LHC Experimental Vacuum Systems Status October ‘07 Ray Veness For the project team (AT-VAC, TS-MME, with many thanks to the experimental teams)

Introduction and Contents Last presentation 19 June 07 ATLAS installation VAX installations Contents VAX zones ATLAS ALICE CMS LHCb Installation summary Budget and Schedule LEMIC 16 X 07 Experimental Beampipes - R.Veness

VAX Zones Overview Issues Status Consists of beamline components between experiment and Q1 plus gas injection system in IR1L, IR2R, IR5L Part of the experimental vacuum sector, used for pumping and venting sectors (ex.LHCb) Issues Very limited access in ATLAS and CMS Limited installation window between triplet repairs and machine sector cooldown Co-activity with survey, triplet repairs and warm magnet commissioning Integration conflicts with survey have led to modifications of injection and pumping lines in IR1 and 5 Status 2 fully complete (IR5R, IR8R) 2 commissioning this week (IR2R, IR8L) 2 installation in progress (IR1L, IR5L) 2 to be done (IR1R, IR2L) Beam line components IR5L VAX zone in IR1L LEMIC 16 X 07 Experimental Beampipes - R.Veness

ATLAS VI installation and Alignment Installed VI was integrated in the PIXEL package in SR1 from Dec ’06 The PIXEL and VI were installed together at the end June ’07 … and aligned The VI was nominally centered within the PIXEL package during integration After installation it was re-surveyed, then re-positioned using the specially developed laser alignment system LEMIC 16 X 07 Experimental Beampipes - R.Veness PIXEL and VI installation

ATLAS VA Installation (x2) VA-A side and C-side installed VA-A Installed from C-side, passing through the ID bore VA-C installed from an extension to the PIXEL installation scaffolding VA-A in the ID bore LEMIC 16 X 07 Experimental Beampipes - R.Veness VA-C in transport box during positioning VA-A in the Barrel – endcap gap

Installation Status: VT VT installed A and C sides VT support rails installed in JTT and tested July ‘07 VT chambers inserted inside JTT, but not mounted on rails – just resting on the JTT bore LEMIC 16 X 07 Experimental Beampipes - R.Veness VT and support rails in JTT Working platform for VT and TAS operations

ATLAS Remote flanges and Interface plates TAS flange A and C installed Mechanical components mounted on the TAS absorber, mechanical and leak detection successfully completed Interface plate A and C installed Plate positioned on beam axis with aid of TS-SU During this operation, it was found that both monoblocks (and hence TAS) are further than nominal from the IP: 29mm on A-side and 21 mm on C-side Actions As TAS is a machine element, F.Butin is circulating an NCR for approval with the recommendation to ‘use as-is’ Lateral alignment of the TAS is also required – F.Butin will coordinate Preparation for leak testing of TAS and remote flange Installation of interface plate Positioning of interface plate LEMIC 16 X 07 Experimental Beampipes - R.Veness

ATLAS VAX Sectors IR1L installed (A-side) IR1R (C-side) Cabling Equipment between TAS and Q1 installed and leak tested Gas injection lines installed, but will be modified due to interface issues with survey Gas purifier box to be installed on HO structure, A-side, level 6 (meeting area) week 46 IR1R (C-side) Equipment here to be installed from week 43 Cabling Additional cabling for Gas Injection and VAX bakeout will be routed into the ATLAS cavern Gas injection lines installed over the Q1 in IR1L LEMIC 16 X 07 Experimental Beampipes - R.Veness

Connection of VI to VA VA-A, VI, VA-C connected All three chambers were bolted together on 27/8/07 Pumping equipment was positioned below the TE, and connected with long (~8m) flexible hoses Chambers pumped overnight to reduce pressure background, then leak tested No leaks (on flanges) with sensitivity of ~2x10-10 mbar.l.s-1 Pumping equipment as installed LEMIC 16 X 07 Experimental Beampipes - R.Veness Pumping line on VA (non-IP end) Connection of VI to VA

Status of Bakeout Cable Routing in UX 40 cables, total length 1.4 km pulled 100% cables pulled for beam vacuum Connector attachment 100% complete TX1S patch panel PP2 patch panel LEMIC 16 X 07 Experimental Beampipes - R.Veness

Vacuum Instrumentation Routing in UX 28 cables, total length 1.9 km pulled 100% cables pulled for beam vacuum Connector attachment 70 % complete TX1S patch panel To US 15 LEMIC 16 X 07 Experimental Beampipes - R.Veness

ATLAS Remaining Tasks Testing Installation Commissioning Testing of bakeout circuits in the cavern Chambers must be under vacuum and circuits heated Integration and testing of LUCID with the VJ chamber in B.927 (in progress) Installation test of the VJ chamber in the cavern (Nov ’07) Full integration test of ATLAS reserve chambers in 927 Installation Opening and closing of the e-cal around the VA chamber Delicate operation, as the chamber must slide inside the detector Installation and alignment of VA fixed supports Requires ATLAS small wheel to be in place Connection and alignment of VT chambers Requires VA to be in final position Installation, connection, alignment and test of VJ chambers Requires ATLAS Toroid and VT to be in final position Commissioning Gas injection system – Scheduled for week 46 Final chamber commissioning VJ support cone being modified for LUCID supports (16 Oct ’07) LEMIC 16 X 07 Experimental Beampipes - R.Veness

ALICE Recent activities Remaining activities Transfer of central beampipe from Installation and Bakeout Shell to final supports Transfer VAX on IR2R to final configuration Temporary supports were installed to allow RB26 commissioning without the Q1 in place Now moved to final configuration, and gas injection lines modified Beryllium beampipe in ITS with last section of installation and bakeout shell Remaining activities IR2R VAX sector Commission VAX sector and re-pump gas injection system (in progress this week) RB24 and IR2L VAX sector Install and Commission VAX sector (scheduled from week 44) Install and commission RB24 copper chambers and supports ALICE want to delay this until 2008? LEMIC 16 X 07 Experimental Beampipes - R.Veness

CMS Recent Activities VAX 56-side Installation complete, finalising leak testing 54-side beamline equipment being installed Gas injection and pumping lines being modified Beam line components IR5L LEMIC 16 X 07 Experimental Beampipes - R.Veness Shielding closure tests

CMS Remaining Activities Integration testing in 927 Mechanical and bakeout test of the assembled forward chambers has been prepared in B.927 Tests will start next week Installation in the cavern Waiting for a window to install the 54-side forward chamber and remote flange Remaining chambers (Central, 2x endcap, 2x HF, 2x CT2) installed in 2008 LEMIC 16 X 07 Experimental Beampipes - R.Veness

LHCb Remaining Tasks A1R8 VAX sector A1L8 Sector (including VAX) Sector complete and commissioned in Aug ’07 A1L8 Sector (including VAX) Installed and leak tested, commissioning this week LHCb magnet test Beampipe position monitored during test Gas Injection System Control system being transferred to definitive rack Installation of VELO detectors Beampipe and detector volume under ultra-pure Neon Will open 29/10 to install detectors, then pump, leak detect and re-fill with Ne Leak between detector and beam volumes mean opening time must be minimised Need to ensure better than 10-5 mbar in detector volume to prevent early NEG saturation Leaking VELO boxes will be replaced by LHCb Access for VELO detector installation LEMIC 16 X 07 Experimental Beampipes - R.Veness

Installation Summary ALICE – 80% complete ATLAS – 60% complete RB24-side chambers and some follow-up on central region remain RB24 in 2008? ATLAS – 60% complete 5/7 chambers installed, 3/7 connected, 1/7 aligned Extensive permanent cabling is well advanced 1 / 2 VAX zones installed Remaining installation in 2008 CMS 10% complete 1/9 chambers installed 2/2 VAX zones well advanced Bulk of installation in 2008 LHCb 95% complete Installation of VELO detectors and some minor tasks remain LEMIC 16 X 07 Experimental Beampipes - R.Veness

Budget and Schedule Schedule and resources for remaining operations Major installation work in ATLAS and CMS will not be complete until at least March ’08, according to the latest experimental schedules Installation of ALICE RB24 sector may also be pushed to 2008 As schedule is not well defined, we need to keep flexibility for FSU support Request 50% contribution from experimental budgets Budget and manpower planning for 2008 AT/VAC budget and manpower plans are being made for 2008 Need information from experiments for possible detector openings in 2008/9 shutdown LEMIC 16 X 07 Experimental Beampipes - R.Veness