Riccardo Agnello

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Related publications (46)

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Optical emission spectroscopy and microwave reflectometry for magnetised plasmas: Applications to ion sources and fusion machines

Riccardo Agnello

. - Investigation of magnetised plasmas by advanced diagnostics is a relevant topic in the frame of ion sources for high-performance particle accelerators and in thermonuclear fusion research for energetic purposes. In this paper, we propose two different ...

SOC ITALIANA FISICA2024

Negative ion characterization in a helicon plasma source for fusion neutral beams by cavity ring-down spectroscopy and Langmuir probe laser photodetachment

Riccardo Agnello

2019

Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch

Ambrogio Fasoli, Ivo Furno, Patrick Blanchard, Alan Howling, Yanis Andrebe, Riccardo Agnello, Rémy Jacquier

Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of the longitudinal wakefield amplitude driven by a self-modulated proton bun ...

2021

Development of the self-modulation instability of a relativistic proton bunch in plasma

Ambrogio Fasoli, Sun Hee Kim, Ivo Furno, Patrick Blanchard, Ana Francisca Leal Silva Soares, Yanis Andrebe, Riccardo Agnello, Samuel Rey-Mermet, Christine Stollberg, Alban Sublet

Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size ...

2023

Improvement of SPIDER diagnostic systems

Riccardo Agnello

2023

Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

Ambrogio Fasoli, Ivo Furno, Patrick Blanchard, Yanis Andrebe, Riccardo Agnello

We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufticient initial amplitude [>= (4.1 +/- 0.4) MV/m], the phase of ...

2021