eprintid: 2977
rev_number: 8
eprint_status: archive
userid: 1
dir: disk0/00/00/29/77
datestamp: 2002-10-24 00:00:00
lastmod: 2014-04-03 11:40:16
status_changed: 2012-08-14 15:03:36
type: doctoralThesis
metadata_visibility: show
creators_name: Witte, Peter Daniel
title: An Electron Target for Collision Experiments with Trapped Ions
title_de: Ein Elektonentarget fuer Stossexperimente mit gespeicherten Ionen
ispublished: pub
subjects: ddc-530
divisions: i-851340
adv_faculty: af-13
keywords: electrostatic ion trap , electron target , electron-ion collisions
cterms_swd: Elektron-Molekül-Stoß
cterms_swd: Ionenfalle
cterms_swd: Elektronenstrahl
abstract_translated_text: An Electron Target for Collision Experiment with Trapped Ions An experiment to study electron collisions on stored molecular ions has been  built within the framework of this thesis. Ions are stored in a trap with a  kinetic energy of several keV between two electrostatic mirrors. The stored  ions are crossed at right angle by the low-energy (5-50 eV) electron beam.  With this setup, both a relaxation of internal excitation of the molecular  ion and an efficient detection of fragments can be achieved. An additional  advantage is that the ion trapping field as well as the electron guiding field  are electrostatic only, and thus  no limitation on the mass of the stored ion  is imposed. Experiments on very heavy clusters become accessible. Based on simulations, an electron target was designed and constructed to  provide the necessary electron beam. Upon first test measurements, the  electron target  was installed into an existing ion trap at the Weizmann  Institute of Science. After commissioning and functioning tests, first  measurements on electron collision processes were performed for positive  (Ar+ und CO+) and negative ions (C-, B- and C2-) that show the operativeness  of this new experimental approach. 
abstract_translated_lang: eng
class_scheme: pacs
class_labels: 34.80.H
date: 2002
date_type: published
id_scheme: DOI
id_number: 10.11588/heidok.00002977
ppn_swb: 1643348787
own_urn: urn:nbn:de:bsz:16-opus-29776
date_accepted: 2002-10-16
advisor: HASH(0x55fc36c27068)
language: eng
bibsort: WITTEPETERANELECTRON2002
full_text_status: public
citation:   Witte, Peter Daniel  (2002) An Electron Target for Collision Experiments with Trapped Ions.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/2977/1/phd.pdf