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Study of Segmentation Scheme

Y.P.Viyogi(VECC) Arun Prakash(BHU). Study of Segmentation Scheme. Outline. Geometry : for SIS100 case Manual Segmentation Hit producer Reconstruction Results Next Step. Geometry. Transport:1000 UrQMD mbias @8A.GeV+1000 Omega Geometry: Compact +Modular+32cmX32cm GEM sts_same_z.geo

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Study of Segmentation Scheme

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  1. Y.P.Viyogi(VECC) Arun Prakash(BHU) Study of Segmentation Scheme

  2. Outline • Geometry : for SIS100 case • Manual Segmentation • Hit producer • Reconstruction • Results • Next Step

  3. Geometry Transport:1000 UrQMD mbias @8A.GeV+1000 Omega Geometry: Compact +Modular+32cmX32cm GEM sts_same_z.geo pipe_much.geo shied_standard.geo cave.geo target_au_250mu.geo magnet_standard.geo

  4. Input File For Segmentation Number of stations : 5 # Station specification Number of channels : 1024 1024 256 256 256 Number of regions : 2 2 1 1 1 # Station 1 Region radii [cm] : 25 70 Pad width [cm] : 0.5 1.0 Pad length [cm] : 0.5 1.0 # Station 2 Region radii [cm] : 40 96 Pad width [cm] : 0.5 1.0 Pad length [cm] : 0.5 1.0 # Station 3 Region radii [cm] : 120 Pad width [cm] : 2.0 Pad length [cm] : 2.0 # Station 4 Region radii [cm] : 150 Pad width [cm] : 2.0 Pad length [cm] : 2.0 # Station 5 Region radii [cm] : 182.5 Pad width [cm] : 2.0 Pad length [cm] : 2.0

  5. segmentation station-3 station-1 station-2 station-4 station-5 pads~528k

  6. Hits Simple Gem

  7. Qa Simple Gem Stats. All tracks: ; 86079; 24238; 8457; 2301; 624; ------------;--------------------------------------------- Primary: ; 13528; 3805; 1468; 594; 273; Secondary: ; 72551; 20433; 6989; 1707; 351; ---------------------------------------------------------- Protons: ; 21476; 8094; 2643; 530; 72; Pions: ; 16619; 4446; 1244; 175; 26; Electrons: ; 44995; 9799; 3293; 925; 203; Muons: ; 1980; 1478; 1099; 626; 315; Kaons: ; 1000; 418; 177; 45; 8; =================================== StatisticsQa: Total number of points: 340828 Points overcounted: 0 Points undercounted: 2620 Signal points: 10317 Signal hits: 10317

  8. Hits Advanced GEM Occupancy increases in advanced GEM by factor of~3 compared to Simple GEM. CONSEQUENCES FOR DETECTOR FABRICATION

  9. Cluster Statistics

  10. Qa Advanced GEM Stats. =================================== OccupancyQa: =================================== DigitizerQa: All tracks: ; 86079; 24238; 8457; 2301; 624; ------------;--------------------------------------------- Primary: ; 13528; 3805; 1468; 594; 273; Secondary: ; 72551; 20433; 6989; 1707; 351; ---------------------------------------------------------- Protons: ; 21476; 8094; 2643; 530; 72; Pions: ; 16619; 4446; 1244; 175; 26; Electrons: ; 44995; 9799; 3293; 925; 203; Muons: ; 1980; 1478; 1099; 626; 315; Kaons: ; 1000; 418; 177; 45; 8; =================================== StatisticsQa: Total number of points: 334911 Points overcounted: 0 Points undercounted: 24652 Signal points: 10317 Signal hits: 10293 At this level simple gem is comparable to advanced gem

  11. Reconstruction:CbmMuchMatchTracks Simple Gem Advanced GEM True Hits 72 % 157% Wrong Hits 28 % -57% We dont understand this !!Mail sent to Misha Otherwise reconstruction is comparable for all particles

  12. New Geometry Transport:25UrQMD central @25GeV Geometry: new +Modular+32cmX32cm GEM sts_same_z.geo pipe_much.geo shied_standard.geo cave.geo target_au_250mu.geo magnet_standard.geo

  13. # General information MuchCave Zin position [cm] : 105 Acceptance tangent min : 0.1 Acceptance tangent max : 0.5 Number of absorbers : 8 Number of stations : 8 # Absorber specification Absorber Zin position [cm] :0 25 50 75 100 125 150 175 Absorber thickness [cm] :15 15 15 15 15 15 15 15 Absorber material : I I I I I I I I # Station specification Station Zceneter [cm] :20 45 70 95 120 145 170 195 Number of layers : 1 1 1 1 1 1 1 1 Detector type : 1 1 1 1 1 1 1 1 Distance between layers [cm]: 10 10 10 10 10 10 10 10 Support thickness [cm] : 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Use module design (0/1) : 1 1 1 1 1 1 1 1 # GEM module specification (type 1) Active volume lx [cm] : 32.0 Active volume ly [cm] : 32.0 Active volume lz [cm] : 0.3 Spacer lx [cm] : 0.5 Spacer ly [cm] : 5 Overlap along y axis [cm] : 2

  14. Occupancy 8station

  15. Occupancy-compact

  16. Qa Compact ----------------------QA compact muon ------------------ All tracks: ; 15257; 4029; 1395; 287; 63; ------------;--------------------------------------------- Primary: ; 2122; 589; 161; 24; 5; Secondary: ; 13135; 3440; 1234; 263; 58; ---------------------------------------------------------- Protons: ; 2219; 915; 319; 72; 11; Pions: ; 3375; 1115; 351; 45; 10; Electrons: ; 9186; 1701; 571; 103; 13; Muons: ; 190; 155; 85; 49; 26; Kaons: ; 286; 142; 69; 18; 3; =================================== StatisticsQa: Total number of points: 57208 Points overcounted: 0

  17. Qa 8 Station ------------------ QA 8 staions ----------------- All tracks: ; 23970; 7520; 3354; 1458; 757; 327; 186; 105; ------------;------------------------------------------------------------------------ Primary: ; 3116; 1058; 353; 129; 46; 25; 18; 8; Secondary: ; 20854; 6462; 3001; 1329; 711; 302; 168; 97; ------------------------------------------------------------------------------------- Protons: ; 2944; 1580; 809; 366; 157; 67; 41; 24; Pions: ; 4941; 2004; 846; 339; 148; 52; 33; 21; Electrons: ; 15528; 3573; 1483; 610; 353; 134; 57; 22; Muons: ; 191; 145; 115; 89; 72; 57; 42; 31; Kaons: ; 365; 215; 101; 54; 27; 17; 13; 7; =================================== StatisticsQa: Total number of points: 38116 Points overcounted: 0 Points undercounted: 1853 Signal points: 0 Signal hits: 0

  18. Next Steps....... • Further optimize pad sizes for compact & modified geometry • Do the reconstruction for modified geometry • Higher statistics Reco run and estimation of Signal/Background for omega in 8AGeV case

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