Slide 1

1 Supervisor: Samir Arfaoui By: Fatma Helal Sawy Scintillator Tiles Studies CLIC detector and physics study CLIC dp Slide 2 2 CLIC detector concept Tracking system: records the paths taken by charged particles Interaction point 4-5T Solinod Electromagnetic calorimeter ( ECAL): measures energy of photons and electrons as well as the early parts of showers initiated by hadrons. Muon system Return yoke: is type of iron used for confining the magnetic field thats why its compact detector. The Hadron Calorimeter (HCAL) measures the energy of hadrons. Muon system Slide 3 ECAL for Linear Collider(LC) 3 Slide 4 Scintillator calorimeter for LC 4 Absorber Electrons: Bremsstrahlung Scintillator Strip Readout system SiPM: Photoelectric effect Electronics Acquisition Photons: Pair production Tile Slide 5 Before building, we need testing 5 What is the best cell size? How much light do we collect? Does it have a uniform response? The first step in building calorimeter with millions of cells, is building one cell. And to build this unit cell, we made test to get answers on that these questions Slide 6 6 The Task Do lab test on different plastic scintillators tiles to answer these questions Slide 7 7 Experimental setup Calibration Measurements (Scan) Data Analysis Results(Answers) Slide 8 8 A. Experimental setup Electron gun Device Under Test Feedthrough to lab next door Slide 9 The system Ingredients 9 Electron gun It's sr90 source. double beta emission. Slide 10 The system Ingredients 10 Triggering system Goal: trigger on particles that went through scintillator Crossed scintillating fibers (20x1x1 mm ) as trigger, fixed underneath DUT Each fiber is read out by a SiPM Both SiPM signals are put in coincidence Slide 11 Readout system 11 Scintillator is direct coupling with SiPM using optical grease. Slide 12 12 Place selected DUT in setup Switch electron gun ON Start automated scan At each scan step (~60 sec): define position(x, y) Recording integration of SiPM signals for each trigger. Measure temperature With the gun off, perform self-triggered run to measure gain at reference temperature Measurements Calibration Slide 13 Data acquisition 13 High voltage power supply for SiPM bias Feedthrough to dark room Coincidence circuit for triggering system (NIM) Low voltage for amplifier Current source for electron gun coil Scalers Slide 14 Data Analysis: 14 Each scintillator is divided into number of positions; each position is 1 x 1 mm . Get average light yield of each position. Create light-yield map for the whole scintillator. 30 x30 scintillator Slide 15 Data Analysis: 15 Every scanned position is affected by two main factors: The position of SiPM Temperature variation. Slide 16 Uniformity study 16 +/- 5%+/- 10%+/- 20% 92.598.9100.0 Slide 17 17 Full scan for 20x20x1 mm wrapped scintillator Slide 18 18 Slide 19 19 Slide 20 20 Back up Slide 21 CLIC detector and physics study 21 CLIC dp Slide 22 The Task 22 What is the best cell size? How much can cell collect light ? Is it have uniform response? Before building the whole scintillator, we need first built one cell. So we do lap test on different plastic scintillator cells to answer that questions. Slide 23 Calorimeter for Linear Collider(LC) 23 Slide 24 24 A. Experimental setup Slide 25 Experimental Setup 25 Devise Under test Triggering system Slide 26 26 Slide 27 Backup 27 Slide 28 CLIC: The Basis D. Schulte, Future Collider Technologies, CERN 2014 Drive Beam Generation Complex Main Beam Generatio n Complex Goal: Lepton energy frontier CLIC at 3TeV shown