## Welcome
to the homepage of

Theo J.M. Zouros

**ZERO-DEGREE
AUGER SPECTROSCOPY**

**of HIGHLY CHARGED PROJECTILE IONS**

**Above: a view of the University of
Crete experimental setup**

**at the 7 MV tandem accelerator facility at Kansas State University**

On the left can be seen the experimental
setup including collision chamber and beamline, housing the new zero-degree hemispherical
spectrograph. In the front former University of Crete graduate student
(PhD 2001) Manolis Benis (on the
right) and Prof. Theo Zouros.

**Electron orbits in a Hemispherical
Deflector Analyser**

3D schematic of an
electron orbit in a hemispherical spectrometer designed with Mathematica. The
definition of the trajectory angles á
and â are clearly shown as well as the plane of
the orbit. In this picture **á=-30**^{o} and **â=-50**^{o}
Particle enters spectrometer at point P and exits at point M after going
through a deflection of 180 degrees. The XYZ-frame is the fixed spectrometer
frame, while the xyz-frame is the relative trajectory frame. Both Z- and z-
axes are always parallel. The short dark line starting at O is the eccentricity
vector å which is conserved.

Trajectory of above electron (red line) is part of an
ellipse. The bold arrow along the x0 axis is the eccentricity vector **å**,
which is conserved. The two black circles are the inner and outer radii of the
analyzer. The arrow pointing to the red dot is the position vector, while the
arrow pointing away from the red dot and tangent to the ellipse is the velocity
vector.