From dauria@sfu.ca Wed Jan  8 08:54:36 2003
Date: Tue, 07 Jan 2003 20:01:12 -0800
From: John D'Auria <dauria@sfu.ca>
To: Internal:  ;
Subject: DRAGON minutes 07-01-03

DRAGON Meeting Minutes for Jan 7th, 2003

Present: JR, AB(new), KN(new), AL, SB(late), SE, LB, DH, JDA, CW(scribe),
DO, PM, AO

1. Happy New Year!  Welcome back, and welcome to new students Aaron
Bebington (Surrey) and Kathryn Neish (UBC).

2. JDA: PRL paper has been submitted.

3. JR is working on a new method of determining the energy of a resonance.
Namely, using the Z-mask (to determine the position of the center of the 
resonance in
the gas target), and the known energy loss in the gas target.  Two possible 
methods
of resonance position determination will be examined: 1) fitting a constrained
Gaussian curve to the Z-mask spectrum, or 2) determining the mean position 
in the
Z-mask spectrum.  This method will be particularly useful for resonance 
energy determination
when a full resonance scan is not performed.  The accuracy of the method is 
limited
by statistics rather than systematics.  More next week.

SE pointed out that stable beam runs have indicated a non-linear 
relationship between resonance position and beam energy in the flat portion 
of the gas target pressure profile.  She will present figures next week.

4. DH: Magnetic dipole power supplies should be up and running in 2 weeks. 
Water cooling not needed!

5. DH: Beam profile monitor consisting of 48 horizontal wires and 28 
vertical wires,
1mm wide each and 2mm apart has been constructed by Heinz.  It will be 
located in
the charge slit box in front of the charge slits and will aid in beam tuning.

6. PM, DO: A computer will be put in place to serve the CCD camera. More 
next week.

7. DO; An automatic high voltage conditioning program should be trivial 
according to Rolf K.

8. LB wants a non-intercepting beam current measure at the mass slits for 12C
experiments to provide greater precision measurements than FC4 or the 
elastic monitors.  A future presentation from LB outlining motivation 
(quantitatively) and proposed hardware was requested by JDA.

9. DH will discuss solid (graphite) target options next week.

10. CW presented motivation for top-mounted DSSSD cooling at the DRAGON
end-station. It will allow better positioning of the DSSSD and better 
accessibility to feed-throughs.

11. Beam Requests: UG has requested 19Ne beam and JDA/JK have
requested 13N beams  for next beam period, 2003.  Stable beam may be 
available as early as Feb. 15.

12. Two papers upcoming: 1) Commissioning (SE et al.),   2) 21Na(p,g): "The 
Other
Resonances" (JDA/SB et al.).

13. AO displayed the TWIST website which opened a discussion on features that
may be desirable/undesirable for the forthcoming DRAGON website.  DRAGON's
website will be constructed by KN.  It was decided that lin01 will be used 
as the server for the site. 

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