Minutes of the Meeting 21. October 2002, prepared by SE present:   Dave Hutcheon, Art Olin, John D'Auria, Lothar Buchmann, Dario Gigliotti, Alison Laird, Sabine Engel, Cybele Jewett and Joel Rogers   agenda:   1.       last week's minutes 2.       15O beam production 3.       21Na(p,g) at 212 keV 4.       analysis of 14N(a,g)18F 5.       new power supplies 6.       EEC proposals 7.       collaboration meeting 8.       24Mg(p,g)25Al at 214 keV 9.       business arising   1.       minutes:       Last week's minutes will be summarized and distributed to be discussed next week 2.       14O / 15O beam production: JDA: To investigate the production of 15O for future experiments, tests were done with 14O, which is chemically the same, but can be detected via its characteristic gamma emission.  Suzie Lapi, Tom Ruth and Alex Zyuzin work on a set-up based on the mechanism used in Madison: A proton beam impinges on a H2N2 gas target, thick enough to stop the beam. 14O is produced via 14N(p,n)14O, chemically bound to H2 , extracted and converted to C14O. Beams of 3 1010 at/sec could be produced. Calculating the expected yields for 15O, taking into account differences in the cross section, half life time etc beams of the order of 10^9 at/sec could be fed into the ISAC ECR source. AO raised the question, if a modified version of the Louvain-la-Neuf target could not be used. Whether a new 15O(a,g) proposal should be submitted to the EEC this year or if further studies on 15O production and ECR source performance should be anticipated was discussed. 3.       21Na(p,g) at 212 keV: According to the results shown by Dale Visser in his seminar talk the resonance energy of 212 keV in the 21Na(p,g) regime was reproduced with an error of only 3 keV. As pointed out by LB, the peak observed had a high energy shoulder that might be linked to a new state. This would shift the energy of the lower resonance further down. It was mentioned that the Shawn should be asked to provide a short summary (to avoid the political incorrect term 'spread sheet') of his analysis, indicating the values he used to calculate the resonance strength, since the yield was already double checked with JR's independent analysis. 4.       analysis of 14N(a,g)18F: JR looked at the two acceptable runs done on 14N(a,g) at two different pressures. Cuts on the  time-of-flight and the energy of the coincidence gammas were applied to distinguish the recoils of interest from a huge amount of leaky beam, observed as a two peak structure on the low energy side of the recoils. First attempts were made to calculate a suppression factor that can be used as a guide for the recently proposed 12C(a,g)16O project. For 4.6 Torr a factor of 9x10^-15 was observed, while at 2.2 Torr the leaky beam rejection was stronger by  a factor 100. It was agreed on the final test have to be done with 12C. 5.       new power supplies: The new power supplies to replace the existing ones for MD1/2, Q9 /10 and SX3/4, showed some 60 Hz noise, so that shipping will be delayed until the problem is fixed. The DRAGON will try to be ready for the upcoming TUDA beam time to act as a beam energy measuring station.  6.       EEC proposals: Alan Chen will present a proposal to measure 17F(p,g), LB will focus in 12C(a,g) and AL is working on a plan to measure 8Li(a,ng)11B with an improved TUDA set-up utilizing a gas chamber and possibly the DRAGON BGO array. A more detailed presentation to the DRAGON group is planned for the following week. 7.       collaboration meeting A small and informal collaboration meeting will be held around the time of the EEC and 21Na DRAGON run, while an official version is planned early in 2003 in order to discuss the DRAGON plans for  the upcoming 3 year period. 8.       24Mg(p,g) at 214 keV SE displayed a graph on the recent analysis of 24Mg(p,g) at 214 keV. The energy and yield quoted in earlier publications could be confirmed. 9.       job list: 5 cables will be pulled from the experimental hall to the counting room.