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David Rodríguez Piñeiro GSI Darmstadt PANDA Collaboration Meeting GSI 11. 12. 2008

David Rodríguez Piñeiro GSI Darmstadt PANDA Collaboration Meeting GSI 11. 12. 2008. PANDA Collaboration Meeting Backward Endcap Calorimeter Tapered Cr ystals: (Off-Point 3000 and Off-Point 794 Geometries). Backward Endcap EMC. 1.– Requirements - Boundary Conditions - Dimensions

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David Rodríguez Piñeiro GSI Darmstadt PANDA Collaboration Meeting GSI 11. 12. 2008

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  1. David Rodríguez PiñeiroGSI DarmstadtPANDA Collaboration MeetingGSI11. 12. 2008 PANDA Collaboration Meeting Backward Endcap Calorimeter Tapered Crystals: (Off-Point 3000 and Off-Point 794 Geometries)

  2. Backward Endcap EMC 1.– Requirements - Boundary Conditions - Dimensions - Alveoles 2.– Off-Point 3000 Geometry - Distance to the target - Inner Radius - Beam Cone Angle - Wedge Hollow - 150 mm Crystals 3.– Off-Point 794 Geometry - Distance to the target - Inner Radius - 150 mm Crystals 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  3. Backward Endcap EMC Boundary Conditions 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  4. Backward Endcap EMC 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary Dimensions (I) David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  5. Backward Endcap EMC Dimensions (II) 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  6. Backward Endcap EMC Dimensions (III) 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  7. Backward Endcap EMC Alveoles (I) 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  8. Backward Endcap EMC Alveoles (II) 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  9. Backward Endcap EMC Alveoles (III) 1.– Requirements - Boundary Conditions - Dimensions (I) - Dimensions (II) - Dimensions (III) - Alveoles (I) - Alveoles (II) - Alveoles (III) 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary Minimum distance between alveoles: 0,75 mm David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  10. Backward Endcap EMC 2.– Off-Point 3000 Geometry David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  11. Backward Endcap EMC Distance to the target (I) • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary Distance from target to crystals 594 mm (560 mm free space) Limit angle of the barrel is 39º Maximum angle outer crystal BW endcap 29,948º So, we would need to shift the BW endcap forwards, leaving a free space of 387,94 mm David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  12. Backward Endcap EMC Distance to the target (II) • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary 30% Closer to the Target (free distance 530,783 mm) Maximum angle outer crystal BW endcap 31,41º David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  13. David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  14. Backward Endcap EMC Inner Radius • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary 30% less free space of Inner Radius, 119 mm 64 crystals gain David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  15. Backward Endcap EMC Beam Cone Angle • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary Angle trompet: 15,85º < 17,44º (30% closer and smaller) David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  16. Backward Endcap EMC Wedge Hollow (I) • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary 200 mm length Wedge hollow of 20º Two pieces 352 crystals left 96 less David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  17. Backward Endcap EMC Wedge Hollow (II) • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary 408 crystals left 40 less Same Free area than Wedge 20º David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  18. Backward Endcap EMC 150 mm Crystals • 1.– Initial Data • 2.– Off-Point 3000 Geometry • Distance to the target (I) • - Distance to the target (II) • - Inner Radius • - Beam Cone Angle • - Wedge Hollow (I) • Wedge Hollow (II) • - 150 mm Crystals • 3.– Off-Point 794 Geometry • 4.- Summary No gain 150 mm * Back face of the crystals: 25,594x25,594 David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  19. Backward Endcap EMC 3.– Off-Point 794 Geometry David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  20. Backward Endcap EMC Distance to the target 1.– Initial Data 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry - Distance to the target - Inner Radius - 150 mm Crystals 4.- Summary Now maximum angle is 25,978º (before 29,948º) The gap is bigger 30% Closer to the Target (free distance: 510,483 mm) 368 crystals (before 448) David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  21. Backward Endcap EMC David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  22. Backward Endcap EMC Inner Radius 1.– Initial Data 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry - Distance to the target - Inner Radius - 150 mm Crystals 4.- Summary 30% less free space of Inner Radius, 118 mm 72 crystals gain David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  23. Backward Endcap EMC 150 mm Crystals 1.– Initial Data 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry - Distance to the target - Inner Radius - 150 mm Crystals 4.- Summary Gain 16 crystals * Back face of the crystals: 24,686x24,686 David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  24. Backward Endcap EMC Summary 1.– Initial Data 2.– Off-Point 3000 Geometry 3.– Off-Point 794 Geometry 4.- Summary Distance target: from 560 to 530,783 mm from 560 to 510,483 mm Inner Radius: from 150 to 119 mm from 150 to 118 mm Angle trompet:15,85º < 17,44º (30% closer and smaller) Solid Angle David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

  25. Backward Endcap EMC Thanks Personal Contact: d.rodriguezpineiro@gsi.de Tel: +49 (0) 6159171/1321 www.gsi.de David Rodríguez Piñeiro - GSI Darmstadt - Collaboration Meeting

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