Journal Article

IMPULSE-2026-00011

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Integrated anti-electronics for positron annihilation spectroscopy

Guatieri, F. (Corresponding author)MLZ*

2025
Springer Nature [London]

Please use a persistent id in citations: doi:10.1038/s41598-025-89630-9

Abstract: Imaging the features of a sample using Positron Annihilation Spectroscopy (PAS) is currently achieved by rastering, i.e. by scanning the sample surface with a sharply focused positron beam. However, a beam of arbitrary shape (sculpted beam) would allow the application of more versatile single-pixel imaging (SPI) techniques. I introduce the design of a microelectronic device employing a 2D array of Zener diodes as an active positron moderator, capable of sculpting positron beams with 6μm resolution. The re-emitted positrons are accelerated towards the sample through a miniaturized electrostatic lens system and reaching 100nm resolution. The fast switch-on (90ps) and switch-off (250ps) time of the device would enable state-of-the-art positron annihilation lifetime spectroscopy (PALS) and PAS imaging with high spatial and temporal resolution.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. NEPOMUC (NEPOMUC)

Experiment(s):

1. NEPOMUC: Neutron induced positron source munich (SR11)

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