FPD STATUS

1. FPD STATUS Carlos Avila Uniandes/UTA • FPD overview • Roman pot and detector status • FPD readout integration status • Software status • Stand-alone DAQ

2. DØ Forward Proton Detector • 18 Roman Pots with scintillating fiber detectors: • 1 Dipole spectrometer • 8 Quadrupole spectrometers. FPD provides the capability of tracking the P or scattered in a diffractive collision. Carlos Avila, Uniandes/UTA

3. VETO COUNTERS VETO COUNTERS  5.2<h<5.9 LM COUNTERS  2.5< h< 4.4 Used for triggering on rapidity gaps.

4. DIFFRACTION THESIS TOPICS

5. THE DETECTOR • Six planes of fibers: • (U,U’,V,V’)  20 channels; (X,X’)  16 channels • (’) planes offset by 2/3 fiber • Total channels per detector = 112; 4 fibers (800 mm)/channel • one LMB fiber (250 mm) per channel • 80 mm theoretical resolution • 7 MAPMT’s (H6568) to readout one detector

6. DETECTOR ASSEMBLY 1 MAPMT PER FIBER PLANE DETECTOR CARTRIDGES

7. ROMAN POTS AND DETECTOR STATUS • 17 Roman pots are installed.A2U roman pot: removed to fix vacuum leak, will be re-installed in Jan. 2003 shutdown. • 9 Scintillating Fiber detectors and 3 Pseudo detectors already installed. • PHASE I = 10 sci. fi. Detectors. (essentially complete by end of October) • PHASE II = Install remaining 8 sci. fi. Detectors  still need $80k for MAPMT’s

8. POT INSERTION AND MONITORING Pot motion commands Insertion steps STATUS Monitoring through Acnet • Pot motion system has been tested extensively and shown to be reliable. All pots with detectors are routinely inserted. • Working towards automatic pot insertion.

9. TRIGGER ELECTRONICS Trigger electronics requirements • 3 AFE boards to read out vertical spectrometers and dipoles • 2 AFE boards to read out horizontal spectrometers • 1 Sequencer , 1 VRB, 3 DFE’s

10. Transition Patch Panel (TPP): Interface to AFE. • - Decouples tunnel and Platform grounds. • – Shapes FPD signals to operate within dynamic range of AFE. • FPD SEQUENCER : • FPD signals delayed by long TOF and cables. FPD sequencer delays AFE controls. • Sequencer can handle only two delays. Third delay will be produced in AFE firmware.

11. FPD INTEGRATION STATUS • Dipole detectors have been connected through AFE readout chain. Final issues with database are being addressed. Commissioning of our first AFE board will proceed during October 2002. • Unpacking of FPD signals through AFE has been implemented. Working on FPD examine. • 2 more AFE’s expected to be installed in November 2002 to complete FPD Phase I readout integration. • DFE firmware has been implemented and is being tested. DFE boards are being stuffed. • Trigger manager commissioning will proceed in parallel with DFE commissioning • LM TDC boards are needed to include our trigger scintillators in the trigger manager. Important issue for FPD

12. SOFTWARE STATUS • MCPP diffractive event generator and FPD detector simulation complete. Trigger simulation starting. • Unpacking complete for one AFE board. Working on data base for geometry, calibration, trigger electronics. • Track reconstruction program for single track events complete and being tested with stand alone DAQ. • Need to include FPD information into DST and thumbnail. • FPD analyze is being implemented and tested with stand-alone DAQ. • Significant amount of FPD software included in P13.

13. Stand Alone DAQ • This is a backup DAQ while integration to DØ is being completed. • Capability for reading out only two fiber detectors. • Elastic and Diffractive triggers implemented.

14. FIBER ADC DISTRIBUTIONS

15. ELASTIC TRIGGER DATA X resolution X,Y detector correlations x Distribution t Distribution

16. TRIGGER SCINTILLATORS TDCs From TDCS : 18ns = (396ns – L1/c) – L1/c 4ns = (396ns – L2/c) – L2/c  L1 = 56.7 m; L2 = 58.8 m Tevatron Lattice: L1 = 56.5m; L2 = 58.7m

17. FPD OPERATIONS • We have had CAL/FPD combined shifts during September for day and evening shifts. We are starting now 24 hours with Cal shifters. FPD expert on call. • We have had delays fixing problems in our hardware in the tunnel because tunnel accesses are not being granted very often (Dt = 3 to 4 weeks). • We are planning to install an air compressor system to blow fresh air to our detectors in order to reduce High He levels. • Information of TLD badges installed at our detector locations indicates that radiation levels at our detectors are not an issue for a long operations period. • Some stores have high halo rates which limit pot insertion (Under study).

18. CONCLUSIONS • FPD phase I is nearly completed. Completion of Phase II depends on funding. • We have made a lot of progress towards integration into DØ. Commissioning of dipole detectors through AFE during October. Other 2 TPP and AFE boards to be installed during November. Expected completion of readout integration during the next two months. • We need TDC vertex boards soon to be able to incorporate LM and VC signals into FPD trigger manager. • Stand-alone DAQ has been very useful for understanding our detectors. We will keep taking data with it until we are fully integrated into DØ. We expect to have Elastic + diffractive dN/dt and x distributions by the end of 2002. • If you are interested in contributing to one of our physics topics, talk to the QCD conveners.