Minutes of the MuCool meeting, Nov 6th, 1:30 P.M. - 3:30 P.M.

The meeting was held in the 10th Phys. Conf. room.

Present, at Fermilab : Dave Carey, Steve Geer, Tom Kobilarcik,
Panagiotis Spentzrouris, Yuriy Pischalnikov , Paul Lebrun, Dan Kaplan, 
Edgar Black, Al Russell, Al Moretti, Dave Neuffer, Ray Stefanski,
and Norbert Holtamp.
Over phone lines, Steve Kahn (BNL), Bob Palmer, and Kevin Lee (UCLA).
Sribe was Norbert Holtkamp.

1.) Steve Geer announced the engineer who will be responsible for the
safety review of LAB G and equipment setup will be Bob Trendler. 
A meeting of all the people involved will have to take place soon to 
describe the safety issues.

2.) As already announced last week, Steve O'Day is going to leave the
lab soon. This has impact on the lithium lens development and on the 
set-up planned for the pbar target. Following a discussion with John Peoples, 
it was decided that the expertise for operation and development of Lithium 
lenses should be brought to and kept in the lab. Therefore
somebody will have to be hired especially for this subject. A job
description looking for a physicist will be prepared soon by the Beams 
Division. Also, henceforth, all liquid lithium lens work will be part
of the Muon Collider R&D program.

3.) A trip to DOE is planned. Steve Geer, Kirk McDonald and Bob
Palmer are going to discuss the present budget situation with DOE 
representatives. Input concerning money has to be given soon, 
if this should be taken into account for the present budget plan.

4.) Ray Stefanski again discussed the possibility of using a power supply
from CERN to drive the Lithium lens. Looking into the details of 
converting the existing CERN PS to 15 Hz (0.5 Hz now) does not look very 
attractive, because: 
a) the power input has to be changed from a European to an American standard; 
b) the charging supplies have to be upgraded. 
Building a new power supply from scratch based on the experience with a 15
Hz 200 kA supply for miniBooNE, seems like a  more attractive option. 
Whether this design can be upgraded at all to 500 kA will have to be 
investigated.  Because the parameters to date are not very well described 
(inductance, resistance, length diameter etc), the design is not easy. 
The goal is, to have a "flexible" design which can feed into different 
devices. The PS development, because it will be expensive, will be put on 
a contingency list. This list is part of the proposal given to DOE. Where 
to set up the PS is another subject of discussion. The preferred position is 
the final one close to the mucool experiment. Because this area will not be 
known and certainly not available for quite a while,  LAB G
should be the place to combine as much R & D activity as possible.
(Editor's note -- PE4 is being considered for the miniBooNE supply.)

Top 5) Paul Lebrun gave an update on the recent optimization of the muon
cooling channel with larger coils to accommodate the cavity.  Accidentally he
has used a configuration which did not cool anymore. The unfortunate surprise 
was, that small deviations in the magnetic field can change the cooling 
performance  drastically. This implies stringent tolerances on the magnetic 
field. If the field value is changed by only by 5% in (B1-B2)/0.5/(B1+B2) 
and by only 2% absolute which the configuration can go from cooling to
non cooling. The expected tolerances are of the order
of a few percent at field values of 15 T max. During the presentation, 
while Bob Palmer was on the phone,  Bon confirmed that small differences in the
results from DPGeant and ICOOL may be due to the fact that Bob
actually uses a magnetic field calculated from a current while Paul takes 
the magnetic field profile and normalizes the profile to 15 TESLA. They have 
to check this. It is not really well understood but definitely seen in the 
simulation that the cooling is very sensitive to the field profile. It has to 
be discussed also how to give the simulated field to engineers to
make a real coil for it. (By specifying Bz(z) or the current sheets.(
In parallel: (like usual) Space requirements for the hydrogen coming in
and for the waveguides have been discussed as well. Ed Black is going to 
incorporate this in the drawing. The waveguides are no longer at the center 
of the magnet.

6.) Panagiotis Spentzouris

Optimization Issues

With the codes available so far a preliminary optimization tool could be
developed. Making use of ICOOL and /or DPGeant a minimization algorithm 
could be tested to optimize the cooling in the present baseline design, 
the alternating solenoid channel. The loss, the cooling or a combination 
of both can be used as a criterion.
So far, to optimize matching, a BASIC code to minimize dBeta/dz has been 
written by Bob and transferred to Spentz, who will make use of it. More 
discussion is required on the parameters for optimization. Spentz complains, 
that he does not yet have the physical insight to do it all by
himself. With more support from Bob he will be able to accomplish the
task. The question when the optimization code is ready for use 
(Steve Geere) was left open.

7.) Steve Khan gave an update on the cooling channel instrumentation.
Next week a more detailed calculation on the actual resolution will be given.
Optimization is required here as well. The present geometry will be used 
as a starting point for the optimizer.

8.) Tom Kobilarcik gave an update on the beam line layout to the
MESON Area. Many of the Quads and Dipoles could be powered in families to 
reduce the number of ps. The connection to the MESON Area has not been 
worked out in detail. If the MESON program comes, a lot of hardware will 
be provided by the program, and will not have to be provided by the mucool 
collaboration.

9.) Dan Kaplan shortly described the progress made on the layout of
the hydrogen absorber. He is working together with Ed. Black on the engineering
design.