2013 04 Larp-hilumi Dose Req v4

7/28/2019 2013 04 Larp-hilumi Dose Req v4

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MQXF Preliminary Dose Requirement

G. Ambrosio, E. Fornasiere, E. Todesco

Joint LARP/CM20 HiLumi meeting

Napa Valley, CA, USA

8-10 April, 2013

The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework

Programme 7 Capacities Specific Programme, Grant Agreement 284404

Work supported by the US LHC Accelerator Research Program (LARP) through US Department of Energy contracts DE-AC02-07CH11359, DE-AC02-98CH10886,

DE-AC02-05CH11231, and DE-AC02-76SF00515


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Requirements DOSE Requirements

Coil structural req. Min shear strength

Max allowable swelling

Electrical req. Energy deposition and heat evacuation req.

Max DT

Minimum thermal conductivity Quench protection and stability req.

Minimum copper RRR

09/04/2013G. Ambrosio, E. Fornasiere and E. Todesco 2


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Elvis Fornasiere | CERN, 26th February 2013 TE-MSC-MDT

Acknowledgments: G. Ambrosio, F. Cerutti, S. Clment, L. S. Esposito, P. Ferracin, P. Fessia, R. Flukiger,

R. Gauthier, M. Juchno, A. Mereghetti, N. Peray, J.-C. Perez, G. de Rijk, E. Todesco,

Radiation resistance of

insulation systems for IR

Triplets - Summary


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4

Relative mechanical

properties for CTD-101K


Outline

Structural

req + energy

deposition

Measurement

techniques

CTD-101K +

CE-epoxy

results

1%

10%

100%

0 1 10 100Relative

mechanicalproperties(tests77K)

Absorbed dose (MGy)

CTD-101K, with 50% Vf virgin S-2 Glass

Torsional Shear Modulus

Compressive Strength

Compressive Modulus

Flexural Modulus

Torsional Shear Strength

Fracture Resistance GIC

Torsional Shear StrainShear Strength

ILSS0 120 MPa30% degradation at 50 MGy

[29]+[30]+[31]+[32]+[33]+[34]

UTS: 35% reduction at 180 Mgy from UTS0 ~ 1050 MPa

Compressive strength = 1080 MPa at 160 Mgy (Loss 20%)Fracture Resistance GIC: 66% reduction at 230 MGy

95% degradation

at 160 MGy

Plan

70% degradation

at 90 MGy


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5

Outline

Stress in the coil


Structural

req + energy

deposition

Measurement

techniques

CTD-101K +

CE-epoxy

results

Plan

~0 MPa shear

30-40 MPa sheart

t t

t

Shear stress

Max-gradient (155 T/m)

160 MPa compression stress

Azimuthal stress

Observation of Shear stress between turns and

shear between inner and outer layers


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6

Suggested plan

Internal test campaign prior to irradiation campaign (unirradiatedfibers)

SBS test of heat treated fibers with 3 resins (CTD-101K,

CE/epoxy blend, MY750) Resin with 1)virgin fiber, 2) 50h @700C fiber, 3) 50h @700C ht fiber +

ceramic binder + 4) 50h @700C ht fiber + PVA

10 off axis-test as support of SBS test

Shear/compression test of the system [cable + insulation]

Irradiation campaign (to be discussed)

What is the maximum dose level (20 MGy)?

SBS Interlaminar shear test (qualitative)

Shear/compression test of the system [cable + insulation]

(Quantitative)


CTD-101K MY750 CE

Virgin fibers

Fibers after reaction

Fibers after reaction

and ceramic binder

Plan

Outline

Structural

req + energy

deposition

Measurement

techniques

CTD-101K +

CE-epoxy

results

Tests to be performed on

samples with all features of

QXF coils


7/926 July 2012, joint WP2, WP3, and WP10 meeting

Beam screen shielding

Beam screen withW absorbers at

mid-planes

* 0.5 mm clearance between BP and W

0

20

40

60

80

100

120

140

160

180

200

25 30 35 40 45 50 55 60

MGy

distance from IP (m)

triplet integrated dose on innermost 3 mm

7.0 TeV proton per 3000 fb-1

2.3 mm W inserts7.0 mm W inserts2 mm BS + 6 mm W absorbers

7

Configurations Diameter aperture

at mid-planes (mm)

3.7 mm BP + 7 mm W inserts 114.6

3.7 mm BP + 2 mm BS + 6 mm W absorbers* 111.6

Minimum aperture requested from optics is 116 mm

To go below20 MGy one would need

2 mm BS + 9 mm W absorbers(105.6 mm residual aperture)

Maximum thickness shielding forQ1-first half Q2A tailor-made

Possible use of other materials for BS/CB

under investigationWith courtesy of F. Cerutti, L.S. Esposito on behalf of CERN FLUKA team [1]

140 mm Nb3Sn

Structural

req + energy

depositionWith 150 mm aperture

3.7 mm BP + 2 mm BS

+ 9 mm W absorber

Dose < 20 MGy


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Requirements DOSE Requirements

Coil structural req. Min shear strength < 20-40 MGy OK prelim.

Max allowable swelling

Electrical req. < 40 MGy OK

Energy deposition and heat evacuation req.

Max DT < 20-40 MGy OK prelim.

Minimum thermal conductivity

Quench protection and stability req.

Minimum copper RRR



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Max Allowable Temperature During Quench

Thot-spot < 350 K using CTD-101K

Detailed analysis in WAMSDO proceeding:

G. Ambrosio Maximum Allowable TemperatureDuring Quench in Nb3Sn Accelerator Magnets

To be confirmed by tests with high-temperaturequenches in magnets with cored cable


Documents

2013 04 Larp-hilumi Dose Req v4