High-intensity variable-energy positron beam for surface and near-surface studies

J. Lahtinen; A. Vehanen; H. Huomo; Jari Mäkinen; P. A. Huttunen; K. Rytsölä; M. Bentzon; Pekka Hautojärvi

doi:10.1016/0168-583X(86)90455-6

High-intensity variable-energy positron beam for surface and near-surface studies

J. Lahtinen^*, A. Vehanen, H. Huomo, Jari Mäkinen, P. A. Huttunen, K. Rytsölä, M. Bentzon, Pekka Hautojärvi

^*Tämän työn vastaava kirjoittaja

Aalto University

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

43 Sitaatiot (Scopus)

Abstrakti

We report on the construction and performance of a magnetically confined slow positron beam. The beam is designed for surface physics and near-surface disorder studies and it operates in ultrahigh vacuum with a base pressure of 3 nPa. The beam uses a Co-58 source with a backscattering W(110) single crystal moderator. We get 4.7 × 10⁶ slow positrons per second striking the sample using a 300 mCi source corresponding to a fast-to-slow positron conversion efficiency 0.28 ± 0.02%. The energy of the incident positrons can be varied from 1 eV to 35 keV. Some applications concerning positron re-emission and diffusion as well as positronium desorption from a surface state are shown.

Alkuperäiskieli	Englanti
Sivut	73-80
Sivumäärä	8
Julkaisu	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Vuosikerta	17
Numero	1
DOI - pysyväislinkit	https://doi.org/10.1016/0168-583X(86)90455-6
Tila	Julkaistu - 1986
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1016/0168-583X(86)90455-6

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Lahtinen, J., Vehanen, A., Huomo, H., Mäkinen, J., Huttunen, P. A., Rytsölä, K., Bentzon, M., & Hautojärvi, P. (1986). High-intensity variable-energy positron beam for surface and near-surface studies. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 17(1), 73-80. https://doi.org/10.1016/0168-583X(86)90455-6

@article{694583e79de1452a94126da57a33b21f,

title = "High-intensity variable-energy positron beam for surface and near-surface studies",

abstract = "We report on the construction and performance of a magnetically confined slow positron beam. The beam is designed for surface physics and near-surface disorder studies and it operates in ultrahigh vacuum with a base pressure of 3 nPa. The beam uses a Co-58 source with a backscattering W(110) single crystal moderator. We get 4.7 × 106 slow positrons per second striking the sample using a 300 mCi source corresponding to a fast-to-slow positron conversion efficiency 0.28 ± 0.02%. The energy of the incident positrons can be varied from 1 eV to 35 keV. Some applications concerning positron re-emission and diffusion as well as positronium desorption from a surface state are shown.",

author = "J. Lahtinen and A. Vehanen and H. Huomo and Jari M{\"a}kinen and Huttunen, {P. A.} and K. Ryts{\"o}l{\"a} and M. Bentzon and Pekka Hautoj{\"a}rvi",

year = "1986",

doi = "10.1016/0168-583X(86)90455-6",

language = "English",

volume = "17",

pages = "73--80",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier",

number = "1",

}

Lahtinen, J, Vehanen, A, Huomo, H, Mäkinen, J, Huttunen, PA, Rytsölä, K, Bentzon, M & Hautojärvi, P 1986, 'High-intensity variable-energy positron beam for surface and near-surface studies', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vuosikerta 17, Nro 1, Sivut 73-80. https://doi.org/10.1016/0168-583X(86)90455-6

TY - JOUR

T1 - High-intensity variable-energy positron beam for surface and near-surface studies

AU - Lahtinen, J.

AU - Vehanen, A.

AU - Huomo, H.

AU - Mäkinen, Jari

AU - Huttunen, P. A.

AU - Rytsölä, K.

AU - Bentzon, M.

AU - Hautojärvi, Pekka

PY - 1986

Y1 - 1986

N2 - We report on the construction and performance of a magnetically confined slow positron beam. The beam is designed for surface physics and near-surface disorder studies and it operates in ultrahigh vacuum with a base pressure of 3 nPa. The beam uses a Co-58 source with a backscattering W(110) single crystal moderator. We get 4.7 × 106 slow positrons per second striking the sample using a 300 mCi source corresponding to a fast-to-slow positron conversion efficiency 0.28 ± 0.02%. The energy of the incident positrons can be varied from 1 eV to 35 keV. Some applications concerning positron re-emission and diffusion as well as positronium desorption from a surface state are shown.

AB - We report on the construction and performance of a magnetically confined slow positron beam. The beam is designed for surface physics and near-surface disorder studies and it operates in ultrahigh vacuum with a base pressure of 3 nPa. The beam uses a Co-58 source with a backscattering W(110) single crystal moderator. We get 4.7 × 106 slow positrons per second striking the sample using a 300 mCi source corresponding to a fast-to-slow positron conversion efficiency 0.28 ± 0.02%. The energy of the incident positrons can be varied from 1 eV to 35 keV. Some applications concerning positron re-emission and diffusion as well as positronium desorption from a surface state are shown.

UR - http://www.scopus.com/inward/record.url?scp=0022769013&partnerID=8YFLogxK

U2 - 10.1016/0168-583X(86)90455-6

DO - 10.1016/0168-583X(86)90455-6

M3 - Article

AN - SCOPUS:0022769013

SN - 0168-583X

VL - 17

SP - 73

EP - 80

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1

ER -

High-intensity variable-energy positron beam for surface and near-surface studies

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