Forward Proton Detector Update. p. p. 9 momentum spectrometers comprised of 18 Roman Pots Scintillating fiber detectors can be brought close (~6 mm) to the beam to track scattered protons and anti-protons Reconstructed track is used to calculate momentum fraction and scattering angle
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Andrew Brandt, UTA
Andrew Brandt (UTA): FPD L3 Manager
Michael Strang (UTA GRA): detector construction, data analysis
Daniel Mendoza (UTA EE): readout and trigger commissioning
No longer employed by UTA:
Deepak Shivashankar (UTA ME GRA): detector cons. (-1/03)
Sahil Aggarwal (UTA UG): detector cons. (-1/03)
Carlos Avila (UTA/Los Andes): trigger integration, DAQ (6/02-12/02,6/03-8/03)
Victor Bodyagin (UTA/Moscow State): DAQ, electronics,database (10/01-1/03)
Ricardo Ramirez (UTA/Stonybrook EE): trigger, firmware (4/02-8/03+consulting)
Funding DOE OJI ($80k), Texas ARP (ends 12/03),
New NSF MRI (NIU+UTA $125,000, equipment+GRA for 2 years)
Soft Diffraction and Elastic Scattering:
Inclusive Single Diffraction
Elastic scattering (t dependence)
Total Cross Section
Inclusive double pomeron
Search for glueballs/exotics
Diffractive b,c ,t , Higgs
Other hard diffractive topics
Double Pomeron + jets
Other Hard Double Pomeron topics
Double pomeron with gaps
Gap tags vs. proton tags
Topics in RED were studied
with gaps only in Run I
<100 W boson events in Run I, >1000
tagged events expected in Run II
A2 Quadrupole castle
installed in the beam line.
Quadrupole ( p or )
Geometric (f) Acceptance
Dipole ( only)
better at low |t|,
Combination of Q+D gives double
tagged events, elastics, better alignment, complementary acceptance
At the University of Texas, Arlington (UTA), scintillating and optical fibers were spliced and inserted into the detector frames.
The cartridge bottom containing the detector is installed in the Roman pot and then the cartridge top with PMT’s is attached.
A2 Quadrupole castle with all
four detectors installed
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.
The software is reliable and has been tested extensively. It has many safeguards to protect against accidental insertion of the pots into the beam.
Front View of PW08 (11/10/03)
Old board- 1 cable attached
schedule; new board also has optimized dynamic range S/N=7
New board- 1 cable attached
Primary Goals:Installation of final 8 detectors and full readout system (new TPP and AFE boards)Tunnel:1) ***Installation and testing of final 8 detectors2) ***Pot motion tests 3) New 12V LVPS installation 4) Amp/shaper tests+repairs for new detectors5) LVDT tests6) Radiaton shielding ; Camera+light work 8) Extension cord work for ORC9) TLDs installedCollision Hall:1) ***Installation and testing of new TPP boards and AFE's2) Cable repairs 3) HV for final detectors4) DFE installationControl Room/Fixed Counting house:1) Automatic pot insertion tests2) Uncabling small control room 3) FPD_LM commissioning in progress4) ACnet+rate watcher mods5) Pots in/out dispaly switch 6) TM commissioning XLab 31) ***Detector assembly