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DRAFT

# DØ International Finance Committee

**Report from the Scrutiny Panel**

**April 15, 2004**

Scrutiny Panel members:

*John Womersley (Chair), Iain Bertram (Lancaster), Amber Boehnlein
(FNAL), John Cooper (PPD), Gavin Davies (Imperial), Sijbrand de Jong
(Nijmegen), Klaus Ehret (Germany), Yannis Karyotakis (IN2P3), Peter
Mättig (Wuppertal), Pierre Petroff (LAL), Bob Tschirhart (CD)*

### The scrutiny panel met during February and March 2004 to look over the estimated costs of the full DØ computing plan and agree on them, to determine how to do the arithmetic for offsetting contributions, and to determine the viability of specific non-US contributions in Fiscal Year 2004.

Our conclusions are summarized in the spreadsheet table. As agreed at
the International Finance Committee, we work in US Fiscal Years. FY04
started on October 1, 2003.

The table is constructed as below:

-   The masthead count and number of students for each nation are taken
    from the DØ web pages. From these, the number of Ph.D.-holding
    physicists for each nation is derived. This number is multiplied by
    \$5000 to obtain the amount of the common fund contribution expected
    from each nation per year. The \$5000 for each Ph.D.-holding
    physicist was agreed at the last DØ IFC meeting as the target
    common-fund contribution.

-   Computing contributions are broken into FY04 and FY05.

    -   In FY04 we included one year of Monte Carlo generation, the
        autumn 2003 reprocesing ("p14 re-reco") and two months of
        reprocessing in late summer 2004 ("p17 re-reco").

    -   In FY05 we included one year of Monte Carlo generation and four
        months of reprocessing in autumn/winter 2004 ("p17 re-reco").

-   The value of remote computing contributions is based on the cost of
    providing such a capability at Fermilab, including the costs of
    disks, servers and so on (the cost of the so-called "virtual
    center"). For the future reprocessing and Monte Carlo generation,
    the number of events follows the DØ Computing Plan.

-   These contributions are assigned to the various nations based on the
    proportion of events processed at each location.

-   The total value of computing contributions for the full duration of
    FY04 and FY05 are estimated.

-   The net balance of (common fund owed) -- (computing contribution
    estimated) is shown at the bottom of the table.

It should be emphasised that these balances are estimated numbers
reflecting where we anticipate to be at the end of each fiscal year. The
computing contributions so far received in FY04 correspond to the
"p14-re-reco" and roughly half of the Monte Carlo.

Note that the panel did not include a multiplicative weighting factor
(\<1) for remote contributions, as has been done in (e.g.) BaBar. Since
we calculate the value of remote contributions to computing purely in
terms of production processing and Monte Carlo generation for the full
collaboration, and have excluded many other uses of remote centers such
as remote analysis, we do not believe such a factor is necessary. We
also included Monte Carlo since the DØ computing model uses the same
pool of resources for reprocessing and for Monte Carlo generation.

  ---------------- --------- -------- --------- --------- --------- --------- ------- --------- -------- -------- --------- -------- --------- ---------
  Nation                     Brazil   Canada    Czech R.  France    Germany   India   NL        Russia   Sweden   UK        others   USA       total

                                                                                                                                               

  Masthead count             21       5         11        63        40        18      18        58       9        36        32       322       633

  \# students                3        1         2         18        19        6       10        1        2        15                 63        140

  \# PhD\'s                  18       4         9         45        21        12      8         57       7        21                 259       493

                                                                                                                                               

  \$/PhD           5000                                                                                                                        

  \$ contribution            90000    20000     45000     225000    105000    60000   40000     285000   35000    105000    0        1295000   2465000
  owed                                                                                                                                         

                                                                                                                                               

  Computing FY04                                                                                                                                

  p14 re-reco      300,000            0.12      0         0.36      0.22      0       0.07                        0.23                         1

  value                               36000               108000    66000             21000                       69000                        300000

  MC               317,016            0         0.005     0.04      0         0.124   0.051                       0.287              0.493     1

  value                               0         1585.08   12680.6   0         39310   16167.8                     90983.6                      160727

  p17 re-reco      447,560            0.12      0         0.36      0.22      0       0.07                        0.23                         1

  value                               53707.2             161122    98463.2           31329.2                     102939                       447560

                                                                                                                                               

  Computing FY05                                                                                                                                

  MC               350,000            0         0.005     0.04      0         0.124   0.051                       0.287              0.493     1

  value                               0         1750      14000     0         43400   17850                       100450                       177450

  p17 re-reco      697,440            0.12                0.36      0.22      0       0.07                        0.23                         1

  value                               83692.8             251078    153437            48820.8                     160411                       697440

                                                                                                                                               

  Multiplicative   1                                                                                                                            
  factor                                                                                                                                       

  \$ contribution                     89707.2   1585.08   281802    164463    39310   68497                       262922                        
  04                                                                                                                                           

  \$ contribution                     83692.8   1750      265078    153437    43400   66670.8                     260861                        
  05                                                                                                                                           

                                                                                                                                                

  FY04 balance                        -69707    43414.9   -56802    -59463    20690   -28497                      -157922                       
  (estimated)                                                                                                                                  

  FY05 balance                        -63693    43250     -40078    -48437    16600   -26671                      -155861                       
  (estimated)                                                                                                                                  
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