Search: onr:"swepub:oai:DiVA.org:uu-456227" >
Suppression of the ...
Suppression of the vacuum space-charge effect in fs-photoemission by a retarding electrostatic front lens
-
- Schönhense, G. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Kutnyakhov, D. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Pressacco, F. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
show more...
-
- Heber, M. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Wind, N. (author)
- Univ Hamburg, Inst Experimentalphys, D-22761 Hamburg, Germany.
-
- Agustsson, S. Y. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Babenkov, S. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Vasilyev, D. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Fedchenko, O. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Chernov, S. (author)
- SUNY Stony Brook, Dept Chem, New York, NY 11790 USA.;SUNY Stony Brook, Dept Phys, New York, NY 11790 USA.
-
- Rettig, L. (author)
- Fritz Haber Inst Max Planck Gesell, D-14195 Berlin, Germany.
-
- Schönhense, B. (author)
- Imperial Coll London, Dept Bioengn, South Kensington Campus, London SW7 2AZ, England.
-
- Wenthaus, L. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Brenner, G. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Dziarzhytski, S. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Palutke, S. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Mahatha, S. K. (author)
- Deutsch Elektronen Synchrotron DESY, Ruprecht Haensel Lab, D-22607 Hamburg, Germany.
-
- Schirmel, N. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Redlin, H. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Manschwetus, B. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Hartl, I (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Matveyev, Yu (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Gloskovskii, A. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Schlueter, C. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Shokeen, Vishal (author)
- Uppsala universitet,FREIA
-
- Dürr, Hermann (author)
- Uppsala universitet,FREIA
-
- Allison, T. K. (author)
- SUNY Stony Brook, Dept Chem, New York, NY 11790 USA.;SUNY Stony Brook, Dept Phys, New York, NY 11790 USA.
-
- Beye, M. (author)
- Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
-
- Rossnagel, K. (author)
- Deutsch Elektronen Synchrotron DESY, Ruprecht Haensel Lab, D-22607 Hamburg, Germany.;Christian Albrechts Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany.
-
- Elmers, H. J. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
- Medjanik, K. (author)
- Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
-
show less...
-
Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany. (creator_code:org_t)
- American Institute of Physics (AIP), 2021
- 2021
- English.
-
In: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 92:5
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- The performance of time-resolved photoemission experiments at fs-pulsed photon sources is ultimately limited by the e-e Coulomb interaction, downgrading energy and momentum resolution. Here, we present an approach to effectively suppress space-charge artifacts in momentum microscopes and photoemission microscopes. A retarding electrostatic field generated by a special objective lens repels slow electrons, retaining the k-image of the fast photoelectrons. The suppression of space-charge effects scales with the ratio of the photoelectron velocities of fast and slow electrons. Fields in the range from -20 to -1100 V/mm for E-kin = 100 eV to 4 keV direct secondaries and pump-induced slow electrons back to the sample surface. Ray tracing simulations reveal that this happens within the first 40 to 3 mu m above the sample surface for E-kin = 100 eV to 4 keV. An optimized front-lens design allows switching between the conventional accelerating and the new retarding mode. Time-resolved experiments at E-kin = 107 eV using fs extreme ultraviolet probe pulses from the free-electron laser FLASH reveal that the width of the Fermi edge increases by just 30 meV at an incident pump fluence of 22 mJ/cm(2) (retarding field -21 V/mm). For an accelerating field of +2 kV/mm and a pump fluence of only 5 mJ/cm(2), it increases by 0.5 eV (pump wavelength 1030 nm). At the given conditions, the suppression mode permits increasing the slow-electron yield by three to four orders of magnitude. The feasibility of the method at high energies is demonstrated without a pump beam at E-kin = 3830 eV using hard x rays from the storage ring PETRA III. The approach opens up a previously inaccessible regime of pump fluences for photoemission experiments.
Subject headings
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Schönhense, G.
-
Kutnyakhov, D.
-
Pressacco, F.
-
Heber, M.
-
Wind, N.
-
Agustsson, S. Y.
-
show more...
-
Babenkov, S.
-
Vasilyev, D.
-
Fedchenko, O.
-
Chernov, S.
-
Rettig, L.
-
Schönhense, B.
-
Wenthaus, L.
-
Brenner, G.
-
Dziarzhytski, S.
-
Palutke, S.
-
Mahatha, S. K.
-
Schirmel, N.
-
Redlin, H.
-
Manschwetus, B.
-
Hartl, I
-
Matveyev, Yu
-
Gloskovskii, A.
-
Schlueter, C.
-
Shokeen, Vishal
-
Dürr, Hermann
-
Allison, T. K.
-
Beye, M.
-
Rossnagel, K.
-
Elmers, H. J.
-
Medjanik, K.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Accelerator Phys ...
- Articles in the publication
-
Review of Scient ...
- By the university
-
Uppsala University