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Meeting 38
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Europe/Zurich
30/6-019 (CERN)
The discussion is based on the layout provided by Mariusz (12/2/20) and integrates comments of Ugo Amaldi (UA)
- Horizontal line: room is too small
- beam dump: no need for a dedicated room. Either save space, or foresees backup space in case the gantry is larger, or put there animal facility. Still it is important to have dump for beam setting-up at the end of a line going "straight", with no bends, for safety...so perhaps animal room is not a good idea either...
- chicane after extraction "a`la HIT" not really needed
- animal facility: should be separated from all the rest, separate entrance, a lift ,etc..
- animal facility: no need to go up to 430 MeV/u, so shielding can be less. NO!, unless it is possible to prove to the safety authority that such a high energy beam cannot be sent to the room by mistake, e.g. could be done with a bend...but why limiting ourselves?
- Crane in the experimental room, movable shielding. Marco Silari is doubtful. Better have 2 experimental rooms, same size. So that one can work in one while there is beam in the other. Comment by UA in the afternoon: foresee one room dedicated to animals, small and large, and the other one is "clean".
- Corridor for the HEBT line is too large, almost same size as synchrotron (UA)
- Access to the HEBT corridor is only from one side, add door. During maintenance the heavy concrete doors shall be open.
- Baseline synchrotron should be 25m diameter (UA)
- Mimimum space around transfer line: (cfr. Linac4, see sketch in indico) need access from one side only, so it can be close to the wall, i.e. 1.5m from beam axis to the wall. On the other side, for transport, maintenance, safety need 2.5m minimum empty space (it is more from the axis).
- Mazes to access the rooms looks not enough to Marco: Labyrinth at CNAO takes much more space
Shielding:
- Supervised area everywhere!
- CNAO: 3m and even 4m in the forward direction
- EU standards from IAEA, but philosophical because there are not only dose limits, but also justifications/optimizations procedures
Pump room could be on top of the synchrotron (low occupancy area, need less shielding)
- if on top of the synchrotron there were offices or a playground the requirements are more stringent, if parking space it is again "low occupancy".
Experimental rooms:
- 2x same size, with 2 beam lines
Walls are better if they are straight: ok, but only when it is possible
Length of the Tline: depends on optics
Angles to the Tline: 45degree is a good number
Add control rooms for the treatment rooms.
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