TCDIM François-Xavier Nuiry September 16 th 2015.

TCDIMFrançois-Xavier NuirySeptember 16th 2015

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Outlines

• TCDIM Existing design

• TCDIM locations

• TCDIM New simulations

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TCDIM Existing design

TCDIM MSI300+290+300mm long or 500mm longOD Ø100mmID Ø20mmInconel600

TCDIM MQI500mm longOD Ø150mmID losange304L

TCDIM MBIA500mm longOD Ø150mmID Ø46mm304L

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TCDIM LocationsTI2

CollimatorNew proposed location (ease integration) (m)

Mask Mask Design Location Distance collimator-Mask [m] Fluka simulation

TCDIM.20634 ? 416.56 ? TCDIV.29011 2953.25 TCDIH.29049 2972.25 TCDIM.29059 MQI (losange) 2975.733 3.483 availableTCDIH.29206 3016.5 TCDIV.29233 3028.17 TCDIM.29241 MQI (losange) 3032.171 4.001 availableTCDIH.29464 3099.17 TCDIM.29472 MQI (losange) 3101.81 2.64 availableTCDIV.29508 3108.25 TCDIM.29527 MSI 500mm long 3116.402 8.152

TI8

CollimatorLocation in Concept Design Report (m)

Mask Location Distance collimator-Mask [m]

TCDIM 81759 ? 668.97 ? TCDIH.87441 2387.665 TCDIM.87459 MQI (losange) 2396.08 Collimator and Mask to be removed during LS2

TCDIH.87606 2432.032 TCDIV.87644 2450.745 TCDIM.87658 MQI (losange) 2456.232 5.487 TCDIV.87804 2501.125 TCDIH.87822 2510.43 TCDIM.87831 MBIA 2512.73 2.3 availableTCDIH.87939 2566.345 TCDIM.87966 MQI (losange) 2576.219 9.874 TCDIV.88121 2620.897 TCDIM.88132 MSI 3*500mm 2625.125 4.228

Shall we keep masks associated to momentum collimators?

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TCDIM New simulations Beam Parameters:We only consider one bunch train 288 batchesPulse period between 2 trains 3.6s (only one impact considered)Bunch train time 7.2µs Beam Energy 450GeVParticles per train 288*2.32*1011=6.68*1013

Energy deposition layout Given by Fluka files

Considered MASKS:TCDIM.29472. Closest to collimator in TI2.

MQI Mask. Losange inner shape. 304L.TCDIM.87831. Closest to collimator in TI8.

MBIA Mask. Circular inner shape. 304L.TCDIM.29059 and 29241

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TCDIM New simulations with TA6V grade 5.

TA6V [Stress in Mpa]Linear elastic study

Titanium TA6V water quenched and tempered*, 1/s strain rate Annealed

Max Equivalent stress (VM) 400 Tensile yield strength @ 200C 860 724 @ 150C

Max Principal stress 21.5 Tensile strength @ 200C 960 845 @ 150C

Min Principal stress -468 Compressive yield strength @ 200C (static test) 539

Even if the stress level is not negligible, TA6V shall be a good candidate for this mask

TCDIM.29472 2.64m distance to the collimator 5 sigma impact on the collimator jawMax ΔT in the mask: 149ºC

Properties @ RTDensity ~ 4.42g/ccCTE ~ 8.78.10-6 /KE ~ 110.3 GPa

*trempe a l’eau puis revenu

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Titanium TA6V water quenched and tempered, 1/s strain rate Annealed


Max Principal stress 29.5 Tensile strength @ 200C 960 845 @ 150C


There are 46 degrees deference between 5 sigma and 20 sigma impact parameter



Even if the stress level is not negligible, TA6V shall be a good candidate for this maskA study with the real mask geometry shall be done to check the geometry influence on the generated stress.

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Titanium TA6V water quenched and tempered, 1/s strain rate Annealed


Max Principal stress 19 Tensile strength @ 200C 960 845 @ 150C




TA6V shall be a good candidate for this mask

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TCDIM Preliminary Conclusions (simplified model)Titanium TA6V is a good candidate for TCDIM 29472, TCDIM 29059.

MASK Material

TA6V 304L INVAR INCONEL Energy dep. in the downstream magnet coil

TCDIM.294725 σ impact parameter

OK Should be OK with the

EN1.3912 cold worked grade(old location)

High stress, need non linear

study(old location)

With TA6V mask: 35 J/cm3, ΔT~10.1CWith 304L mask: 33 J/cm3, ΔT~9.5C

With INVAR: 34 J/cm3, ΔT~10C (old location)With INCONEL: 34 J/cm3, ΔT~10C (old location)

TCDIM.2947220 σ impact parameter

OK x x With TA6V mask: 25.5J/cm3, ΔT~7.3 C

TCDIM.29059 OK x x With TA6V mask: 29 J/cm3, ΔT~8.3CWith 304L mask: 27 J/cm3, ΔT~7.7C

TCDIM.29241 Problem with Fluka

file/energy deposition?

x x With TA6V mask: 18 J/cm3, ΔT~5.2CWith 304L mask: 17 J/cm3, ΔT~4.7C

TCDIM.87831 OngoingProblem with

Energy deposition?

x x With TA6V mask: 10 J/cm3, ΔT~3CWith 304L mask: 9 J/cm3, ΔT~2.6C

Is the losange shape really needed for mask in front of MQI magnets?

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TCDIM New simulations with INCONEL

Inconel 718 wrought, solution treated and aged [stress in Mpa]Linear elastic study

Max Equivalent stress (VM) 1258 Yield strength @ 280C 1121

Max Principal stress 122 Tensile strength @ 280C 1376

Min Principal stress -1472 Compressive strength @ 900C -730

Stronger than Stainless Steel 304L.Non-linear study with bi-linear material property could give more precise results (as done for SS).Stress remains too high.Excluded candidate.

TCDIM.29472

Ni (~50%) Cr (~18%) Fe (balance)Properties @ RTDensity ~ 8.23g/ccCTE ~ 12.3.10-6 /KE ~ 198 GPa

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TCDIM New simulations with TITANIUM

Titanium Ti 13V 11Cr 3Al solution treated and aged bar [Stress in Mpa]Linear elastic study

Max Equivalent stress (VM) 333 Tensile yield strength at 200C 929

Max Principal stress 23 Tensile strength at 200C 1087

Min Principal stress -390 Compressive yield strength at 200C -946

TCDIM.29472

Acceptable stress level.Deposited energy on the downstream magnet is acceptable (thanks to G. Steele).Best candidate.

Properties @ RTDensity ~ 4.8g/ccCTE ~ 8.75.10-6 /KE ~ 106 GPa

Peak energy deposition in the downstream magnet coils, depending on the mask material

SS 304L mask Invar mask Inconel mask Titanium mask

Peak Energ. Dep on coil 35 J/cm^3 34 J/cm^3 34 J/cm^3 37 J/cm^3

Temp increase in coil 10° 10° 10° 11°

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TCDIM New simulations (EN-STI)ANSYS Model and Mesh

ANSYS MQI Simplified model (no losange shape)212784 elementsElement midside nodes droppedSOLID185 element used (8 nodes hexagonal element)26 elements radially95 elements longitudinally88 elements in PHI

Cylindrical coordinate system ID: 12

FLUKA MQI Binning:24 elements radially40 elements longitudinally180 elements in PHI

TCDIM François-Xavier Nuiry September 16 th 2015.

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