Minutes of the Friday MUCOOL Meeting
                             10/22/99

 Scribe: Al Moretti

      The speakers for the meeting were Geer, Zisman, Li, Moretti,
  Black and Norem.

  S. Geer spoke about the agenda of Fermilab MuCool meeting Nov. 10 th
  allday and Nov 11 th half day morning. Thursday morning 9 to 12 am,
  Fernow, Lebrun and Wurtele will speak about the simulation worshop
  at LbL that started Oct 12 th . The final week of this workshop
  is to take place starting Nov 8 th at Fermilab. Thursday afernoon 
  13:00 to 17:30 the spearkers are Corlett, Moretti, Kaplan, Kevin,
  Cummings, Black and Green. Topics are low frequency cavities,LH2
  absorbers, solenoids, magnets status and R&D plans with time for 
  discussion. Friday morning the speakers are Norem, McDonald,
  Cremaldi and Bross. Topic are X-rays, TPC, Ckov particle ID and
  fast timing and their status and plans. Johnson and Greer  will
  conclude the workshop. Topics are The Illinois Consortium, MuCool
  options, timescale, and bugets.
       Zisman spoke about the onging Simulation whorkeshop at LBL.
  The main problems are ducumentation of the codes and agreement
  between Icool and Dpgeant. A third CERN codes Path is also being
  studied for comparison. The goals are to get the codes to agree for
  long channel lengths, understand the codes, documentation of the codes,
  produce bench mark cases, and a set of standardized plots.

    Li spoke about the liquid N2 testing of the interleaved low power
  test cavity at LBL. They cooled the cavity in high vacuum vesssel
  to liquid N2 temperature. The center cell was tuned to 890 MHz to
  match the low frequency end of their 500 W drive amplifer. The cavity
  was fitted with clamp on Be windows. The two end half cells were
  instrumented to measure the movement and temperature of the Be windows
  when the center cell only was driven through a coaxial drive line and loop.
  They were able to drive the center cell with 100 to 350 W. However
  the instrumentation had problems with detecting accurate deflections
  and temperature changes in the window. They are planning to make
  improvements in the above including the amplifier and continue the
  experiment in about 3 weeks. Also the Q of the half cells improved
  from 5000 to 9000 at LN2.

     Moretti spoke about the 200 MHz cavity caculations and the rf
  parameter page on the web page:
    http://www.fnal.gov/projects/muon_collider/nu-factory/    .
  The cavity is 0.60 m in dia and has a cell length .648 m. It has
  4 cm dia thin wall aluminum tubes across the aperature. it has 
  shunt impedance without transit time of 35 MOhms/m and Q of 69,000.
  Calculations were made using a energy loss factor of 0.303 MeV/c
  for muons in H2 and compared to Corlett's calculation of Oct 14 th.
  Our calculation on the 200 Mhz Pi mode cavity requires about 5 MW/m
  per cell while Corlett's is 3.8 MW/cell. Corlett's cavity is Pi/2 mode
  and uses according to my calculations a energy loss factor of
  0.269 MeV/m. If we were to use the same loss factor our
  rf power per cell would go down by 25%.

     Black showed drawings of a 2.5 m channel with a 30 cm long H2
  absorber and three 200 MHz pi mode cells. The cells are fed indenpently
  through 0.157 m coaxial cables and vacuum loop coupled to the
  cells. He and Kaplan are working on the stress calculations for the
  H2 wall thickness.

      Norem gave a update of the X-Ray experiment at Argonne. He showed
  plots of the X-Ray yields vs photon energy with a gradient of
  128 MV/m and about 2 MV across the cavity gap. Fluxes of 10 E12
  were noted at 1 MeV photon energy. He is planning on adding a
  sweeping magnet next to Be cavity window and get more accurate
  low energy results.