The hemispherical deflector analyser revisited. I. Motion in the ideal 1/r potential, generalized entry conditions, Kepler orbits and spectrometer basic equation

TJM Zouros, EP Benis - Journal of Electron Spectroscopy and Related …, 2002 - Elsevier
We re-examine the orbits of non-relativistic charged particles in a hemispherical deflector
analyser (HDA) assuming an ideal 1/r potential. The particles start their trajectory within the …

Absolute detection efficiencies of low energy H, H−, H+, H2+ and H3+ incident on a multichannel plate detector

BL Peko, TM Stephen - Nuclear Instruments and Methods in Physics …, 2000 - Elsevier
Measured absolute detection efficiencies are presented for H, H− and Hn+ (n= 1, 2, 3)
impacting a commercially available, dual multichannel plate (MCP) electron multiplier at …

Atomic physics with accelerators: Projectile electron spectroscopy (APAPES)

I Madesis, A Dimitriou, A Laoutaris… - Journal of Physics …, 2015 - iopscience.iop.org
The new research initiative APAPES (http://apapes. physics. uoc. gr/) has already
established a new experimental station with a beam line dedicated for atomic collisions …

The hemispherical deflector analyser revisited: II. Electron-optical properties

EP Benis, TJM Zouros - Journal of Electron Spectroscopy and Related …, 2008 - Elsevier
Using the basic spectrometer trajectory equation for motion in an ideal 1/r potential derived
in Eq.(101) of part I [TJM Zouros, EP Benis, J. Electron Spectrosc. Relat. Phenom. 125 …

Determination of the solid angle and response function of a hemispherical spectrograph with injection lens for Auger electrons emitted from long lived projectile states

S Doukas, I Madesis, A Dimitriou, A Laoutaris… - Review of Scientific …, 2015 - pubs.aip.org
We present SIMION 8.1 Monte Carlo type simulations of the response function and detection
solid angle for long lived Auger states (lifetime τ∼ 10− 9− 10− 5 s) recorded by a …

Improving the energy resolution of a hemispherical spectrograph using a paracentric entry at a non-zero potential

EP Benis, TJM Zouros - Nuclear Instruments and Methods in Physics …, 2000 - Elsevier
We demonstrate by ray tracing analysis that the focusing properties of a hemispherical
spectrograph depend critically on the placement of the electron entrance position R 0 and …

Elastic resonant and nonresonant differential scattering of quasifree electrons from and ions

EP Benis, TJM Zouros, TW Gorczyca, AD González… - Physical Review A …, 2004 - APS
High-resolution doubly differential cross-section measurements and calculations for
quasifree electrons elastically scattered through 180° from ground-state He-and H-like …

Technique for the determination of the metastable fraction in two-electron ion beams

EP Benis, M Zamkov, P Richard, TJM Zouros - Physical Review A, 2002 - APS
An experimental technique for the determination of the metastable 1 s 2 s 3 S fraction f of two-
electron ion beams is reported. The method utilizes the electron yields of the 1 s 2 p 2 2 D …

Fringing field optimization of hemispherical deflector analyzers using BEM and FDM

O Sise, M Ulu, M Dogan, G Martinez… - Journal of Electron …, 2010 - Elsevier
In this paper we present numerical modeling results for fringing field optimization of
hemispherical deflector analyzers (HDAs), simulated using boundary-element and finite …

Ion trap charge detection mass spectrometry: Lowering limits of detection and improving signal to noise

NC Contino - 2013 - search.proquest.com
Mass spectrometry has come a long way since its early days of measuring the mass of
electrons, protons, and isotopes. With the advent of electrospray ionization, the world of …