NEPOMUC: Neutron induced positron source Munich

NEPOMUC, operated by the Technische Universität München and the Universität der Bundeswehr München, provides a high-intensity low-energy positron beam for applications in solid state and surface physics as well as for fundamental research in nuclear and atomic physics. The intensity amounts to > 10<sup>9</sup> moderated positrons per second at a beam energy of E = 1 keV.

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Development of a high intensity low energy positron beam

10.1063/1.45517 ◽

1994 ◽

Cited By ~ 1

Author(s):

W. B. Waeber ◽

M. Shi ◽

D. Taqqu ◽

U. Zimmermann ◽

D. Gerola ◽

...

Keyword(s):

High Intensity ◽

Positron Beam ◽

Low Energy

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Low-energy positrons of high intensity at the new positron beam facility NEPOMUC

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ◽

10.1016/j.nima.2005.07.069 ◽

2005 ◽

Vol 554 (1-3) ◽

pp. 384-391 ◽

Cited By ~ 32

Author(s):

C. Hugenschmidt ◽

K. Schreckenbach ◽

M. Stadlbauer ◽

B. Straßer

Keyword(s):

High Intensity ◽

Positron Beam ◽

Low Energy

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Proposal of a high-field superconducting wiggler for a slow positron source at SPring-8

Journal of Synchrotron Radiation ◽

10.1107/s0909049597018773 ◽

1998 ◽

Vol 5 (3) ◽

pp. 360-362 ◽

Cited By ~ 9

Author(s):

A. Ando ◽

S. Daté ◽

M. G. Fedurin ◽

M. Hara ◽

H. Kamitsubo ◽

...

Keyword(s):

High Field ◽

Magnetic System ◽

Positron Beam ◽

Beam Current ◽

High Energy ◽

Low Energy ◽

Positron Source ◽

Slow Positron ◽

Unique Probe ◽

Suitable Target

A low-energy positron beam is a unique probe of materials. In high-energy electron and positron storage rings it is possible to generate intense synchrotron radiation with a photon energy of 1–3 MeV by installing a high-field (8–10 T) superconducting wiggler. High-energy photons are converted to low-energy positrons by using a suitable target–moderator system. For an 8 GeV electron storage ring at a beam current of 100 mA, final yields are estimated to be about 108–1010 slow-e+ s−1 or larger depending on the moderation efficiency, with the size of the positron source 101–102 cm2. In the present work a wiggler magnetic system of 10 T is proposed. The main parameters of the superconducting wiggler are presented.

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Low-energy, high-intensity positron beam experiments with a linac

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/0168-583x(85)90272-1 ◽

1985 ◽

Vol 10-11 ◽

pp. 373-377 ◽

Cited By ~ 30

Author(s):

R.H. Howell ◽

M.J. Fluss ◽

I.J. Rosenberg ◽

P. Meyer

Keyword(s):

High Intensity ◽

Positron Beam ◽

Low Energy

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Special Aspects of High-Intensity Low-Energy Ion Implantation

Russian Physics Journal ◽

10.1007/s11182-021-02238-0 ◽

2021 ◽

Author(s):

A. I. Ryabchikov ◽

A. I. Ivanova ◽

O. S. Korneva ◽

D. O. Sivin

Keyword(s):

Ion Implantation ◽

High Intensity ◽

Low Energy

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DETERMINING THE SIGN OF Δ31 AT LONG BASELINE NEUTRINO EXPERIMENTS

Modern Physics Letters A ◽

10.1142/s0217732301004984 ◽

2001 ◽

Vol 16 (29) ◽

pp. 1881-1886

Author(s):

MOHAN NARAYAN ◽

S. UMA SANKAR

Keyword(s):

High Intensity ◽

Low Energy ◽

Earth’S Crust ◽

Mixing Angle ◽

Background Ratio ◽

Matter Effects ◽

Long Baseline ◽

Earth's Crust ◽

Neutrino Experiments

Recently it is advocated that high intensity and low energy (Eν~2 GeV ) neutrino beams should be built to probe the (13) mixing angle ϕ to a level of a few parts in 104. Experiments using such beams will have better signal-to-background ratio in searches for νμ→νe oscillations. We propose that such experiments can also determine the sign of Δ31 even if the beam consists of neutrinos only. By measuring the νμ→νe transitions in two different energy ranges, the effects due to propagation of neutrinos through earth's crust can be isolated and the sign of Δ31 can be determined. If the sensitivity of an experiment to ϕ is ε, then the same experiment is automatically sensitive to matter effects and the sign of Δ31 for values of ϕ≥2ε.

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