Managing the group, the team members and the budget with the aim of delivering the following systems:- up-to 33 High Voltage klystron modulators of SML topology to power up the accelerator klystrons;- more than 300 power supplies for the accelerator magnets;- 26 RF power stations for the accelerator Spoke RF cavities;To achieve these goals, the following main roles and responsibilities were undertaken:- Responsibility for the direct management of a total budget of ~67… Show more Managing the group, the team members and the budget with the aim of delivering the following systems:- up-to 33 High Voltage klystron modulators of SML topology to power up the accelerator klystrons;- more than 300 power supplies for the accelerator magnets;- 26 RF power stations for the accelerator Spoke RF cavities;To achieve these goals, the following main roles and responsibilities were undertaken:- Responsibility for the direct management of a total budget of ~67 MEuros;- Management of In Kind Contribution agreements (third party laboratories from different European countries) for the delivery of a substantial part of the series equipment required (negotiation, analysis of strengths, weaknesses and opportunities);- Development and construction of high power test stands as part of the strategy for pre-testing these systems before installation, following all relevant safety standards and best practices:a)- Test Stand 1, of about 350m2, 250kVA, aimed at testing the SML pulsed power supply prototype described below;b)- Test Stand 3, of about 450m2, 700kVA which replaced Test Stand 1, aimed for testing all series pulsed power supplies and RF power stations, before being installed in the gallery, and also for troubleshooting and repair activities. Show less

From Jan. 2013 to Oct. 2020, I was the head of the Power Converters section, Accelerator Division, at the European Spallation Source – ESS in Lund, Sweden, and the group leader of the Electrical Power Systems from Oct. 2020 to Dec. 2022. The group has been in charge of the design, development, procurement, testing, installation, commissioning and operation of the majority of power supplies and RF power stations required to power up the ESS accelerator.To this effect, the group leader was… Show more From Jan. 2013 to Oct. 2020, I was the head of the Power Converters section, Accelerator Division, at the European Spallation Source – ESS in Lund, Sweden, and the group leader of the Electrical Power Systems from Oct. 2020 to Dec. 2022. The group has been in charge of the design, development, procurement, testing, installation, commissioning and operation of the majority of power supplies and RF power stations required to power up the ESS accelerator.To this effect, the group leader was responsible for the direct management of a budget of about 67 M€ and a team of 11 persons in order to successfully provide ESS with a set of power supply systems representing about 85% of the total electrical power consumption of the site. These systems included namely:- the 33 High Voltage and multi-MegaWatt pulsed power supplies for the RF klystrons, representing a total installed peak power in excess of 200MW, weighing cumulatively around 180 tons, representing a total volume of ~550m3 of sophisticated power electronics;- the 26 RF power stations based on tetrodes for the spokes section of the Linac, representing a total installed RF peak power of 10.4MW, weighing cumulatively around 45 tons and representing a total volume of ~220m3. Show less

Working as 25% part-time, seconded from ESS (European Spallation Source):- Supervision of several Master Thesis in electrical engineering and power electronics;- Supervisor of a PhD thesis on the subject of "Design and Control of Long-Pulse High-Power Klystron Modulators" for the ESS accelerator;- Technical Director for the HV klystron modulators R&D project:Due to nonexistence of a solution in the market compatible with the extremely demanding requirements of ESS and to its… Show more Working as 25% part-time, seconded from ESS (European Spallation Source):- Supervision of several Master Thesis in electrical engineering and power electronics;- Supervisor of a PhD thesis on the subject of "Design and Control of Long-Pulse High-Power Klystron Modulators" for the ESS accelerator;- Technical Director for the HV klystron modulators R&D project:Due to nonexistence of a solution in the market compatible with the extremely demanding requirements of ESS and to its inherent technological challenges, an R&D project was launched for a High Voltage and High Power (115kV, 2.3MW, pulsed) pulsed power supply (klystron modulator). The development was based on a novel topology that would be conform to and even exceed the ESS baseline requirements. I was then leading a collaboration with LTH, as from May 2013, in order to closely direct this ambitious R&D project, leading ultimately to the design, construction and validation of the klystron modulator reduced scale prototype based on the so-called novel SML (Stacked Multi-Level) topology. Show less

R&D in Power Electronics and Teaching in Electrical EngineeringFrom 2009 to 2012, I was appointed as assistant professor in Electrical Engineering, Power Electronics, first at “Instituto Superior Tecnico, Lisbon, Portugal, and secondly at Laval University, Quebec city, Canada. During this period I was lecturing different courses in Electrical Engineering and Power Electronics, while leading R&D projects in the fields of power electronics for power quality enhancement… Show more R&D in Power Electronics and Teaching in Electrical EngineeringFrom 2009 to 2012, I was appointed as assistant professor in Electrical Engineering, Power Electronics, first at “Instituto Superior Tecnico, Lisbon, Portugal, and secondly at Laval University, Quebec city, Canada. During this period I was lecturing different courses in Electrical Engineering and Power Electronics, while leading R&D projects in the fields of power electronics for power quality enhancement applications.The main academic activities included lecturing on power electronic courses to the best students of Montreal and Quebec universities, selected to form the IGEE (Institut de Genie Electrique et Electronique), in Montreal. This institute was owned and funded by the biggest electrical engineering companies present in Quebec like Alstom, HydroQuebec, ABB, etc.).In parallel to these academic activities, I was a consultant for CERN on a study, assisted by detailed simulation models, of a resonant multi-level topology for the klystron modulators of the new SPL (Superconducting Proton Linac) project.I was also a consultant for the newly born European Spallation Source (ESS) project in Sweden with the main objective of evaluating the worldwide market on long pulse klystron modulators and launching a call for tender for the procurement of a first unit, including technical specification, advise on technical offers, follow-up of construction and factory acceptance testing. Show less

R&D in Power Electronics and Teaching in Electrical Engineering

During the second stage at CERN, as head of Pulsed and High Voltage Power Converters section, I was leading a team of engineers and technicians responsible for the development, construction, commissioning, maintenance and operation of a park of about 500 power supplies, most of them high power (up-to 5MW) and high voltage (up-to 100kV), both pulsed and DC for different types of magnets, including superconducting, and RF amplifiers. I was also in charge of the development of high voltage pulsed… Show more During the second stage at CERN, as head of Pulsed and High Voltage Power Converters section, I was leading a team of engineers and technicians responsible for the development, construction, commissioning, maintenance and operation of a park of about 500 power supplies, most of them high power (up-to 5MW) and high voltage (up-to 100kV), both pulsed and DC for different types of magnets, including superconducting, and RF amplifiers. I was also in charge of the development of high voltage pulsed klystron modulators for the new accelerator project Linac 4 and of the unique switch mode power supplies for the Gamma Transition of the PS accelerator, the last ones yielding to a substantial reduction on particle losses at transition.In parallel to this “on the field” technical work, I was responsible for the management of the whole section in terms of personnel, budget, documentation, interfaces, safety, technical and development strategies. As section leader, I was also in charge of several R&D projects aiming at the design, development, procurement, installation, testing, commissioning and operation of different new types of highly complex power supply systems, most of them unique at CERN and at a worldwide level. In total, more than 100 power supply systems of 7 different types were developed internally under my direct responsibility, produced and installed; all projects being successfully achieved within the allocated budgets, within the schedule timeline and complying with the technical and quality requirements. Show less

Design, Testing, Installation management, Commissioning of Power Converters for Particle AcceleratorsFrom June 2001 till Sept. 2006, I was with CERN, Power Converters group, in Geneva, Switzerland, as a project engineer.I have contributed to the contract follow up and Factory Acceptance Testing of large thyristor rectifier high power supplies for 3 of the 4 LHC experiments (CMS: +/-26V/20kA-529kW, LHCb & ALICE dipoles: 900V/6.5kA-5.8MW, each one). Later on, I was appointed as lead… Show more Design, Testing, Installation management, Commissioning of Power Converters for Particle AcceleratorsFrom June 2001 till Sept. 2006, I was with CERN, Power Converters group, in Geneva, Switzerland, as a project engineer.I have contributed to the contract follow up and Factory Acceptance Testing of large thyristor rectifier high power supplies for 3 of the 4 LHC experiments (CMS: +/-26V/20kA-529kW, LHCb & ALICE dipoles: 900V/6.5kA-5.8MW, each one). Later on, I was appointed as lead engineer for the Site Acceptance Test and commissioning of these power supply systems on their real loads, having had the privilege of leading the very first powering up campaign of the large detector magnets for these 3 experiments.I was also lead engineer for the upgrade of the existing (20+ years old) power supply for the ALICE detector solenoid magnet (160V/33kA - 5.3MW), the largest power supply at CERN in terms of rated current.Moreover, I was lead engineer and project manager for the development of a series of high power switch mode power supplies (IGBT based) for the consolidation of some of the existing accelerators within the PS complex, ranging from a few tens of kW to 1 MW (LEIR, PFW, B8 series). In particular, I had the privilege of being in charge of the engineering design and in-house development of the most powerful switch-mode power converters at CERN at the time (B8, 2 power supplies, 4-quadrant, 1MW rated power each). Show less