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Proliferation of Pots

Proliferation of Pots. In late 80’s there were UA8 Roman pots and temporary CDF pots (total cross section) Since then ZEUS LPS has been very successful H1 FPS less succesful due to acceptance, but VFPS planned . E811 (total cross section) CDF (1 spectrometer) end of Run I and Run II

eagan-becker
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Proliferation of Pots

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  1. Proliferation of Pots In late 80’s there were UA8 Roman pots and temporary CDF pots (total cross section) Since then ZEUS LPS has been very successful H1 FPS less succesful due to acceptance, but VFPS planned. E811 (total cross section) CDF (1 spectrometer) end of Run I and Run II DØ FPDRun II PP2PP (RHIC elastic scattering) LHC: CMS, TOTEM, ATLAS

  2. Roman Pot Bellows p p Detector P1UP P2OUT S Q2 Q3 Q4 Q4 Q3 Q2 S D D2 D1 P1DN P2IN A2 A1 59 57 33 23 0 23 33 Z(m) DØ Forward Proton Detector Series of 18 Roman Pots forms 9 independent momentum spectrometers allowing measurement of proton momentum and angle. 1 Dipole Spectrometer ( ) x > xmin 8 Quadrupole Spectrometers (p or , up or down, in or out) t > tmin

  3. E   Diffraction Thesis Topics 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 Diffractive W/Z Diffractive photon Diffractive top Diffractive Higgs Other hard diffractive topics Double Pomeron + jets Other Hard Double Pomeron topics Rapidity Gaps: Central gaps+jets Gap tags vs. proton tags Double pomeron with gaps <100 events in Run I, >1000 tagged events in Run II

  4. 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. Quadrupole castle A2 installed in the beam line.

  5. Detector Assembly At the University of Texas, Arlington (UTA), scintillating and optical fibers were spliced and inserted into the detector frames.

  6. Event Display P1D P2D beam beam up1 v1 xp16 x1 u20 vp20 X –view (above) Y - view x1

  7. Data Elastic x,y Correlations PD1x vs. PD2x (mm) Good correlation between x1,x2 and y1,y2 in data but shifted from MC expectation (3 mm in x and 1 mm in y) PD1y vs. PD2y (mm)

  8. Elastic ,t (calibrated) Calibrated  now peaks at 0 Minimum t about 1.0 Gev2  peak reasonably Gaussian, still 2x ideal MC resolution

  9. FPD Goals for 2002 • Finish commissioning Phase I of FPD (10 pots/5 spectrometers) • Become fully integrated with DØ • Start with diffractive jets and double pomeron studies

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