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WP2: Status meeting #21
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Europe/Zurich
865/1-D17 (CERN)
WP2: Status meeting
Zoom Meeting ID
61901825630
Host
Aleksandr Gorn
Passcode
72105413
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Laurie, Alex, Matt, Fabian, Florian, Mike, Rui
Round Table
Alex - Investigation of how to do offset in MADX as to compare with the sweep in BDSIM. Able to apply corrections to component strengths (nominal momenta) in each position to represent the momentum sweep. Implementation for tracking with MADX-PTC also demonstrated. Will compare to BDSIM to cross-validate both approaches.
Fabian - temporary optics with just final quads to give more realistic final focus size while we wait for the P42 optics. Used to investigate references trajectories with parts of TT24 / P42 ramped with the momentum sweep or not. With current optics, there is a sweep in position due to parts of the beamline being ramped and other bits not being post-LS3. For example, the splitters in TT20 and the T4 wobbling magnets will never be ramped. This induces a change in trajectory through P42 during the spill. We will look at solutions to minimise this.
Laurie - P42 survey updated due to updated numbers for gravitational level at BDF from Camille.
Matt:
- note Muon Shield Workshop - 14th May.
- SHiP collaboration meeting first week of June
- BLM function spec starting to be written.
- Interlock functional spec drafted.
- Experimental requirements nearly finished.
- Minimum beam size has been checked with Fabian.
- Need to understand how P0 survey will work post-LS3.
Mike
- scenarios required to provide inputs for the target and beam instrumentation requirements
- simulations show a temperature and stress limit each
- for the (conservative) double dilution system failure (static point suddenly), the shortest time before exceeding the limits is 160ms.
- for a swee radius of 34, 42, 50mm, 42mm is above the allowed temperature limit. 34mm was above the stress limit allowed.
- a larger target diameter would reduce the stress in the target for a give sweep radius.
- but ultimately, the larger sigma is the most beneficial change
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