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The Lund Nuclear Microprobe sub-micron set-up. Part I: Ion optics calculation

Shariff, Asad LU ; Auzelyte, Vaida LU ; Elfman, Mikael LU ; Kristiansson, Per LU ; Malmqvist, Klas LU ; Nilsson, Christer LU ; Pallon, Jan LU and Wegdén, Marie LU (2005) In Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms 231(1-4). p.1-6
Abstract
A new beam line for generating a sub-micron beam spot for high-resolution nuclear microprobe applications has been constructed at the Lund nuclear microprobe facility. In this paper, the first in a series of three, a detailed theoretical investigation of different focusing systems is presented based on calculations performed with the computer programs PRAM and OXTRACE. Comparison is made between a doublet, a triplet, a quadruplet and a split quadruplet (two-stage focusing). For the split quadruplet all four quadrupole magnets were uncoupled. The conclusion from the calculations was that to obtain the smallest possible beam, the two-stage focusing system should be used. Such a focusing system (a doublet at each stage) has been chosen for... (More)
A new beam line for generating a sub-micron beam spot for high-resolution nuclear microprobe applications has been constructed at the Lund nuclear microprobe facility. In this paper, the first in a series of three, a detailed theoretical investigation of different focusing systems is presented based on calculations performed with the computer programs PRAM and OXTRACE. Comparison is made between a doublet, a triplet, a quadruplet and a split quadruplet (two-stage focusing). For the split quadruplet all four quadrupole magnets were uncoupled. The conclusion from the calculations was that to obtain the smallest possible beam, the two-stage focusing system should be used. Such a focusing system (a doublet at each stage) has been chosen for the new sub-micron set-up at the Lund NMP laboratory. The first stage focuses the beam in an intermediate chamber, which has a high-resolution optical viewing system facilitating more control over the beam spot. This real image of the first stage is then used as a virtual object for the second stage. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
PRAM, ion optics, OXTRACE, nuclear microprobe, sub-micron beam
in
Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
volume
231
issue
1-4
pages
1 - 6
publisher
Elsevier
external identifiers
  • wos:000229752400002
  • scopus:33644550655
ISSN
0168-583X
DOI
10.1016/j.nimb.2005.01.026
language
English
LU publication?
yes
id
43789ea3-af5f-471b-b252-a580298ebd57 (old id 236012)
date added to LUP
2007-10-05 14:23:27
date last changed
2017-09-10 04:29:45
@article{43789ea3-af5f-471b-b252-a580298ebd57,
  abstract     = {A new beam line for generating a sub-micron beam spot for high-resolution nuclear microprobe applications has been constructed at the Lund nuclear microprobe facility. In this paper, the first in a series of three, a detailed theoretical investigation of different focusing systems is presented based on calculations performed with the computer programs PRAM and OXTRACE. Comparison is made between a doublet, a triplet, a quadruplet and a split quadruplet (two-stage focusing). For the split quadruplet all four quadrupole magnets were uncoupled. The conclusion from the calculations was that to obtain the smallest possible beam, the two-stage focusing system should be used. Such a focusing system (a doublet at each stage) has been chosen for the new sub-micron set-up at the Lund NMP laboratory. The first stage focuses the beam in an intermediate chamber, which has a high-resolution optical viewing system facilitating more control over the beam spot. This real image of the first stage is then used as a virtual object for the second stage.},
  author       = {Shariff, Asad and Auzelyte, Vaida and Elfman, Mikael and Kristiansson, Per and Malmqvist, Klas and Nilsson, Christer and Pallon, Jan and Wegdén, Marie},
  issn         = {0168-583X},
  keyword      = {PRAM,ion optics,OXTRACE,nuclear microprobe,sub-micron beam},
  language     = {eng},
  number       = {1-4},
  pages        = {1--6},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms},
  title        = {The Lund Nuclear Microprobe sub-micron set-up. Part I: Ion optics calculation},
  url          = {http://dx.doi.org/10.1016/j.nimb.2005.01.026},
  volume       = {231},
  year         = {2005},
}