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QM2 Analysys

QM2 Analysys. Perugia Group. Beam Profile. Selected Beam region X [-1.5, -0.35] mm. Selected Beam region Y [10, 11.5] mm. Volume Reflection vs X. VR angle almost flat vs X in the range [-1.5, -0.8] mm  VR  11.7+/-0.2  rad

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QM2 Analysys

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  1. QM2 Analysys Perugia Group

  2. Beam Profile Selected Beam region X [-1.5, -0.35] mm Selected Beam region Y [10, 11.5] mm

  3. Volume Reflection vs X VR angle almost flat vs X in the range [-1.5, -0.8] mm VR 11.7+/-0.2 rad Slope of 1.8 rad/mm in the range [-0.8, 0.35] mm VR [11.7 , 12.6] rad

  4. Volume Reflection vs Y Xrange [-1.5, -0.8] Xrange [-0.8, -0.35] VR angle almost flat vs Y in the X range [-1.5, -0.8] mm VR 11.7+ 0.2-0.1rad VR angle almost flat vs Y in the X range [-0.8, -0.35] mm VR 12.0+ 0.2-0.1rad

  5. VR Efficiency Efficienza X range [-1.5, -0.80] = 98.27 +/- 0.04 Efficienza X range [-0.8, -0.35] = 98.75 +/- 0.04 Efficienza X range [-1.5, -0.35] = 98.31 +/- 0.04

  6. Channelling vs Y Efficiency 51.9 +/- 1.6 % Channelling angle at maximum efficiency = 68.6 +/- 0.2 rad

  7. Crystal torsion Vs Y Position of max channelling has a linear dependence on the vertical coordinate which can be interpreted as a crystal torsion The slope is 3.3 rad/mm

  8. Channeling Efficiency and linearity The relation between the channelling angle (distance of the left peak from a reference point) and the crystal orientation angle is linear with a slope of 1.09. The fact that the slope differs from 1 can arise from the goniomiter calibration accuracy. Max channelling orientation is obtained from a gaussian fit to the Channeeling efficiency as function of the crystal angle. The different curves correspond to different Y slices

  9. Channelling vs X Analysis done on a 0.5 mm slice on Y [11,11.5] mm to disentangle the torsion effect Efficiency = 51.6 +/- 1.3 % Channelling angleCH = 68.8 +0.6-0.8 rad

  10. Channelling vs X (2) Analysis done on a 0.5 mm slice on Y [11,11.5] mm to disentangle the torsion effect Orientation of max channelling seems not depending on X

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