1. HRMT14 – Post Irradiation F. Carra on behalf of the HRMT14 team 189 th Collimation Working Group – 20 April, 2015

2.  HRMT14 introduction  Dismounting procedure  Tests envisaged  Summary Outline 20.04.2015F. Carra (CERN EN/MME)

3. 3 Introduction F. Carra (CERN EN/MME)20.04.2015  HRMT14 (October 2012) Experiment Goals  Benchmark advanced numerical simulations and material constitutive models through extensive acquisition system  Characterize six existing and novel materials currently under development for future Collimators: Inermet180, Molybdenum, Glidcop, MoCuCD, CuCD, MoGr  Collect, primarily in real time, experimental data from different acquisition systems (Strain Gauges, Laser Doppler Vibrometer, High Speed video Camera, Temperature and Vacuum probes) Medium Intensity Tests: Sample: Ø 40 mm, L30 mm High Intensity Tests: Sample: half-moon; Beam Offset 2 mm Beam Parameters Beam energy440 GeV Number of protons per bunch 1.1e11 Bunch Spacing25 ns

4. 4 Introduction F. Carra (CERN EN/MME)20.04.2015 High Intensity Tests: Comparison between numerical simulation (SPH) and experiment Beam CaseBunchesp/bunch Total Intensity Beam Sigma Specimen Slot Velocity Simulation601.5e119.0e12 p2.5 mm9316 m/s Experiment721.26e119.0e12 p1.9 mm8 (partly 9)~275 m/s

5. 5 Introduction F. Carra (CERN EN/MME)20.04.2015 Tungsten Alloy, 72 bMolybdenum, 72 & 144 b Glidcop, 72 b (2 x) Copper-Diamond 144 b Molybdenum-Copper-Diamond 144 b Molybdenum-Graphite (3 grades) 144 b

6. 6 Dismounting procedure F. Carra (CERN EN/MME) 20.04.2015  HRMT14 table and test bench currently stored at b. 954  Dose rate at tank contact: 2  Sv/h  Dismounting planned on weeks 18-19 (b. 109)  Several people involved in the operation:  D. Aubert, P. Francon: dismounting operations  J. Tonoli: responsible b. 109  V. Tromel, K. Weiss, …: RP responsible  Y. Algoet: radioactive wastes  J.M. Dalin: US cleaning  EN/MME team to be included in the impact document HRMT14 at b. 954

7. 7 Dismounting procedure F. Carra (CERN EN/MME) 20.04.2015 ~560 ~450 ~1960 ~1600 ~900 Mass: ~250 kg (1) Tank opening  Intervention on flange with cables and connectors  Dismounting of vacuum pump and disposal of radioactive oil  Quick dismounting system at the base of the tank  2 tools used to stiffen the bellows  RP measurements at each stage!  Observation of debris conditions inside the tank

8. 8 Dismounting procedure F. Carra (CERN EN/MME) 20.04.2015 (2) Sample holder extraction and cleaning  Disconnection of sample holder from its support  Immersion of sample holder in US bath (1h – demineralised water)  Dismounting of sample holder support and temporary disposal of HRMT14 table inside b. 109  RP measurements at each stage! ~430 ~370 120 Mass: ~40 kg

9. 9 Dismounting procedure F. Carra (CERN EN/MME) 20.04.2015 (3) Extraction and package of specimens  Cutting of strain gauges cables  Dismounting of the sample holder  Extraction of specimens  Packaging in numbered bags with silica gel drier  RP measurements at each stage! 120 Graphite spacers Low energy samples

10. 10 Dismounting procedure F. Carra (CERN EN/MME) 20.04.2015 Destination of components  Material specimens: packed in numbered sleeves and stored (responsibility EN, storage point to be defined)  HRMT14 table: stored in b.954 (owner of the equipment: HiRadMat)  Remaining components (bellows, tank, supports, sample holder, flanges, vacuum pump, etc.): treated as radioactive wastes  Question: can we recover some of the components? e.g. the tank

11. 11 Future tests F. Carra (CERN EN/MME) 20.04.2015 Non-destructive tests:  Visual inspection of samples (some samples are coated with NEG, check NEG state)  Measurement of groove induced by high-intensity impacts  US, x-rays to observe internal cracks (if any)  Metrology measurements Destructive tests:  Metallographic cut and observations  Tests on NEG (peel-off, …)  to be discussed with TE/VSC (G. Cattenoz)  Preparation of specimens for thermo-mechanical characterization  …  Question: should tests be performed in a RP-controlled area?

12. 12 Summary 05.03.2015F. Carra (CERN EN/MME)  After 2 ½ years of cool-down, the dose rate is now low enough to allow dismounting on the HRMT14 test bench  Major concern is the contamination inside the tank (presence of radioactive debris provoked by the impacts)  Detailed procedure prepared with RP group so to minimize the intervention times and exposure (ALARA concepts applied)  Operation performed in b. 109, which is well equipped for this kind of interventions  The HRMT14 table will be re-used for the HRMT23 test (Summer 2015)  Extracted specimens will be packaged waiting for non-destructive and destructive tests  Remaining components will be treated as radioactive waste  Details of the successive testing campaign (where? when?) to be defined after week 19  lots of information to be acquired during the dismounting, no RP measurements available on the samples at the moment! 20.04.2015

13. F. Carra (CERN EN/MME)