Minutes/Action items of "Instrumentation-Systems-SDA" monthly meeting
February 4, 2009
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M. Convery, V. Lebedev, C. McClure, D. Morris, T. Meyer, 
D. Nicklaus, V. Papadimitriou, D. Slimmer, R. Thurman-Keup, 
M. Wendt, M.J.Yang, J. Zagel



We discussed the following:
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1) Status of Flying Wire systems - J. Zagel
  

2) MI IPM Acnet data - M. Denton


3) Improvements in the IPM Acnet Interface - T. Meyer


4) RFT board status - C. McClure


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Conclusions-Action Items:


1) 
a) The horizontal E11 Tevatron flying wire was disabled and unplugged locally for 
about one month. The problem was addressed in a recent Tevatron access. The motor
was changed and the wire is working again. The downward shift in response at flattop
after the wire started working again (see Vaia's plots), does not seem to be related 
to any calibration issues. It could be related to beam dynamic issues since the Tevatron 
group has not done anything specifically to reduce the horizontal emittance in that period. 

The E17 Tevatron wire is broken as of January 12, 2009 and awaits an appropriate access 
opportunity to be fixed.


b) We continue having problems with MI Flying Wires during multibatch proton injection
for the first pass in the second batch at 8 GeV. 
There was a theory that possibly the reason for the problem had to do with the data
processing for 8 GeV getting interrupted by the 150 Gev fly.
We decided to perform a test that was actually performed on February 5.
The 8 GeV flyspec (35) was set to call itself instead of the 150 GeV flyspec (36).
The problem with the second batch still persisted though, and was actually seen in both 
passes (and the front-end). The investigation is continuing. 
 

c) We still need to understand better the Tevatron bunch by bunch FW emittance evolution 
during the flattop and squeeze cases. We would like to try many wire flies before the 
jagging begins to see if there is a time when the data starts looking better.
This test is pending. The Tevatron group needs to understand better any possible 
operational issues before the study is scheduled.


d)
The Vertical MI wire seems broken again after operation in beam for a few months.
A clean lid is being prepared for installation at the appropriate opportunity 
(wire mounted, stress verified, needs to be pumped down and flown).
The possible advantages of flying a thinner wire instead were also discusse, and 
will be discussed in more detail with the MI group. 



2) 
Denton reported on checks of the H2 IPM ACNET data, focusing on the fractional tune
(device I:H2PMFP[3]) for which we have independent measurements via BPM turn by turn. 
There is a definite correlation in the data, but there are some inconsistent tune results
that are being investigated further. The first step would be for Randy to test and 
optimize the Labview fitting algorithms. The second step would be to try and introduce
in Labview Valeri's fitter instead of the "arbitrary" fitter.

The IPM devices were being datalogged on event+delay, and a few days ago they started being
datalogged on state changes. This works well. When the data is understood we will introduce 
into SDA as well. 



3)
There were two recent improvements in the IPM ACNET interface:
a) Mountain range has replaced the coulour intensity plot
b) Single turn plots have been added



4) 
For the RFT board which is currently being assembled a couple of parts are missing, 
and they have been already ordered and in transit to the lab. In the mean time the 
debugging is continuing. (During testing no devices on the RFT were recognized by 
the JTAG hardware but this was traced on February 5 to a missing ground and fix is
under testing).



Our next meeting is scheduled for Wednesday, March 4, 2009.