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SRC Weekly Meeting June 26, 2012

In the June 26, 2012 weekly meeting, we revisited the optics calibration for the Left High-Resolution Spectrometer (LHRS), focusing on the need to recalibrate the Phi variable, which impacts the target Y calculation. Adjustments were discussed regarding Sieve X and Y reconstruction, alongside the significance of the scale effect on vertex Z. Notably, results from runs 1229, 1231, and 1243 highlighted full acceptance with similar ideal means. A detailed summary of optics parameters, including Phi, Theta, and momentum settings, was presented.

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SRC Weekly Meeting June 26, 2012

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  1. SRC Weekly MeetingJune 26, 2012 Revisit Optics forLHRS,

  2. LEFT Optics Re-Calibration of phi

  3. Sieve X & Y Reconstruction  Recalibration of Φ is needed

  4. With scale Effect on the vertex Z, the change is made to target_Y calculation. This effect only the phi variable as the Sieve Y defined as: • Ysieve = L*phitg + Ytg Sieve X Y before calibration

  5. BEFORE Note: offset in Sieve Y is to the right of the red lines

  6. Sieve X Y, per foilbefore calibration Run 1238 C12- 13foils At 16.5 degree

  7. Run 1238 C12- 13foils At 16.5 degree Sieve In Sieve X Y after calibration

  8. Sieve X Y, per foilafter calibration Run 1238 C12- 13foils At 16.5 degree

  9. Dp scan on Hydrogen

  10. Hydrogen scan. Redline is the momentum setting of the Dipole.

  11. Hydrogen scan. Redline is the momentum setting of the Dipole. Focus on the run 1229, 1231, and 1243 where we have full acceptance, the ideal-mean is approximately the same

  12. Left HRS optics summary Phi & Theta • Vertex • Phi • Theta • Momentum (half done) vertex

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