4th Interaction region design meeting

Name: 4th Interaction region design meeting
Start: 2025-07-11T11:30:00+02:00
End: 2025-07-11T13:20:00+02:00
Location: CERN

Friday 11 Jul 2025, 11:30 → 13:20 Europe/Zurich

6/2-008 (CERN)

6/2-008

CERN

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Meeting Minutes – Injection Region Design
Date: 11/07/2025
Participants: Patric, Jim, Justin, Daniel, Marlene
Next Meeting: 31/07/2025

1. EDMS & Documentation

EDMS link for sharing drawings (https://edms.cern.ch/ui/#!master/navigator/project?P:1002757716:101807714:subDocs) is functional and in use.

2. Upstream Pipe and Sextupole Interference

Despite adding the extension pipe upstream of the injection dipole, a clear aperture conflict remains (radius 7.5 cm, Ø135 mm pipe) with the sextupole.
Action: Eleonora and Marlene to consult P. Schwarz regarding the possibility of removing (shaving off) 2.5 cm from the sextupole.
Could consider making the vapor source narrower?

3. Expansion Volume in Beamline

Estimated space requirement: 30 cm (to be confirmed via thermal simulations).
Apertures: Two apertures are preferred. No modifications expected post-installation; aperture plate can be thick.
Shutters: May be needed. Number of operational cycles to be defined.
Action: Eleonora, Marlene to send the electron beam envelope to Jim.
Note: The gap in this region is very small (~30 cm).
Action: Jim, Eleonora, Marlene check the distance between the last magnet and the focus.

4. Corrector + BPM Integration

Concern: Does the corrector + BPM assembly fit within the available 250 mm space, including vacuum connection interfaces?
Action: Integration check required to ensure compatibility.
Action: Eleonora, Marlene to confirm with BI if possible

5. Plasma Extension Region

Current distance between the two plasma cells: ~3.349 m.
This distance was/is already in the CAD sent to GWA by Nicolas, so no change wrt that CAD
Action: Marlene to discuss feasibility with Edu and present an update at the next CSCP meeting.

6. MPP Machine Shop Support

Discussion: Identify which components can be fabricated by the MPP Machine Shop.
Note: A possible visit to GWA in Munich was mentioned.

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