phone meeting Feb. 11, 2004

Attending: H. Kirk, I. Marneris --BNL
Peter Titus--MIT
Kirk McDonald--Princeton
Adrian Fabich, Frederick Bordry, Helmut Haseroth--CERN

Presentations: http://pubweb.bnl.gov/people/kirk/e951/phone_meetings/04_Feb11

The meeting began with a discussion by Peter Titus and Ioannis Marneris giving
an overview of the expected operational parameters of the pulsed solenoid.
This is based on the earlier work of Bob Weggel. The central information
is found on the second page of the Solenoid_parameters.pdf document. In
addition, Bob Weggel had provided an inductance for the solenoid of 373 mH.
Ioannis pointed out that our 600V-7200A requirement would increase to 650V or
even 700V depending on the busing infrastructure around the magnet. He
stated that we have a goal of 2% to 4% flattop repeatability and suggested
designing for 1%.

Frederick made it clear that there is no power supply at CERN that could
be made available for our proposed experiment in 06. He did state, however,
that a power supply with characteristics similar to our needs (6.2KA at 950V)
has recently been purchased for the LHC for 400K CHF (about $300K US).

Harold asked how the infrastructure required for the installation of such a
system would be managed, ie what would CERN provide and what would the
experiment need to provide. Frederick was unsure but said he would look into
it. A necessary component of this exercise is the location of the experiment.
Adrian said he would provide that information.


Ioannis then summarized the R&D effort at BNL toward the possible utilization
of a bank of batteries to provide the requisite power (see the document
battery_test.pdf). Testing has begun with a single 12V car/truck battery
which has a rating of 1400 Cold Cranking Amps. Test to date included
discharging the battery for a 15 sec time period similar the time profile
required for our pulsed solenoid. The intent is to eventually pulse this
battery 1000 times with charging periods added between discharges. He also
stated that he recently received two additional sealed batteries, each with
900 Cold Cranking Amp capacity. These batteries will be used for additional
series/parallel arrangement testing and are considered to be safer handling
operationally.