Duo : Bassoon studio recital

Philipp Friedrich BoddeckerMichel Joseph GebauerGiovanni Antonio BertoliPaul HindemithIgor StravinskyTadd RussoWesley PittmanAlan HovhanessHeitor Villa-LobosFranz TauschEric Ewaze

Inelastic Proton Scattering at Intermediate Energies to Giant Resonances

Supported by the National Science Foundation and Indiana Universit

Giant Resonance Excitation with 115 MeV Protons

This work was supported by National Science Foundation Grants PHY 76-84033A01, PHY 78-22774, and Indiana Universit

Anomalous charge state distribution in ECRIS for oxygen isotopes

The performance of the KVI ECRIS-2 for a mixture of O-18, O-17, and O-16 isotopes is-as expected-very much the same as for natural oxygen gas, i.e., the sum of the currents of given charge states of the isotopes equals that of the same charge state of the natural oxygen. However, it is found that the ratios of currents O-18q+/O-17q+ and O-18q+/O-16q+ increase with q. New measurements on ECRIS-1 (Minimafios) at KVI confirm this anomalous charge state distribution. This effect is also present when nitrogen or argon gas is mixed into the plasma. However, when applying helium as a mixing gas, the anomaly disappears. An explanation in terms of ion cooling (here transfer of kinetic energy to, in particular, the light species) seems valid

Review of the Eleventh International Workshop on ECR ion sources

At the Workshop, the operation of various new and existing ECR ion sources was reported, with most of the emphasis on new methods to improve the performance and extend the variety of species. Much attention was paid to theoretical aspects, in particular to the basic question of electron heating; a complete investigation is still considered to be a long term project. A number of measurements of diagnostic character were presented. The strong radial component of the field in the magnetic trap turns out to play a crucial role in the confinement of hot electrons and hence in the production of very high charge state ion beams. A donor for cold electrons in any form-like a biased probe, plasma cathode, or electron gun-contributes strongly to increased output and stability of operation of the ECR ion source