1. Interconnection work for the the QRL cryogenic extensions Ivo Slits - AT/CRI 20.02.2006

2. Ivo Slits, AT/CRI-ci, 21.02.20062 Introduction A cryogenic extension allows to link the QRL jumpers to different clients (DFBA, DFBL, Q6, ACS). The diameter of the cryogenic extensions is 355.6 mm

3. Ivo Slits, AT/CRI-ci, 21.02.20063 Introduction They are composed of several interconnection pipes (between 4 and 9 pipes) with different internal diameters (from 10 mm to 80 mm) Interface of the cryogenic extension element QRLXD (sector 8-1) Interface of the cryogenic extension element QRLXE (sector 8-1)

4. Ivo Slits, AT/CRI-ci, 21.02.20064 Introduction Type, number and location

5. Ivo Slits, AT/CRI-ci, 21.02.20065 LHC Underground Sites Cercle vert: rallonge cryogenique 2x

6. Ivo Slits, AT/CRI-ci, 21.02.20066 Activities and responsibilities Design and Manufacturing of elements and external supports => Airliquide Installation of ext. support and elements=> AT-ACR Interconnection => AT-CRI Leak-testing => AT-VAC Final testing (leak/pressure/cold test) => AT-ACR Note: supply of welding rings for internal tubes and MLI (Jehier) is AT-CRI

7. Ivo Slits, AT/CRI-ci, 21.02.20067 Fabrication QRLXD Cryogenic extension HCQRLXD100-AL000001

8. Ivo Slits, AT/CRI-ci, 21.02.20068 Fabrication Cryogenic extension QRLXD Element HCQRLXD100-AL000001

9. Ivo Slits, AT/CRI-ci, 21.02.20069 Fabrication QRLXE Cryogenic extension HCQRLXE100-AL000001 Element HCQRLXE101-AL000001 Element HCQRLXE102-AL000001 Element HCQRLXE103-AL000001 Element HCQRLXE104-AL000001

10. Ivo Slits, AT/CRI-ci, 21.02.200610 Fabrication Cryogenic extension QRLXE Element HCQRLXE103-AL000001 Element HCQRLXE101-AL000001

11. Ivo Slits, AT/CRI-ci, 21.02.200611 Engineering design Straight and elbow pipes are in Invar material The extremities of each interconnection pipes are equipped with Stainless Steel tubes Most of cryogenic extensions have no active thermal shield. Each interconnection pipe is equipped with MLI. Only cryogenic extensions QRLXF and QRLXH (linking ACS) have active thermal shield. The vacuum envelope is in Stainless Steel. The number of elements composing one cryogenic extension can vary from 1 to 4 elements. Interconnection pipes are supported inside the vacuum envelope with spacers The thermal losses per meter is around equal to ~ 1.5 W/m. External interconnections are made with rigid sleeves. Horizontal cardan compensator on QQS jumper side. Flexible hoses are added on Q6 and DFBA side for the cryogenic extensions QRLXD, QRLXA, QRLXC, QRLXK and QRLXL.

12. Ivo Slits, AT/CRI-ci, 21.02.200612 Interconnection design & procurement Status

13. Ivo Slits, AT/CRI-ci, 21.02.200613 Flowdiagram interconnections 1 jour

14. Ivo Slits, AT/CRI-ci, 21.02.200614 Interconnection Interfaces Interfaces »Interconnections : welding : same interface type as standard jumper connection >12/10 mm >17.2/15.2 mm >22/20 mm >33/30 mm >380mm (lèvre) Some are different (QRLXK/DFBA) >102mm x 2 (lèvre) >59mm x 2.5 (lèvre) MLI : 30 layers on each interconnection pipe

15. Ivo Slits, AT/CRI-ci, 21.02.200615 Example interconnection drawing (QRLXD)

16. Ivo Slits, AT/CRI-ci, 21.02.200616 Example interconnection drawing (QRLXD)

17. Ivo Slits, AT/CRI-ci, 21.02.200617 Planning (1)

18. Ivo Slits, AT/CRI-ci, 21.02.200618 Planning (2) Planning (supplied by R. Girardot on 19.10.2005)

19. Ivo Slits, AT/CRI-ci, 21.02.200619 Resources Resources needed for following activities: Welding (automatic & manual) Assembly (MLI, thermal shield) Working platforms for accessibility

20. Ivo Slits, AT/CRI-ci, 21.02.200620 Remaining points Safety (work at altitude +- 3.5m) Installation Procedures Welding qualifications / trials Workpackage?