A rotatable electron spectrometer for multicoincidence experiments
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala (Sweden)
- VGScienta, Vallongatan 1, SE-750 15 Uppsala (Sweden)
- MAX-lab, Lund University, P.O. Box 118, SE-221 00 Lund (Sweden)
We have developed a rotatable hemispherical spectrometer with good energy and angular resolution, which can be positioned with the lens axis arbitrarily within a solid angle of 1 {pi}. The collection angle of the emitted electrons with respect to the polarization axis of the light is set by means of a three-axes goniometer, operating under vacuum. An important requirement for this setup was the possibility to perform coincidences between the electron analyzed by the spectrometer and one or several other particles, such as ions, electrons, or photons. The lens system and the hemispheres have been designed to accommodate such experimental demands, regarding parameters such as the resolving power, the acceptance angle, or the width of the kinetic energy window which can be recorded for a given pass energy. We have chosen to detect the impact position of the electron at the focal plane of the hemispherical analyzer with a delay line detector and a time-to-digital converter as acquisition card rather than using a conventional charge-coupled device camera.
- OSTI ID:
- 22053754
- Journal Information:
- Review of Scientific Instruments, Vol. 81, Issue 6; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigations of substitutional impurity segregation to the {Sigma}5(310)/[001] STGB in FCC metals: a EFTEM and HRTEM study
A refocusing modified velocity map imaging electron/ion spectrometer adapted to synchrotron radiation studies