DRAGON meeting minutes February 15th, 2005

meeting starts at 10:32am 
present: 	JDA,CR,MH,AH,Wolf,JP,AO,PM,LB,CV,JC(recorder),DH,DO

students:

LB has a student coming beginning of April. Anuj Parikh is coming from Yale 
to take on 26Al(p,g) as part of his thesis projects...
summer students: We have confirmation of three summer students.

hardware:  

ED2's turbomolecular pump bearings wore out due to lack of protection 
(backing pressure ~2 Torr) as a result of switching to backing tank not 
having backing pump. Should be repaired soon, and protection will be 
established via a backing pressure trip point.

ED1:  199.something this morning. seems fickle, shuts itself off when DH 
not around. 

Controls: Change to "isacepics1" "seems ok". scaling files now accessible, 
communication not checked. 

Detectors: start with IC in march, because CV wants to test support meshes 
for DLC foils for use with MCP. Start with DSSSD for 26Al(p,g), and 
confirmed that we have a good DSSSD to use for that experiment. Another 
DSSSD will be ordered. In order to honestly evaluate detectors required 
for summer campaigns, possibilities will be discussed at next week's DRAGON 
meeting. 

Back to meshes: Discussion of measurement of transmission of meshes: light, 
alpha-source, strong resonance. No consensus, but agreement that 
transmission measurement was important.

GEANT:

Catalin sent CR files. CR and AO will check over, then give files to LB for 
12C(a,g) analysis...

LB sends Catalin data files from 12C(a,g) to analyze

Beam Schedule:

DH shows "tentative" schedule.  Wobbler missing, but probably in August...
12C(a,g) needs wobbler to publish.
Discussion about 20Ne(p,g): need to confirm result because first measurement 
was done when we had little experience operating DRAGON. Publication will 
result. 

CV shows new excel spreadsheet that can be used to compare actual tune with 
calculated tune. Spreadsheet highlights equipment limitations. See figure 
for example with purposely unrealistic choice of recoil and charge state 
to highlight limitation feature.

23Na implantation: need safety approval and yet another beam request... 
AO won't help because of refusal to go to US, but otherwise everyone is 
helping.  LB brought up some valid concerns, the most important being the 
length of time to characterize the 23Na targets, and carbon deposits on 
the targets. 

Mark Huyse presents Search for 11Li beta-delayed charged particle decay. 
E1030 (see the attached presentation). Need 200 11Li/second @ 15 MeV. 
Detector is 78um thick, 15 MeV implantation depth is 40um. Concerns were 
raised about blasting the (only) DSSD with too much (stable pilot) beam 
and killing it before the experiment is even started.  Necessary precautions 
will be taken.

meeting adjourned at 11:51am.