19-20 febbraio 2024
Federico II Conference Center
Europe/Rome timezone

Material Characterizations in the Sub-THz Region for Particle Accelerators

20 feb 2024, 16:20
20m
Aula B (Federico II Conference Center)

Aula B

Federico II Conference Center

Via Partenope 36 - Napoli

Speaker

Andrea Passarelli (INFN - Sezione di Napoli)

Description

Coatings play a crucial role for the functionality of vacuum chambers in particle accelerators, serving dual purposes by efficiently facilitating pumping and mitigating electron cloud effects. However, their impact on the surface resistance of chamber walls raises concerns, potentially influencing machine performances and imposing limitations on achievable energies and currents. Therefore, an electromagnetic characterization is essential for a comprehensive study of accelerator structures, particularly in the context of the next generation of particle accelerators where the demand for extremely short bunches accentuates the importance of assessing material responses in the sub-THz region.

In this presentation, we focus on the electromagnetic characterization of three different types of Non-Evaporable Getters (NEG) coatings. Specifically, we examine the CERN standard, a densified film using HiPIMS, and porous, high-pressure coated. NEG coatings are particularly utilized to achieve conditions of ultra-high vacuum. Additionally, we explore the characterization of Amorphous Carbon (a-C), necessitating a modification of the setup. a-C is primarily employed for mitigating the electron cloud effect.

Through this presentation, we will showcase the electromagnetic characterization of these coating materials using a time-domain method based on THz waveguide spectroscopy. This advanced methodology allows for a comprehensive exploration of the electromagnetic properties of coatings, providing valuable insights into their behavior within the sub-THz frequency range. The findings contribute to a deeper understanding of the intricate interactions between coatings and accelerator structures, with the aim of optimizing performance and efficiency in the evolving landscape of particle acceleration technologies.

Primary authors

Andrea Passarelli (INFN - Sezione di Napoli) Maria Rosaria Masullo (Istituto Nazionale di Fisica Nucleare) Zahra Mazaheri (Universtiy of Naples, Federico II) Can Koral (Department of Science, University of Basilicata) Antonello Andreone (Universtiy of Naples, Federico II)

Presentation Materials

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