RICH Upgrade Simulation with RICH 1 RICH Upgrade

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RICH Upgrade Simulation with RICH 1 RICH Upgrade Review S. Easo 4 -4 -2013

RICH Upgrade Simulation with RICH 1 RICH Upgrade Review S. Easo 4 -4 -2013 1

Outline • Detector options and performance criteria • Software and detector configurations used for

Outline • Detector options and performance criteria • Software and detector configurations used for simulation • Results from simulation performance studies • Summary 2

Detector Options and Performance Criteria Ø Current Detector Options: All options use PMTs and

Detector Options and Performance Criteria Ø Current Detector Options: All options use PMTs and are with aerogel removed. (A) Two-RICH option : with current RICH 1 optics (B) Two-RICH option : with modified RICH 1 optics (1) Vertical RICH 1 geometry (2) Horizontal RICH 1 geometry (C) Single RICH option: TRIDENT with two gas radiators. All PMTs with lenses, there are different PMT array layouts. Version 1 : PMT modules with 4 X 4 and 8 sparse PMTs Version 2: PMT modules with 5 X 5, 4 X 4 and 3 X 3 PMTs Version 3: New arrangement Ø Performance Plots: § Occupancies § Single photon resolutions § Photoelectron yields § PID curves: mis. ID vs Efficiency , Efficiency vs Momentum, mis. ID vs Momentum Ø This presentation: Focus on (A) and ( B 2) From Gauss-Boole-Brunel chain 3

Simulation Configurations • Recent versions of Gauss , Boole, Brunel: • Gauss v 44

Simulation Configurations • Recent versions of Gauss , Boole, Brunel: • Gauss v 44 r 3 p 1, v 42 r 2 , v 42 r 0, Boole v 26 r 1, v 26 r 0 , Brunel v 44 r 1, v 44 r 0 etc. Simulation Conditions: Luminosity cm-2 s-1 Beam Energy (Te. V) Lumi 2 -S 2 x 10 32 3. 5 Lumi 10 -S 10 X 10 32 7 Lumi 20 -S 20 x 10 32 7 § Luminosity per bunch crossing ( LB) Lb n m Lumi 2 -S 0. 247 x 1030 2 1. 4 Lumi 10 -S 0. 433 x 1030 3. 9 2. 73 Lumi 20 -S 0. 749 x 1030 6. 8 4. 76 Recent news: These may need minor modifications L B= Luminosity *11. 245 k. Hz / Crossing Rate No spill over S: PMT with Super-Bialkali 4

Detector and Run Configurations Current-Optics-RICH 1 - Spherical Mirror ROC=2710 mm Vertical-Optimized-Optics-RICH 1 Spherical

Detector and Run Configurations Current-Optics-RICH 1 - Spherical Mirror ROC=2710 mm Vertical-Optimized-Optics-RICH 1 Spherical Mirror ROC=3800 mm and with optics tuning Vertical RICH 1 configuration Horizontal-Optimized-Optics-RICH 1 -Spherical Mirror ROC=3800 mm Horizontal RICH 1 configuration • Most plots with about 20 K signal events of Bs ff 5

PID Performance Configurations • Cherenkov threshold in RICH 1 Gas for kaons = 9.

PID Performance Configurations • Cherenkov threshold in RICH 1 Gas for kaons = 9. 3 Ge. V/c. Below this use veto mode: PID efficiency reduced For now, assume no detector in this momentum range. ‘Official plots’ with P > 1. 5 Ge. V/c. ( Plots with P > 9. 3 Ge. V/c in backup slides) • Plots made with different PT cuts, ‘official plots’ with PT > 0. 5 Ge. V/c • Tracks used in the 0 300 mrad polar angle. 6

Current Optics: RICH 1 Acceptance OLD NEW mm mm Particle Gun in 290 –

Current Optics: RICH 1 Acceptance OLD NEW mm mm Particle Gun in 290 – 310 mrad mm OLD : Same detector area as that of current RICH 1 with aerogel (1920 pmts) mm NEW: Detector area 67% of OLD. (1280 pmts) Acceptance used: 300 mrad for tracks Particle Gun in 20 – 30 mrad mm Old: 12 X 5 X 2 modules, New: 8 X 5 X 2 modues 7

Current Optics: RICH 1 Resolutions Overall width= 1. 01 mrad Chromatic width= 0. 58

Current Optics: RICH 1 Resolutions Overall width= 1. 01 mrad Chromatic width= 0. 58 mrad rad Pixel Emis. Pt. width= 0. 63 mrad Single Photon resolutions with SBA PMTs. No track error included. width= 0. 61 mrad 8

RICH 2 Resolutions Overall Chromatic width= 0. 52 mrad width= 0. 32 mrad Emis.

RICH 2 Resolutions Overall Chromatic width= 0. 52 mrad width= 0. 32 mrad Emis. pt rad Pixel width= 0. 19 mrad width= 0. 37 mrad Single Photon resolutions with SBA PMTs. No track error included. rad 9

Current Optics : Yields Mean = 32 RICH 1 Yield RICH 2 Yield Mean

Current Optics : Yields Mean = 32 RICH 1 Yield RICH 2 Yield Mean = 22 Yields in the ‘good acceptace’ region (away from beam pipe). 10

RICH 1 Occupancy mm mm Lumi 2 -S: Current-Optics-RICH 1 pmt number Peak Occupancy

RICH 1 Occupancy mm mm Lumi 2 -S: Current-Optics-RICH 1 pmt number Peak Occupancy =13 % 11

RICH 1 Occupancy mm mm Lumi 10 -S: Current-Optics-RICH 1 pmt number Peak Occupancy

RICH 1 Occupancy mm mm Lumi 10 -S: Current-Optics-RICH 1 pmt number Peak Occupancy =22 % 12

RICH 1 Occupancy mm mm Lumi 20 -S: Current-Optics-RICH 1 pmt number Peak Occupancy

RICH 1 Occupancy mm mm Lumi 20 -S: Current-Optics-RICH 1 pmt number Peak Occupancy =31 % 13

Number of hits per event : Current Optics Lumi 2 -S Lumi 10 -S

Number of hits per event : Current Optics Lumi 2 -S Lumi 10 -S Lumi 20 -S 14

PID Performance Lumi 2 -S Lumi 10 -S mis. ID efficiency Current-Optics-RICH 1 P>

PID Performance Lumi 2 -S Lumi 10 -S mis. ID efficiency Current-Optics-RICH 1 P> 1. 5 Ge. V/c Different colors for different Pt cuts mis. ID For ‘official’ comparison: blue plots (Pt > 0. 5 Ge. V/c) Lumi 20 -S efficiency 15

PID Performance mis. ID efficiency Current-Optics-RICH 1 P > 1. 5 Ge. V/c, Pt

PID Performance mis. ID efficiency Current-Optics-RICH 1 P > 1. 5 Ge. V/c, Pt > 0. 5 Ge. V/c Lumi 2 -S, Lumi 10 -S, Lumi 20 -S 16

PID Performance All PID plots made with the standard software packages set up by

PID Performance All PID plots made with the standard software packages set up by Chris Traditional plots : Ø Efficiency and mis. ID vs Momentum for “heavy” and “light” particles. Ø Efficiency and mis. ID vs Momentum for kaons using a fixed cut : dll K > 0. 0 17

PID Performance Lumi 2 -S Momentum Me. V/c Lumi 10 -S Momentum Me. V/c

PID Performance Lumi 2 -S Momentum Me. V/c Lumi 10 -S Momentum Me. V/c RICH 1 -Current-Optics Lumi 20 -S Momentum Me. V/c 18

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c RICH 1 -Current-Optics

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c RICH 1 -Current-Optics Lumi 20 -S Momentum Me. V/c 19

PID Performance Lumi 2 -S Momentum Me. V/c Lumi 10 -S Momentum Me. V/c

PID Performance Lumi 2 -S Momentum Me. V/c Lumi 10 -S Momentum Me. V/c RICH 1 -Current-Optics Lumi 20 -S Momentum Me. V/c 20

Optimized Optics: RICH 1 Ø To reduce the occupancy and improve the PID performance:

Optimized Optics: RICH 1 Ø To reduce the occupancy and improve the PID performance: ROC 2710 mm --> 3800 mm Ø Two options considered: Vertical, Horizontal Ø This presentation: Focus on the Horizontal version. At the end, PID performance compared with those from ‘Vertical Optimized Optics’ and ‘Current optics’. RICH 2 : Unchanged: 7 X 13 X 2 modules 2912 pmts Module : 16 pmts, 113. 5 mm X 113. 5 mm 21

Horizontal RICH in Panoramics Clear gap between Velo Tank and RICH 1 -Flat mirror.

Horizontal RICH in Panoramics Clear gap between Velo Tank and RICH 1 -Flat mirror. Top View 22

Horizontal RICH + Velo 23

Horizontal RICH + Velo 23

Horizontal RICH 1: Acceptance Outer Edge Particle Gun: 290 310 mrad OLD: 2688 pmts

Horizontal RICH 1: Acceptance Outer Edge Particle Gun: 290 310 mrad OLD: 2688 pmts New 1920 pmts 12 X 7 X 2 12 X 5 X 2 modules Region removed. Particle Gun: 20 30 mrad Inner Edge New Detector area Ratio: Horizontal Optmized/Current Optics = 12/8 = 1. 5 24

Horizontal RICH 1: Single photon Resolutions Overall Width= 0. 76 mrad Chromatic Width=0. 57

Horizontal RICH 1: Single photon Resolutions Overall Width= 0. 76 mrad Chromatic Width=0. 57 mrad Reconstructed Cherenkov angle rad Emission pt. Width=0. 39 mrad Pixel Width=0. 33 mrad Sph Mirror ROC=3800 mm, Particle gun Resolutions similar to that from Vertical RICH 1 rad 25

Horizontal RICH 1: Yields Mean=36 Yield away from beam pipe Particle gun RICH 1

Horizontal RICH 1: Yields Mean=36 Yield away from beam pipe Particle gun RICH 1 26

Horizontal RICH 1: Occupancies mm mm Lumi 2 -S Reduced set of PMTs Horizontal-Optimized-RICH

Horizontal RICH 1: Occupancies mm mm Lumi 2 -S Reduced set of PMTs Horizontal-Optimized-RICH 1 PMT number Peak Occupancy = 9 % (approx) 27

Horizontal RICH 1: Occupancies mm mm Lumi 10 -S Reduced set of PMTs Horizontal-Optimized-RICH

Horizontal RICH 1: Occupancies mm mm Lumi 10 -S Reduced set of PMTs Horizontal-Optimized-RICH 1 pmt number Peak Occupancy= 16 % (approx) 28

Horizontal RICH 1: Occupancies mm mm Lumi 20 -S Reduced set of PMTs Horizontal-Optimized-RICH

Horizontal RICH 1: Occupancies mm mm Lumi 20 -S Reduced set of PMTs Horizontal-Optimized-RICH 1 pmt number Peak Occupancy= 22 % (approx) 29

Number of hits per event : RICH 1 -Optimized Horizontal Lumi 2 -S Lumi

Number of hits per event : RICH 1 -Optimized Horizontal Lumi 2 -S Lumi 10 -S Lumi 20 -S 30

RICH 1 Occupancies Peak Occupancy in % RICH 1 Optics Lumi 2 -S Lumi

RICH 1 Occupancies Peak Occupancy in % RICH 1 Optics Lumi 2 -S Lumi 10 -S Lumi 20 -S Current 13 22 31 Vertical. Optimized 8 14 19. 5 Horizontal. Optimized 9 16 22 Mean occupancy per event RICH 1 Optics Lumi 2 -S Lumi 10 -S Lumi 20 -S Current 1254 2141 2943 Verticaloptimized 1625 2749 3731 Horizontaloptimized 1772 3062 4044 31

Lumi 2 -S PID Performance Lumi 10 -S Horizontal –Optimized-Optics-RICH 1 Reduced –PMT P

Lumi 2 -S PID Performance Lumi 10 -S Horizontal –Optimized-Optics-RICH 1 Reduced –PMT P > 1. 5 Ge. V/c Different colors : different Pt cuts Plots for ‘official’ comparison: Blue plots Pt > 0. 5 Ge. V/c Lumi 20 -S 32

PID Performance mis-ID Horizontal-Optimized-Optics-RICH 1 Reduced-PMT P > 1. 5 Ge. V/c, Pt >

PID Performance mis-ID Horizontal-Optimized-Optics-RICH 1 Reduced-PMT P > 1. 5 Ge. V/c, Pt > 0. 5 Ge. V/c Lumi 2 -S, Lumi 10 -S, Lumi 20 -S efficiency 33

PID Performance Lumi 2 -S Lumi 10 -S Vertical –Optimized-Optics-RICH 1 Reduced –PMT P

PID Performance Lumi 2 -S Lumi 10 -S Vertical –Optimized-Optics-RICH 1 Reduced –PMT P > 1. 5 Ge. V/c Different colors : different Pt cuts Plots for ‘official’ comparison: Blue plots Pt > 0. 5 Ge. V/c Lumi 20 -S 34

PID Performance Vertical-Optimized-Optics-RICH 1 Reduced-PMT P > 1. 5 Ge. V/c, Pt > 0.

PID Performance Vertical-Optimized-Optics-RICH 1 Reduced-PMT P > 1. 5 Ge. V/c, Pt > 0. 5 Ge. V/c Lumi 2 -S, Lumi 10 -S, Lumi 20 -S 35

PID Performance Comparison mis. ID efficiency P > 1. 5 Ge. V/c, Pt >

PID Performance Comparison mis. ID efficiency P > 1. 5 Ge. V/c, Pt > 0. 5 Ge. V/c Current-Optics: Black: Lumi 2, Blue: Lumi 10, Red: Lumi 20 Vertical-Optimized-Optics: Green: Lumi 20 Horizontal-Optimized-Optics: Magenta: Lumi 20 36

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c Horizontal- Optimized-RICH 1

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c Horizontal- Optimized-RICH 1 Lumi 20 -S Momentum Me. V/c 37

PID Performance Lumi 10 -S Momentum Me. V/c Lumi 2 -S Momentum Me. V/c

PID Performance Lumi 10 -S Momentum Me. V/c Lumi 2 -S Momentum Me. V/c Horizontal- Optimized-RICH 1 Lumi 20 -S Momentum Me. V/c 38

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c Horizontal- Optimized-RICH 1

PID Performance Lumi 10 -S Lumi 2 -S Momentum Me. V/c Horizontal- Optimized-RICH 1 Kaon ID with dll K > 0. 0 Lumi 20 -S Momentum Me. V/c 39

Software Status § Full chain Gauss-Boole-Brunel used for simulation productions in LHCb with the

Software Status § Full chain Gauss-Boole-Brunel used for simulation productions in LHCb with the Current optics. § The horizontal ( and possibly the vertical) optimized versions to be integrated for productions § Brunel recently modified to work with the Horizontal configuration. As a DIY project with a help-line from the expert. § Conversion of Brunel to use with single RICH: More in-depth changes needed 40

Summary Ø Simulation performance of two of the RICH upgrade options are evaluated. Ø

Summary Ø Simulation performance of two of the RICH upgrade options are evaluated. Ø The optimized RICH 1 configurations offer a better PID performance compared to the current RICH 1 optics for the upgrade conditions. Ø Further optimizations being considered 41

BACKUP SLIDES 42

BACKUP SLIDES 42

Lumi 2 -S PID performance Lumi 10 -S Me. V/c Kaon efficiency and Pion

Lumi 2 -S PID performance Lumi 10 -S Me. V/c Kaon efficiency and Pion mis-ID Vs. Momentum Horizontal-Optimized-Optics-RICH 1 Reduced-PMT P > 1. 5 Ge. V/c, Pt > 0. 5 Ge. V/c Dll K > 4. 0 Lumi 20 -S Me. V/c 43

Lumi 2 -S PID Performance Lumi 10 -S Horizontal –Optimized-Optics-RICH 1 Reduced –PMT P

Lumi 2 -S PID Performance Lumi 10 -S Horizontal –Optimized-Optics-RICH 1 Reduced –PMT P > 9. 3 Ge. V/c (No ‘veto mode’ used) Different colors for different Pt cuts Lumi 20 -S 44

PID Performance Lumi 2 -S Lumi 10 -S Current-Optics-RICH 1 P> 9. 3 Ge.

PID Performance Lumi 2 -S Lumi 10 -S Current-Optics-RICH 1 P> 9. 3 Ge. V/c (no veto-mode used) Different colors for different Pt cuts Lumi 20 -S 45

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Typical PID Performance in Real Data: using HPDs 2011 data From Andrew Powell 26

Typical PID Performance in Real Data: using HPDs 2011 data From Andrew Powell 26 -11 -2012 data May not be the same conditions used for tracks in the MC plots. 47