DRAGON MEETING MINUTES 01/08/2006

Present: PM,GR,EoC,JZ,CV,MT,CR(rec),DH

1. Previous minutes accepted.

2. Charge-state distribution paper has been submitted to NIM.

3. Hardware.
        
        o Ceramic tubes for HV are being tested by PM. Doing pressure tests up to 60psi in
DRAGON area.

        o We have 3 tubes altogether.

        o Have been working on same one for 5 days as seems to have a small leak - rises
~1psi/hour.

        o No signs of cracks or fatigue.

        o Tubes are not elastic, and problem could be temperature related.

        o Manufacturers expect payment 30 days from delivery, so if there is a problem we
need to                 diagnose it within ~2 weeks.

4. Acceptance

        o Evan shows slides of y-distribution at mass slits with asymmetry in exp. wrt
simulation.

        o This asymmetry can be reproduced by either a) moving Q1 in sim up 1mm, or b)
moving source in                 sim down by 2mm.

        o Suggests possible gas-target or other misalignment in reality.

        o Problem is in the 'left' direction looking downstream (all other directions agree
fairly well                 with simulation).

        o Need to look up Dave O's numbers for gas-target misalignment see if they make
sense.

        o Suggested to move source up by 2mm in reality to see if the exp. gives same as
'ideal'                 simulation (would immediately diagnose target misalignment).

        o Also suggested that it is time we did a beamline alignment survey of DRAGON. PM
will talk to                 Bruno about this.

5. Student symposium tomorrow, Evan and Joel will talk. We will be there for support.

6. 22Na(p,g)

        o Had mini-meeting last week with DH,CV,MT,CR,GR.

        o Some new ideas for chamber design presented.

        o Chamber will have cooling shroud inside - target will not see any 'warm' surfaces.

        o CR will take existing drawing of ISAC box chamber and add design ideas.

        o MT believes NaOH will be formed by mobile Na.

        o Dave H circulated note about precision issues etc: ideas needed to determine
density 
        distribution of implanted Na. Rutherford backscattering suggested?

        o Very soon need a written procedure for performing the experiment.

7. Other
        
        o Gotz talked about Rolfs article in 'Physics World'. 

        o He has drafted 'mini-proposal' letter to JMP asking for time and means to do a
cryogenic
        22Na lifetime experiment.

        o CR has extension on 26Al article for NICIX - 10th August.