skip to main content

Title: A transverse electron target for heavy ion storage rings

Electron-ion interaction processes are of fundamental interest for several research fields like atomic and astrophysics as well as plasma applications. To address this topic, a transverse electron target based on the crossed beam technique was designed and constructed for the application in storage rings. Using a sheet beam of free electrons in crossed beam geometry promises a good energy resolution and gives access to the interaction region for spectroscopy. The produced electron beam has a length of 10 cm in ion beam direction and a width in the transverse plane of 5 mm. Therewith, electron densities of up to 10{sup 9} electrons/cm{sup 3} are reachable in the interaction region. The target allows the adjustment of the electron beam current and energy in the region of several 10 eV to a few keV. Simulations have been performed regarding the energy resolution for electron-ion collisions and its influence on spectroscopic measurements. Also, the effect on ion-beam optics due to the space charge of the electron beam was investigated. Presently the electron target is integrated into a test bench to evaluate its performance for its dedicated installation at the storage rings of the FAIR facility. Therefore, optical diagnostics of the interaction region andmore » charge state analysis with a magnetic spectrometer is used. Subsequently, the target will be installed temporarily at the Frankfurt Low-Energy Storage Ring (FLSR) for further test measurements.« less
Authors:
;  [1] ;  [2]
  1. Institute of Applied Physics, Goethe University Frankfurt, Frankfurt am Main, HE (Germany)
  2. GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, HE (Germany)
Publication Date:
OSTI Identifier:
22390858
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1640; Journal Issue: 1; Conference: 12. International Symposium on Electron Beam Ion Sources and Traps, East Lansing, MI (United States), 18-21 May 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM OPTICS; CHARGE STATES; COLLIDING BEAMS; COMPUTERIZED SIMULATION; ELECTRON BEAMS; ELECTRON DENSITY; ELECTRON-ION COLLISIONS; ELECTRONS; ENERGY RESOLUTION; HEAVY IONS; KEV RANGE; MAGNETIC SPECTROMETERS; SPACE CHARGE; STORAGE RINGS