9.0,27.0,45.0,63.0}" comment=" individual angles " />
            <var name="ladderTilt" value="{-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0,-7.0}" comment=" individual tilts " />
            <var name="ladderRadius" value="{22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3,22.3}" comment=" individual radii " />
            </Fill>
Fig 2 : Y vs. X of SSD hits ; ladder 1 is represented in red (new config)



Fig 3 : comparison of the tilt angles between old and new configurations





 




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