Polarization measurement of a slow positron beam generated with a compact cyclotron

T. Kumita; M. Chiba; R. Hamatsu; M. Hirose; T. Hirose; H. Iijima; M. Irako; M. Washio; J. Yang

doi:10.4028/www.scientific.net/msf.255-257.656

Polarization measurement of a slow positron beam generated with a compact cyclotron

T. Kumita^*, M. Chiba, R. Hamatsu, M. Hirose, T. Hirose, H. Iijima, M. Irako, M. Washio, J. Yang

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

We measured polarization of a slow positron beam produced in online-manner via the 27Al(p,n) 27Si reaction caused by proton irradiation. The intensity of this beam is measured to be 5105 e+/sec for protons with the energy of 18MeV and the current of 30mA. The polarization measurement makes use of the magnetic quenching of positronium due to Zeeman effect in a magnetic field of a several kG. The polarization of the beam is evaluated to be 38.44.0(statistical)5.8(systematic)%, which is consistent with the estimation based on our Monte Carlo simulations including depolarization processes in matter.

Original language	English
Pages (from-to)	656-658
Number of pages	3
Journal	Materials Science Forum
Volume	255-257
DOIs	https://doi.org/10.4028/www.scientific.net/msf.255-257.656
Publication status	Published - 1997
Externally published	Yes

Keywords

Ortho-Like Positronium
Polarimeter
Polarized Beam
Positron Beam

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.4028/www.scientific.net/msf.255-257.656

Cite this

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title = "Polarization measurement of a slow positron beam generated with a compact cyclotron",

abstract = "We measured polarization of a slow positron beam produced in online-manner via the 27Al(p,n) 27Si reaction caused by proton irradiation. The intensity of this beam is measured to be 5105 e+/sec for protons with the energy of 18MeV and the current of 30mA. The polarization measurement makes use of the magnetic quenching of positronium due to Zeeman effect in a magnetic field of a several kG. The polarization of the beam is evaluated to be 38.44.0(statistical)5.8(systematic)%, which is consistent with the estimation based on our Monte Carlo simulations including depolarization processes in matter.",

keywords = "Ortho-Like Positronium, Polarimeter, Polarized Beam, Positron Beam",

author = "T. Kumita and M. Chiba and R. Hamatsu and M. Hirose and T. Hirose and H. Iijima and M. Irako and M. Washio and J. Yang",

year = "1997",

doi = "10.4028/www.scientific.net/msf.255-257.656",

language = "English",

volume = "255-257",

pages = "656--658",

journal = "Materials Science Forum",

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TY - JOUR

T1 - Polarization measurement of a slow positron beam generated with a compact cyclotron

AU - Kumita, T.

AU - Chiba, M.

AU - Hamatsu, R.

AU - Hirose, M.

AU - Hirose, T.

AU - Iijima, H.

AU - Irako, M.

AU - Washio, M.

AU - Yang, J.

PY - 1997

Y1 - 1997

N2 - We measured polarization of a slow positron beam produced in online-manner via the 27Al(p,n) 27Si reaction caused by proton irradiation. The intensity of this beam is measured to be 5105 e+/sec for protons with the energy of 18MeV and the current of 30mA. The polarization measurement makes use of the magnetic quenching of positronium due to Zeeman effect in a magnetic field of a several kG. The polarization of the beam is evaluated to be 38.44.0(statistical)5.8(systematic)%, which is consistent with the estimation based on our Monte Carlo simulations including depolarization processes in matter.

AB - We measured polarization of a slow positron beam produced in online-manner via the 27Al(p,n) 27Si reaction caused by proton irradiation. The intensity of this beam is measured to be 5105 e+/sec for protons with the energy of 18MeV and the current of 30mA. The polarization measurement makes use of the magnetic quenching of positronium due to Zeeman effect in a magnetic field of a several kG. The polarization of the beam is evaluated to be 38.44.0(statistical)5.8(systematic)%, which is consistent with the estimation based on our Monte Carlo simulations including depolarization processes in matter.

KW - Ortho-Like Positronium

KW - Polarimeter

KW - Polarized Beam

KW - Positron Beam

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DO - 10.4028/www.scientific.net/msf.255-257.656

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VL - 255-257

SP - 656

EP - 658

JO - Materials Science Forum

JF - Materials Science Forum

ER -

Polarization measurement of a slow positron beam generated with a compact cyclotron

Abstract

Keywords

ASJC Scopus subject areas

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