Performance of BEBE-prototype: A BEam-BEam counter prototype for the - - PowerPoint PPT Presentation

Performance of BEBE-prototype: A BEam-BEam counter prototype for the MPD-NICA experiment at JINR

Heber Zepeda-Fern´ andez CINVESTAV-IPN XLVII International Symposium on Multiparticle Dynamics (ISMD 2017) September 11, 2017

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Outline

1

Introduction

2

BEam-BEam counter detector (BEBE)

3

Results

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Introduction

Quark-Gluon Plasma to Hadron state

Figure: Phase diagram: Critical point location.

Through: Dilepton study, stranges particles. SPS (CERN) studies: NICA covers the gap.

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Introduction

Nuclotron-based Ion Collider fAcility (NICA)

Located in Dubna, Russia.

Figure: NICA complex.

The Baryonic Matter at Nuclotron (BM@N). The Spin Physics Detector (SPD). The Multi-Purpose Detector (MPD).

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Introduction

The MPD complex

Time Projection Chamber (TPC). Inner Tracker (IT). Time of Flight (TOF). Electromagnetic Calorimeter. Zero Degree Calorimeter. Fast Forward Detector (FFD). Magnetic solenoid.

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BEam-BEam counter detector (BEBE)

BEam-BEam counter detector (BEBE or Beam Monitoring Detector (BMD))

The BMD: An ambitious detector: Scintillator detector: Bc404. Increase the pseudorapidity region: 1.69 ≤ |ηBMD| ≤ 4.36. Optimization of events: Plane resolution. Centrality and Interaction point location.. Multiplicity reference estimator. Trigger system. Beam monitoring. Discriminate centrality events from background and beam-gas interaction. Determinate the absolute cross section of reaction process. Time resolution: 50 ps (arrival time scintillator-photons + electronic time).

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BEam-BEam counter detector (BEBE)

BEam-BEam counter detector (BEBE or Beam Monitoring Detector (BMD))

The BMD: An ambitious detector:

• 2 m

2 m Geometrical center of MPD

TPC TPC BMD

BMD-A Z2 Z1 Z3 Z4 BMD-C

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Results

Location of the interaction point

The goal of this work is to find the arrival time distribution and resolution.

cm

• 200
• 150
• 100
• 50

50 100 150 200

ns

• 15
• 10
• 5

5 10 15 Inside TA+TC TA-TC Outside TA+TC TA-TC

Collisions in/out BMD-A and BMD-C

Figure: Relation between the arrival time (TA and TC) to BMD with interaction point position.

Arrival time resolution: ∆σ = |σA − σC| = 57.982 ± 0.509 ps.

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Results

Finding the geometry to obtain 50 ps

Geant4 simulation (yellow square = APD): a)

Figure: Size: 10 cm high. 133.579 ± 21.803 ps ≤ ∆σ ≤ 226.409 ± 37.821 ps.

b)

Figure: Size: 5 cm high. ∆σ = 12.908 ± 4.762 ps.

We are close!

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Results

Conclusions

BMD will be an important detector for MPD. BMD will be able to find the point interaction location. The geometry to obtain the 50 ps will be found it in few time.

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Results

MEMEBERS of MeXNICA:

• M. en C. Heber Zepeda Fern´

andez.

• Lic. Luis Valenzuela Cazarez.
• Dr. Alejandro Ayala.
• Dr. Luis Manuel Monta˜

no Zetina.

• Dra. Mar´

ıa Elena Tejeda Yeomas.

• Dr. Mario Rodr´

ıguez Cahuantzi.

• Dr. Pedro Gonz´

alez Zamora.

• Dra. Isabel Dom´

ınguez.

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