“…At the Laboratoire de Cristallographie, we began our activity in this ®eld in 1993 by performing the ®rst experiment on an in-vacuum diffractometer, initially designed for test multilayers with soft X-rays (Tonnerre et al, 1993). Based on our experience through different collaborations, we have developed a dedicated large-volume diffractometer designed to work under high vacuum, at low temperature and with a reasonably high magnetic ®eld.…”