Minutes of DRAGON Meeting for April 9, 2002

Present: JR, AC, DO, DH, MC, CW, AO, UG, PM, DG(recorder)

1) Previous Minutes

-item 2 had a misspell in "initial"
-item 3 had a misspell in "discrepancy"

2) Status of Beam

-2nA available, 5+ Ne, right now
-problems with the ion source persist
-cyclotron beam delivered late Thursday or Friday

3) DRAGON Status 

-key transfer for fence locks is in place
	-procedure is that all keys should be in the box and then the master key
	is to be taken to operations
-MCP documentation is prepared and is available in the DRAGON binders
-MCP motor control testing is to be done
-Target and Vacuum are ready
-Electronics
	-JR is looking into pulse shape discriminating for betas in the elastics
	-tests need to be carried out with RIB
-Q10 power supply has been switched back to the one in which the reading is off
by 40%. 
	-current values need to be adjusted accordingly

4) Beam Time Run Plan 

See Email Sent out by DH on April 8 titled : "Draft DRAGON run plan for April"
	-following are corrections and main points
	
Na21 (822 keV)

-determine thickness of target
-measure resonance width and determine if resonance curve is Breit Weigner or
exotic
-outer points may need to be determined later depending on how the shape is
appearing (eg 875 or 880?)
-2 hours runs will be sufficient for this energy
-gamma coincidences will be recorded for all runs this time

Na21 (212 keV)

-determine thickness of target
-when checking the elastic monitor thresholds be sure to only make changes to
the thresholds using the the Tenelec discriminator NOT the amplifier
-slits could be left all the way open because gamma coincidences are to be taken
and resulting suppression will already be high enough

Na21 (330 keV)

-energy expected at 335keV and energy asked for should be 361 keV
-the pumps need to be observed (eg. rpms) for undesireable running
characteritics when used at the higher pressure of 9.5 Torr

Misc Points

-beam should be centred before changing to smaller apertures
-an energy of 276 keV should be asked for and our settings and results for
previous runs should be cross calibrated
-continue to run with buncher off
-proposal by DH to do proton acceptance by seperator using Rutherford scattering
-pedestals and discriminators should be set as low as possible

5) Other Business

-paw backing store on new isdaq machines OS's has been turned on
-PS viewer available on isdaq's is the kde ps viewer called "kghostview"
-Netscape Midas interface to midmes01 was not connecting as of today