Welcome by LNF Director

• Pierluigi Campana (LNF)

Room: Aula Bruno Touschek

Muon Production Challenges for High Energy Physics Applications

• Mark Palmer (BNL)

Room: Aula Bruno Touschek Muon accelerators offer unique potential for high energy physics applications. Muon storage rings can provide pure, well-characterized and intense neutrino beams for short- and long baseline neutrino-oscillation studies, thus providing unmatched measurement precision for key parameters such as the CP-violating phase and a sensitive probe for new physics. The large muon mass means that muon beams are not subject to the synchrotron radiation and beamstrahlung limits imposed on electron-positron colliders. Thus, muon beams can be efficiently accelerated to TeV-scale energies and stored in collider rings where the beams can interact for many revolutions. The crucial challenge, however, is producing sufficiently intense beams of muons with acceptable emittance to achieve these goals. This talk will provide an overview of the issues associated with the production of muon beams having the necessary emittance.

Discussion Room: Aula Bruno Touschek

Development of a Next-generation High-intensity Muon Beam at the Paul Scherrer Institut (CH)

• Felix Berg (ETH Zürich)

Room: Aula Bruno Touschek The quest for the Intensity Frontier by future muon experiments is a global challenge, which has led to the development of a variety of muon sources around the globe, meeting the contrasting demands of such experiments. A brief overview of experimental requirements, existing muon beam lines and future plans is given. The status of the design study for a new High- intensity Muon Beam at the Paul Scherrer Insitut in Switzerland, aiming for surface muon beam intensities of O (10/10) per second will be presented.

Discussion Room: Aula Bruno Touschek

Design, construction and operation of beam intercepting devices (targets, collimators, dump/absorbers) at CERN

• Marco Calviani (CERN)

Room: Aula Bruno Touschek CERN operates a large number of beam intercepting devices in its accelerator complex, including particle-producing targets, beam shaping collimators, absorbers and dumps. These devices must be able to reliably operate when subjected to continuous beam impacts under regular and accident conditions, with extremely high deposited energy densities and high average power. In this framework, the EN/STI Group carries out the conceptual design, detailed design, procurement, assembling, operation and maintenance of these devices. In this contribution, the speaker will detail the type and design characteristics of relevant beam intercepting devices and will focus the attention on devices with low-Z materials. An outline on the ongoing devices being built and assembled in the framework of the Large Hadron Collider Injectors Upgrade (LIU) and for the High-Luminosity HL (HL-LHC) Projects will be provided. R&D activities carried out in the Group, including material characterisation, beam impacts at the HiRadMat facility and radiation damage studies will be presented. Challenges of future projects requiring the next generation beam intercepting devices will be addressed.

Discussion Room: Aula Bruno Touschek