1. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 1 The CDF MiniPlug Calorimeter Forward Physics Conceptual Design Prototype Results Final Design Cosmic Ray Test Run II Data M. Gallinaro (The Rockefeller University)

2. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 2 Forward Physics Hard Single Diffraction Double Diffraction Double Pomeron Exchange Forward Jets (jet-gap-jet) Exotics (DCC’s, Mini- centauros,…) Small-X gluon structure function

3. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 3 Conceptual Design PB plates in liquid scintillator WLS fibers to MAPMT Towerless geometry (no mechanical boundaries) “Tower” size determined by fibers’ grouping

4. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 4 Conceptual Design Measure charged and neutrals Hadrons release on average 1/3 of  0 energy Measure energy and position of both EM and hadron showers GEANT simulation:  /E(e + ) = 18%/  E  /E(  + ) = 30% independent of E Hadron tagging fibers after 24 r.l.

5. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 5 MP Prototype Detector: 28-r.l. (1 i.l.) long 15x15 cm 2 plates Bicron 517 L liquid scintillator Kuraray Y-11 WLS fibers Test-beam: low energy pions and electrons at BNL high energy beams at Fermilab in 1997

6. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 6 Prototype Results Linearity EM Energy Resolution e + Position Resolution  + Position Resolution

7. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 7 Test Beam Data 50 GeV  + 50 GeV e +

8. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 8 MiniPlugs in CDF-II Due to space constraints when Plug in “open” position, final MPs are 61-cm long (32 r.l. and 1.3 i.l.) Same plate/gap thickness, scintillator of prototype Larger hexagonal cell structure, balanced by increasing: Number of fibers (6 vs. 4) Fiber dia. (1 mm vs. 0.8 mm) (installed in November 2001)

9. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 9 Final Design

10. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 10 Final Design 6 WLS fibers = hexagon  1 MAPMT pixel 1 clear fiber to LED 252 hexagons viewed by 18 16-channel MAPMT 3 MAPMT outputs added  84 calorimeter “towers” (to reduce electronics’ cost) 4  rings: 3.6<|  |<5.1 18 + 18 “trigger-towers” East MP (viewed from IP)

11. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 11 MiniPlug Assembly

12. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 12 MiniPlug Assembly

13. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 13 MAPMT Test Channel-to-channel response Hamamatsu R-5900 (16 channels) MAPMT test setup

14. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 14 Cosmic Ray Test Measure response to single photoelectrons (Co 60 source) Trigger on cosmic rays for 60 o -section of one MP  Average response is  100 p.e./MIP x 10 amplification (prototype was ~55 p.e./MIP)

15. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 15 MP Calibration Run II :  s = 1.96 TeV Use slope from ADC distribution Tower-to-tower relative calibration with data/MC Energy scale from MC Pile-up at high luminosity (Slope-Fit)/Fit ~7% for each  ring

16. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 16 MP Collider Data Fully instrumented

17. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 17 MP Collider Data Particle multiplicity ~7   Tower E T distribution

18. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 18 Conclusions Two MP calorimeters (Pb/liquid scintillator) installed at CDF MPs measure energy and position of particles (3.6<|  |<5.1) Cosmic ray test resulted in light yield of ~100 pe/MIP per tower, exceeding design requirements MPs fully instrumented; first data taken from Collider run Forward physics goals (forward jets/gaps) MPs (together with Plug calorimeter) measure width of rapidity gap(s) from diffractive processes

19. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 19 “The universe (…) is composed of an indefinite and perhaps infinite number of hexagonal galleries.(…) There was no personal or world problem whose eloquent solution did not exist in some hexagon.” Jorge L. Borges in The Library of Babel

20. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 20 Roman Pot Fiber Tracker Fiber Tracker 3 trigger counters 240 channels 3 stations 57 meters from IP MIPs ( > 1000 counts)

21. M.Gallinaro, ``Innovative Particle and Radiation Detectors’’, Siena, October 21-24 2002 slide 21 Beam Shower Counters Beam Losses L1 Trigger (veto E/W, minimum bias)