hq02 plans for assembly
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HQ02 Plans for assembly. Helene Felice 02/15/2013 HiLumi Meeting HQ Program. Outline. Magnet overview. HQ02 Assembly plan - Key focus areas. Assembly: timeline. Overview of the HQ magnet parameters. - PowerPoint PPT PresentationTRANSCRIPT
Helene Felice
02/15/2013HiLumi Meeting
HQ Program
HQ02Plans for assembly
H. Felice 2
Outline
• Magnet overview
• HQ02 Assembly plan - Key focus areas
02/15/2013
• Assembly: timeline
H. Felice 3
Overview of the HQ magnet parameters
4.3 K 1.9 K
Typical Iss 17.3 kA 19 kA
Gradient at Iss 195 T/m 213 T/m
Peak Field at Iss 13.6 T 14.8 T
Stored energy at Iss 0.9 MJ 1.1 MJ
Fx per octant per unit length at Iss 2.7 MN/m 3.15 MN/m
Fy per octant per unit length at Iss -3.9 MN/m -4.7 MN/m
Fz per magnet end at Iss 1.06 MN 1.28 MN
In absence of HQ02 short sample limit, the HQ01e numbers will be used as references in these slides
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H. Felice 4
Structure and assembly steps overview
Collar-pack assembly• 4 collars bolted against the full length G10 keys• Shimming of the alignment key to ensure contact between
collar and keys
Coil-pack assembly• 4 pads bolted around the collars
Final assembly and loading• Master/bladders and Keys stack is prepared based on coil-
pack assembly • Insertion of the coil-pack in the yoke shell sub-assembly by
sliding on the bottom masters• Insertion of the side and top masters • Masters include load keys and bladders + pull shims
Key parameters to watch• Preload level• Alignment: collar and key must be in contact• Preload uniformity
Collar pack assembly
Coil-pack assembly
Bladder slot Master
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H. Felice 5
HQ02 Azimuthal Preload Target
02/15/2013
Conservative Target preload ~ 200 T/m
Target Preload at 300 K:• eq shell / pole = 863 me / -450 me• sq shell / pole = 66 /-63 MPa
Target Preload at 4.2 K:• eq shell / pole = 1905 me / -720 me • sq shell / pole = -169 / -147 MPa
Room temperature preload transfer function
H. Felice 6
Focus area # 1: Alignment (I)
Different transfer function depending on:• collar / key contact or absence of contact
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Room temperature preload transfer function
H. Felice 7
Focus area # 1: Alignment (II)
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• HQ01a-b: no alignment• HQ01c-d-e: alignment• Importance of key/collar shimming• Use of pins and feeler gauges to quantify gaps
Different transfer function depending on:• collar / key contact or absence of contact
Room temperature preload transfer function
H. Felice 8
Focus area #2Preload distribution and uniformity
Previously HQ assemblies and previous LARP magnets exposed the importance of matching the coil OD to the collar/pad ID
• Preload distribution on the coil OD can be controlled by adjusting the radial shims• Attempt to correlate with CMM measurements
• Adjustment made using Fuji pressure sensitive film during collar pack assembly• 2 IR collars available
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H. Felice 9
Focus area #2Preload distribution and uniformity among coils
HQ01d HQ01e
sθ = -43 20 MPa sθ = -62 6 MPa
ExcitationCoil 8
Assembly Assembly
ExcitationCoil 8
Adaptive shimming made based on coil pole SG readings improved preload uniformity among coils
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H. Felice 10
Focus Area #3
• Apply a conservative preload to avoid degradation
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H. Felice 11
HQ02 Preload Target summary
Conservative Azimuthal Target preload ~ 200 T/m
Target Preload at 300 K:• eq shell / pole = 863 me / -450 me• sq shell / pole = 66 /-63 MPa
Target Preload at 4.2 K:• eq shell / pole = 1905 me / -720 me • sq shell / pole = -169 / -147 MPa
Axial Preloadsz rod = 60 / 160 MPaAxial preload was never an issue in HQ
• Fuji paper used to evaluate ideal radial shimming
• Adaptive shimming is a possible option if spread between SG is larger than 10 MPa
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H. Felice 12
Timeline
02/15/2013
By the end of the week: coil arrangementWeek of 02/18/2013:Iteration on collar pack assembly
Week of 02/25/2013• Coil pack finalized• Electrical QA of the coil-pack• Coil pack insertion in the yoke-shell sub-assembly• Coil end-shoe preparation for axial pushers and bullets
Week of 03/04/2013• Azimuthal and axial Preload
Starting week of 03/11/2013• Electrical QA before pizza-box assembly• Pizza-box assembly• Instrumentation prep for testing at FNAL• …
Additional Material
H. Felice 14
Coil pole SG during assembly
HQ01c
HQ01d
HQ01e
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H. Felice 15
Shell SG during assembly
HQ01c
HQ01d
HQ01e
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H. Felice 16
HQ01d Coil sq distribution
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H. Felice 17
HQ01 baseline
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H. Felice 18
Azimuthal HQ01a Preload Targets
• Initial preload target based on Gss = 219 T/m at 19.6 kA (design values)
• Targets: • eq shell = 1028 me at 300 K and 2086 me at 4.2 K• eq pole = -536 me at 300 K and -828 me at 4.2 K
In terms of stress• sq shell = 78 MPa at 300 K and 185 MPa at 4.2 K• sq pole = -76 MPa at 300 K and -159 MPa at 4.2 K
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