Sep 15 – 19, 2024
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Characterization of the ECR ion source LEGIS extraction system and its low energy beam transport line at Legnaro National Laboratories

MOD2
Sep 16, 2024, 4:30 PM
30m
Main Hall (Welcome Hotel Darmstadt City Center)

Main Hall

Welcome Hotel Darmstadt City Center

Karolinenplatz 4 64289 Darmstadt Germany https://www.welcome-hotels.com/hotels/darmstadt/
Oral Presentation MC7: Beam Extraction and Transport MOD: Oral Session MC1&MC7

Speaker

Giada Rachele Mascali (Sapienza University of Rome)

Description

At INFN-Legnaro National Laboratories the heavy ions accelerator complex is fed with beams produced by a permanent magnet ECR source called LEGIS (LEGnaro ecrIS). Although suitable intensities and charge states to fulfil the requests of the users are normally guaranteed, the first part of the Low Energy Beam Transport line (LEBT) downstream of the ion source suffers from non-negligible losses and a lack of scalability when switching between ions with different mass-to-charge ratios, thus leading to a machine preparation time longer than would be desirable. These criticalities called for a deep characterization of the beam coming out from the ion source, especially in the case of high charge states heavy ions production, normally showing the lowest intensities. This contribution describes the numerical studies performed on the extraction system of the LEGIS source and its LEBT. The physics case used is a ²⁰⁸Pb³¹⁺ beam produced for a nuclear physics experiment in fall 2022. As will be shown, the results shed light on the reasons for the bad reproducibility and transmission, mostly due to aberrations induced on the extracted beam by the first optical elements.

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Primary author

Giada Rachele Mascali (Sapienza University of Rome)

Co-authors

Luca Bellan (Istituto Nazionale di Fisica Nucleare) Carmelo Sebastiano Gallo (Istituto Nazionale di Fisica Nucleare) Denis Martini (Istituto Nazionale di Fisica Nucleare) Paolo Francescon (Istituto Nazionale di Fisica Nucleare) Michele Comunian (Istituto Nazionale di Fisica Nucleare) Osvaldo Carletto (Istituto Nazionale di Fisica Nucleare) Alessio Galatà (Istituto Nazionale di Fisica Nucleare)

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