Momentum spectrometer for electron-electron coincidence studies on superconductors

Robert Wallauer; Stefan Voss; Lutz Foucar; Tobias Bauer; Deborah Schneider; Jasmin Titze; Birte Ulrich; Katharina Kreidi; Nadine Neumann; Tilo Havermeier; Markus Schöffler; Till Jahnke; Achim Czasch; Lothar Schmidt; Amit Kanigel; Juan Carlos Campuzano; Harald Jeschke; Roser Valenti; Andreas Müller; Götz Berner; Michael Sing; Ralph Claessen; Horst Schmidt-Böcking; Reinhard Dörner

doi:10.1063/1.4754470

Momentum spectrometer for electron-electron coincidence studies on superconductors

Robert Wallauer, Stefan Voss, Lutz Foucar, Tobias Bauer, Deborah Schneider, Jasmin Titze, Birte Ulrich, Katharina Kreidi, Nadine Neumann, Tilo Havermeier, Markus Schöffler, Till Jahnke, Achim Czasch, Lothar Schmidt, Amit Kanigel, Juan Carlos Campuzano, Harald Jeschke, Roser Valenti, Andreas Müller, Götz BernerMichael Sing, Ralph Claessen, Horst Schmidt-Böcking, Reinhard Dörner

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We present a new experimental setup to study electron-electron coincidences from superconducting surfaces. In our approach, electrons emitted from a surface are projected onto a time- and position-sensitive microchannel plate detector with delayline position readout. Electrons that are emitted within 2 π solid angle with respect to the surface are detected in coincidence. The detector used is a hexagonal delayline detector with enhanced multiple hit capabilities. It is read out with a Flash analog-to-digital converter. The three-dimensional momentum vector is obtained for each electron. The intrinsic dead time of the detector has been greatly reduced by implementing a new algorithm for pulse analysis. The sample holder has been matched to fit the spectrometer while being capable of cooling down the sample to 4.5 K during the measurement and heating it up to 420 K for the cleaning procedure.

Original language	English
Article number	103905
Journal	Review of Scientific Instruments
Volume	83
Issue number	10
DOIs	https://doi.org/10.1063/1.4754470
Publication status	Published - Oct 2012
Externally published	Yes

ASJC Scopus subject areas

Instrumentation

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Wallauer, R., Voss, S., Foucar, L., Bauer, T., Schneider, D., Titze, J., Ulrich, B., Kreidi, K., Neumann, N., Havermeier, T., Schöffler, M., Jahnke, T., Czasch, A., Schmidt, L., Kanigel, A., Campuzano, J. C., Jeschke, H., Valenti, R., Müller, A., ... Dörner, R. (2012). Momentum spectrometer for electron-electron coincidence studies on superconductors. Review of Scientific Instruments, 83(10), Article 103905. https://doi.org/10.1063/1.4754470

Wallauer, R, Voss, S, Foucar, L, Bauer, T, Schneider, D, Titze, J, Ulrich, B, Kreidi, K, Neumann, N, Havermeier, T, Schöffler, M, Jahnke, T, Czasch, A, Schmidt, L, Kanigel, A, Campuzano, JC, Jeschke, H, Valenti, R, Müller, A, Berner, G, Sing, M, Claessen, R, Schmidt-Böcking, H & Dörner, R 2012, 'Momentum spectrometer for electron-electron coincidence studies on superconductors', Review of Scientific Instruments, vol. 83, no. 10, 103905. https://doi.org/10.1063/1.4754470

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title = "Momentum spectrometer for electron-electron coincidence studies on superconductors",

abstract = "We present a new experimental setup to study electron-electron coincidences from superconducting surfaces. In our approach, electrons emitted from a surface are projected onto a time- and position-sensitive microchannel plate detector with delayline position readout. Electrons that are emitted within 2 π solid angle with respect to the surface are detected in coincidence. The detector used is a hexagonal delayline detector with enhanced multiple hit capabilities. It is read out with a Flash analog-to-digital converter. The three-dimensional momentum vector is obtained for each electron. The intrinsic dead time of the detector has been greatly reduced by implementing a new algorithm for pulse analysis. The sample holder has been matched to fit the spectrometer while being capable of cooling down the sample to 4.5 K during the measurement and heating it up to 420 K for the cleaning procedure.",

author = "Robert Wallauer and Stefan Voss and Lutz Foucar and Tobias Bauer and Deborah Schneider and Jasmin Titze and Birte Ulrich and Katharina Kreidi and Nadine Neumann and Tilo Havermeier and Markus Sch{\"o}ffler and Till Jahnke and Achim Czasch and Lothar Schmidt and Amit Kanigel and Campuzano, {Juan Carlos} and Harald Jeschke and Roser Valenti and Andreas M{\"u}ller and G{\"o}tz Berner and Michael Sing and Ralph Claessen and Horst Schmidt-B{\"o}cking and Reinhard D{\"o}rner",

note = "Funding Information: This work is supported by the BMBF. H.O.J. acknowledges support by the Helmholtz Association via HA216/EMMI. We thank HZB for the allocation of synchrotron radiation beamtime and financial support.",

year = "2012",

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doi = "10.1063/1.4754470",

language = "English",

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T1 - Momentum spectrometer for electron-electron coincidence studies on superconductors

AU - Wallauer, Robert

AU - Voss, Stefan

AU - Foucar, Lutz

AU - Bauer, Tobias

AU - Schneider, Deborah

AU - Titze, Jasmin

AU - Ulrich, Birte

AU - Kreidi, Katharina

AU - Neumann, Nadine

AU - Havermeier, Tilo

AU - Schöffler, Markus

AU - Jahnke, Till

AU - Czasch, Achim

AU - Schmidt, Lothar

AU - Kanigel, Amit

AU - Campuzano, Juan Carlos

AU - Jeschke, Harald

AU - Valenti, Roser

AU - Müller, Andreas

AU - Berner, Götz

AU - Sing, Michael

AU - Claessen, Ralph

AU - Schmidt-Böcking, Horst

AU - Dörner, Reinhard

N1 - Funding Information: This work is supported by the BMBF. H.O.J. acknowledges support by the Helmholtz Association via HA216/EMMI. We thank HZB for the allocation of synchrotron radiation beamtime and financial support.

PY - 2012/10

Y1 - 2012/10

N2 - We present a new experimental setup to study electron-electron coincidences from superconducting surfaces. In our approach, electrons emitted from a surface are projected onto a time- and position-sensitive microchannel plate detector with delayline position readout. Electrons that are emitted within 2 π solid angle with respect to the surface are detected in coincidence. The detector used is a hexagonal delayline detector with enhanced multiple hit capabilities. It is read out with a Flash analog-to-digital converter. The three-dimensional momentum vector is obtained for each electron. The intrinsic dead time of the detector has been greatly reduced by implementing a new algorithm for pulse analysis. The sample holder has been matched to fit the spectrometer while being capable of cooling down the sample to 4.5 K during the measurement and heating it up to 420 K for the cleaning procedure.

AB - We present a new experimental setup to study electron-electron coincidences from superconducting surfaces. In our approach, electrons emitted from a surface are projected onto a time- and position-sensitive microchannel plate detector with delayline position readout. Electrons that are emitted within 2 π solid angle with respect to the surface are detected in coincidence. The detector used is a hexagonal delayline detector with enhanced multiple hit capabilities. It is read out with a Flash analog-to-digital converter. The three-dimensional momentum vector is obtained for each electron. The intrinsic dead time of the detector has been greatly reduced by implementing a new algorithm for pulse analysis. The sample holder has been matched to fit the spectrometer while being capable of cooling down the sample to 4.5 K during the measurement and heating it up to 420 K for the cleaning procedure.

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Momentum spectrometer for electron-electron coincidence studies on superconductors

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