Specific Synchrotron Radiation Facilities Users Community (SpRUC)

This study group provides a forum for users requiring scattering spectroscopy techniques with MeV-level energy resolution and nm?1-level momentum resolution across a broad range of fields, including solid-state physics, materials science, and earth sciences. This technique has been utilised in the aforementioned fields and has been listed as a relevant beamline in respective field-specific research groups. However, no user group specialising in high-resolution inelastic scattering techniques existed from a technical perspective. The primary activity objectives of this research group are as follows:

1. Exchange of information on mutual utilisation methods
   Users employing this technique span a wide range of fields and have advanced their research independently. We will discuss the problems each faces, primarily from a technical perspective, exploring solutions and future prospects.
2. Sharing information on beamline status and proposals for advancement
   During the 2021 beamline reorganisation involving IXS and NRS, there was no forum to consolidate the opinions of users of this technique. Recognising this, we will share the problems faced by these users, future developments, and requests to the facility, facilitating discussions for future beamline enhancements and the SPring-8 upgrade.
3. Discussion on complementary use of other beamlines
   While this technique provides unique information on atomic dynamics, completing research solely with these measurements is challenging. We will discuss complementary use with other beamlines, such as structural evaluation of samples (BL02B1, BL04B2, BL10XU, etc.) and element-specific vibrational measurements (XAS beamlines, BL35XU-NRS).
4. Sharing information on domestic and international trends
   Beamlines capable of performing X-ray inelastic scattering experiments with sub-meV energy resolution are limited worldwide. Information sharing will cover the current status of equipment at overseas synchrotron radiation facilities and the types of research themes being pursued.
5. Outreach activities for potential users of the technique
   By disseminating research results using this technique and gathering information on new developments, we will identify potential research fields and users. Furthermore, we will serve as a point of contact for welcoming inexperienced researchers.