Discussion with users about impact on experimental beamlines

Thursday 9 Apr 2026, 13:00 → 13:30 Europe/Zurich

20260408_design_status.pdf

20260408_design_status.pptx

Present: Katerina Chrysalidis, Hanne Heylen, Liss Vasquez Rodriguez, Tim Lellinger, Guilherme Correia, Laura Lambert, Tiago Nico, Vincent Barozier, Carlotta Porzio

• Kati presents slides (attached to this indico page) describing the latest RILIS platform integration 
• Note that in slide 1 guardrails are not shown in certain areas (platform attaching to EBIS platform), but they will be present
• Kati: what will be the typical access needs to the COLLAPS ion source? Liss: the ion source will need to be accessed only in LS periods, and hopefully it will be able to run for more than one running period each time
• Liss asks about plan to replace large pieces of beamline equipment like quadrupoles below the new concrete platform. Kati says it can be done by EN-HE by taking it away sideways (considering that there is enough removable/disassemblable equipment in the surrounding); it won’t need to be removed from above with the crane
• Update on status of work at COLLAPS by Liss: the old COLLAPS ion source has already been dismantled. Need to mount new Faraday cage – pieces should come next week, and should be assembled before 27/04, even if maybe not in its final position. Ion source parts will be assembled in a clean room and installed at ISOLDE at a later time. 
• Temporary scaffolding installation to cover beamlines:
• Might result in not being able to accessible areas around COLLAPS beamline, as despite work could be done below the scaffolding, maybe pillars might hinder access to certain areas? 
• Scaffolding needed mainly for concrete pouring – so should be in place for 4-6 weeks and can be removed in the COLLAPS area afterwards, to allow for ion source commissioning
• Ed needs 4 weeks of work in the hall for the commissioning, flexible with time; deadline is December
• Ed will need the lasers for doing spectroscopy to commission the ion source
• Pouring 20-cm concrete floors: need to wait for it to dry before proceeding with other works. 
• Tiago says that in 1 week it should dry up; it might take up to 28 days if wall needs to be erected over it.
• Luis previously asked Kati: is there an interest in changing concrete block position between GLM/GHM? Changes could happen now that the green cage is dismantled and before installation of the new RILIS (concrete) platform. 
• Guilherme says that as they adapted to this wall position for the past 25 years, it’s the easiest to keep the wall position as is.
• Guilherme: need to consider as GHM hotspot not only the collection point, but also the end of the beamline. Kati points out that the concrete wall/floor should cover the RILIS office, while the concrete “wall” close to the first layer platform (where the stairs arrive) covers people passing there.
• Guilherme: Will the cable tray be installed again at GHM? Kati: Yes, it can be.
• Laser safety issues (for proximity of people standing on the platform to the COLLAPS laser box): can add a metal screen to the guardrail to not interact with the beampipe/opening the black box.
• Agreed solutions for the RILIS design/integration:
• Orange pillar (see slides by Kati for colours) will be moved back as much as possible to clear COLLAPS
• Launch of COLLAPS conflict: solved. Trying to increase distance by 10-15 cm by moving the pillar under the landing platform
• ECR will show the updated drawings
• Kati will add Liss, Guilherme, Juliana as checkers to the ECR