RUN 2B L1CAL MEETING MINUTES
                   4 November, 2004

Present
o Fermilab      M.Adams, S.Lammers, G.Pawloski, S.Rapisarda, A.Stone,
                N.Varelas, M. Camuyrano
o MSU           D.Edmunds, R. Brock
o phone         J. Mitrevski
o Northeastern  D.Wood
o Saclay        D. Calvet

TWG: (S.Rapisarda)
----

o All components arrived
    - one generator on loan to Alan Stone for BLS cable tests

o adapter to ADF backplane
  - being made on breadboard
  - a few more parts (~$200) need to be purchased


Saclay (D. Calvet)
------

o Denis attended Nuclear Science Symposium in Rome, 16-22 Oct
    - presented talk on Design and Test of Prototype Boards for
    the L1 Calorimeter Trigger Upgrade at the DØ Experiment"
    - NSS talk linked to L1cal upgrade webpages


MSU: ADF v2 (R. Brock, D.Edmunds)
-----------

o Layout
  - finished
  - instructions for fab & assembly finished
  - Gerber files made

o PCB fab & board assembly
  - last Monday, encouraging negotiations with firm in Wheeling, IL,
    for fab & assembly
  - Wed (yesterday), firm said they could not do the job
  - Dan investigating a firm Rochester Hills (suburb of Detroit)
  - in-house assembly of first few not considered feasible (1500
    parts/board, BGA's, etc.)



UIC: Cabling (M. Camuyrano)
------------
See Mario's talk on: http://dzero.phy.uic.edu/~marioc/ , click on
"Talk 11/14/2004"


o Mock-up of patch panel
  - current design (for patch panel) seems to work - see photographs
  in talk
    . have done this test using scrap BLS cables

o Impedance matching & attenuation
    - pulse shape (square pulse) and attenutation (sine wave)
    measured for different values of the "R2" resistor on the patch
    panel.  (see slides for traces and plots)
    - R2 = 8 Ohms cleans up the signal, give attenuation of
    about 0.80 at 13 MHz
    - Dan will at plots and numbers on web page and send mail to
    Mario et al. concerning what is appropriate for ADF input



Simulation (S. Lammers)
----------

o simulation meeting on 19-Oct
    - default EM algorithm establish for firmware work to proceed at
    Nevis
    - follow up investigations
        . Greg investigated futher the tower sharing of low-ET
        electrons: looks consistent with J. Heinmiller's RunIIa
        L2 studies
o pedestal subtraction
    - difference found between tsimL1cal2b and trigger rate
    tool: only highest 256 towers included in tsim, and no
    negative values
    - if there is no ped subtraction, it has implications for
    EM algorithms: can't do "fraction" cuts
    - ADF peak finding algorithm studied for 132 ns had a "rectifier
    effect", suppressing negative fluctuations: probably not an
    issue for 396 ns.
    - need a written description of planned treatment of pedestals
    for RunIIb