41 citations · 83 across the 10 of their papers we have counts for
11 papers
Development of fault identification pipeline for SPIRAL2 LLRF data
Charly Lassalle, Patrick Bonnay, Frédéric Bouly +2
SPIRAL2 is a state-of-the-art superconducting linear accelerator for heavy ions. The radiofrequency operation of the linac can be disrupted by anomalies that affect its reliability…
Cryogenics of a superconducting LINAC : SPIRAL2 from commissioning to operation
Adnan Ghribi, Muhammad Aburas, Pierre-Emmanuel Bernaudin +11
The SPIRAL2 superconducting linear accelerator (LINAC), which has been operational since 2019, employs superconducting, independently phased RF resonators to deliver a wide range o…
Advanced cryogenic process control and monitoring for the SPIRAL2 superconducting LINAC
Adnan Ghribi, Muhammad Aburas, Pierre-Emmanuel Bernaudin +8
SPIRAL2 is a superconducting accelerator for protons, deuterons and heavy ions delivering a maximum beam power of 200 kW at 40 MeV (for deuteron beams). 26 superconducting quarter…
On the use of Anderson acceleration in hierarchical control
Xuan-Huy Pham, Mazen Alamir, François Bonne +1
This paper investigates the use of fixed-point Anderson acceleration method (AA) to a recently proposed hierarchical control framework. Due to its model-free property, the AA-based…
A generic fixed-point iteration-based hierarchical control design: Application to a cryogenic process
Xuan-Huy Pham, Mazen Alamir, François Bonne +1
This paper presents an extension of a recently proposed hierarchical control framework applied to a cryogenic system. While in the previous work, each sub-system in the decompositi…
SPIRAL2 Cryomodules Models: a Gateway to Process Control and Machine Learning
Adrien Vassal, Adnan Ghribi, François Millet +3
From simple physical systems to full production lines, numerical models could be used to minimize downtime and to optimize performances. In this article, the system of interest is…
Fabrication and characterization of super-polished wedged borosilicate nano-cells
T. Peyrot, Ch. Beurthe, S. Coumar +6
We report on the fabrication of an all-glass vapor cell with a thickness varying linearly between (exactly) 0 and ~ 1 μm. The cell is made in Borofloat glass that allows super poli…
Fixed-point Based Hierarchical MPC Control Design For a Cryogenic Refrigerator
M. Alamir, P. Bonnay, F. Bonne +1
In this paper, a simple and general hierarchical control framework is proposed and validated through the interconnection of the Joule-Thompson and the Brayton cycle stages of a cry…
Approximate explicit model predictive control via piecewise nonlinear system identification
Van-Vuong Trinh, Mazen Alamir, Patrick Bonnay
This article presents an identification methodology to capture general relationships, with application to piecewise nonlinear approximations of model predictive control for constra…
Experimental Investigation of Control Updating Period Monitoring In Industrial PLC-based Fast MPC: Application to The Constrained Control of a Cryogenic Refrigerator
François Bonne, Mazen Alamir, Patrick Bonnay
In this paper, a complete industrial validation of a recently published scheme for on-line adaptation of the control updating period in Model Predictive Control is proposed. The in…
Probing quantum and classical turbulence analogy through global bifurcations in a von Kármán liquid Helium experiment
B Saint-Michel, E Herbert, J Salort +15
We report measurements of the dissipation in the Superfluid Helium high REynold number von Karman flow (SHREK) experiment for different forcing conditions, through a regime of glob…