ELENA Vacuum chambers and vacuum activities IIC meeting

ELENA – Vacuum chambers and vacuum activities IIC meeting 30 -06 -2016 G. Riddone (contribution from A. Sapountzis, A. Sinturel) 1

Vacuum chamber productions • EN-MME – – – – • LNR Dipole vacuum chambers LNI Y-vacuum chamber LNI quadrupole vacuum chambers LNI dipole vacuum chambers LNR inj-ejection vacuum chambers LNS: AD_VCPAB 0001 - AD_VCPAC 0001 LNE 50: Following green light on 9 June, the production of the 4 LNE 50 chambers have been launched: VCDCU/CX/CW/CV Trinos – All other straight chambers for LNR, LNE 00, LNE 50, LNI and LNS • Details available at – https: //espace. cern. ch/TEVSCgroup/Projects/ELENAWP 25/Shared%20 Documents/Procurement%20%20 Validation%20 Test/VF%2 C%20 ST%2 C%20 NEG%20 and%20 AT%20 follow-up. xlsx? Web=1 2

Production by EN-MME Fabrication completed • LNR Dipole vacuum chambers • LNI Y-vacuum chamber • LNI quadrupole vacuum chambers • LNI dipole vacuum chambers • LNR inj-ejection vacuum chambers • LNS: AD_VCPAB 0001 - AD_VCPAC 0001, leak test W 26, available for installation W 27 Fabrication under way • LNE 50: following green light on 9 June, the production of the 4 LNE 50 chambers have been launched at the main workshop: VCDCU/CX/CW/CV 3

Production by Trinos 2 nd batch x 8 AD_VCDCE 0001 x 1 AD_VCDCF 0001 x 1 AD_VCQAP 0001 x 2 AD_VCQBJ 0001 x 2 AD_VCDME 0001 x 1 AD_VCDBQ 0001 x 1 • last batch x 6 VC upstream and downstream the fast valves, on the way to CERN DAI finally approved, production at Trinos, shipped to CERN • 3 rd batch x 13 AD_VCDCI 0001 x 1 AD_VCDBU 0001 x 1 AD_VCDBV 0001 x 1 AD_VCDBW 0001 x 1 AD_VCDBY 0001 x 1 AD_VCDBZ 0001 x 1 AD_VCDCS 0001 x 1 AD_VCDDB 0001 x 1 AD_VCDBR 0001 x 1 AD_VCPAA 0001 x 1 AD_VCDBX 0001 x 1 AD_VCSPB 0001 x 1 AD_VCSPA 0001 x 1 • NEG done, installed or available for installation 1 st batch x 12 AD_VCDBS 0001 x 1 AD_VCDCG 0001 x 2 AD_VCPIB 0001 x 1 AD_VCXBA 0001 x 2 AD_VCLBA 0001 x 2 AD_VCPQA 0001 x 1 AD_VCXBB 0001 x 1 AD_VCXAA 0001 x 1 AD_VCQBK 0001 x 1 NEG done, installed or available for installation • 4

Production by Trinos He test (80%) NEG coating (batch 3 no NEG) Acceptance test (1 per batch) Batch 1 Batch 2 5

Production by Trinos He test (80100%) NEG coating Acceptance test (1 per batch) Batch 3 (No NEG) 6

NEG coating • LNR dipole vacuum chambers – #1 to 3: 3 coated, 1 under acceptance tests – #4 to 6 : NEG coating 26 and 27 • Scraper bellows: – 2 bellows with NEG successfully tested (no peel-off) • LNR chambers TRINOS – RUN #2 successfully coated, no peel-off at bellows or welding – RUN #3 successfully coated, no peel-off at bellows or welding • Y-chambers x 3: – x 2 NEG coated, under acceptance test – x 1 NEG coating W 26 -27 7

NEG coating • PU SCHOTTKY (Responsible: Jorge Sanchez Quesada) – 4 chambers received (weight ~80 kilos each, very fragile) – optical inspection of the 4 chambers have dust, projections, metallic shavings, oxidation, scratches and white spots. – Mechanical removal of the oxidation rejected by EN-MME due to high risk of damaging bellows – ACTION: alternative method to be found by EN-MME. then degreasing (to avoid the trapping of chemical residuals) and finally NEG coating (week 28) • BPM for Tune (Responsible: Joel Albertone) – After the acceptance test there is peel-off (dust-like). – The electrodes were coated in another lab than the vacuum tanks. – We are unable to confirm by eye if the peel-off is coming from the chamber only or/and the chamber – ACTION: remove NEG dust, perform a second acceptance test to identify the presence or not of the NEG on the vacuum chamber (week 26): results to be confirmed but they are rather positive 8

Acceptance tests • See also SP site: https: //espace. cern. ch/TE-VSCgroup/Acceptance. Tests/_layouts/15/start. aspx#/Lists/Acceptance%20 tests%202/All. Items. aspx Underway • BTV tank with NEG • Kicker tank with extra pumps: test made, no improvement, leak detection under way In the pipeline • Y- Chambers (2+1): available for testing end of June W 27 • LNR dipole chambers: 1 chamber per week W 25 to 27. • SEM chambers: – one chamber alone was tested and is conform after cleaning. – But the full assembly is not conform and showed some hydrocarbons pollution before bake out, test finished end of the week 26 with final results • Trinos vacuum chambers: – set #2 with NEG W 23 (1 chamber tested) – set#3 with NEG W 24 (1 chamber tested) 9

Other components • Supports for dipole chambers – Problem wit raw material, VSC contacted several CERN colleagues to obtain it – At CERN mid of July (to be confirmed by EN-MME) • Fast valves – Already at CERN, received on 28 June 10