ELENA IIC Meeting 19 05 16 NEG coating
- Slides: 11
ELENA IIC Meeting 19 -05 -16 NEG coating issues Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 2
Dipole chamber #1(AD_VCBCK_0001) Coating setup Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 3
Visual inspection after NEG coating NEG peel-off on the bellow (only one side of the chamber) No NEG peel-off on the body Proposed solution for this chamber: removal of the peel-off Next step: NEG acceptance test Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 4
NEG acceptance test - 230 o. C for 24 hr NEG peel-off on bellows & manchettes (both sides of the chamber) No NEG peel-off on the body Proposed solution for this chamber: removal of the NEG peel-off Proposed solution for future chambers : Masking of bellows & manchettes (Ready – Coating on W 19) Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 5
LNR chambers & test coating on bellows Coating setup Chambers: • Electron drift chamber spare (masked bellows) • Chamber from Trinos (with bellow) • Chamber from Trinos (no bellow) • Bellow scraper • Reduction DN 100 -63 H- monitor Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 6
LNR chambers & test coating on bellows – Visual inspection after NEG coating No NEG peel off on bellows/chambers NEG peel-off on the welding area (one side) Electron cooler Drift chamber only Proposed solution: Remove NEG peel-off, Perform NEG acceptance test (Bellow scraper & El. cooler chamber) Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 7
Further actions • Finalizing acceptance test for Electron cooler drift chamber (W 20 -21) • Visual inspection of the chambers(W 21) • NEG coating of LNR chamber (batch #1 + #2, ready to be coated W 21 -22) Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 8
ELENA ZQNA chambers Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 10
Peel-off chamber VA (aluminium) Peel-off occurs only between the weld bellow-tube and ~ 2 cm inside the tube. Weld bellow-tube Vacuum, Surfaces & Coatings Group Technology Department 03 October 2020 A. Sapountzis 11
