Scintillator Based Muon System R&D Proposals - Summary

1. Scintillator Based Muon System R&D Proposals - Summary http://www.hep.uiuc.edu/LCRD/pdf_doc/LCRD_UCLC_7.pdf • LCRD – Paul Karchin (karchin@physics.wayne.edu) DOE • UCLC – Arthur Maciel (maciel@fnal.gov) NSF • Institutions/Collaborators • Fermilab: Alan Bross, Gene Fisk, Kurt Krempetz, Caroline • Milstene, Adam Para, Oleg Prokovief, Ray Stefanski • Northern Illinois University: Jerry Blazey, Dhiman Chakraborty, • Alexandre Dychkant, David Hedin, Arthur Maciel • Notre Dame University: Mitch Wayne • UC Davis: Mani Tripathi • Wayne State University: Paul Karchin • Rice University: Paul Padley, J. Matveev, J. Roberts • University of Texas, Austin: Karol Lang

2. Design Concepts • mID from penetration of the Fe yoke instrumented with scintillator planes; • Use the muon detector to measure shower leakage; CAL depth varies from 4 –7l; • Similar to andetector, but….

3. R & D is Needed – Why? • Geometry and packaging are challenging. • Radiation environment; must be able to run for ~20 years. • Requires integration with barrel and forward detectors, structural Fe, solenoid, mechanical support, cables, etc. • Robust design parameters - must be understood, optimized, cost estimated, reviewed….

4. Scintillator Layout and Strips Scintillator: 4.1 X 1 cm2 co-extruded strips with 1 mm dia. WLS fiber and outer reflector of TiO2. U/V strips with wls shifted light exiting both ends. Add left/right signals from clear fibers to provide the pulse height sum.

5. MINOS Hamamatsu H6568 Multi-anode PM16 anodes ea. 4 x 4 mm2

6. MINOS – MAPMT with fiber guide

7. MINOS Scintillator Measured light output using the complete MINOS optical system: Connectors, clear fibers, multi-anode PMT’s Number of observed photoelectrons Distance along the module (m) Near 11±3 p.e. Far (3.6 m for the proposed layout) 6±2 p.e.

8. Barrel Ends Total WLS Fibers 51,200 42,766 93,966 187,932 Scintillator Area (m2) 7,174 4,353 9,527 Vol. (m3) 95.3 M(r=1.2g/cm3) 114.3T PM, Channel Count 16 channel multi-anode PM 30mm Clear Fibers Hamamatsu H6568

9. Physics Issues Many unanswered questions: • What is the scintillator based muon system tracking efficiency with the various tracking algorithms? e.g. for muons in jets? (Piccolo studies) • Energy flow: How much does the muon system reduce calorimetry errors? (Piccolo studies) • What are the punch-through rates for proposed geometries (Piccolo studies) and how much can punch-through be reduced with calorimeter+muon algorithms? • Studies of benchmark signals and backgrounds; signal/background numbers. • ………

10. Detector Issues • Specifications for detector components requires detailed knowledge of scintillator, fibers, MAPMTs – much of which is available from MINOS; NIU scintillator development. • FE electronics specifications based on performance of measured signals, noise, circuit ele. (NIU, UCDavis, Wayne State, UTAustin). • Detector geometry issues: Readout both ends of the scintillator strips? Routing of fibers? Layout of modules? U,V at 90 deg or small angle stereo? Dealing with ambiguities? Which PM, how many anodes, multiplexing schemes….? • Wire chambers at the entrance to the muon system?

11. Projects - UCLC Software(3 yrs) NIU • Contribute to a C++/GEANT4 stand-alone event simulation package (with others); • Help develop detector geometry & parameter input decoupled (e.g. external db) from simulation code – general framework with muon system as the example. • Develop muon tracking for this package of programs. • Integration of muon software with other detectors. • Documentation of the event generation, geometry description and analysis packages. • This is a major project that cannot go ahead unless the proposal is funded.

12. Projects - UCLC hardware(3 yrs) • Assemble and commission, with Fermilab, the NIU purchased scintillator extrusion machine. • Develop QC test stand for measuring the quality of extruded scintillator (NIU/Fermilab + 2 co-ops) • Develop grooving and WLS fiber gluing (UND/NIU). • Develop WLS/clear fiber splice, mechanical support, light tighting scheme, fiber routing. (UND) MX = 8? • Develop coupling of clear fibers to MAPMT. (UND) • Testing, calibration, data archiving, analysis schemes.

13. Projects - LCRD software(2 yrs) • Simulation studies to understand multiplexing (UCDavis/Wayne State). • Continued muon ID/tracking algorithm development and studies (Fermilab). • Participation in the development of GEANT4 based simulation, geometry definition and analysis software as manpower becomes available (Fermilab, UC Davis, Wayne State).

14. Projects - LCRD hardware(2 yrs) • PMT/scintillator + borrowed FE and ADC electronics tests and measurements (UC Davis/Wayne State) to develop specifications. • Rejuvenate cosmic ray test stand in the Fermilab Village to simultaneously test multiple strips (Wayne State, UC Davis & Fermilab). • Develop mechanical and electrical specifications for scintillator planes (Fermilab/Wayne State /UC Davis). • Develop mechanical plans for Fe/scintillator sandwich of planes (Fermilab).

15. Summary • We are beginning to make progress on some of the muon system studies that need to be done; • The lack of funding is holding back progress; e.g. two of our collaborating institutions could not send anyone to this workshop due to a shortage of travel funds. • Additional manpower is needed, especially in the area of software development. University groups are particularly well suited to providing this if there is funding available. • We are poised and ready…