During the four years of the project, state-of-the-art detectors have been successfully designed, built, commissioned and calibrated. The Muon (g-2) straw-tracking system is able to measure the muon beam profile with an accuracy in the vertical plane of better than 10 mrad and efficiently identifies pileup and lost-muon events. The laser monitor systems of the two experiments have been built to monitor the photosensor gain, with the need for Muon (g-2) to reach an accuracy at the sub-per mil level. The Mu2e crystal calorimeter has demonstrated to provide unprecedented timing performance for low energy electrons in the presence of a strong magnetic field, exploiting solid state photosensors, and the Mu2e high-purity germanium detector (HPGe) is able to record X-rays at rates and in radiation levels surpassing previous experiments.
In the framework of the project, it is important to underline the new-born collaboration among MUSE partners for the irradiation tests at European facilities. Several dedicated campaigns took place at ELBE in HZDR and at FNG/CALLIOPE in ENEA during the action. MUSE researchers from all EU research institute, together with US colleagues, tested the radiation hardness of calorimeter components and the functionality of the HPGe detector.
The European research groups participating in the Muon Campus experiments successfully profited from the mutual exchange of skills triggered by MUSE existence, sharing and consolidating different area of expertise in advanced technologies. Notable examples are the already mentioned common work on irradiation damage, the participation of Muon (g-2) laser experts in the design of the Mu2e laser system and the transfer of knowledge on latest generation silicon photosensors for the development of detectors able to monitor online high-intensity laser plasma experiments. Besides the activities among research institutes already discussed, transfer of knowledge takes advantage from the presence of industrial partners, thus enforcing inter-sectoral exchanges.
Trainings of personnel was promoted and supported. MUSE researchers participated to 36 training courses to increase their scientific and soft skills, for a total of 64 participants. Half-day of specific training sessions on advanced topics from research development or industry were organized during annual General Meetings. Moreover, the large number of secondments to Fermilab fostered the opportunity both for young and senior MUSE researchers to come in contact with colleagues from more that 50 research institutes, in a high-quality training environment.
MUSE results have been disseminated to the scientific community through the participations to international conferences and workshops, for a grand total of 107 presentations and posters, and the publication in professional journals (49 peer-reviewed publications and more than 50 contributions to conference proceedings, all in gold/green open access). A lot of effort has been put in outreach activities. Overall, MUSE participated to more than 30 events for the general public and organized twice per year training sessions for university students. MUSE activities have been advertised on the MUSE website and press release for the general public.
