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240620s2024 xx |||||o 00| ||eng c |
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|a 10.1107/S1600577524003540
|2 doi
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|a pubmed24n1463.xml
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|a (DE-627)NLM373884362
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|a (NLM)38900457
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Tkach, O
|e verfasserin
|4 aut
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|a Asymmetric electrostatic dodecapole
|b compact bandpass filter with low aberrations for momentum microscopy
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 07.07.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a open access.
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|a Imaging energy filters in photoelectron microscopes and momentum microscopes use spherical fields with deflection angles of 90°, 180° and even 2 × 180°. These instruments are optimized for high energy resolution, and exhibit image aberrations when operated in high transmission mode at medium energy resolution. Here, a new approach is presented for bandpass-filtered imaging in real or reciprocal space using an electrostatic dodecapole with an asymmetric electrode array. In addition to energy-dispersive beam deflection, this multipole allows aberration correction up to the third order. Here, its use is described as a bandpass prefilter in a time-of-flight momentum microscope at the hard X-ray beamline P22 of PETRA III. The entire instrument is housed in a straight vacuum tube because the deflection angle is only 4° and the beam displacement in the filter is only ∼8 mm. The multipole is framed by transfer lenses in the entrance and exit branches. Two sets of 16 different-sized entrance and exit apertures on piezomotor-driven mounts allow selection of the desired bandpass. For pass energies between 100 and 1400 eV and slit widths between 0.5 and 4 mm, the transmitted kinetic energy intervals are between 10 eV and a few hundred electronvolts (full width at half-maximum). The filter eliminates all higher or lower energy signals outside the selected bandpass, significantly improving the signal-to-background ratio in the time-of-flight analyzer
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|a Journal Article
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|a HARPES
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|a bandpass prefilters
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|a dodecapoles
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|a hard X-ray angle-resolved photoelectron spectroscopy
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|a momentum microscopy
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|a photoelectron diffraction
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1 |
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|a Chernov, S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Babenkov, S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lytvynenko, Y
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fedchenko, O
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Medjanik, K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Vasilyev, D
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gloskowskii, A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schlueter, C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Elmers, H J
|e verfasserin
|4 aut
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| 700 |
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|a Schönhense, G
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Journal of synchrotron radiation
|d 1994
|g 31(2024), Pt 4 vom: 01. Juli, Seite 829-840
|w (DE-627)NLM09824129X
|x 1600-5775
|7 nnns
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| 773 |
1 |
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|g volume:31
|g year:2024
|g number:Pt 4
|g day:01
|g month:07
|g pages:829-840
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| 856 |
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|u http://dx.doi.org/10.1107/S1600577524003540
|3 Volltext
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|a GBV_ILN_2005
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|a AR
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|d 31
|j 2024
|e Pt 4
|b 01
|c 07
|h 829-840
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