1 / 26

High Energy Physics at U T A

High Energy Physics at U T A. UTA faculty Andrew Brandt , Kaushik De, Amir Farbin, Andrew White, Jae Yu along with many post-docs, graduate and undergraduate students investigate the basic forces of nature through particle physics studies at the world’s highest energy accelerators.

urania
Télécharger la présentation

High Energy Physics at U T A

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High Energy Physics at UTA UTA faculty Andrew Brandt, Kaushik De, Amir Farbin, Andrew White, Jae Yu along with many post-docs, graduate and undergraduate students investigate the basic forces of nature through particle physics studies at the world’s highest energy accelerators In the background is a photo of a sub-detector of the 5000 ton DØ detector. This sub-detector was designed and built at UTA and is currently operating at Fermi National Accelerator Laboratory near Chicago.

  2. Matter Molecule Atom Nucleus Baryon Quark (Hadron) u 10-14m cm 10-9m 10-10m 10-15m <10-19m top, bottom, charm, strange, up, down protons, neutrons, mesons, etc. p,W,L... Atomic Physics Nuclear Physics Electron (Lepton) <10-18m High Energy Physics Structure of Matter Nano-Science/Chemistry High energy means small distances

  3. What is High Energy Physics? • Matter/Forces at the most fundamental level. • Great progress! The “STANDARD MODEL” • BUT… many mysteries • => Why so many quarks/leptons?? • => Why four forces?? Unification? • => Where does mass come from?? • => Are there higher symmetries?? • => What is the “dark matter”??

  4. The Standard Model Standard Model has been very successful but has too many parameters, does not explain origin of mass. Continue to probe and attempt to extend model. • Current list of elementary (i.e. indivisible) particles • Antiparticles have opposite charge, same mass • the strong force is different! • new property, color charge • confinement - not usual 1/r2

  5. High Energy Physics Training + Jobs • EXPERIENCE: • Problem solving • Data analysis • Detector construction • State-of-the-art high speed electronics • Computing (C++, Python, Linux, etc.) • Presentation • Travel • JOBS: • Post-docs/faculty positions • High-tech industry • Computer programming and development • Financial

  6. UTA and Particle Physics Fermilab/Chicago CERN/Geneva

  7. Building Detectors at UTA

  8. Forward Proton Detector (FPD) - a series of momentum spectrometers that make use of accelerator magnets in conjunction with position detectors along the beam line • Quadrupole Spectrometers • surround the beam: up, down, in, out • use quadrupole magnets (focus beam) • Dipole Spectrometer • inside the beam ring in the horizontal plane • use dipole magnet (bends beam) • also shown here: separators (bring beams together for collisions) A total of 9 spectrometers comprised of 18 Roman Pots Data taking finished, analysis in progress (Mike Strang Ph.D.)

  9. Detector Construction At the University of Texas, Arlington (UTA), scintillating and optical fibers were spliced and inserted into the detector frames. The cartridge bottom containing the detector is installed in the Roman pot and then the cartridge top with PMT’s is attached.

  10. Tevatron: World’s Highest Energy Collider Fermilab DØ High-tech fan One of the DØ Forward Proton Detectors built at UTA and installed in the Tevatron tunnel

  11. The CERN Large Hadron Collider Location of LHC in France and Switzerland, with lake Geneva and the Alps in the background Proton-proton collisions at 14 TeV The ATLAS detector is currently being built at UTA and at 100's of other institutions all over the world

  12. NEW FP420 Overview FP420: Particle physics R&D collaboration that proposes to use double proton tagging at 420m as a means to discover new physics Used to be called Double Pomeron Exchange now Central Exclusive Diffraction

  13. -jet gap gap H h p p -jet beam dipole dipole p’ p’ roman pots roman pots Central Exclusive Higgs Production pp p H p : 3-10 fb E.g. V. Khoze et al M. Boonekamp et al. B. Cox et al. V. Petrov et al… Levin et al… Idea: M. Albrow & A. Rostovtsev forTevatron M = O(1.0 - 2.0) GeV Arnab Pal

  14. particle Cerenkov Effect n=1 n>>1 Use this property of prompt radiation to develop a fast timing counter

  15. proton Fast Timing Detectors for ATLAS WHO? UTA (Brandt), Alberta, Louvain, FNAL WHY? Background Rejection Ex, Two protons from one interaction and two b-jets from another How? Use timing to measure vertex photon How Fast? 10 picoseconds (light travels 3mm in 10 psec!) Pedro Duarte Shane Spivey

  16. Spread in timing as f() since n() 60 psec Fused Silica Bars • 9 cm bars • Some converted to mini-bars

  17. T958 • Fermilab Test beam experiment to study fast timing counters for FP420 (Brandt spokesman) • Used prototype/preprototype detector with NIM/CAMAC discriminator/TDC to test concept • Test beam at Fermilab Sep. 2006, Mar.+Jul. 2007 • Preparing for next run at CERN in October Time resolution for the full detector system: 1. Intrinsec detector time resolution 2. Jitter in PMT's 3. Electronics (AMP/CFD/TDC)

  18. beam 3.7 cm QUARTIC Preprototype side view 9.0 cm 4.7 cm 1.97 cm 2.57 cm 50º 2.54 cm 2.54 cm 2.54 cm top view MCP-PMT 6.4 cm 1.53 cm top view (photo)

  19. Initial Results G1-G2 For events with a few bars on see anticipated √N dependence <70 psec >90% efficiency

  20. Scope (Tektronix DPO70404) Analysis Waveform2 sample 755 events: Trigger Ch3xCh1CH1 QBE > Ortec9306CH2 G01 > HamamatsuCH3 G02 > ZX60CH4 QBD > 18dB > Phillips2

  21. Scope Analysis (t)=35 ps 13 ps for Gastof 60 ps/bar for QUARTIC combining with electronics resolution gives ~20 ps track measurement, ~30 rejection factor CFD algo simulated

  22. Baseline FP420 Detector 2 QUARTICs Lots of silicon 1 GASTOF

  23. Conclusions Many Opportunities for state-of-art research with one of the top HEP groups in the country/world!

  24. GOOD NEWS! • DOE ADR awarded A.B. $75k includes money for fast scope, CAEN HPTDC, electronics, travel to CERN testbeam, etc. • Recently funded by NSF for WMD detection using gold-coated scintillation nanoparticles • My sabbatical was approved by UTA, I plan to be at CERN Jan-Aug 2008

  25. YOU can perform fundamental research using world’s highest • energy particle accelerators: • UTA’s five HEP faculty, many grad students and post-docs are part of • collaborations at Fermilab and CERN, investigating the Origin of • Mass (Higgs Searches), Supersymmetry, Extra-dimensions, and QCD • YOU can build state-of-the-art detectors: • The new CPB includes unparalleled facilities for detector construction • YOU can develop “The GRID”, the next step beyond the Internet: • UTA faculty leading international efforts in this area, including the new Tier 2 • Computing Center which makes UTA one of the top ATLAS institutions • in the U.S. • (http://www-hep.uta.edu) Why High Energy Physics At UTA??

  26. International Linear Collider Next Generation Accelerator (White,Yu)

More Related