Friday (3/3/2000) Mucool meeting minutes:
Scribe: Vincent Wu
1. Ed Black gave an engineering update on the case 2 FOFO cooling
channel lattice.
The example he presented is a pi / 2 mode Be window cavity consisting
of 2 cavities with
2 cells in each cavity. An absorber is located between cavities. The
cavity has a simple pillbox
structure. Al Moretti raised the question that simple pillbox geometry
is unrealistic because of
the higher RF power requirement (which is due to lower shunt impedance).
In other word,
the cavity geometry is not yet optimized for high shunt impedance.
Finally, Ed gave a cost
estimate and the number of man hour for a 150 m long channel. The cost
of RF and solenoid
coils are not included in the estimate.
2. Dan presented some Icool simulation for a ~ 165 m long FOFO channel.
Its periodic cell
is 1.1m long with a 3.4 T on axis magnetic field, and 201 MHz cavity
with a gradient of
15 MV/m. It operates with a 30 degree synchronous phase. The transverse
emittance shows
an exponential fall off from about 13 to 2 pi mmr. The number of muons
along the channel were
also presented. The curve levels off after about 70 m into the channel.
This is work in progress.
3. Jocelyn gave an update on her work on the "flip" simulation geometry
that has no opposing current.
The simulation is done using Dpgeant. The parameters of the channel are
50 sections X 2.47 m / section
~32 cm LH per section, 500 u Al window
6 X 32 cm RF cavity, f = 200 MHz, 125 u Be window
3 X 50 cm coils, 1 X 30 cm coil, R = 70 - 80 cm
uniform B field, 5 T.
4. Panagiotis gave an update on what other people (i.e. Paul, ) are
working.
5. Krish gave an update on his work on induction linac in Dpgeant.
6. Al Moretti presented an update on what is going on in lab G.
Superconducting magnet from LBL will
arrive sometime next week.