Summary of E614 Beams Subgroup meeting 2000/05/29

Present: Jaap Doornbos, Glen Marshall, Mia Minnes, Dave Ottewell,
Tracy Porcelli, Vladimir Selivanov

1. Previous data on M13 muon beams - V. Selivanov

VS reviewed some previous measurements on M13 and M15 and
described his thoughts about what could and should be done to
find out more about the M13 beam line. See his posting at

http://stoney.phys.ualberta.ca/~e614//Projects/E614-S2/00006/beamnote1.ps.gz

He suggests that additional slits could be used to reduce the
long tails apparent in M13 profiles (and not in M15 profiles). He 
also suggests the measurement of beam emittance by measuring beam 
profiles at several positions along the beam (z) direction.

2. Strategy for measurements in November 2000

While much can be learned from measurements at higher momenta
with 2 wire chambers, some crucial information must be obtained
from a surface muon beam where scattering in a chamber dominates
the intrinsic beam divergence. This could be done with a
collimator or perpendicular slits in vacuum, at the end of M13
but some distance before a wire chamber. A slit box exists, but
apparently not the more important parts such as mechanical vacuum 
feedthroughs. 

ACTION: Dave Ottewell will find out what is available to get a
set of slits working in vacuum, with manual motion if remote
control is not an option.

In this context, DO also noted that the vertical plates were no
longer in the slit boxes at M13 F1 and F2. It is not clear how
this situation might detract from control of the muon beam into
the E614 solenoid, with existing tunes or with possible new
tuning strategies.

ACTION: Jaap Doornbos will check his tunes to see if they rely in 
any way on vertical collimation at F1 and F2.

3. Data and analysis requirements for November 2000

The software subgroup had requested a summary of our
requirements. This is mentioned in their minutes at

http://stoney.phys.ualberta.ca/~e614//Projects/E614SOFTWARE/00056/index.html

and a short description by GM is at

http://stoney.phys.ualberta.ca/~e614//Projects/E614-S2/00007/index.html

4. PERT updates

The information to be presented to the group meeting of
2000/05/31 was reviewed. See those minutes at

http://stoney.phys.ualberta.ca/~e614//Projects/E614/00041/index.html

from which the following is excerpted:

<<<
        Proton beam controls are on track (Tracy)
                Design studies
                MC
                Stability studies

        Power supply monitoring is underway
                - a draft report is out, but a final copy is coming
        One HP DVM has been ordered - many modules will be ordered
                - need a windows laptop

        Want to study Hall probes before radiation damage

        Replacement for TICS:  certainly not available before April
2001
>>>

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Date of next meeting:
Monday, June 12 at 13:00

Agenda so far: 
Jaap Doornbos on better beam tunes for M13 
Chris Walter on Strategy for measurements in November 2000 (continued)
(not yet confirmed)

-- 
 Glen Marshall                mailto:Glen.Marshall@triumf.ca
 TRIUMF, 4004 Wesbrook Mall   phone: 604-222-7466
 VANCOUVER, BC V6T 2A3        fax:   604-222-1074

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