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Machine and cryostat integration: first thoughts on issues for 11T+collimator assembly in the DS zones. V.Parma, CERN, TE-MSC. CERN , 12 June 2013. Dispersion suppressor zones, our playing ground.

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V parma cern te msc

Machine and cryostat integration:first thoughts on issues for 11T+collimator assembly in the DS zones



CERN, 12 June 2013

Dispersion suppressor zones our playing ground
Dispersion suppressor zones, our playing ground

P1, after LS1: bus-bars QF and QD stop after Q11  easier integration in QTC. Much easier if done in LS3 (DFB on surface)

P5, same as P1

P7, similar to P3

CERN, 11 October 2011

Relevant machine integration issues
Relevant machine Integration issues

In case trims needed:

  • Spare 600 A SC wires (3 pairs of spools)

  • But no spare current leads in DFBs (spares only in IR 4,6)

    • Modify to add new current leads?  complex (?) in-situ work

    • Use an existing unused circuit?  to be checked

      IR 1 & 5:

  • After LS1, QF and QD bus-bars stop after Q11: easier busbars routing through 11T+Collimator assy

    IR 7:

  • If 11T+collimator during LS2 can be coupled to displacement of DFB+SC link (R2E): easier integration of additional 600 A leads

V parma cern te msc

M1, M2


Sketch of a possible layout
Sketch of a possible layout

15’660 (IC to IC plane)


~6’214 (LCM)

~6’214 (LCM)








Fixed support

Sliding support

B-Bar Expansion lyra



B-Bar Fixed point

External jack

* Experiencefrom QTC bus-bars routing

Timeline for ls2
Timeline for LS2

11 T + collimators assy ready for installation

1st 11T proto 2-in-1

(c.f.r. M.Karrpinen’s talk)

11 T + collimators assy testing

11 T + collimators cryostat assembly

Cryostat procurement

11 T + collimators cryostat Engineering & Design

Preliminary study

Latest start of Engineering & Detailed design

Cm cryostat integration work
CM/cryostat integration work

Preliminary study (up to end 2013)

  • 3-D modeling with existing designs of components (see my table, 1st column)

  • Study CM-specific bus bars integration inside end caps and along magnet:

    • routing of M1,M2 (no need for Pt1,5!) and lyras

    • M3 routing, connections, diode and connections, lyras

  • Study for MQ-dipole-dipole and dipole-dipole-MQ slots

  • Study inter CMs busbars routing line and connections

  • Study CMs cryostat assembly and tooling

     Assess integration complexity and identify areas for length optimisation, needs for specific development, plan engineering and design effort from 2014 onwards

Cryostat specific issues
Cryostat specific issues

Start from and possibly preserve (as far as possible), from LHC and QTC designs:

  • Vacuum vessel external envelope:

    • impact on tunnel passage, and transport

  • Thermal shield bottom tray design (see QTC design)

  • M1-3 bus bars routing lines

  • Standard interconnects

     we need to involve an LHC experienced designer (obvious names in mind)

Qtc assy drwg
QTC assydrwg

V parma cern te msc

DFBA in Pt 2

DFBAs at P2 are also feeding Q6