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Semester Project: Linear Collider Beam Test Data Analysis PHYS 5326 Spring 2007 Jacob Smith.

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Presentation on theme: "Semester Project: Linear Collider Beam Test Data Analysis PHYS 5326 Spring 2007 Jacob Smith."— Presentation transcript:

1 Semester Project: Linear Collider Beam Test Data Analysis PHYS 5326 Spring 2007 Jacob Smith

2 The Small Picture Standard Model predicts and arranges particles SLAC (Ψ/J) Brookhaven (J/Ψ) Argonne (very busy) Fermilab (top quark) CERN (Ws and Zs, Higgs?) Where does the mass come from? (Higgs) Find @CERN, measure@ ILC High Energy Electron Positron Collider Calorimetry requires good (high) resolution

3 The Detector Race, SiD Four Detector Concepts GLD Concept LDC-Large Gaseous Tracking Sid-Silicon Detector Concept A Fourth Detector Concept Detector consists of sectors for measurement of specific processes Gas Electron Multiplier (GEM) calorimeter for the hadronic (HCAL) section

4 Gas Electron Multiplier Foils GEM Foil Cu clad kapton Consists of small holes Electric field due to potential difference across foil accelerates electrons from ionized gas Charge amplification occurs in holes Double GEM provides optimum gain 70  m 140  m Invented by Fabio Sauli/CERN From CERN-open-2000-344, A. Sharma Section of 30x30 cm UTA GEM foil

5 80:20 Ar:CO2 Cathode-Anode ΔV=2100 V ΔV=415 V

6 GEM Development Timeline Readout Electronics FunctionInstitution KPix chipAnalogSLAC DCAL chipDigitalArgonne Anode Board w/ Preamp AnalogUTA- Fermilab Implement 100 ch readout using new DAQ electronics, PC board, uses LabView (Carlos-UTA) Designing and Testing Signal Shaper to incorporate Fermi Pre- Amps with DAQ electronics New GEM chamber designs for SLICE test PAST PRESENT FUTURE SLICE Test Gas Mixture, HV, & Gain Efficiency Single chamber with one readout Single chamber with multiple simultaneous readouts Test Beam at Fermi National Laboratory 1 st Quarter 2007 SLICE test DCAL and KPix on GEM Argonne RPC w/DCAL Meter Cube Stack using Double GEM – Beam Test

7 Tests of detector Electronics pretests ADC needs a readable signal from detector Analysis depends on reliability of electronics Efficiency Correlation between scintillator and detector Multiplicity Cross talk between readout pads (tiles)

8 Tools for Analysis - Root Root Read in asciII file format Use root tools Create correlation histograms from nTuples Software controlled thresholds

9 { // example of macro to read data from an ascii file and // create a root file with an histogram and an ntuple. gROOTgROOT->Reset();Reset #include "Riostream.h" ifstream in;ifstream // we assume a file basic.dat in the current directory // this file has 3 columns of float datafloat in.open("basic.dat"); Float_t x,y,z;Float_t Int_t nlines = 0;Int_t TFile *f = new TFile("basic.root","RECREATE");TFile TH1F *h1 = new TH1F("h1","x distribution",100,-4,4);TH1F TNtuple *ntuple = new TNtuple("ntuple","data from ascii file","x:y:z"); while (1) { in >> x >> y >> z;TNtuple if (!in.good()) break; if (nlines < 5) printf("x=%8f, y=%8f, z=%8fn",x,y,z); h1->Fill(x); ntuple->Fill(x,y,z); nlines++; } printf(" found %d pointsn",nlines); in.close(); f->Write(); } Event23388 ch01.718750 Event23389 ch07.802734 Event23390 ch0-0.737305 Event23391 ch0-0.219727 Event23392 ch05.351562 Event23393 ch00.278320 Event23394 ch0-0.742187 Event23395 ch00.253906 Event23396 ch00.776367 Event23397 ch0-0.283203 Event23398 ch00.566406 Event23399 ch00.737305 Event23400 ch00.244141 Event23401 ch0-0.209961 Event23402 ch0-0.659180 Event23403 ch00.097656 Event23404 ch00.019531 Event23405 ch03.393555 Event23406 ch00.087891 Event23407 ch0-0.185547 Event23408 ch0-0.371094 Event23409 ch01.323242 Event23410 ch0-0.463867 Event23411 ch0-0.571289 Event23412 ch0-0.488281 Event23413 ch0-0.175781 Event23414 ch0-0.239258 Event23415 ch02.480469 Event23416 ch0-0.556641 Event23417 ch0-0.039062 Event23418 ch03.867187 Event23419 ch01.484375 Read Data (ASCI) Files 1 Event0 ch00.024414 Event1 ch00.297852 Channel Gain Queue Event2 ch02.045898 Event3 ch0-0.043945 Event4 ch0-0.595703 Event5 ch01.064453 Event6 ch00.068359 Event7 ch0-0.395508 Event8 ch0-0.727539 Event9 ch00.341797 Event10 ch02.060547 Event11 ch0-0.576172 Event12 ch00.078125 Event13 ch0-0.249023 Event14 ch0-0.356445 Event15 ch0-0.039062 Event16 ch00.454102 Event17 ch0-0.063477 Event18 ch0-0.166016 Event19 ch0-0.751953 Event20 ch00.156250 Event21 ch00.175781 Event22 ch0-0.317383 Event23 ch00.273437 Event24 ch0-0.620117 Event25 ch03.808594 Event26 ch00.312500 Event27 ch00.371094 Event28 ch0-0.068359 Event29 ch00.590820

10 Plans before Fermilab Test 1. Work with peers on re-familiarization of necessary programming tools 2. Use Arnab’s example Root files and nTuples to create single histograms, correlation histograms and normalization histograms 3. Commission GEM readout electronics taking advantage of Root functionality using data files from GEMview program 4. Create development tools for efficiency and multiplicity test using Root

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