Minutes of DRAGON Meeting of March 22, 2005.
Word file is attached and is better version.
__________________________________________________________________________________________________________________________
Present: AL, DG, CR, MT, JD'A (recorder replacement), LB, GR, PM, DH, AO,
guests from York, JC, CV,
DFOT, JP, BG
1. Minutes of 03/15/05 meeting reviewed and approved with no
changes.
2. Business arising:
Action item: Red Flag now indicates ED1 off
3. Comments from DRAGON Operations in Ne Run
a. Charge X-slit may not be moving properly as it was noticed that it was
going slowly to new positions and perhaps not getting to new positions.
It may be a matter of the method of control system but will be checked
again. The proper operation is to do Calibration is not sure.
b. Connection on water flow for cooling TP on gas target broke off
leading to a flood. It has been fixed.
c. Major blackout during run at ~3am on Sunday. MT was able to get all
units back on but there was a problem with undocumented circuit breaker
on TP control systems. DFOT get it going (with a comb) but this need some
type of documentation on web page ACTION
item
d. FCM bias goes off when closed and it would be good if it was
turned on automatically when FCM is inserted. The same can be said for
FCCH. This needs some attention in EPICS system by RB ACTION
item
e. Pumping on cryopump for ED2 very slow. DFOT mentioned that there
is a serious leak in turbo connection piping and needs fixing..ACTION
item
f. Apparently the various displays for different device operations
sometime appear on the computer behind other displays and hard to know.
JP will fix this part of the video
system.
ACTION item
4. Results from DRAGON 20Ne(p,gamma) study
a. From the prospective of operations, the run was successful as all
experimental objectives were achieved and data obtained. There were some
tuning problems at times but energy changes did go somewhat smoothly.
Beam energies disagree with Prague magnet is a different way now. Slits
needed to be reinstalled at Prague magnet.
b. An initial quick analysis of the results do indicate some possible
problems with some aspects of the data, e.g. energy of the resonance is
off from literature value, and the observed width of resonance may be off
slightly. A more detailed and careful analysis of all data needed
especially given possible problem with Charge Slit as mentioned above.
5. Future Runs
a. CV presented a tentative outline of a game plan for the first 40Ca++
run which will probably happen in either 10 days or later depending upon
on stable beam schedule. See attached for outline and some related
graphs.
Meeting adjourned at 11:35 am
 Â