Minutes of DRAGON meeting of Tuesday, 19th August 2003

Present:  Aaron Bebington (AB), Ahmed Hussein (AH), Art Olin (AO), 
Barry avids (BD), Cassi Galt (CG), Cybele Jewett (CJ), Chris Ruiz (CR), 
Dario Gigliotti (DG), Dve Hutcheon (DAH), Dave Ottewell (DFOT), 
John D'Auria (JDA), Joel Rogers (JR), Mike Anderson (MA), Mike Lamey (ML), 
Marcello Pavid (MP), Zhihong Li (ZL), Recorder.

Agenda:

1. Corrections to Previous Minutes:
-in the second paragraph of Simulation Calculations Section, gammas should 
be replaced with word, recoils.

2. Hardware status
-solid target system 
DAH  Heinz and Hart said they almost finished fixing the problem of the 
interference with the gamma array support structure and need some time to install it and 
make sure it does work. 

ML showed his measurement results from using the DSSSD and MCP with both 148Gd alpha source
(Run 8057) and 20Ne(10+) beam at the energy of 1.46 MeV/u (Run 8502). The figures 
and spectrums are included in mcp.pdf and ml.pdf. Note: the DSSSD seems to have
been seriously effected and may need to be replaced. 

3. Optics of DRAGON
JR continues his studies on using GIOS to achieve an acceptable tune  to 
avoid the acceptance loss of 16O 
recoils in the 12C(a, g)16O reactions. The broad accept envelope parameter 
can be read from GIOS output file. The calculation results of 12C(a, g)16O 
reaction at the Ecm = 1 MeV ( DŁ˝ 5.6 %, A = 27 mrad) shows that the beam loss 
point change from Q5, ED1,ED2 into Q9 by tuning the ratio of fields. The ratio 
value of Q5 affects the accept envelope in the second stage. The beam loss points 
can be found by the simulation. He will continue doing these optics calculations
and also asses how best to use a beam to study the final acceptable 
tune experimentally. See jr.pd for the input and output file f.

DAH shows the new designed collimator tube which would go downstream and 
has an larger opening. See dah.pdf.

4. Data Analysis System Changes
AO presented a report on the fact that the TRIUMF DAQ group will no longer support 
NOVA since Peter Green's retirement. They plan to replace NOVA with ROOT.
ROOT is a physics display and analysis tool developed by CERN, its scripting language 
is interactive C++, and is much more powerful than PAW.  DAQ group will provide technical 
support for ROOT and it has been adopted by other ISAC groups. The implementation 
strategy and the change steps were also introduced. DRAGON probably should adopt it also.
See dragonroot.pdf for more information.

5. AOB
JDA gives the information about searching for Post Doctor Fellow. An  experimental 
study of levels in Mg22 will be done in TRIUMF using a He3,p reaction at TUDA 
or elsewhere (ANL, ORNL using heavy ion reactions and Ge gamma arrays).