Cryogenic thermoacoustics in the SPIRAL2 LINAC

Adnan Ghribi (1) , Muhammad Aburas (1) , Abdallah Alhaffar (1) , Pierre-Emmanuel Bernaudin (1) , Patxi Duthil (2) , Maroun Nemer (3) , Jean-Pierre Thermeau (4)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
3 CES - Centre Efficacité Énergétique des Systèmes
4 APC (UMR_7164) - AstroParticule et Cosmologie

•Investigation of thermo-acoustic oscillation in heavy ions superconducting linear accelerator.•Statistical study of amplitudes and frequencies of TAO.•Comparison of different TAO damping solutions.•Investigation of damping solutions side effects on cryogenic operation. SPIRAL2 is a superconducting LINAC subject to cryogenic thermoacoustic oscillations occurring in its valves boxes. 4 years of monitoring and experimental investigations with thousands of datasets turned these unwanted effects into an opportunity to study and understand thermoacoustics in a complex environment such as a real life accelerator. Without digging deep into Rott’s thermoacoustics theory, thoroughly shown in other works, this paper describes the instrumentation and the methods that prepare more advanced modeling of these phenomena either to damp or to harness the energy of cryogenic thermoacoustics.

Keywords: Thermoacoustics; Cryogenics; Superconducting accelerators; LINAC

Domains: Accelerator Physics [physics.acc-ph]; Physics [physics]; Instrumentation and Detectors [physics.ins-det]

Adnan Ghribi, Muhammad Aburas, Abdallah Alhaffar, Pierre-Emmanuel Bernaudin, Patxi Duthil, et al.. Cryogenic thermoacoustics in the SPIRAL2 LINAC. Cryogenics, 2022, 124, pp.103487. ⟨10.1016/j.cryogenics.2022.103487⟩. ⟨hal-03596076⟩