Results of H4 VLE Simulations 03.11.2017, Marcel Rosenthal, Nikolaos - PowerPoint PPT Presentation

Results of H4 VLE Simulations 03.11.2017, Marcel Rosenthal, Nikolaos Charitonidis, Yannis Karyotakis, Yiota Chatzidaki

Outline • New optics (High Transmission, see Meeting 23.10.17, https://indico.fnal.gov/event/15578/) • Definition of “ GoodParticles ” • Particle rates for 80 GeV/c secondaries • Particle rates for -80 GeV/c secondaries • Background Studies: • Beam in H2 • Beam in H4 03.11.2017 M. Rosenthal 2

“ GoodParticle ” Definition 03.11.2017 M. Rosenthal 3

Schematic overview H4-VLE 03.11.2017 M. Rosenthal 4

Four explored Options • Option 1: same particle hits each detector (𝑱) • Detectors : TOF1, TRIG1, TRIG2 (𝑱𝑱) • Detectors : TOF1, TRIG1, TRIG2, BPROFs, COLL1, NP02front • Option 2: at least one 𝜌, 𝐿, 𝜈, 𝑓, 𝑞 hit in each detector (𝑱𝑱𝑱) • Detectors : TOF1, TRIG1, TRIG2 (𝑱𝑾) • Detectors : TOF1, TRIG1, TRIG2, BPROFs, COLL1, NP02front counted in option 1 & 2 only counted in option 2 03.11.2017 M. Rosenthal 5

𝝆 Composition 80 GeV/c → 7 GeV/c 𝑳 𝒒 𝝂 (𝑱𝑱) (𝑱) 𝒇 (𝑱𝑱𝑱) (𝑱𝑾) scored @ TRIG2 03.11.2017 M. Rosenthal 6

Momentum Spectra @ TRIG2 (𝑱) (𝑱𝑱𝑱) Timing not considered Momentum of all “ GoodParticles ” for different options 03.11.2017 M. Rosenthal 7

Four explored Options • Option 1: particle hits each detector (𝑱) • Detectors : TOF1, TRIG1, TRIG2 (𝑱𝑱) • Detectors : TOF1, TRIG1, TRIG2, BPROFs, COLL1, NP02front • Option 2: at least one 𝜌, 𝐿, 𝜈, 𝑓, 𝑞 hit in each detector (𝑱𝑱𝑱) • Detectors : TOF1, TRIG1, TRIG2 (𝑱𝑾) • Detectors : TOF1, TRIG1, TRIG2, BPROFs, COLL1, NP02front Following results obtained with selection scheme 3 (but no consideration of timing yet) 03.11.2017 M. Rosenthal 8

Rates for 80 GeV/c 03.11.2017 M. Rosenthal 9

Cu-target W-target Cu-target Pion Rate rate ± stat. error (fraction of GoodParticles) Physics list: FTFP_BERT Kin. energy cut: 10 MeV Scored at TRIG2 Selection scheme III Normalized to 10 6 in 4.8s 03.11.2017 M. Rosenthal 10

Cu-target W-target Cu-target Total Rate 𝒒 𝒇 𝝂 Physics list: FTFP_BERT 𝑳 𝝆 Kin. energy cut: 10 MeV Scored at TRIG2 Selection scheme III Normalized to 10 6 in 4.8s 03.11.2017 M. Rosenthal 11

Rates for -80 GeV/c 03.11.2017 M. Rosenthal 12

Cu-target W-target Cu-target Pion Rate rate ± stat. error (fraction of GoodParticles) Physics list: FTFP_BERT Kin. energy cut: 10 MeV Scored at TRIG2 Selection scheme III Normalized to 10 6 in 4.8s 03.11.2017 M. Rosenthal 13

Cu-target W-target Cu-target Total Rate 𝒒 𝒇 𝝂 Physics list: FTFP_BERT 𝑳 𝝆 Kin. energy cut: 10 MeV Scored at TRIG2 Selection scheme III Normalized to 10 6 in 4.8s 03.11.2017 M. Rosenthal 14

Background Studies 03.11.2017 M. Rosenthal 15

Full model: H4-beam on Particles scored in NP04 Fieldcage volume when H4 beam is on Detector materials currently vacuum: → Score all particles entering LAr volume in direction to field cage 03.11.2017 M. Rosenthal 16

Simplified detector model • Scoring of background currently in light blue box as seen below used dimensions: 6.2m ⋅ 6.2m ⋅ 5.9m (!) 03.11.2017 M. Rosenthal 17

Background Composition: 7 GeV/c (H4) 03.11.2017 M. Rosenthal 18

Background from Neutrons (7 GeV/c) 375 Hz in NP04 in case of beam in H4 a. u. 1 GeV/c 03.11.2017 M. Rosenthal 19

Background from Neutrons (7 GeV/c) 375 Hz in NP04 in case of beam in H4 a. u. 10 GeV/c 1 GeV/c 0.1 GeV/c Kinetic energy cutoff @ 10 MeV 03.11.2017 M. Rosenthal 20

Background from Muons (7 GeV/c) 312 Hz in NP04 in case of beam in H4 a. u. 10 GeV/c 1 GeV/c 0.1 GeV/c Kinetic energy cutoff @ 10 MeV 03.11.2017 M. Rosenthal 21

Muons & Neutrons 𝜈 𝑜 Target Momenta of VLE-magnets 03.11.2017 M. Rosenthal 22

Full model: H2-beam on Particles scored in NP04 Fieldcage volume when H2 beam is on Detector materials currently vacuum: → Score all particles entering LAr volume in direction to field cage 03.11.2017 M. Rosenthal 23

Background Composition 12 GeV/c NP02 “filled” with Vacuum 03.11.2017 M. Rosenthal 24

Background Composition 12 GeV/c NP02 filled with LAr NP02 filled with Water Density: 1.396 g/ cm3 (for cross-check) < 10 Hz < 10 Hz 03.11.2017 M. Rosenthal 25

Background from Muons (12 GeV/c) NP02 filled with Vacuum (40 Hz), much less in case of LAr (or Water) a. u. 10 GeV/c 1 GeV/c 0.1 GeV/c 03.11.2017 M. Rosenthal 26

Background from Muons (12 GeV/c) NP02 filled with Vacuum (40 Hz), much less in case of LAr (or Water) a. u. 10 GeV/c 1 GeV/c 0.1 GeV/c Kinetic energy cutoff @ 10 MeV 03.11.2017 M. Rosenthal 27

Background from Neutrons (12 GeV/c) NP02 filled with Vacuum (127 Hz), much less in case of LAr (or Water) a. u. 10 GeV/c 1 GeV/c 0.1 GeV/c Kinetic energy cutoff @ 10 MeV 03.11.2017 M. Rosenthal 28

Background Studies PhysicsList Comparison 03.11.2017 M. Rosenthal 29

Comparison of Background in NP02 Beam in H2, scored in NP02 • Geant4 PhysicsLists: (detector “filled” with Vacuum) • FTFP_BERT Shielding (recommended list for shielding simulations) 200 Hz increase of n similar estimates as FTFP_BERT 03.11.2017 M. Rosenthal 30

Comparison of Background in NP02 Beam in H4, scored in NP02 • Geant4 PhysicsLists: (detector “filled” with Vacuum) • FTFP_BERT Shielding (recommended list for shielding simulations) 03.11.2017 M. Rosenthal 31

Comparison of Background in NP04 Beam in H4, scored in NP04 • Geant4 PhysicsLists: (detector “filled” with Vacuum) • FTFP_BERT Shielding (recommended list for shielding simulations) 03.11.2017 M. Rosenthal 32

Summary • Detailed, combined model for H2 and H4 with VLE extensions implemented • New estimates of the trigger rates available for H4-VLE • nTuples for H4 will be made available on shared beamgroupdisk • Similar results of Background for different PhysicsLists “FTFP_BERT” and “Shielding” 03.11.2017 M. Rosenthal 33