Report from WP 11: Collimator Materials for Fast High Density Energy Deposition (ColMat-HDED) Jens Stadlmann (GSI) on behalf of Adriana Rossi (CERN) and

Report from WP 11: Collimator Materials for Fast High Density

Energy Deposition (ColMat-HDED)

Jens Stadlmann (GSI)on behalf of Adriana Rossi (CERN) and Alessandro Bertarelli (CERN)

EuCARD2 – 5th Steering Committee MeetingFrankfurt, Germany – 2 October, 2013

WP11 Task Status

WP11.1: Coordination and Communication

WP11.2: Material Testing for Fast Energy Density Deposition and High Irradiation Doses

WP11.3: Material Mechanical Modelling

Upcoming Activities and Summary

EuCARD2 SC Meeting – 02.10.2014 Alessandro Bertarelli - CERN

Outline

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• Partnership agreement with CERN (KN2045)

• Collaboration CERN with US-LARP

ColMat-HDED collaboration

ColMat-HDED partners

ColMat-HDED collaboration

WP11 Task Status


WP11.2: Material testing for fast energy density deposition and high irradiation doses

WP11.3: Material mechanical modelling



Outline

4

Alessandro Bertarelli - CERN

WP11 Tasks and Deliverables

Work Package subdivided in 4 Tasks

1. Coordination and Communication (A. Rossi and J. Stadlmann)

2. Material testing for fast energy density deposition and high irradiation doses (A. Bertarelli)

3. Material mechanical modelling (A. Bertarelli)

4. Material Specification (A. Rossi)

4 Main Deliverables

EuCARD2 SC Meeting – 02.10.2014 5


WP11 Tasks and Deliverables

Deliverables and Milestones


Achieved!Ongoing

WP11 Task Status






Outline

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Task 11.1: Status and Next Events

Novel materials presented at the 9th Tungsten, Refractory & HardMaterials Conference (Orlando – May 18-22, 2014)Upcoming: WP11 – Collimator Materials for High Density Energy Deposition – 2nd Annual MeetingProposed dates: Thursday and Friday 4th and 5th of December 2014Location: GSI, Darmstadt, DE


WP11 Task Status






Outline

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Main goal for Collimation (relevant to WP11):Design, build and install in the LHC a prototype of HL-LHC Secondary Collimator embarking novel advanced materials – 2016


Current design permits a late choice of the active jaw material

Glidcop back-stiffener

Glidcop clamps

Novel composite blocs

Brazed cooling circuit

Glidcop or Mo Housing

Courtesy of L. Gentini

TCSPM Jaw

Final validation of design and material choice through beam irradiation tests:

Long-term effects: Low/Medium energy (up to 1.14 GeV) at GSI, NRC-KI, BNL

Short-term effects: High energy (440 GeV): CERN HiRadMat facility


Task 11.2: Irradiation Tests at GSI


Irradiation campaigns at GSI:1) Feb-Mar 2014:

238U:1.14 GeV, 0.5 ms, 0.6 Hz, 4x109 ions/cm2s 208Bi: 1 GeV, 0.5 ms, 3.4 Hz, 1.2x109 ions/cm2s CuCD, CFC (2 orientations), MoGr (MG 3110P, 2 orientations, samples not annealed)

irradiated with fuences up to 1e14 ions/cm2

2) July 2014: 197Au: 945 MeV, 40 Hz, up to 2x109 ions/cm2s C: 11.4MeV/u, 5x109 ions/cm2s

Online monitoring of sample temperature with a thermal

camera – acquisition rate 2 kHz




Large amount of data gathered during the first two irradiation campaign on C/C, CuCD, MoGr; data analysis on-going

Preliminary results anticipate good behaviour of CuCD Several measurements still to be performed on irradiated samples, however

preliminary results provided valuable contribution for MoGr: 1st campaign: “as-received” MoGr. Samples deformed during irradiation at high

fluence 2nd campaign: irradiation of heat-treated MoGr (annealing at 1150˚C / 1300˚C - 4

hours). Lower deformation on samples treated at higher temperature.

Temperature on the samples during irradiationDeformation of “as received” samples at

different fluencies




3) October 2014 campaign (on-going): Irradiation with Sm ions MoGr samples treated @1800˚C for 50 min prior irradiation! Treatment possible also on larger blocs (e.g. active jaw inserts)

4) November 2014 and beyond: High-energy laser irradiation Same or improved thermal treatment as 3rd campaign, on the basis of previous results

Observed deformation is possibly due to the release of internal stresses cumulated during material sintering

A high-temperature, slow treatment prior to irradiation relieves the internal stresses

Beneficial effects substantially improve with HT temperature


Task 11.2: Irradiation Tests at BNL


2013/2014 Runs 200 MeV proton irradiation @BLIP

Irradiations conducted during 2013 (4.5 weeks) and 2014 (3 weeks)

Spallation neutron irradiation @ BLIP Beam time: 7th March – 31st July 2014

28 MeV proton irradiation @ Tandem

E. Quaranta (CERN PhD Student) currently participating to measurements and data analysis at BNL

15EuCARD2 SC Meeting – 02.10.2014 Alessandro Bertarelli - CERN

Task 11.2: HiRadMat 23 Experiment

Final material choice on the basis of the material resistance to particle beam impacts

HRMT23 test (approved by HiRadMat Scientific Committee): “Assess impact consequences on jaws components after intense proton irradiation”

Three superposed collimator jaws in one tank Experiment main goals:

Determine the threshold of damage of the jaw materials

Integrally test under LIU/SPS beam train HL-LHC collimator jaws

Jaws equipped with embarked instrumentation for online acquisition

Special tank equipped with viewports for optical remote acquisition (LDV and high-speed camera)

16EuCARD2 SC Meeting – 02.10.2014 Alessandro Bertarelli - CERN

Task 11.2: HiRadMat23 test

Tests currently scheduled in spring 2015 Jaw materials envisaged:

Molybdenum-Graphite Copper-Diamond Carbon-fiber-reinforced Carbon AC-150K

WP11 Task Status






Outline

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Several tests performed in 2014 for the thermo-mechanical characterization of novel materials

CERN:

Thermal characterization with advanced machines recently purchased (Differential Scanning Calorimeter, Dilatometer and Laser-Flash)

Quasi-static mechanical measurements of the elastic matrix and the elasto-(pseudo)plastic material behaviour

Politecnico di Torino:

State-of-the-art dynamic tests of the material hardening/softening as a function of strain, strain rate and temperature (Hopkinson bar setup)

All data acquired are being used to build the material models for the numerical simulation of particle beam impact against collimator jaws



Task 11.3: Measurements at CERN


Temperature range: Troom up to 2000 ˚C (lower limit -180 ˚C with ad-hoc setup)

Laser-Flash: thermal diffusivity, specific heat and thermal conductivity

Dilatometer: Coefficient of thermal expansion

Laser-Flash

MoGr fibres⊥MoGr // fibres

MoGr thermal conductiv

ity up to 770 W

/m/K

(Twice pure Cu!!)


Task 11.3: Measurements at CERN


Dilatometer

CTE measurements: measurements performed in the two directions, after heating/cooling cycles

Dotted lines: CTE

Continuous lines: linear expansion

MoGr // fibres, CTE MoGr fibres, CTE⊥

Excellent th

ermo-mechanical stabilit

y of MoGr

CTE~1E-6 K-1 between T room

and 2000˚C!


Task 11.3: Tests at PoliTo


2 high speed video cameras (max 1 Mfps) and 1 VISAR (Velocity Interferometer System for Any Reflector), PVDF sensors

Within EUCARD2 to improve testing facilities a new high speed camera and a VISAR were acquired

Dynamic tensile/compressive tests on Molybdenum


Task 11.3: Numerical Simulations at CERN


From material characterization…

…to numerical modelling and beam-impact response advanced simulations

Temp (˚C)

Temp (˚C)

MoGr jaw, 6.4E13p @440GeVTmax<Tmelt(2540˚C)

CuCD jaw, 6.4E13p @440GeVTmax>>Tmelt(1083˚C)!!

Molten region!

WP11 Task Status




WP11.4: Material Specification



Outline

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Alessandro Bertarelli - CERN 24EuCARD2 SC Meeting – 02.10.2014

Summary and Perspectives

WP11 is successfully continuing on the work path defined at 1st Annual Meeting.

2nd Annual Meeting planned for early December at GSI.

Very intense and challenging program, driven not only by EuCARD2 deadlines but also by “hard” machine-related constraints (full LHC Collimator with new materials to be installed around 2016 …).

1st Milestone (Irradiation of first samples) completed. Preliminary results show good behavior of CuCD and provided valuable input for MoGr development (high temperature annealing introduced to remove residual stresses).

Excellent progress towards milestones 2 and 3.

MAT-X workshop at GSI in November 2014

Material development and characterization continued: outstanding thermo-physical properties measured and confirmed at CERN.

Additional significant contributions from PoliTo and BNL.

Comprehensive experiment to test full-scale HL-LHC collimator jaws at HiRadMat approved and expected by Spring 2015.

THANK YOU FOR YOUR ATTENTION!

Thank you for your attention!




Light Gasgun for Taylor, flyer-plate and ballistic impacts tests

2 high speed video cameras (max 1 Mfps) and 1 VISAR (Velocity Interferometer System for Any Reflector), PVDF sensors

Within EUCARD2 to improve testing facilities a new high speed camera and a VISAR were acquired

Courtesy of L. Peroni




Brittle failure in high strain-rate tensile tests (over 103 s-1) High Strain-rate

sensitivity

2 Grades: • Mo1 (Plansee)• Mo2 (AT&M)Metals produced via powder technology could exhibit brittle behaviour especially at high strain-rates probably due to the change of failure mechanism between ductile damage and trans-granular fracture. These aspects must be deeply investigated.

Courtesy of L. Peroni

Documents

Report from WP 11: Collimator Materials for Fast High Density Energy Deposition (ColMat-HDED) Jens Stadlmann (GSI) on behalf of Adriana Rossi (CERN) and