WP3: Proton Complex


ESS will coordinate the Workpackage and will provide the overall coordination of the activity and the communication of its results. It will monitor work progress and inform the project management and work package participants (UU and CERN), monitor the WP budget and use of resources and prepare internal and deliverable reports.


This work package aims to define the most promising scheme for the linac, accumulator and compressor rings and prepare a comprehensive summary of the current technology and possible R&D topics of importance for the proton complex. A self-consistent parameter set will be developed to determine the input beam conditions for the muon complex, based on known technological limitations.


Task 3.1
High power linac (CERN)

The goal of this task is to collect the parameters that can be used for a future design of a high-power H- Linac to be used as the driver of the proton complex. This collection will be based on inputs from ESS and the SPL/LINAC4 designs and may include: source type, preliminary acceleration layout, beam dynamics and stability considerations and chopping schemes. Consideration will be given of the need for additional acceleration after the linac in order to reach the required beam power. The parameters will be used to provide input on final beam parameters for task 3.2. CERN will be leader of this task bringing its experience in the design of the CERN LINAC4 and SPL and H- sources. ESS will bring expertise in high power hadron linac design.

Task 3.2
Compressor ring design (ESS)

The goal of this task is to provide a self-consistent collection of parameters to be used in the design of a future compressor ring. The ring will create the high intensity short bunches that will be delivered to the target for muon production. With the input of WP4 (target and cooling) and task 3.1, a set of beam parameters will be defined. A preliminary design of the rings will be developed including accumulation and compression strategy, preliminary lattice and injection and extraction considerations. Further R&D needs will be outlined and eventually beam measurements at CERN or other facilities might be proposed. Preliminary study of intensity-based effects such as space charge, single-bunch and impedance effects will be carried out for the compressor ring. ESS will lead this task and bring expertise in lattice design and beam dynamics. UU will bring expertise in lattice design and RF. CERN will provide further lattice design expertise. ESS will hire a postdoc for this task and share the supervision with UU.