Matthew Moulson for the LAV Working Group NA62 Photon-Veto Working Group Meeting CERN, 11 December 2012 LAV construction & installation status

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Summary: Where we stand 2 A1-A3Installed, cabled, read-out in technical run A4-A8Installed, ready for cabling A11At CERN, ready to install A9 & A10 Vessels under construction at Fantini Bananas under construction at Frascati

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 A1-A3 cabling 3 Thanks to Frascati technicians for excellent cable routing!

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 A9-A10: Status of vessels 4 Progress on A9: Vessel rolled and welded Turning of interior on vertical lathe in progress, will finish today End flanges in forged 304L have been prepared on lathe End flanges welded by mid next week (19/12) Pieces in 304L (manhole covers, external supports) sent out for solution treatment (heating) to reduce magnetic permeability Preliminary vacuum test week of 07/01/13 Other progress: A10 vessel rolled Dedicated, enclosed area at Fantini set up for work with stainless steel New set of rotation bars ready, awaiting test

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Rolling of A9 vessel 5

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Rolling of A9 vessel 6

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Welding tests for stainless steel 7 Thanks to C. Capoccia

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Welding tests for stainless steel 8 Thanks to C. Capoccia Welds obtained with TUBE S 964 G are mechanically and structurally good Magnetic properties of 304L similarly unaffected, like for 304LN (μ/μ 0 = 1.05 both before and after welding)

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Work in progress in Frascati 9 A9: 60 of 60 bananas ready A10: 2 bananas ready blocks ready Continue to produce of new blocks

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Modifications for type 9 blocks (A10) 10 Mu-metal housing for PMT is longer for type 9 blocks Small modifications to: Banana hardware Cable routing Cover for oven increase depth 125 mm narrower support

LAV construction status – M. Moulson (Frascati) – Photon Veto WG – CERN – 11 December 2012 Conclusions 11 Schedule for delivery of A9 and A10 vessels slipped slightly due to experimentation with weld filler material Expect A9 vessel to be delivered week of 11 March 2013 A9 banana assembly complete A10 banana assembly will be complete before A10 delivered