On 9 May 2019 the Local Acceptance Review (LAR) for the 4MOST Detector Systems was held at ESO in Garching. The LAR is the final official milestone for facility subsystems, where the hardware is formally accepted, compliance with requirements and (not the least) documentation is reviewed between the 4MOST Project Office and the delivering partner, in this case ESO. The 4MOST Detector subsystem encompasses not only the 9 science-grade CCDs in their dewars, but also readout electronics and the complete cryo-vacuum system. A spare science-grade CCD and two engineering-grade CCDs are also part of the deliverables.
The performance of the CCDs is excellent, exceeding requirements in almost all areas, and the delivery schedule is very well aligned with the rest of the project. During the LAR, Joar Brynnel stated on behalf of the 4MOST project that this has been a very successful collaboration, not only from a technical/performance perspective, but it has also been carried out in a very productive and collaborative spirit.
Jeff Pirard (ESO) added: “The LAR also gave the opportunity to warmly thank Jean-Louis Lizon, Gero Rupprecht and Roland Reiss, all three retiring in 2019. They have strongly contributed to the success of the 4MOST Detector System development. The Detector System LAR is a first step of 4MOST subsystem completion which shall open the path for system integration at AIP in the coming months. The project is moving forward. Science data are getting closer!”