DRAGON MEETING MINUTES 1st March '04

Present: JDA,MP,ML,LB,DH,JP,MT,JS,GR,PM,CR,DO
Recorder: CR

Also Present (12C+12C group):
David Jenkins, Jose Javier Valiente Dobom, Florent Haas, Paul Paptia,
Robert Glover, Corina Andreoiu.

1. INTROS:

JDA welcomes the team assembled for the 12C+12C experiment and introductions 
to the DRAGON group are made.

2. REPORT ON WEEKEND RUNNING:

MCP tests: Attenuated 21Ne beam was used with the MCP and a scintillator 
at the end of DRAGON (No Gas). ~660 ps FWHM timing resn. achieved.
H2 Gas was added (< 1 Torr limited by new pumping tubes) & 268.9 keV/u 
21Ne used for (p,g) reaction.
22Na and 21Ne separated in timing by 3 ns using this setup.

Catania Monolith: Although detector ran, increasing the bias seemed to 
degrade energy resolution. Using the cooling also seemed to worsen the 
resolution. The MCP-dE timing wasn't very good. All these contra-logical
intricacies need to be understood & fixed.

3. TURNOVER TO 12C BEAM:

DSSSD now in place at DRAGON end (a new detector!). Solid target ladder 
in place. BGO's have been calibrated with 6 MeV source & spectra expanded 
up to 30 MeV full-scale. DAQ & analysis software set up appropriately.
Tuning starting in the afternoon & beam expected by this evening. 

D. Jenkins explains run plan: There are three excitation functions to be 
considered in the 12C(12C,g) reaction, for different final gamma transitions. 
Previous work shows that it is likely that multi-step decay is involved 
in this reaction. It is intended to run on the ~6 MeV (CM) resonance for
one week, which should be a clean transition to the ground state of 24Mg.
It is then intended to look at the ~7 MeV resonance for 1 week, which 
should have a more complicated set of decays. Off resonance runs will
also be performed.

DH: Reminds us that NOVA has the capability to identify the "nearest
neighbour" events in the BGO array due to the scattering of high energy
gamma rays in the crystals, which should help make more sense of multiplicity 
> 1 events.
PAW can be run online, and has sufficient basic spectra for our purposes.
NOVA can be used after each run to sum up the data for runs of the same 
beam energy.

It is also noted that during this experiment, which will be starting with
a beam energy of 1.01 MeV/u, large energy changes should be scheduled for
weekdays when the accelerator experts will be on shift.

JDA will take the visitors to ISAC II building where desks and terminals will
be provided. 

Last weeks minutes were not discussed.

This was the shortest DRAGON meeting on record!