Dan Kaplan presented the status of the LH2 absorber studies:

If the LH2 absorbers are each 64 cm long, they represent a cooling load
for 10^13 muons at 15 HZ of about 1/2 kW. This varies and is somewhat less
for 317 MeV/c muons (0.44) and somewhat more for 106 MeV/c muons (0.65).
Cryogenic cooling can take place by way of external heat exchangers as is 
done in experiments at Bates, CEBAF and SLAC. This carries with it the 
disadvantage of requiring additional hydrogen, and penetrations of the
solenoid by large pipes. Dan is looking into the possibility of 
using a closed cylinder with interior heat exchange.
Dan was advised to talk to Mike McCashan.

Al Russell gave an overview of the 15 Hz ping magnet and power supply:

This may need as many as 3-4 magnets to get sufficient kick in the space
available in the meson Area -- much needs to be done to nail down
the specifications for this device. We know that we need a fast rise
time of about 1.6 usec and a flat-top of about 31 us. Much can be gained if
we use a long lever-arm for the kick to minimize the field requirement.
Further updates should be coming.


Ray Stefanski presented the
minutes of joint BooNE/MuCool pulsed power supply meeting of 9-24-98
Present: Ray Stefanski, Alvin Tollestrup, Howie Pfeffer, Fred Mills, 
Dan Wolff, Ken Bourkland, Dave Neuffer, Janet Conrad.

The main points raised at the meeting are:

1. The horn and power supply are a critical path item for BooNE.  These are 
needed as soon as possible for testing. BooNE is happy to help the 
collider effort but will not be willing to delay its own power supply.

BooNE has begun work on the mechanical design of the first horn, which
may be built at Nevis Labs. Much of the design may be done at Nevis
or Los Alamos, but a Fermilab engineer must be assigned for the 
overall oversight. The goal is to have a workable horn for tests by
next summer. A power supply is need by that time, even if it's a
partial supply built to fire just one horn. 

2. The collider is interested in the technology of high voltage/ high current
switching devices, and wants to participate in the tests of the ABB
switch when it arrives.  This should be possible in the next four months, 
once a budget code is identified for purchase of the materials. These
switches may be useful to the muon collider, because they would make it
possible to pulse the liquid lithium lens without a transformer. This would
simplify the circuit, lower the cost, and eliminate a component which might
improve reliability.

3. The BooNE power supply would use four ABB stacks with independent
cap banks. This would provide for a conservative design, where each
stack would be called upon to operate well within its rated tolerance.
If this design fails, the most likely alternative is to use SCR stacks similar
to those used in the new LINAC modulator supplies. This would require 24 SCRs
per stack, but might be more reliable because a lot is known about
their operating characteristics. This might require a set of eight stacks
with eight cap banks.

4. A power supply exists at CERN that was used for test their 
liquid lithium lens. It was considered a possible supply for NuMI,
but the operating characteristics called for a transformer so it was
dropped. It isn't immediately applicable to the Muon Collider or BooNE
requirement because the dI/dt is to low.  However, the SCR's could be
replaced, making use of the cap bank, cabinets and other gear. Howie
will look into this.  This could be an easy and inexpensive way to get
a 15 Hz supply working at Fermilab.


Ray Stefanski discussed the outline of a CDR for the MuCool beam in
the meson Area.  We need to develop a cost estimate with schedule
requirements for this beam.  It isn't clear how we can get this done.

Outline for Beam Conceptual Design Report

1.  Introduction

2.  Project Overview
       location (Meson Area)
       production spectra
       magnet parameters
       beam specifications for mucool
       backgrounds
       Optics (Tom's note)
3.  Technical Elements (WBS)
       pings, kicker system
           magnet
           power supply
           beam monitors
           mechanical support systems
           utilities(ICW, power, vacuum)
       120 GeV proton transport system
           magnets
           power supplies
           utilities(ICW, power, vacuum)
           instrumentation
       targeting
           shielding
           monitoring
           utilities(ICW, power, vacuum)
       Proton Absorber
           shielding
           RAW
       Muon Beam Transport (~D2)
           instrumentation
           mechanical support system
           utilities(ICW, power, vacuum)
4. Cost & Schedule summary

5.  Implementation Plan