FPD STATUSCarlos Avila

Uniandes/UTA

1. FPD overview

2. Roman pot and detector status

3. FPD readout integration status

4. Software status

5. Stand-alone DAQ

18 Roman Pots with scintillating fiber detectors:

•1 Dipole spectrometer

•8 Quadrupole spectrometers.

DØ Forward Proton Detector

Carlos Avila, Uniandes/UTA

FPD provides the capability of tracking the P or scattered in a diffractive collision.

P

VETO COUNTERS

VETO COUNTERS 5.2<<5.9

LM COUNTERS 2.5< < 4.4

Used for triggering on rapidity gaps.

DIFFRACTION THESIS TOPICS

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 m)/channel

• one LMB fiber (250 m) per channel

• 80 m theoretical resolution

• 7 MAPMT’s (H6568) to readout one detector

DETECTOR ASSEMBLY

1 MAPMT PER FIBER PLANE DETECTOR CARTRIDGES

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

POT INSERTION AND MONITORINGPot motion commands Insertion steps

Monitoring through Acnet

1. Pot motion system has been tested extensively and shown to be reliable. All pots with detectors are routinely inserted.

2. Working towards automatic pot insertion.

STATUS

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

• 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.

Detector Cable delay

TOF Total Delay

A1,P1 236 ns 77 ns 313 ns

A2, P2 471 ns 103 ns 574 ns

D1,D2 444 ns 190 ns 634 ns

FPD INTEGRATION STATUS

1. 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.

2. Unpacking of FPD signals through AFE has been implemented. Working on FPD examine.

3. 2 more AFE’s expected to be installed in November 2002 to complete FPD Phase I readout integration.

4. DFE firmware has been implemented and is being tested. DFE boards are being stuffed.

5. Trigger manager commissioning will proceed in parallel with DFE commissioning

6. LM TDC boards are needed to include our trigger scintillators in the trigger manager. Important issue for FPD

SOFTWARE STATUS

1. MCPP diffractive event generator and FPD detector simulation complete. Trigger simulation starting.

2. Unpacking complete for one AFE board. Working on data base for geometry, calibration, trigger electronics.

3. Track reconstruction program for single track events complete and being tested with stand alone DAQ.

4. Need to include FPD information into DST and thumbnail.

5. FPD analyze is being implemented and tested with stand-alone DAQ.

6. Significant amount of FPD software included in P13.

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.

FIBER ADC DISTRIBUTIONS

ELASTIC TRIGGER DATAX,Y detector correlations X resolution

Distribution t Distribution

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

FPD OPERATIONS

1. 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.

2. We have had delays fixing problems in our hardware in the tunnel because tunnel accesses are not being granted very often (t = 3 to 4 weeks).

3. We are planning to install an air compressor system to blow fresh air to our detectors in order to reduce High He levels.

4. 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.

5. Some stores have high halo rates which limit pot insertion (Under study).

CONCLUSIONS1. FPD phase I is nearly completed. Completion of Phase II depends

on funding.

2. 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.

3. We need TDC vertex boards soon to be able to incorporate LM and VC signals into FPD trigger manager.

4. 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 distributions by the end of 2002.

5. If you are interested in contributing to one of our physics topics, talk to the QCD conveners.