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Realistic detector layout for MUCH system

This document outlines the proposed realistic detector layout for the MuCh (Muon Chamber) system presented by Mikhail Ryzhinskiy during the CBM Collaboration Meeting held in Dresden from September 25-28, 2007. Key topics covered include the goals of achieving optimal parameters, addressing the hit density challenge, and strategies for segmentation. The advantages and disadvantages of various designs, including hybrid stations and implementation of strip-like pads, are discussed. Future improvements and steps required for effective simulation and digitization processes are also highlighted.

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Realistic detector layout for MUCH system

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  1. Realistic detector layout for MUCH system M.Ryzhinskiy, SPbSPU CBM Collaboration Meeting September 25-28, 2007, Dresden, Germany

  2. Topics to cover • Goals & problems • Proposed solutions • Future improvements • Summary CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  3. dx dx=dy=100µ dy Goals • Ideal case: • More realistic case needed: optimal parameters (channel number, granularity, …); ability to work in CBM exp.; consensus between the price and functionality. CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  4. Hit density (HD) challenge HDmax 0.8 hits/(event*cm2) HD(R1) = HDmax/2; HD(R2) = HD(R1)/2; ….. HD(Rn) = HD(Rn-1)/2. CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  5. R1 R2 …….. Rn Circled regions occupancy  0.05 CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  6. Segmentation Station  Sectors  Pads 128 channels/sector PADmin: 0.14x0.28 cm2  SECTORmin: 2.24x2.24 cm2 Sipad/sec=2*Si-1pad/sec CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  7. Hit distribution CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  8. Terminology Stations Layer LayerStation Sector Pad CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  9. Disadvantages & possible solution • Strip-like pads (strips): width = 0.14 cm = const lengthi =2*lengthi-1 • Hybrid stations: pads in central region + strips in peripheral region  9 stations CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  10. Simple hit producer (pads) Event display by E. Kryshen CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  11. Avalanches CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  12. primary electrons sec. electrons Advanced algorithm CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  13. Running a segmentation CbmMuchSegmentation* muchSegmentation = new CbmMuchSegmentation(); // Set number of layers muchSegmentation->SetNLayers(5); // Set filename where to store parameters muchSegmentation->SetDigiFileName(“much.digi.par”); // Set minimal resolution for a detector layer muchSegmentation->SetMinSigmaX(1, 400); muchSegmentation->SetMinSigmaY(1, 800); // Set rotation angle muchSegmentation->SetAngle(1, 10); // Make segmentation muchSegmentation->SegmentMuch(); CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  14. Running the digitizer // --- MuCh digitizer ---------------------------------------- CbmMuchDigitize* muchDigitize = new CbmMuchDigitize("MuchDigitize", iVerbose); muchDigitize->SetUseAvalanche(0); // Not account for avalanches muchDigitize->SetDTime(8e-2); // Set time resolution fRun->AddTask(muchDigitize); // ------------------------------------------------------------ // --- MuCh hit finder --------------------------------------- CbmMuchFindHits* muchFindHits = new CbmMuchFindHits("MuchFindHits", iVerbose); fRun->AddTask(muchFindHits); // ------------------------------------------------------------ CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  15. Next steps • Fix parameters (resolution, angles …) • Consider strip-like pads (if needed) • Segmentation to the simulation stage • Cluster finder CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

  16. Summary • Segmentation procedure is provided • Simple digitizer for MuCh is provided • Proposed different segmentations • Advanced digitizer is developed • Compatibility with new CBMROOT release CBM Collaboration Meeting, 25-28 September, 2007 Mikhail Ryzhinskiy

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