Ion source using scattering effect at magnetic neutral point.

Plasma ion source for in situ ion bombardment in a soft x-ray magnetic scattering diffractometer.

A new plasma ion source for in situ keV He ion bombardment of solid state samples or thin films was designed and built for ion fluences between 1 × 10(12) and 1 × 10(17) ions/cm(2). The system was designed to be mounted to different diffraction chambers for soft x-ray resonant magnetic scattering. Without breaking the vacuum due to He-ion bombardment, structural and magnetic modifications of th...

Space Vecor Modulated Three Level Neutral Point Clamped Inverter Using A Single Z Source Network

The Neutral Point Clamped (NPC) three-level inverter with Z-source network is a relatively recent converter topology that exhibits both voltage-buck and voltage-boost capability. This concept can be applied to all acto-ac, dc-to-dc, ac-to-dc, and dc-to-ac power conversion whether two-level or multilevel. However, multilevel inverters offer many benefits for higher power applications. Existing p...

Ion Beam Measurements at the Superconducting ECR Ion Source SECRAL

A Point-source Method in Inverse Acoustic Scattering

We present a point-source method to solve inverse acoustic obstacle scattering problems. The point-source method gives a new and explicit procedure how to compute from the far eld pattern u 1 of a scattered eld an approximation for the total acoustic eld u near the unknown obstacle. The point-source method then searches for the boundary of the obstacle as a zero-curve of u or @u @ , respectivel...

A Point-source Method in Inverse Electromagnetic Scattering

We present the mathematical foundation for a point-source method PSM to solve inverse electromagnetic perfect-conductor obstacle scattering problems. The PSM gives a new and explicit procedure how to compute locally from the far eld pattern E 1 an approximation for the total electric eld E near the unknown obstacle. The PSM then searches for the boundary of the obstacle as a zero-curve of p E w...