Integrated SystemsJ . Kerby

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Reference Documents Inner Triplet FS (LHC LQX ES 0001 30 20)

Functional Overview Component Manufacture Machine Optics Cryogenic System Electrical Systems Absorber systems

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Reference Documents Inner Triplet FS points to:

Typically IS exists for each

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Reference Documents LQXA Functional Spec

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Reference Documents LQXA Interface Spec

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Assembly Procedures Triplet Components installed IP end first, building out

Tunnel space, shielding, and detector interfaces limit access Interconnects and end closures follow Procedures initiated at FNAL; tuned / improved and

translated after warm fit up experience

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Load Transfer Alignment Requirements for the LHC Low-Beta Triplets (LHC-G-ES-

0016, 2002). Main points concerning supports: CERN supplies jacks, cups and other equipment for installation to the tunnel

floor. Lateral load specified as 1 ton No reference to vacuum load (assumed taken up by the tie-rods).

Decision to use PMPS jacks for the inner triplets (2004?) Jacks designed to take loads up to 8 tons

Specification for the motorization of the PMPS jacks (IT3200, 2004) Lateral load specified as 1.3 tons

Anchor specification (date?) Lateral load specified as 5 tons

All cases referred to assumed vacuum loading

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Load Transfer Need for reaction of vacuum loads noted at Cryostat

Conceptual Design review (1999) An action item from the Cryostat Interim Design

Review in 2000 Concern on number of tie bars (2 to 3 recommened) Concern on protruding into the aisle

Stability of tie rods under vacuum noted at Engr Design Review (2001)

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Load Transfer Tunnel jacks assumed to take no load in shear

for purposes of tie bars Full Q1-Q2-Q3 vacuum load (~78kN) reacted

through tie bars to DFBX and to ground

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Load Transfer 4 M30 tie bars at each interconnect

Vacuum bellows contribution excluded In Q1-Q2 & Q2-Q3 interconnects stiffened at

intermediate location Stress in tie bars ~27MPa, nominal (ear deflection

to be considered) System successfully tested in Bat 181 Apr 2005 Measurements on deflections at ears during Apr

2005 corroborated by analysis

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Load Transfer Ear deflection for

vacuum load approx 0.52mm linearly scaled from Q1-Q2-Q3 model used for analyzing failure mode

42.7kN

R = 525.8mm

0.1mm

0.1mm

1.14mm

R = 467.4mm

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Vacuum Loads Measurements have also been taken in IR8R Resonable agreement w/ calculation when

including the stiffness of the jacks