Progress of the intense positron beam project EPOS

Krause‐Rehberg, R.; Bräuer, G.; Jungmann, Marco; Krille, Arnold; Rogov, A. D.; Noack, K.

doi:10.1016/j.apsusc.2008.05.283

Cited by 17 publications

(5 citation statements)

References 2 publications

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“…The isotropic emission and the high energy of common positron emitters cause penetration depths which are on the mm-scale. The installation described here overcomes this limitation by using mono-energetic positron beams with kinetic energies between 0.5 keV and 20 keV thus enabling depth-dependent thin film studies on the nm to µm scale [2].…”

Section: Introductionmentioning

confidence: 99%

Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

Wagner

Anwand

Attallah

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA. The electron beam is employed for production of several secondary beams including X-rays from bremsstrahlung production, neutrons, and positrons. The secondary positron beam after moderation feeds the Monoenergetic Positron Source (MePS) where positron annihilation lifetime (PALS) and positron annihilation Doppler-broadening experiments in materials science are performed in parallel. The adjustable repetition rate of the continuous-wave electron beams allows matching of the pulse separation to the positron lifetime in the sample under study. The energy of the positron beam can be set between 0.5 keV and 20 keV to perform depth resolved defect spectroscopy and porosity studies especially for thin films.

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Section: Introductionmentioning

confidence: 99%

Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

Wagner

Anwand

Attallah

et al. 2017

J. Phys.: Conf. Ser.

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“…Several facilities of this type are currently in operation around the world with electron energies from about 15 MeV to 1.3 GeV (Jungmann et al, 2013;Krause-Rehberg et al, 2008;O'Rourke et al, 2011;Wada et al, 2012;Wang et al, 2008). It is also possible to obtain useful positron output using more modest electron accelerators.…”

Section: Electron Acceleratorsmentioning

confidence: 99%

Plasma and trap-based techniques for science with positrons

Danielson¹,

Dubin²,

Greaves³

et al. 2015

Rev. Mod. Phys.

234

222

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In recent years, there has been a wealth of new science involving low-energy antimatter (i.e., positrons and antiprotons) at energies ranging from 10 2 to less than 10 −3 eV. Much of this progress has been driven by the development of new plasma-based techniques to accumulate, manipulate and deliver antiparticles for specific applications. This article focuses on the advances made in this area using positrons. However many of the resulting techniques are relevant to antiprotons as well. An overview is presented of relevant theory of single-component plasmas in electromagnetic traps. Methods are described to produce intense sources of positrons and to efficiently slow the typically energetic particles thus produced. Techniques are described to trap positrons efficiently and to cool and compress the resulting positron gases and plasmas. Finally, the procedures developed to deliver tailored pulses and beams (e.g., in intense, short bursts, or as quasi-monoenergetic continuous beams) for specific applications are reviewed. The status of development in specific application areas is also reviewed. One example is the formation of antihydrogen atoms for fundamental physics [e.g., tests of invariance under charge conjugation, parity inversion and time reversal (the CPT theorem), and studies of the interaction of gravity with antimatter]. Other applications discussed include atomic and materials physics studies and study of the electron-positron many-body system, including both classical electron-positron plasmas and the complementary quantum system in the form of Bose-condensed gases of positronium atoms. Areas of future promise are also discussed. The review concludes with a brief summary and a list of outstanding challenges.

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“…Intense positron sources, i.e., sources providing more than 10 7 monoenergetic positrons per second, are operated at several large scale facilities worldwide. Based on the pair-production process such positron sources have been implemented either at electron linacs at AIST [1] and KEK [2] (both located in Tsukuba, Japan) and at ELBE, Germany [3] or at research reactors in Delft, Netherlands [4] and at NEPOMUC at FRM II Munich [5].…”

Section: Introductionmentioning

confidence: 99%

Positron Beam Facility at NEPOMUC: Status and Recent Developments

Hugenschmidt

2020

Acta Phys. Pol. A

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Low-energy positron beams are applied in a number of experiments in solid state physics and materials science as well as in atomic and particle physics. These experiments comprise of surface studies, depth dependent defect spectroscopy, and fundamental research with leptonic systems. The neutron induced positron source in Munich (NEPOMUC) is operated as a user facility providing a positron beam with an intensity of about 10 9 moderated positrons per second. In this paper, a review of the status of the positron beam facility with its instruments is given and several experiments are exemplarily highlighted. Recent and future developments for further improving the performance of positron beam experiments are discussed.

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Progress of the intense positron beam project EPOS

Cited by 17 publications

References 2 publications

Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

Positron annihilation lifetime spectroscopy at a superconducting electron accelerator

Plasma and trap-based techniques for science with positrons

Positron Beam Facility at NEPOMUC: Status and Recent Developments

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