Álvaro Marchena
A5082975395- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Fusion materials and technologies
- Spacecraft Design and Technology
- Spacecraft and Cryogenic Technologies
- Particle Accelerators and Free-Electron Lasers
- Electromagnetic Compatibility and Measurements
Broadcom (Spain)
2024
Various models of ionization and fission chambers for ionizing radiation detection, designed to operate under harsh conditions such as those found in fusion reactors or particle accelerators, have been experimentally characterized numerically simulated. These were calibrated using a photon beam the X-ray spectrum. Irradiations performed at Biomedical Research Center University Granada (CIBM) with bipolar metal-ceramic tube operating voltage 150 kV dose rate ranging from 0.05 2.28 Gy/min. All...
Abstract The Linear IFMIF Prototype Accelerator (LIPAc) is designed to accelerate 125mA of deuteron beam 9MeV in continuous wave (CW). superconductive RF Linac has not yet been installed and the final accelerating stage now under commissioning RFQ. This system developed by INFN (Italy) before installation QST (Japan). RFQ longest World with its 9.8m requires power injection from 8 independent synchronized coupler ports. LIPAc demonstrated acceleration at 5MeV for 1ms a 1s repetition period...
The eight-chain RF system and radio frequency quadrupole (RFQ) linac were successfully integrated at the facility of Linear IFMIF Prototype Accelerator (LIPAc). We achieved an unprecedented high current deuteron beam up to 55 mA in pulse operation ($300~\mu \text{s}$ , 1 Hz). keys success (1) understanding reflected power from RFQ system, (2) tuning each chain individually, (3) intensive conditioning for holding stable RFQ, (4) optimizing loading compensation control. Interestingly,...
The International Fusion Materials Irradiation Facility- DEMO Oriented Neutron Source (IFMIF-DONES) is a scientific infrastructure aimed to provide an intense neutron source for the qualification of materials be used in future fusion power reactors. Its implementation critical construction DEMOnstration Power Plant (DEMO). IFMIF-DONES unique facility requiring broad set technologies. Although most necessary technologies have already been validated, there are still some aspects that introduce...
The key system to know the neutron and gamma fields during commissioning at IFMIF-DONES facility will be STart-Up Monitoring Module (STUMM), which include tens of very sophisticated miniaturised detectors providing crucial information about radiation fields. In particular, there MFCs (micro-fission chambers), ICs (Ionisation Chambers), SPNDs (Self-Powered Neutron Devices) GTs (Gamma Thermometers). current state-of-the-art does not provide answers performance in specific working conditions...
Design, development, manufacturing, and test activities of the RF power system (RFPS) for Linear IFMIF Prototype Accelerator (LIPAc) were completed in Europe. Installation commissioning carried out at International Fusion Materials Irradiation Facility-Engineering Validation Engineering Design Activities (IFMIF/EVEDA) site Rokkasho, Japan. Challenging requirements led to a number innovations during design development. Commissioning required major effort on calibration fine setting...