D

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DØ FPD Overview Andrew BrandtUTA
FPD Workshop February 20, 2003 Fermilaab
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Workshop Goals

• Bring FPD detector group, proton-ID, and physics
  group together (if video allows),
• 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

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Diffraction Thesis Topics Soft Diffraction and
Elastic Scattering Inclusive Single
Diffraction Elastic scattering (t
dependence) Jorge Molina Total Cross Section
Centauro Search
Inclusive double pomeron
Search for glueballs/exotics Hard
Diffraction Diffractive jet Michael Strang
Diffractive b,c
Diffractive W/Z
Diffractive photon
Diffractive top Diffractive Higgs
Other hard diffractive topics
Double Pomeron jets Tamsin
Edwards Other Hard Double Pomeron topics
Rapidity Gaps Central gapsjets
Topics in RED were studied
Gap tags vs. proton tags
with gaps only in Run I Double pomeron with
gaps
lt100 events in Run I, gt1000 tagged events in Run
II
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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. A2U pot had vacuum leak
  and was
• disabled for 6 months and fixed during Jan. 2003
• shutdown.

A2 Quadrupole castle installed in the beam line.
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Detector Setup

• 6 planes per detector in 3 frames plus a trigger
  scintillator
• U and V at 45 degrees to X, 90 degrees to each
  other
• Planes in a frame offset by 2/3 fiber (4
  fibers/bin)
• 2 detectors per spectrometer, 7 MAPMT per detector

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Detector Assembly
At the University of Texas, Arlington, scintillati
ng and optical fibers were spliced and inserted
into the detector frames.
20 detectors (includes 2 spares) built at UTA,
sent to Fermilab, 10 installed, others in
preparation at Fermi (see Mike S. talk).
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Tunnel and Detector Status

• All 18 cartridges have been assembled, 16 are
  installed in
• tunnel (10 with full detectors 2 with trigger
  scint). The 10
• instrumented pots (Phase I) are ups, downs, and
  dipoles.
• Cables and tunnel electronics (low voltage,
  amp/shapers, etc.)
• installed and completely operational for Phase
  I, mostly
• operational for Phase II 18 pots setup (more
  later).
• 10 more detectors (includes 2 spares) are
  complete except for
• final polishing, which is in progress at
  Fermilab.

P2 Quadrupole castle with up and down detectors
installed.
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Veto Counters
In the October 2001 shutdown four veto counters
(designed at UTA, built at Fermilab) each of
which cover 5.2 lt ? lt 5.9 were installed
between DØ and the first low beta quadrupole
(Q4), about 6 m from the interaction point. The
counters, two each on the outgoing proton and
anti-proton arms, can be used in Diffractive
triggering (veto proton remnant).
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Pot Motion
Pot motion is controlled by an FPD shifter in the
DØ Control Room via a Python program that uses
the DØ online system to send commands to the step
motors in the tunnel.
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Pot Motion Safeguards

• The software is reliable and has been tested
  extensively. It has many safeguards to protect
  against accidental insertion of the pots into the
  beam.
• The drivers are disabled with a switch in the
  Control Room when the pots are not being moved.
• The pots are hooked to an emergency line
  which bypasses the software to send the pots back
  to the home position in case of emergency.

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Pot Insertion Monitor
Effect of the pot motion on the proton and
antiproton losses at DØ and CDF is monitored
using ACNET.
Current agreement with Beams Division and
CDF requires that the effect on halo rates is
less than 10.
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Recent FPD Milestones
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FPD Contributors
Brazil (LAFEX, UERJ, UFRJ, UNESP) UTA Los Andes
(people) Fermilab() Manchester(people) MSU
() Nebraska () Thanks Greg! NIKHEF () NIU
(Machine shop) Northwestern() Notre Dame
() Prague (people) Saclay (people) Manchester(peo
ple) Fermilab()
Can we generate more interest/support?
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PeopleJobs at Fermilab
Leaving Luiz, Jorge B. THANKS Jorge Leaving
FPD Victor THANKS Victor New people
Tamsin Edwards (grad student)
Mary Elena Pol (UERJ faculty 2 mos) Continuing
Full-time people Mike S.,
Wanda, Carley, Ricardo Continuing Part-time
people Mike M., Vladimir FPD Experts
Carley, Wanda, Ricardo, Mike, Victor Trainees
Tamsin ? Jobs 1) Trigger integration and
commissioning (all) 2) Expert shifts 3) Access
coordination (?AB) accesses (all?) 4) Run
planshift schedule (MSAB) 5) Friday 2 pm
meeting (MS) 6) Examine (MS) 7) Database Pot
motion (WPVS) 8) SCR triggering (MS?) 9) Data
analysis (MSTE) 10) Halo studies
(MSABWPCM) NEED MORE PEOPLE!
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FPD January Shutdown

• Access Coordinator Victor Bodyagin
• TUNNEL
• A2 vacuum repairs, requires coordination with BD
  and survey ? (completed without bakeout)
• Cable repairs ? (only a few dead channels remain
• in phase I note should produce list)
• Detector installation (12 detectors and 6
  pseudodetectors) ? (106)
• LVDT debugging ? (bad LVDT found)
• Pot motion upgrades some done (see W.P talk)
• Replacement of extension cablesORC (not done)
• Add some sandbags? (soon)
• COLLISION HALL
• PW08 preparation installation of 3 TPPs and
  AFEs 3 TPPs installed, but only 2 AFEs
• due to contact or noise problems (see
  V.B talk)

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Access List

• TUNNEL
• Detector installation A1IP1O to SCR
• (needs rearrangement of A/S to only use
  11 boards)
• Add sandbags at P2 and in front of electronics
• Open air flow on P side
• A2I LVDT replacement
• A1O pot motion debugging
• LMB pin/diode adapters
• Phase II work (July shutdown)
• COLLISION HALL
• Debug AFE/TPP noise

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FPD Operations

• Continue with expert shifters to insert pots and
  calorimeter shifters to monitor system and remove
  pots
• Re-establish operating positions, since may have
  changed due to access and A2 vacuum repairs
• Begin commisioning integrated FPD
• -Take calibration runs, understand noise
• -Finalize AFE timing
• -Take data recording FPD for all events
• Add new AND/OR terms and FPD triggers
• Work towards automated pot insertion
• Combine shifts with CFT
• (more in Mike S. talk)

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AFEDFE Integration
Most of these items will be discussed in other
talks would like to end up with detailed work
list schedule Key DONE ISSUES Know
how to do I) AFE 1) Adding AFE, Sequencer,
and VRB to database (VBWP) 2) Pile-up tests for
TPP (CAJA) 3) Update
FPD_AFE unpacking code (GA) 4) FPD_AFE
examine (CA,VB,MS with Abid) 5)
AFESeq Installation (GG, AFEs
temporarily) 5a) FIX SEQUENCER!!
(RR with JAFB 6) Method for installing 2nd3rd
TPP's installation (CARRVBRuss) 7)
Update of AFE firmware for 3rd time (RR with
JA,approval) 8) Start commissioning AFE
(VB,MS,WP,CM II) DFE 1) Purchase of
xilinx chips for first two boards (AB) 2)
Construction of 2 DFE board
(Jamieson) 3) Testing of DFE boards
(RRMV) 4) DFE firmware 1st draft
(RR,MV,WC) 5) fixing DFE speed problem
(RRMV) 6) Testing of DFE
boardsfirmware in CTS (RRMV) 7)
Installation of 1st DFELVDS cables
(RRMV) 8) DFE Examine/DFEware (RR) 9)
Signals through to TM

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Trigger Integration
III) Luminosity Monitor/Trigger scintillator 1)
LM TDC boards 2) LM Virtex boards 3) FPD_LM TDC
boards (CM) 4) FPD_LM Virtex boards
(CM) 5) LM Firmware (RRMV?) 6) LM
rates in EPICS (VBV.Sirotenko) 7)
FPD trigger from SCR until LM ready (VB) IV)
Trigger Managaer 1) Installation of TM
components Rob MccroskyCM 2)
Cables connecting TM3rd floor VBTom Diehl 3)
First FPD multiplicity triggers 4) TM
Firmware V) Phase II 1) 3 more TPP boards
(4th5th) spasre cutstuffed (RR with Bob Jones)
2) Test new TPP boards (RR) 3)
Install 4th5th TPP boardsAFE boards 4) Purchase
3rd DFE board chipsinstall 5) Update TM
firmware

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Goals for 2003

• 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
• Would like to produce a detailed list in all
  areas detector, software, PID, physics

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Steps Needed for Physics

• Partial list of steps needed to get to physics
• quality data
• Commission AFEs
• Include trigger scintillator information/
• basic and/or terms
• Alignment of FPD
• FPD database
• Activate FPD_Reco
• Halo understanding, reduction, and rejection
• FPD info in DSTs and Thumbnails
• Propose some reorganization to address some
• of these issues.
• Alignment Task Force to address alignment,
  calibration, folding in accelerator information
• Halo Task Force to propose studies for reducing
  halo and maximizing acceptance

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Random FPD Issues

• How to apply accelerator information to
• improve beam position measurement
• A/S pedestal fluctuations, need to evaluate level
  of problem, develop
• hot and dead channel list
• Decoupling LMB from calorimeter
• what is on your list?

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Discussion of Items from FPD-Probs Folder

• Vacuum Leak
• Pilot Error
• Controlled Lines On
• Controlled Lines Bypassed
• Controlled Access
• Smoke Alarms
• Helium
• Limit Switches
• Sequencer
• TPP

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Preparation forPhase II

• Requirements
• About 90,000 primarily for MAPMT for 6 more
  detectors,
• test MAPMT, install new detectors
• Upgraded 12V power supplies to accommodate 14
  A/S boards
• per quadrupole castle (A/S boards are in
  place)
• 2 more AFE/TPP boards (TPP boards and components
  exist
• but not yet stuffed), solve mechanical
  installation issues
• One more DFE board (need to purchase chips,
  stuff board)
• Some short cables from detector to A/S need to
  be repaired
• and tested
• Replace A2I LVDT
• Debug A1O IIB

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MRI for Phase II
Submitted with NIU, should hear about mid-summer
(50?)
Item Cost
Graduate Student 49,000
Equipment 92,000
Indirect Cost 36,000
Miscellaneous 2,000
Total 179,000
   
NSF 125,000
Match 54,000
Equipment Cost
MAPMT (56) 73,000
PMT (10) 6,400
LVDT (3) 2,200
Drivers/motors(3) 2,800
Xilinx chips 2,500
LV power 4,600
Total 92,000
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Elastic Data
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Timing is Everything

• We identify bunch structure of both proton and
  antiproton beam
• We can reject proton halo at dipoles using TDC
  timing
• CDF does not have this
• capability

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Conclusions

• Lots of progress
• Lots still to do
• Lets get to the physics