[PEPPo] HEP High Power Targetry Roadmap -- Workshop Report

[Jay Benesch]

Mostly concerned with proton beams but some of the comments about rotating tungsten and liquid metal jets may be of interest.  I hadn't thought about hydrogen embrittlement of tungsten via water cooling before seeing it herein. 

http://arxiv.org/abs/2502.03305

F. Pellemoine, K. Ammigan, C. Barbier, S. Bidhar, A. Casella, M. Calviani, C. Densham, P. Hurh, D. Kim, D. Liu, K. Lynch, S. Makimura, D. Senor, V. Shiltsev, D. Stratakis, J. Terry, K. Yonehara

    Designing a reliable target is already a challenge for MW-class facilities today and has led several major accelerator facilities to operate at lower than design power due to target concerns. With present plans to increase beam power for next generation accelerator facilities in the next decade, timely R and D in support of robust high power targets is critical to secure the full physics benefits of ambitious accelerator power upgrades. A comprehensive R and D program must be implemented to address the many complex challenges faced by multi MW beam intercepting devices. This roadmap is envisioned to be helpful to the DOE-OHEP office when planning and prioritizing future R and D activities as well as leveraging synergies across the Office of Science. The roadmap will be extremely beneficial to the broader (external to DOE HEP) HPT community by communicating OHEP s high level strategy and objectives for HPT R and D and highlighting possible opportunities for collaboration.