Peter Schury edited section_Plan_for_use_of__.tex  over 8 years ago

Commit id: b4df65a2a78cd32cb379fe6338cb241694950e02

deletions | additions      

       

Unfortunately, the initial commissioning of the system was more difficult and time-consuming than initially supposed. While we have succeeded in the preliminary commissioning, including several actinide atomic mass measurements, doing so required the use of nearly all the initially assigned machine time. However, at the same time, the commissioning proved that we can simultaneously measure several isotopes, providing a new option for efficient use of future machine time. Additionally, the development of projectile beams of Ti and Cr give us the ability to extend our initial area of interest up to isotopes of Sg.  \subsection{Isotopes to be produced with $^{40}$Ar beams}  We still require some machine time with a $^{40}$Ar beam. We will need some time to make an online verification of improvements in recapture in the second trap system using the well-studied $^{205}$Fr and $^{201}$At. We will also need this beam for study of neutron-deficient Fm produced via $^{208}$Pb($^{40}$Ar, $x$n)$^{248-x}$Fm. However, we must increase the efficiency of recapturing ion pulses in the second trap to perform meaningful mass measurements of $^{244, 245)$Fm 245}$Fm  in a reasonable time. \subsection{Isotopes to be produced with $^{48}$Ca beams}  As in our original proposal, we plan to utilize a $^{48}$Ca beam for production of Md, No and Lr isotopes near $N$=152. The isotopes we wish to study are shown in yellow in Fig.~\ref{figN152Isotopes}. Even with the efficiency seen thus far, for most of these isotopes we can make meaningful mass measurements within 1 week of machine time. This will be discussed in more detail in the following section.