1 / 18

Forward Proton Detector Overview

Forward Proton Detector Overview. Andrew Brandt University of Texas at Arlington. Workshop Goals. Bring FPD detector group, proton-ID, and physics group together, generate discussion Evaluate current status, problem areas, and issues Identify manpower shortages and attempt to address them

forest
Download Presentation

Forward Proton Detector Overview

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. Forward Proton Detector Overview Andrew Brandt University of Texas at Arlington FPD Rio Workshop Mar 29-30 2004

  2. Workshop Goals • Bring FPD detector group, proton-ID, and physics group together, generate discussion • Evaluate current status, problem areas, and issues • Identify manpower shortages and attempt to address them • Identify obstacles to producing physics results • Develop plan for next six months FPD Rio Workshop Mar 29-30 2004

  3. Forward Proton Detector Layout p p • 9 momentum spectrometers composed of 18 Roman Pots • Scintillating fiber detectors can be brought close (~6 mm) to the beam to track scattered protons and anti-protons • Reconstructed track is used to calculate momentum fraction and scattering angle • Much better resolution than available with gaps alone • Cover a t region (0 < t < 3 GeV2) never before explored at Tevatron energies • Allows combination of tracks with high-pT scattering in the central detector P1U P2O Q4 Q3 Q2 Q2 S D Q3 Q4 S A1 D1 A2 D2 P1D P2I Veto 57 59 23 0 33 23 33 Z(m) FPD Rio Workshop Mar 29-30 2004

  4. DØ Run II Diffractive Topics E   Soft Diffraction and Elastic Scattering: Inclusive Single Diffraction Elastic scattering (t dependence) Total Cross Section Centauro Search Inclusive double pomeron Search for glueballs/exotics Hard Diffraction: Diffractive jet Diffractive b,c ,t , Higgs Diffractive W/Z Diffractive photon Other hard diffractive topics Double Pomeron + jets Other Hard Double Pomeron topics Rapidity Gaps: Central gaps+jets Double pomeron with gaps Gap tags vs. proton tags Topics in RED were studied with gaps only in Run I <100 W boson events in Run I, >1000 tagged events expected in Run II FPD Rio Workshop Mar 29-30 2004

  5. Diffractive Topics and Students! New student, Roman Otec, working on diffractive jets FPD Rio Workshop Mar 29-30 2004

  6. Castle Status • All 6 castles with 18 Roman pots comprising the FPD were constructed in Brazil, installed in the Tevatron in fall of 2000, and have been functioning as designed (a vacuum leak was repaired 1+ years ago) • All castles were checked and underwent maintenance during Fall 2003 shutdown A1 Quadrupole castle installed in the beam line. FPD Rio Workshop Mar 29-30 2004

  7. Detector Status • In 2001-2002, 10 of the 18 Roman pots were instrumented with detectors. • Funds to add detectors to the remainder of the pots was obtained from NSF (mostly for MAPMTs) • During the fall 2003 shutdown the final eight detectors and associated readout electronics were installed. Dark current was verified with detectors in place. • Shielding was installed because of high rates seen before shutdown • Low Voltage Power Supplies were upgraded, installed and tested under full load A2 Quadrupole castle with all four detectors installed FPD Rio Workshop Mar 29-30 2004

  8. FPD DAQ and Trigger FPD Rio Workshop Mar 29-30 2004

  9. Resolution of TPP Noise Problem • Transition Patch Panel is used to interface between ribbon cable carrying signal from the tunnel and flex cable for the AFE • Before Shutdown, we saw rms values near 20 (4 or 5 is typical for AFE board) traced to a capacitive coupling on the board • Redesigned and replaced all (18) boards during the fall 2003 shutdown • After shutdown, rms values are near 4 or 5 • This issue delayed integration and diverted manpower, but it’s successful resolution allows us to proceed towards integrated physics FPD Rio Workshop Mar 29-30 2004

  10. FPD Readout Thanks Daniel! Front View of PW08 (11/10/03) FPD Rio Workshop Mar 29-30 2004

  11. Standalone vs. AFE Readout pbar p halo pbar halo beam x pbar y (0,0) p halo D0 pbar halo pbar D2 D1 Standalone Readout: particle passes through trigger scintillators AFE readout • Similar correlations • Uses trigger: • one jet with 25GeV and North luminosity counters not firing • This trigger suppresses the halo band FPD Rio Workshop Mar 29-30 2004

  12. 2003 Steps Needed for Physics • Partial list of steps needed to get to physics • quality data: • Commission AFE’s • Include trigger scintillator information/ • basic and/or terms • Alignment of FPD • FPD database • Activate FPD_Reco • Halo understanding, reduction, and rejection • FPD info in DST’s and Thumbnails FPD Rio Workshop Mar 29-30 2004

  13. 2004 Issues (aka Kotcher List) • Obtaining new elastic data sample • LM+Trigger Commissioning • Automatic pot insertion • Halo/background reduction and modelling • Detector studies, alignment, resolution, cross talk, efficiency • Tracking alignment, acceptance, database, efficiency, lattice uncertainty, MC • L2+L3 • Data handling and quality • Making sure a name and schedule associated with each task FPD Rio Workshop Mar 29-30 2004

  14. dN/dT Result of the week http://www.fnal.gov/pub/today/archive_2004/today04-03-18.html Tremendous work especially by the Jorge’s to finalize the preliminary dN/dT measurement. Congrats again to Dr. Molina for first FPD PhD! FPD Rio Workshop Mar 29-30 2004

  15. Run II Diffractive Z → µµ Event Display MZ all gap MZ gap muons Tagged Z event in FPD FPD Rio Workshop Mar 29-30 2004

  16. Fermilab+Operations • Partially due to new funding initiative of Brazilian/Columbian visitors, we have dramatically increased Fermi presence, from low point of Mike, Tamsin, and Daniel, to now include Ana, Helena, Renata, Luis, Roman with Luiz Mundim to go out for one year (Lum), many trips just concluded and others to begin soon. • Mike will describe operations, highlights include 18 pots routinely inserted once/day, and very little to do during accesses FPD Rio Workshop Mar 29-30 2004

  17. 2003+2004 Goals 2003 • Data taking with integrated Phase I • Add FPD triggers to global list • Complete funding and implementation of Phase II • Preliminary results on several physics topics 2004 • Data taking with integrated Phase II • Add FPD triggers to global list • Published results on dN/dT and Z • Preliminary results on several physics topics including double pom FPD Rio Workshop Mar 29-30 2004

  18. Summary • Early FPD stand-alone analysis shows that detectors work, will result in elastic dN/dt publication (already 1 Ph.D.) • Full 18 pot FPD now integrated into DØ readout (detectors still work), LM + Trigger still lagging • Commissioning of detectors and trigger STILL in progress • Need responsibility taken for every task (not just a name in a box) • Looking forward to an exciting and productive workshop FPD Rio Workshop Mar 29-30 2004

More Related