Conveners
FCC-ee injector: Top-up, booster, pre-injector layout and linacs
- Alexej Grudiev (CERN)
FCC-ee injector: e+ source, DR, transfer lines, and P3
- Iryna Chaikovska (CNRS/IJCLab)
In this contribution we will give an overview of the status of the design of the pre-injector complex and introduce the new layout that has been proposed by the study group working in the context of the CHART collaboration. A summary of the injector parameters focusing on the most challenging ones for the different injector sub-systems will also be presented.
In this presentation, I will give an overview of the beam dynamics simulations done to optimize the design of two of the linacs in the FCC-ee injectors’ complex. The first one accelerates electrons from 200 MeV up to 1.54 GeV, and for both electrons and positrons from 1.54 GeV up to 6 GeV. In particular, I will focus on some of the possible mechanisms of single-bunch emittance degradation and...
The linacs of the FCCee injector complex will both provide the drive beam for position production and accelerate nominal electron and positron beams up to 6 GeV. Several linacs comprise different traveling-wave structures fulfilling the beam dynamics and RF constraints. High-phase advance large-aperture structures accelerate the positron beam at low energies. All structures are rotationally...
The presentation shows a simulation and optimisation of the FCC-ee positron source using a high-temperature superconducting (HTS) solenoid as the matching device to collect positrons downstream of the target. The conventional target scheme composed of simply a single tungsten is used. The target is placed inside the bore of the HTS solenoid to improve the positron yield. The position of the...
For an electron-positron collider like FCC-ee, the production of positrons plays a crucial role. One of the design options considered for the FCC-ee positron source employs a superconducting solenoid made of HTS coils as an adiabatic matching device. A superconducting solenoid yields a higher peak field than a conventional flux concentrator, therefore increasing the achievable positron yield....
The current status of the DR design will be presented with an analysis of the impact of the timing scheme of the injection and its implication on the DR injection/extraction equipment, moreover, a review of the acceptance of the DR in the longitudinal and transverse planes will be analyzed and the implication for the positron source will be addressed.
This work presents the concept of the HTS solenoid-based adiabatic matching device for the CHART FCCee Injector study. The first results of in-house made and tested non-insulated HTS coils are shown.
The CHART P-cubed project at Paul Scherrer Institut is the proposed proof-of-principle experiment for the FCC-ee positron source. The main challenge for this study is capture and transport...
The current proposal for the FCC-ee injector complex includes separate linacs to accelerate the electron and positron beams to 1.54 GeV, followed by a common linac to bring the beams to 6 GeV. Electron and positron transfer lines will be needed to connect these elements. There will be a damping ring for the 1.54 GeV positrons, after which a transfer line will transport the positron beam to the...
P-cubed, currently in development at PSI, is the proposed proof-of-principle experiment for the FCC-ee positron source. Capture and transport of the secondary positron beam from the production target to the damping ring are a key challenge for FCC-ee, due to large emittance and energy spread. The use of novel matching and focusing methods has been studied, such as high temperature...
