Pierrick M. Hanlet

I'm having fun doing physics for University of Texas at Arlington on the DØ Experiment at Fermi National Accelerator Laboratory

Present DØ Involvements:

Here is a blow up cartoon of an elastic event.

Here's a list of things that I'm doing"

• Tunnel Hardware Documentation
• PW08 Hardware Documentation
• Stand Alone Trigger and DAQ Documentation
• Integration of FPD with D0 Electronics
• Internal Talks
• FPD Data Analysis

Documentation for Tunnel Hardware:

• Here I have the safety document describing the purpose, location, and a brief description of circuit diagram for the LV power supplies going into the tunnel.
• The rack and crate configurations for the proton and anti-proton quadrupole spectrometers. I still need to draw one for the dipole spectrometer.
• Here is the map of detectors to Amp/Shapers

Documentation for PW08 Hardware:

• Layout of PW08 Rack. This drawing shows the placement of the Transition Patch Panel, or TPP, how the coax ribbon cables are routed, and how the flex cables attach between the TPP and cassettes.
• TPP layout: There is 1 TPP per AFE board. The labeling corresponds to AFE number "Ax" and MCM number "My". The horizontal lines correspond to the connectors for the coaxial ribbon cable. The dark shading shows which cables are connected to which AFE MCM. The larger boxes show how the detectors map into the AFEs.
• The cable map into PW08 will then look like this.
• For the sake of simplicity, I've generated a numbering scheme for the Cin:Apse pads which will be on the TPP.
• Here is the numbering scheme I've used for the Bulkhead connector pins.
• Using these maps, one can make the connections on the TPP using this map.

The circuit used in the TPP uses a diode to shape the signal. Due to the smallness of our signals out of the Amp/Shapers, we can forward bias the diode to keep it on so that the signal passes through. Huffman used this model to simulate the output, yielding this result. In the plot, the output is a 400µV, which would correspond to ~40fC of charge into the AFE. This is not yet optimized.

Documentation for Stand Alone Trigger and DAQ:

The Present configuration in the D0 Small Control Room is:

• This is a list of our NIM logic AND/OR Terms for FPD triggers.
• This is how AND/OR Terms and CAMAC inputs are generated for FPD triggers.
• This is the Logic Diagram for the entire Trigger Configuration.
• For ease of viewing, the individual triggers are:
  • Elastic Triggers
  • Diffractive Quadrupole Triggers
  • Diffractive Dipole Triggers
  With the OR of all triggers made in the Grand Trigger OR, or GOT.
• NIM crate configurations in Rack 1 (leftmost rack) and Rack 2 (middle rack). The labels are CxSyL, where `Cx' is crate `x' (x = 1,2,3, or 4), `Sy' is slot `y' (y = 1, 12), and `L' is which channel in the NIM module.

  The following labels describe the NIM modules:

  QLFIFO	Quad Linear Fan In/Fan Out
  QD	Quad Discriminator
  OD	Octal Discriminator
  Q4LU	Quad 4-fold Logic Unit
  Q2LU	Quad 2-fold Logic Unit
  D4LU	Dual 4-fold Logic Unit
  NIM-ECL	NIM-ECL-NIM Converter
  QGDG	Quad Gate-Delay-Generator
  DGDG	Dual Gate-Delay-Generator
  nXmLFO	nXm Logic Fan Out

• This is the timing diagram used for the creation of the `I' (intime) and `E' (early time) terms used in the logic. Note that the times in the drawing between gates are based on TOF alone. Since all quadrupole detectors are timed in together, the difference between `ECLK' and `ICLK' is based on TOF. However, since there are different length cables for the Dipole L0 counters, the TOF value in the drawing is not the same as the `ECLK' to `DCLK' gates.
• Coming eventually is the CAMAC crate configuration.

Integration of FPD detectors into DØ electronics:

• This is a more detailed view of the Readout and Trigger.
• Another view showing individual components and mapping is shown in this is the full chain for the FPD Readout and Trigger.
• Phase V Test Stand: Pictures of AFE support with cassette.
• Pictures of the TPP mounting frame with one comb and one partially stuffed TPP.
• First TPP signals: In both plots, the blue trace is the output of the pulse transformer and the purple trace is the output of the diode. The board is still missing a resistor and capacitor; the resistor will be needed if we have to forward bias the diode, and the capacitor might be needed to drain off excess charge. In the first plot, the scope time scale is 40 ns; the second plot shows the exponential decay on a 20 µs timescale.

FPD Internal Talks and Other Documentation:

• A description of our Readout and Triggering chains is given in my AFE Review Talk - 6 December, 2001
• A proposed schedule and list of hardware and personel requirements is given in AFE Planning Meeting - 14 December, 2001
• FPD Status Talk given at 11 January, 2002 D0 Commissioning Meeting and the 14 January, 2002 QCD Meeting.
• Beams Division Interview talk
• FPD Status and Plans Talk given at the 8 March, 2002 D0 Commissioning Meeting.
• I have modified the orignal FPD Safety Document by Mario Vaz. The Appendices are also included.

FPD Data Analysis:

• ADC Distributions: The plots include pedestal subtracted raw data (10,000 series), zero suppressed data (20,000 series), and TDC cut zero suppressed data (30,000 series). The zero suppression is performed by requiring a minimum of 11 ADC counts. The TDC cuts are those described in a previous email.
• Analysis Distributions: The plots include the time cuts used in the remainder of the analysis; hit distributions in each plane; multiplicity distributions for each plane; and multiplicity distributions for each detector, and multiplicity distributions for each detector with the requirement that each plane has 0 or 1 hit. Except for the time plots, all plots have suppression of the hot channels in U2 (these hot channels can be seen in the ADC distrubutions.)
• Event Selection Results: The events in this list are required to have 0 or 1 hits in each plane, and a minimum of 3 hits per detector for both P1D and P2D. The first column in the list is the counter which counts events passing these criteria; the second column is the event number as given in the data event. In Run 73, there are 186 events that satisfy these criteria!

Personal VxWorks page.

Previous DØ Involvements:

Run II Muon Upgrade

DØ Quantum Chromo-Dynamics

Direct Photon Analysis

QCD Tape Czar

DØ Speakers' Bureau

Previous Photon Analysis Progress:

• Trigger Simulated MC Photon Trigger Efficiencies. Last page shows comparison to data.
• Selection Criteria Efficiencies
• Comparison of different fragmentation functions on the photon purity w/out smoothing of MC distributions
• Comparison of different fragmentation functions on the photon purity with smoothing of MC distributions
• Plot comparing CDF and DØ direct photon production as a function of E_T in the central rapidity bin (|eta|<1.0). Both are compared to CTEQ2M and CTEQ4M using µ=E_T. This plot will be used at both Moriond QCD and Pheno-CTEQ at the end of March, and will be the first showing of new DØ photon results.
• Comparison of (data-theory)/theory vs x_T for different experiments.
• Latest draft of Photon IB PRL . This is displayed for observation only; I will go back this week and try to determine why the IA purities appear as they do.

  ---

• Steve Linn's D0 Note 3564 describing the new 1b results.
• Steve Linn's D0 PAM talk.

Previous Muon Upgrade Progress:

• Comparison of polishing techniques D0 Note 3561
• Muon test stand results (example from run on 6 February, with counters from PDT241):
  • PDT 241: ADC vs HV.
  • PDT 241: ADC sigma/ADC vs HV.
  • PDT 241: TDC vs HV.
  • PDT 241: TDC sigma vs HV.
  • PDT 241: Efficiency vs HV.
• Long term stability test results for LED Pulser System.
• Draft of LED Pulser System TDR. Note that plenyastuff remains to be filled in.
• LMB Mixing homogeneity test 1: The first two plots shows the average ADC counts as seen by the PMT, PIN Diode, and PMT/PIN for each position measured in a 10X10 array after the light has been mixed. The first plots show the mixing using a matched set of LEDs in the LED Block; the second shows the same for a mis-matched set of LEDs. The last page makes the comparison of the matched and unmatched LED blocks with errors; the error bars show the estimation of systematic error introduced from insertion. It is clear from the values of the variations that matching the LEDs improves the light homogeniety.
• LMB Mixing homogeneity test 2: shows a sampling of the ratio PMT/PIN at 9 different positions along the blank fiber block when the LED block is rotated 0-360 degrees in 90 degree increments. In each plot, a comparison is made of an LED block with matched LEDs and one with mismatched LEDs. The second curve confirms that the light is mixed by yielding the same amount of light at any orientation of the LED block; however, it is clear that matched LEDs yield a more homogeneous result.
• With the assumption that the light is well mixed from the mixing blocks, we test the uniformity of light distribution from the fibers. The inner error bars show the systematic error due to inserting; the outer error bars show the systematic error due to taping the connector. These errors cannot account for the large fluctuations; therefore we surmise that the variations are due to inconsistent fiber preparation.
• Fiber polishing DØ Note 3561

DØ Talks:

• QCD '97: Talk on Direct Photon Measurements at DØ and conference proceedings; Montpellier, France - 3 July, 1997.
• PHENO/CTEQ '98: Talk on Direct Photon Measurements at DØ; Madison, WI - 25 March, 1998.
• FNAL Users Meeting '98: Talk on QCD Process at Fermilab; Fermilab, Batavia, IL - 13 July, 1998.
• Hadron Collider Physics '99: CDF and DØ Photon and Di-Photon Results Talk and Paper; Mumbai, India - 15 January, 1999,

If you want to contact me, I can be reached at:

Here are some links to a few of my favorite things:

 
 For those of you in academia, you can download a 
PostScript version of my 
cv.
 
 For those of you in industry:
      

        
 You can download a PostScript version of my Resume

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