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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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