Present: Chris Allgower, Andy Bacher, Georg Berg, Hermann Nann, Paul Pancella, Tom Rinckel
The meeting came to order in the large conference room at 3:05 pm.
TEST RUN ANALYSIS
Pancella reported taking a look at tracking back toward the target region using WC1 and WC2 data from the recent run. As expected, there appears to be insufficient resolution along the beam to distinguish scattering from sources like pumping apertures.
Rinckel presented a survey of several quantities that were recorded in a separate ADC during the recent run, principally the Hall probe voltages. These appeared nice and stable and reflected the inten- tional adjustments of the magnetic fields. It appears that we could profit from better resolution, which is available at the expense of (unneeded) range. Tom will look into making this change, and possibly adding some BPM inputs to the data via this ADC.
PUBLICATION
We next discussed an outline for a potential NIM contribution that was drafted by Pancella, Berg, and Bacher and distributed. Various members will draft pieces of this paper using this structure as a guide. We are still open to suggested improvements in the structure, or notification of major omissions. Besides starting to fill in the words, another useful next step may be to identify the key figures which should be included. Pancella will start on this.
HARDWARE ISSUES
Plates for building the new target box are due here June 4. Doskow is busy with current and near-future Cooler users, but will work on parts drawings for internal target components as time permits.
We noted that whenever the 'snout' on the T-magnet box exit comes down, we want to measure the thickness of the Kapton window, before it is lost or disposed of. Tom thinks it is probably 5 mil.
We spent considerable time discussing the large magnetic shield which will be placed on the upstream and outboard sides of the 6-degree magnet. Prior calculations should probably be redone in light of our more accurate understanding of the geometric constraints. Tom is looking at installation issues and designing supports; there are still lots of details to work out. Hermann will redo his calculations to check the remaining fringe field at the nearest lead glass phototube location. When this estimate is available, Chris may be able to test the need for additional shielding on individual tubes using a magnet he has access to.
Rinckel will check with John V. about the availability of materials for enlarging the downstream detector. He will also ask about the possibility of reusing the existing light guides as parts of larger ones.
The meeting broke up around 4:15 pm.