1 / 21

Dipanwita Dutta

Dipanwita Dutta. Much Segmentation Study: A Flexible Scheme. Outline. Existing Segmentation Scheme (5% Occupancy) Flexible Segmentation Scheme Aim Plan Implementation Examples Improve coverage near beam pipe Hit Production Summary and Future Plan. Muon Simulations.

vondra
Download Presentation

Dipanwita Dutta

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dipanwita Dutta Much Segmentation Study: A Flexible Scheme 13th CBM Collaboration Meeting

  2. Outline • Existing Segmentation Scheme (5% Occupancy) • Flexible Segmentation Scheme • Aim • Plan • Implementation • Examples • Improve coverage near beam pipe • Hit Production • Summary and Future Plan 13th CBM Collaboration Meeting

  3. Muon Simulations • cbmroot release v.APR08 • UrQMD central events Au+Au at 25 AGeV • all strips STS • compact MuCh 5 iron absorber (125cm) 15 MuCh stations • MuCh hit producer without clusters • L1 (STS) and LiT (MuCh) tracking 13th CBM Collaboration Meeting

  4. Existing Segmentation Scheme 5% Hit occupancy Central Au+Au Collision @ 25 AGeV from UrQMD Compact Much Min Pad size 1.4 × 2.8 mm2 13th CBM Collaboration Meeting

  5. Existing Scheme: Sector and Pad Dimensions 13th CBM Collaboration Meeting

  6. Existing Segmentation scheme Station 1 Min Pad dimension: 1.4×2.8 mm2 – unrealistic 6 regions, 1, 2, 3, 4, 5, 6 Rad: 13.7,20,28,36,44,52,62.3 1. Based on 5% Occupancy : governed by Hit Density 2. Define 9 Regions of different Sector sizes 3. Sector as well as pad dim. doubled seq. 4. Each Sector is having 128 channels 5.Start region number for each Station Triplet depends on the hit density 6. The radius vector of different regions is defined from HDensity histogram 13th CBM Collaboration Meeting

  7. Hit Production Efficiency ● MC Points ●Reco Hits Less Efficiency Less coverage near beam pipe Hit prod. Efficiency= N hits/N Mc. points 13th CBM Collaboration Meeting

  8. Aim: Flexible Segmentation Scheme To study the realistic detector designby optimising pad layout To make the detector design simple To have flexibility of sector sizes and pad sizes To get more coverage near the pipe 13th CBM Collaboration Meeting

  9. Plan: Flexible Segmentation Scheme Steps: 1. Keep 9 Regions of Diff. Sector sizes 2. Make Flexible Radius for Diff. Regions 3.Flexible No. of Regions 4. Flexible Pad Dimension 5. Flexible Number of Channels 6. Improve coverage near beam pipe 13th CBM Collaboration Meeting

  10. Implementation: Flexible Seg. Scheme • Introduced Option for Different Scheme (1) Option 0: Original Segmentation Scheme 5% Occupancy (2) Option 1:Flexible Segmentation Scheme(Dec08 Release) • Flexible radius of regions • Flexible no. of regions • Improved coverage near beam pipe • (3) Option 2:Flexible Segmentation Scheme(Recent) • Option of variable Channel No. (1→128) • Option of variable pad dimension 13th CBM Collaboration Meeting

  11. Example: Flexible Seg. Scheme (Option1 ) R_int=26.2 cm R_ext=124.5 cm • Station: 10,11,12 (after 4th absorber) Existing: Rad .of diff. regions (8,9) 42 cm Flexible: Rad .of diff. regions (2,8,9) Rad [ ]={27,42} //cm Reg [ ]={2,8,9} 13th CBM Collaboration Meeting

  12. Example: Flexible Seg. Scheme (Option 1) ● MC Points ●Reconstructed Hits Station: 10,11,12 (after 4th absorber) 13th CBM Collaboration Meeting

  13. Improved Coverage: Flexible Seg Scheme Allow Sectors inside the Beam Pipe • To remove the efficiency loss due to less coverage near the beam pipe • Implemented for optimization of pad size 13th CBM Collaboration Meeting

  14. Hit Prod. Efficiency with Flexible Seg. Scheme ( Improved coverage) Std. Seg. Hit Prod. Eff: ~90% Improved coverage: Hit Prod. Eff. ~98% Efficiency Improved – by improving the coverage DEC08 Release 13th CBM Collaboration Meeting

  15. Flexible Segmentation Scheme (Option 2) Additional Feature: Flexible No. of Channel and Flexible pad dimension MinPadW =1.38mm MinPadL =2.77mm minPadWand minPadL and No. of Channel is input 13th CBM Collaboration Meeting

  16. Example: Flexible Seg. Scheme ( Option 2) Stations : 1, 2, 3 Reg: 3,4,5 Rad: 25,45 r_int=13.7, r_ext=62.3 cm Blue:Reg. 3, Pad: 2.77 × 5.54 mm2Yellow:Reg. 4, Pad: 5.54 × 5.54 mm2Magenta: Reg. 5, Pad: 5.54 × 10.08 mm2 No. of channel/sec: 32 No. of channel/sec: 128 No. of channel/sec: 64 Sec. (3): 2.21×2.21 cm2 (4): 2.21×4.43 cm2 (5): 4.43×4.43 cm2No. of sec: 1196 No. of channels : 38272 Sec. (3): 4.43×4.43 cm2 (4): 4.43×8.87 cm2 (5): 8.87×8.87 cm2 No. of sec: 320 No. of channels: 40960 Sec. (3): 2.21×4.43 cm2 (4): 4.43×4.43 cm2 (5): 4.43×8.87 cm2No. of sec: 628 No. of channels: 40192 13th CBM Collaboration Meeting

  17. Example: Flexible Seg. Scheme ( Option 2) Blue:Reg. 3, Pad: 2.77 × 5.54 mm2Yellow: Reg. 4, Pad: 5.54 × 5.54 mm2Magenta: Reg. 5, Pad: 5.54 × 10.08 mm2 Stations : 4, 5, 6 Reg: 3,4,5 Rad: 25, 45 No. of channel/sec: 4 No. of channel/sec: 16 No. of channel/sec: 8 Sec. (3): 1.11×2.21 cm2 (4): 2.21×2.21 cm2 (5): 2.21×4.43 cm2 No. of sec: 2316 No. of channels: 37056 Sec. (3): 0.55×1.11 cm2 (4): 1.11×1.11 cm2 (5): 1.11×2.21 cm2 No. of sec: 9060 No. of channels : 36240 Sec. (3):1.11×1.11 cm2 (4):1.11×2.21 cm2 (5): 2.21×2.21 cm2 No. of sec: 4580 No. of channels: 36640 13th CBM Collaboration Meeting

  18. Study of Hit Prod. Efficiency for different digi scheme 12345 22345 32345 34556 34567 42345 S/B and Efficiency study required to optimize pad dimension 13th CBM Collaboration Meeting

  19. 2.8×5.5 mm2 5.5×5.5 mm2 5.5×11.1 mm2 5.5×11.1 mm2 11.1×11.1 mm2 Hit Production Efficiency Stat/per event: Mc. Points:2990 Rc. Hits :2941 Multihits :47 Outside :0.97 Min pad size: 2.8×5.6 mm2 6 times larger and Realistic 34556 seems to be the Mimimum Pad dimensions in stations from Hit Efficiency 13th CBM Collaboration Meeting

  20. Summary • A Flexible Segmentation scheme for Much implemented • Flexibility in radius of different region • Flexibility in number of regions • Flexibility in No. of Channels • Flexibility in pad dimension • Improved coverage near beam pipe • Min. pad dimension 2.8×5.6 mm2shows good Hit efficiency (3 times larger and realistic pad dimension) • Flexible Segmentation works with hit production and upto reconstruction 13th CBM Collaboration Meeting

  21. Future Plan • Study the realistic digitization with Clustering and Avalanche • Optimisation of detector layout for quarkonium *Thanks for input from A. Kiseleva for this study Thank you 13th CBM Collaboration Meeting

More Related