It is shown that the efficiency of ion acceleration in plasma-filled gaps with magnetic cusps is rather high. For the purpose of developing high-current ion beam diagnostics, the excitation of ...acoustic waves by proton beams is investigated.
Whether tetra‐tert‐butyl‐s‐indacene is a symmetric D2h structure or a bond‐alternating C2h structure remains a standing puzzle. Close agreement between experimental and computed proton chemical ...shifts based on minima structures optimized at the M06‐2X, ωB97X‐D, and M11 levels confirm a bond‐localized C2h symmetry, which is consistent with the expected strong antiaromaticity of TtB‐s‐indacene.
The structure of tetra‐tert‐butyl‐s‐indacene is a computational challenge. Highly correlated methods and popular DFT functionals predict a bond‐delocalized D2h symmetry, but excellent agreement between experimental and computed proton chemical shifts suggests a true C2h geometry.
Investigations of the system of general and regional hemostasis in patients with diabetes mellitus and the IVth degree of ischemia of lower extremities have established the development of chronic ...hypercoagulation-thrombotic forms of disseminated intravascular blood coagulability. Prophylactics of thrombotic complications allows to avoid high amputations in 80% of the patients, to make only necrectomies, small amputations and dermoplasty.
The prototype induction linac under study for space-charge-neutralized beams, comprising an injector and two induction stages with magnetoinsulated cusps in the accelerating gaps, enabled effective ...postacceleration of the ion beam by an induction electric field. The extracted beam parameters were: 2 kA, 500 keV, 0.5 s. For axially symmetric systems, a new mechanism of ion beam neutralization in the accelerating gap is proposed. Detailed consideration is given for two most dangerous instabilities disturbing effective ion beam transport along the accelerator channel and the drift chamber. The ion beam filamentation was observed in our experiments.
