Differences in recording positive and negative ion chemical ionization mass spectra on a quadrupole mass spectrometer are discussed. An analog positive and negative ion electron multiplier detector is described which is well suited for a quadrupole instrument. This detector significantly reduces baseline noise in the negative ion mode and improves positive ion high mass sensitivity.

A new data acquisition system for the high-resolution magnetic spectrometer Lintott at superconducting Darmstadt electron linear accelerator S-DALINAC was developed. It allows inclusive and coincidence scattering experiments with event rates up to 10 kHz.

The goal of the KArlsruhe TRItrium Neutrino (KATRIN) experiment is determination effective electron antineutrino mass with a sensitivity 0.2 eV/c2 at 90 % C.L.1. This can only be achieved very low background level in order 10 mcps2 detector region interest. A possible source are α-decays on inner surface KATRIN Main Spectrometer. Rydberg atoms, produced sputtering processes accompanying α-decay...

The ionization energy spectra and electron momentum distributions of formamide were investigated using the high-resolution electron momentum spectrometer in combination with high level calculations. The observed ionization energy spectra and electron momentum distributions were interpreted using symmetry adapted cluster-configuration interaction theory, outer valence Green function, and DFT-B3L...

Spores from a variety of Bacillus species were analyzed with direct probe mass spectrometry using an electron monochromator to select electrons of distinct energies for ionization. Electron energies were chosen to match the electron capture energies of taxonomically important compounds such as dipicolinic acid and fatty acids. Previous negative ion interferences were not observed when the monoc...

We have studied double photoionization from molecular inner-shell orbitals and investigated the properties of the resultant double core-hole states in molecules, by multielectron coincidence spectroscopy with a magnetic bottle electron spectrometer. A brief summary of our previous studies is presented.

An experiment is proposed to measure the Single Spin Asymmetries of the Semi-Inclusive Deep Inelastic Scattering (SIDIS) process ~n(e, e′π±(K±)), using the large-solid-angle Super Bigbite Spectrometer (SBS), the BigBite Spectrometer, and a novel polarized He target that includes alkali-hybrid optical pumping and convection flow to achieve very high luminosity. Both spectrometer arms will utiliz...

An experiment is proposed to measure the Single Spin Asymmetries of the Semi-Inclusive Deep Inelastic Scattering (SIDIS) process �n(e, e�π±,0(K±)), using the large-solid-angle Super Bigbite Spectrometer (SBS), the BigBite Spectrometer, and a novel polarized He target that includes alkali-hybrid optical pumping and convection flow to achieve very high figureof-merit. Both spectrometer arms will ...

Lignin, an amorphous biopolymer is one of the major components wood. In this study, lignin was extracted from Gmelina arborea wood using Soda and Kraft pulping processes. The characterized Fourier Transformed Infrared Spectrometer (FTIR), UV/visible spectrometer, electrospray ionization mass spectrometer scanning electron microscope (SEM). Results revealed that G. lignins contained several chem...