1. Andrew Brandt FPD Rio Workshop Mar 29-30 20041 Forward Proton Detector Overview Andrew Brandt University of Texas at Arlington

2. Andrew Brandt FPD Rio Workshop Mar 29-30 20042 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 Workshop Goals

3. Andrew Brandt FPD Rio Workshop Mar 29-30 20043 Forward Proton Detector Layout  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 GeV 2 ) never before explored at Tevatron energies  Allows combination of tracks with high-p T scattering in the central detector D S Q2Q2 Q3Q3 Q4Q4 S A1A1 A2A2 P 1U P 2I P 2O P 1D p p Z(m) D2 D1 23 33 59 3323 0 57 Veto Q4Q4 Q3Q3 Q2Q2

4. Andrew Brandt FPD Rio Workshop Mar 29-30 20044   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 1000 tagged events expected in Run II DØ Run II Diffractive Topics

5. Andrew Brandt FPD Rio Workshop Mar 29-30 20045 Diffractive Topics and Students! Student Year InstituteAdvisorSubject Tamsin Edwards 2005 ManchesterB. CoxDiffractive Z production using gaps Ana Carolina de Jesus 2007 RioA. SantoroHeavy Flavor production in diffraction Helena Malbouisson 2007 RioA. SantoroDiffractive dijet structure function Luis Mendoza 2007 BogotáC. AvilaDiffractive W, Z James Monk 2006 ManchesterB. CoxDouble Pomeron Renata Rodrigues 2007 RioA. SantoroDiffractive jets (double Pomeron) Michael Strang 2004? UTAA. BrandtDiffractive jets tagged with FPD New student, Roman Otec, working on diffractive jets

6. Andrew Brandt FPD Rio Workshop Mar 29-30 20046  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. Castle Status

7. Andrew Brandt FPD Rio Workshop Mar 29-30 20047  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 Detector Status

8. Andrew Brandt FPD Rio Workshop Mar 29-30 20048 FPD DAQ and Trigger

9. Andrew Brandt FPD Rio Workshop Mar 29-30 20049 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

10. Andrew Brandt FPD Rio Workshop Mar 29-30 200410 Front View of PW08 (11/10/03) FPD Readout Thanks Daniel!

11. Andrew Brandt FPD Rio Workshop Mar 29-30 200411 (0,0) x y beam D2D1 D0 pbar p halo pbar halo pbar Standalone vs. AFE Readout 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 pbar p halo pbar halo

12. Andrew Brandt FPD Rio Workshop Mar 29-30 200412 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 2003 Steps Needed for Physics

13. Andrew Brandt FPD Rio Workshop Mar 29-30 200413 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

14. Andrew Brandt FPD Rio Workshop Mar 29-30 200414 dN/dT Result of the week Tremendous work especially by the Jorge’s to finalize the preliminary dN/dT measurement. Congrats again to Dr. Molina for first FPD PhD! http://www.fnal.gov/pub/today/archive_2004/today04-03-18.html

15. Andrew Brandt FPD Rio Workshop Mar 29-30 200415 M Z all M Z gap Tagged Z event in FPD Event Display gap muons Run II Diffractive Z → µµ

16. Andrew Brandt FPD Rio Workshop Mar 29-30 200416 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

17. Andrew Brandt FPD Rio Workshop Mar 29-30 200417 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 2003+2004 Goals 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 2003 2004

18. Andrew Brandt FPD Rio Workshop Mar 29-30 200418 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