Conveners
Special Technologies: Beam vacuum system conceptual design I (review)
- Paolo Chiggiato (CERN)
Special Technologies: Beam Vacuum System Conceptual Design II (review)
- Francis Perez (ALBA Synchrotron - CELLS)
Special Technologies: Injection & extraction I
- Peter Levai (Hungarian Academy of Sciences (HU))
Special Technologies: Injection & extraction II
- Ursula Helga Van Rienen
Special Technologies: Beam stoppers, collimators and dumps (review)
- Brennan Goddard (CERN)
Special Technologies: Electronics & instrumentation (review)
- Federico Ravotti (CERN)
Special Technologies: Development of new manufacturing technologies
- Said Atieh (CERN)
Special Technologies: Machine protection, circuit and powering
- Jan Uythoven (CERN)
The technical design concept for the FCC-hh cryogenic beam vacuum system was developed based on the constraints that emerge from the arc design requirements. Within this framework, a BEam Screen Testbench Experiment (BESTEX) measurement setup was designed with the goal of determining the photodesorption yield, synchrotron radiation heat loads and photo electron generation inside 3 different...
In FCC-hh one of the most challenging issue will be the control of all possible instabilities that could occur. In order to do so, all vacuum vessel inner surfaces need to be characterised in great details. Among others properties, their Secondary Electron Yield (SEY), Photo Yield (PY), Reflectivity (R) and their capability to adsorb residual gas molecules and maintain them absorbed during...
HTS coatings have recently been proposed for beam impedance mitigation in the FCC beam screen. One of the candidate materials that can still work under the exceptional conditions of 50K, 16T, above 10^5 A/cm^2 is the Tl cuprate TlSr2Ca2Cu3Ox (Tl-1223) that with a Tc of about 120 K, very high Hc2 and Hirr, and moderate anisotropy is a promising material for such application. This possibility is...
Non-evaporable getter coating of vacuum chamber of particle accelerators was invented approximately 20 year ago by C. Benvenuti at CERN. This technology have already demonstrated its benefits an many machines: ESRF, Elettra, Diamond, Soleil, LHC, MAX-IV, etc. The NEG coatings are very effective vacuum solution, the UHV/XHV conditions could be reached in fully coated vacuum chamber of particle...
A bulk superconducting magnetic shield can create the sharp transition between the high-field and no-field zones of septum magnets. This technique promises to reach significantly higher fields than what is possible with current technology, without compromising compactness. The experimental results with three different shield materials will be presented and compared. Simulation results...
To safely and reliably extract the high energy FCC-hh beam is a challenge for the extraction and dilution kicker system and has a major impact on the design. A high segmentation is proposed for both the extraction and the dilution kicker magnets to reduce the impact of one erratic module and to enable operation with less than nominal kick strength. The main challenge for the extraction kicker...
FCC will require a significant amount of electronic components in the accelerator tunnel and in the side galleries to control and monitor different systems, e.g. power converters, QPS, interlocks, etc. An “a priori” evaluation of the radiation environment, the technology that would be required, the failure rate and the possible mitigation actions become strategic for the design, the future...
Radiation effects on electronics pose a serious threat to the operation of a high-energy hadron accelerator such as the present LHC and future FCC-hh machines. In particular, Single Event Effects (SEEs) are the result of the interaction of a single particle with the sensitive volume of a component that compromise its operation and can even result in its permanent destruction in the case of...
Particle detectors for high-energy physics applications can contain billions of MOS transistors, each of them prone to possible radiation-induced failures. The Future Circular Collider represents an unprecedented challenge to the radiation hardness of CMOS technology, with an estimated total ionizing dose (TID) from 10 to 500 times higher than the already very high TID expected to be reached...
Current solid-state devices for radiation measurement are not capable of integrating the radiation levels expected in certain sectors of the FCC tunnel (tens of KGy with >1015 particles/cm2) and even more in the experiments of the FCC (tens of MGy, with >1017 particles/cm2). In order to overcome these measurement limitations, we have focused our research on metal nanolayers, as a solution for...
Additive manufacturing technology and its applications steadily grew from the niche product to the multipurpose manufacturing solution, which today is being applied in many fields of mechanical engineering and machine building technologies. In particular laser cladding proved its high efficiency, precision and economic benefits in repair sectors of aerospace, automotive and ship repair...
Intelligent robotic systems are becoming essential for inspection and measurements in harsh environments, such as the European Organization for Nuclear Research accelerators complex. Aiming at increasing safety and machine availability, robots can help to perform repetitive or dangerous tasks, reducing the risk of personnel exposure to radiation and the time for interventions. In this work, a...
Quench protection systems are an indispensable asset for the safety and integrity of the components of the FCC superconducting circuits. This contribution focuses on the quench detection (QDS) system. A design study for the QDS proposes main processing units located outside the FCC tunnel and interconnected with high-speed data links to intelligent sensors with reduced complexity and hence...
An alternative energy extraction system of the FCC superconducting circuits capable of energy recuperation is proposed. This system is suggested to comprise a converter module, which by controlling the extraction voltage across the magnet chain will determine the energy extracted and transferred to a temporary storage unit, before being re-used e.g. for the following energy ramp. The...
For the success of the FCC, one of the key aspects is the energy efficiency. In particular, the magnet powering could represent an enormous power consumption from the AC network, therefore achieving an optimised and efficient design for all power converters is a primary concern.
In this presentation, the main concepts and requirements for the power converters for the dipole magnets of the FCC...
