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Lumical. R&D progress report. Ronen Ingbir. Lumical - A F uture L inear C ollider detector. HEP Tel Aviv University. Outline. Prague follow up. 1.Phi bias 2. Delta theta 3. Real life approach 4. New selection mechanism. Luminosity study Future steps. Dense design.

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## HEP Tel Aviv University

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**Lumical**R&D progress report Ronen Ingbir Lumical - A Future Linear Collider detector HEP Tel Aviv University**Outline**Prague follow up 1.Phi bias 2. Delta theta 3. Real life approach 4. New selection mechanism Luminosity study Future steps Dense design 1. Moliere radius 2. Radiation length 3. Detector properties 4. Design optimization 1. Margins design properties 2. Events close to margins 3. Maximum pick shower design 4. Remarks Design variations Lumical - A Future Linear Collider detector HEP Tel Aviv University**Fixed non zero bias under investigation.**Azimuthal reconstruction Events Num. 250 GeV E weight. Log. weight. Constant value Constant value Lumical - A Future Linear Collider detector HEP Tel Aviv University**Two plots convinced us that the bias observed is not**detector design dependent nor imperfect algorithm. Y (cm) 48 sectors design X (cm) Lumical - A Future Linear Collider detector HEP Tel Aviv University**Magnetic field**Lumical - A Future Linear Collider detector HEP Tel Aviv University**Log. weight.**E weight. Polar reconstruction 400 GeV Constant value Constant value Lumical - A Future Linear Collider detector HEP Tel Aviv University**Bias study**‘Pure’ electrons simulation Bhabha+Beam+BS(5e-4) Lumical - A Future Linear Collider detector HEP Tel Aviv University**Real life algorithm**Working with both sides of the detector and looking at the difference between the reconstructed properties: (In real life we don’t have generated properties) Lumical - A Future Linear Collider detector HEP Tel Aviv University**Polar resolution**Lumical - A Future Linear Collider detector HEP Tel Aviv University**Energy resolution**Lumical - A Future Linear Collider detector HEP Tel Aviv University**33 mrad**Events selection Energy Resolution The most significant event selection cut is the geometric acceptance cut. This cut was used to get the best energy, angular resolutions and minimum biases. Lumical - A Future Linear Collider detector HEP Tel Aviv University**Eout - Ein**P= Eout + Ein New selection cut Out Signal Ring In Lumical - A Future Linear Collider detector HEP Tel Aviv University**Eout-Ein**P= Eout+Ein Out In Lumical - A Future Linear Collider detector HEP Tel Aviv University**Eout-Ein**P= Eout+Ein 3 cylinders 3 Rings 2 cylinders 3 Rings 1 cylinders 3 Rings Outline Lumical - A Future Linear Collider detector HEP Tel Aviv University**Dense design**15 cylinders * 24 sectors * 30 rings = 10800 cells 8 cm R L 6.1 m 28 cm 20 cm 20 cm 0.1 cm Silicon 0.55 cm Tungsten 0.31 cm Silicon 0.34 cm Tungsten Lumical - A Future Linear Collider detector HEP Tel Aviv University**Basic properties**? Lumical - A Future Linear Collider detector HEP Tel Aviv University**0.8cm**1.1cm Moliere radius Detector Signal X (cm) Lumical - A Future Linear Collider detector HEP Tel Aviv University**Radiation length**Detector Signal Z (cm) 30 radiation length detector 47 radiation length detector Lumical - A Future Linear Collider detector HEP Tel Aviv University**Optimization**Lumical - A Future Linear Collider detector HEP Tel Aviv University**Polar resolution & bias**16 cylinders 40 rings 15 cylinders 30 rings Lumical - A Future Linear Collider detector HEP Tel Aviv University**Energy resolution**16 cylinders 40 rings 15 cylinders 30 rings Lumical - A Future Linear Collider detector HEP Tel Aviv University**New geometric acceptance**Events Energy Resolution Lumical - A Future Linear Collider detector HEP Tel Aviv University**Optimization**Lumical - A Future Linear Collider detector HEP Tel Aviv University**Optimization**Outline Lumical - A Future Linear Collider detector HEP Tel Aviv University**Margins around cells**Having margins Means Losing Information Lumical - A Future Linear Collider detector HEP Tel Aviv University**One cylinder**One sector Loosing information Detector signal Detector signal (deg) Radius (cm) Lumical - A Future Linear Collider detector HEP Tel Aviv University**Energy resolution**Lumical - A Future Linear Collider detector HEP Tel Aviv University**Polar resolution**Lumical - A Future Linear Collider detector HEP Tel Aviv University**4 rings**15 rings 11 rings 30 rings 15 cylinders 10 cylinders 20 cylinders 10cylinders 24 sectors * 15 rings * (10 cylinders + 20 cylinders) = 10,800 channels Maximum pick shower design Our basic detector is designed with 30 rings * 24 sectors * 15 cylinders = 10,800 channels Do we use these channels in the most effective way ? Lumical - A Future Linear Collider detector HEP Tel Aviv University**0.13e-3 rad**0.11e-3 rad Polar reconstruction Maximum pick shower design Basic Design Constant value Angular resolution improvement without changing the number of channels Other properties remain the same Constant value Lumical - A Future Linear Collider detector HEP Tel Aviv University**Remarks**• Options to minimize the margin effect: • Rings rotation. • 2. Different cylinders segmentation Maximum pick shower design can enable us to reduce the number of channels while maintaining properties or to improve properties while kipping the same number of channels. Outline Lumical - A Future Linear Collider detector HEP Tel Aviv University**‘Real physics’ MC**Bhabha + Beamstrahlung + Beamspread High statistics MC for required precision R&D status & future steps Pure electron MC Detector properties Events selection ‘Real physics’ MC + digitization noise + New max pick design + Margins Final optimization Lumical - A Future Linear Collider detector HEP Tel Aviv University**THE END**Lumical - A Future Linear Collider detector HEP Tel Aviv University

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