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Alessandro Bertarelli – EN-MME

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1 Alessandro Bertarelli – EN-MME
HRMT-23 – Collimator Jaws: Safety Aspects HiRadMat Technical Board Meeting A. Bertarelli – CERN EN/MME A. Bertarelli – CERN EN/MME on behalf of E. Berthomé, F. Carra, A. Dallocchio, M. Garlaschè, L. Gentini, P. Gradassi, M. Guinchard, E. Quaranta, S. Redaelli, A. Rossi, O. Sacristan, G. Valentino Alessandro Bertarelli – EN-MME

2 Alessandro Bertarelli – EN-MME
Outline HRMT23 experiment overview Operation phases & pulse list proposal Safety aspects Radiation protection measures Summary Alessandro Bertarelli – EN-MME

3 Alessandro Bertarelli – EN-MME
Outline HRMT23 experiment overview Operation phases & pulse list proposal Safety aspects Radiation protection measures Summary Alessandro Bertarelli – EN-MME

4 HRMT-23 Experiment Goals
Integrally test under LIU-SPS beam (up to 288 b, ideally 2.3e11 p/b) jaws for HL-LHC collimators (simulation of ultimate HL-LHC Injection Error) Determine damage thresholds for HL-LHC Jaws (if lower than ultimate HL-LHC Injection Error) Acquire online data about response of complete jaws to beam impact Assess impact consequences on jaws components after irradiation HRMT-23: Test of Fully Assembled Jaws Main Features: Three superposed jaws in one tank. Jaws equipped with set of strain gauges, sensors, … for online acquisition. Special tank equipped with viewports for optical acquisition, LDV, electric connections etc. and fast dismounting system for glove box post-irradiation observations. Alessandro Bertarelli – EN-MME

5 Preliminary Beam Specification
Beam parameters shall be consistent with LIU/HL-LHC injection scheme (ideally reaching up to expected HL-LHC intensity and emittance). Preliminary beam parameters: Beam energy: 440 GeV Bunch spacing: 25 ns Bunches per pulse: 1 to 288 Protons/bunch: (desirably) up to 2.3 e11 p/b Beam size: 1x1 mm2 down to ~0.5x0.5 mm2 at maximum intensity (beam size should match expected HL-LHC emittance, however it may be reduced to 0.3x0.3 mm2 to compensate for possible lack of beam intensity…) Impact parameter: 1 to 5 mm Total expected number or protons ~ 3e14 p Alessandro Bertarelli – EN-MME

6 Alessandro Bertarelli – EN-MME
HRMT-23 Overall Design 3 separate complete jaws extensively instrumented. Stainless steel vacuum vessel (p > 10-3 mbar). Quick dismounting system to access and manipulate jaws in a glove box. Be/CFC vacuum windows: design to withstand higher energy density and intensity Horizontal actuation inspired by collimator movable tables; Stroke (H): 28 mm Vertical movement of the whole tank; stroke (V) +/-142 mm. 3 separate beam windows sets for each jaw Control system derived from HRMT-14 Standard HiRadMat support table: Total envelope: 1.2(H) x 0.4(W)x 2.1(L) m3 Total mass ~ 1600 kg Alessandro Bertarelli – EN-MME

7 Alessandro Bertarelli – EN-MME
HRMT-23 Containment Vacuum environment: no risk of external contamination 304L vacuum tank verified against static and buckling failure scenarios (G. Maitrejean, EDMS ) Be/CFC vacuum windows: designed to withstand higher energy density and intensity (G. Maitrejean, EDMS ) View ports equipped with special radiation-hard glasses (RS323G19 grade from Schott): robustness and good transparency also in case of high doses Vacuum seals: same concept and materials (EPDM/viton) successfully adopted for HRMT14 Special movable system with protection glasses to stop ejecta possibly produced at high intensity impacts, protectthe container and allow external observations Alessandro Bertarelli – EN-MME

8 Alessandro Bertarelli – EN-MME
HRMT-23 Jaws To Be Tested Currently envisaged proposal for Jaws: HL-LHC Secondary Collimator Jaw (TCSPM) with 10 Molybdenum Carbide – Graphite inserts (some inserts possibly coated). HL-LHC Secondary Collimator Jaw (TCSPM) with 10 Copper – Diamond inserts. TCSP jaw: to verify the resistance of Phase I C/C jaw to beam injection accident with HL-LHC parameters (double intensity, smaller emittance w.r.t Phase I) … Alessandro Bertarelli – EN-MME

9 Alessandro Bertarelli – EN-MME
HRMT-23 Jaws Assembly Each jaw can be (mounted and) dismounted independently to ease post-irradiation manipulation A small independent water expansion tank will be installed on 2 TCSPM jaws to allow measuring pressure burst in cooling circuits  Simulations to be performed to assess energy deposition and pressure burst in water! TCSP jaw recovered from spare (outgassing) TCSP collimator Alessandro Bertarelli – EN-MME

10 HRMT-23 Thermal Simulations
TCSx with MoGR Tmax<Tmelt,MoGR > 2000° Temp (C) Temp (C) TCSx with CuCD Molten region! Tmax>>Tmelt,CuCD FLUKA energy deposition maps courtesy of S. Lefteris Alessandro Bertarelli – EN-MME

11 HRMT-23 DAQ and Electronics
Instrumentation (MME Mechanical Lab). Main objectives: Acquire online pressure waves on most relevant components (mostly jaw inserts). Acquire online temperatures on relevant locations. Detect online high speed vibrations (pressure wave – induced ) Detect online low speed oscillations (full jaw flexural modes) Detect offline (possible) permanent jaw deformation Visually Record (possible) jaw explosion / fragmentation Detect offline (possible) internal material damage (e.g. delamination, cracks, tunneling …) Record online pressure burst in water cooling pipes Motorization: controls and hardware compatible with HRMT-14. Updated software interface required. Help by EN/STI/ECE … Acquisition System: the DAQ hardware and infrastructure should be designed and implemented with a comprehensive view on a larger spectrum of HiRadMat Experiments  Synergy with and contribution from other experiments and projects. Alessandro Bertarelli – EN-MME

12 HRMT-23 Instrumentation
Sensor positioning (adjustable) Strain gauge Temperature probe Laser Doppler Displacement Sensor Alessandro Bertarelli – EN-MME

13 HRMT-23 Advanced Instrumentation
Ultrasonic non destructive tests. Under study, not yet confirmed. Ultrasonic mapping along Z axis Cracks and phase changes in the jaws Not online… checking between impacts Probe compatible with 1000kGy and 350°C Alessandro Bertarelli – EN-MME

14 HRMT-23 Advanced instrumentation
Distributed strain measurements by FOS. To be studied. Beam perturbation should be limited No impact on the channel numbers for the DAQ Fast DAQ (2MHz) Alessandro Bertarelli – EN-MME

15 Alessandro Bertarelli – EN-MME
Outline HRMT23 experiment overview Operation phases & pulse list proposal Safety aspects Radiation protection measures Summary Alessandro Bertarelli – EN-MME

16 Alessandro Bertarelli – EN-MME
Operation Phases Test runs: Late Spring 2015 Expected experiment duration: 1 full week At least two persons from the experiment team to stay in the CR during all phases of the experiment set-up and test runs HRMT23 team can access DAQ control system from any CERN standard computer via LAN connection (Virtual Machine). No access request is expected during tests, except in case of issues and in any case in line with safety rules. Webcams will be placed underground to identify possible issues and evaluate solutions before requesting a direct access. After the experiment: equipment to be placed in the facility storage area for the time required to decrease to an acceptable activation level. Attention to be paid in not damaging vacuum bellows during handling! Alessandro Bertarelli – EN-MME

17 Pulse List (Tentative)
No Intensity Beam spot [mm] Bunch spacing [ns] Pulse length [us] # bunches p/bunch Total Sigma_x Sigma_y 1-50 1 5.00E+10 0.61 25 0.025 51 1.50E+11 52 2 3.00E+11 0.05 53 4 6.00E+11 0.1 54 8 1.20E+12 0.2 55 12 1.80E+12 0.3 56 24 3.60E+12 0.6 57 58 59 16 2.40E+12 0.4 60 32 4.80E+12 0.8 61 72 1.08E+13 1.8 62 144 2.16E+13 3.6 63 64 65 66 67 36 5.40E+12 0.9 68-117 118 288 2.20E+11 6.34E+13 7.2 119 120 3.17E+13 121  Alignment, pilot bunches Damage threshold for TCSP buttons/taperings Safe (?) Limit for TCSPM MoGr jaw Damage threshold for TCSPM CuCD jaw  Alignment, pilot bunches HL-LHC beam injection error “wish” case Total intensity ~ 3E14 protons Alessandro Bertarelli – EN-MME

18 Alessandro Bertarelli – EN-MME
Pulse List: Remarks Bunch number and bunch intensity are indicative and may be adjusted as a function of the operation needs: what matters is the pulse intensity HL-LHC injection error scenario can be highly destructive for CuCD: this is why an intermediate impact with half of the intensity has been added to the table In case 6.4E13 intensity is not achievable, the maximum intensity available will be requested, decreasing the beam size down to a value acceptable for the Be window Possible alternative option discussed at Joint HL-LHC WP2-WP5 and ColUSM#46 meeting: 288b, 1.6/1.7E11 p/b if scrubbing is successful; also small emittance could be obtained with BCMS beams Alessandro Bertarelli – EN-MME

19 Alessandro Bertarelli – EN-MME
Outline HRMT23 experiment overview Operation phases & pulse list proposal Safety aspects Radiation protection measures Summary Alessandro Bertarelli – EN-MME

20 Alessandro Bertarelli – EN-MME
Safety Aspects No particular issues for safety are expected No toxic, no flammable materials Summary of materials, hazard inventory and risk analysis tables prepared Material Density (g/cm3) N. of Blocs Bloc Size (mm3) Total Weight (g) MoGr 2.48 10 100x45x25 2810 CuCD 5.4 6080 AC150-K 1.67 1 1054x80x25 3520 Active jaw materials: size, weight, chemical composition Material Name Element Density (g/cm3) Weight Fraction (%) MoGr C 2.27 88.79 Mo 10.28 11.21 CuCD Cu 8.93 62.06 B 2.34 0.41 CD 3.51 37.53 AC150-K 73.6 Alessandro Bertarelli – EN-MME

21 Alessandro Bertarelli – EN-MME
Safety Aspects Material Components Estimated Mass [kg] Aluminium AW-6082 Actuation 800Kg Stainless steel Vacuum tank, beam line flanges and bellows 600Kg Copper-Beryllium RF contacts, mirror clamps 2Kg Brass LVDT axis 0.3Kg Glidcop Al-15 Collimator jaw housing and stiffener 100Kg Rad-hard glass Optical windows 10Kg Beryllium Vacuum windows 0.05Kg Copper-Nickel CuNi90-10 Collimator cooling pipes 10kg Zerodur® glass- ceramic Mirrors Cables Conductor : Bare copper Insulation : PE Pair screening: Al/ PETP/Al foil Overall screening : 0,15 mm tinned copper braid, 12 Strain gauges Polyimide support Constantan foil negligible Glue Epoxy resin PCB Cards for the switch Fiberglass, copper, and resin 2 Other materials adopted for the experimental apparatus Alessandro Bertarelli – EN-MME

22 Hazard Inventory Pressure: Shockwave max. pressure ~ 10 GPa
Vacuum: 10-3 mbar Temperature: ΔT on the most loaded jaw~ 7000K Electricity (to be confirmed): 24 V 4 Capacitors: 400 V; 3300 μF Ionizing radiations: Particle type: protons Pulse intensity: up to 288 bunches, 2.5E11 p/b Beam energy: 440 GeV Motor: Lateral speed: 240 mm/min Vertical speed: 120 mm/min Thermal properties of materials to be tested Material Specific Heat [J/kg/K] Thermal Conductivity [W/m/K] MoGr ~700 770* CuCD 420 490 AC150-K 710 200* 304L 500 16 Aluminium 900 170 Rad-hard glass 580 0.75 Zerodur® ~800 ~1 Beryllium 1825 200 Copper 385 390 Copper-Beryllium 115 Copper-Nickel 380 40 Alessandro Bertarelli – EN-MME

23 Alessandro Bertarelli – EN-MME
Risk Analysis Everyone involved in setting up the experiment will complete the required CERN safety courses (EDMS n ) Alessandro Bertarelli – EN-MME

24 Alessandro Bertarelli – EN-MME
Outline HRMT23 experiment overview Operation phases & pulse list proposal Safety aspects Radiation protection measures Summary Alessandro Bertarelli – EN-MME

25 Alessandro Bertarelli – EN-MME
HRTM-23 RP measures All experiment phases are controlled remotely, no access request is expected during tests Some of the materials to be irradiated have already been tested in HiRadMat during HRMT09 and HRMT14 experiments A radiological assessment document for HRMT14 has been prepared (https://edms.cern.ch/document/ /1). After irradiation, the time taken by the dismounting operations will be minimized, thanks to the special rapid dismounting system designed Alessandro Bertarelli – EN-MME

26 HRMT-23 Post Irradiation Plan
Two possible options currently being investigated: Acquisition (jointly with other partners, e.g. ISOLDE?), of a Glove Box allowing post irradiation analyses of several experiments (HRMT9, HRMT14, HRMT23 and MultiMat) Exploiting existing facilities in building 109 equipped to work on contaminated materials (currently checking with RP if possible). A. Bertarelli – EN-MME

27 HRTM-23 Post-irradiation Plan
After irradiation, additional analyses are foreseen. These include: Remote observation of impacted jaws through cameras, LDV and ad-hoc viewports (on upstream and downstream sides of vacuum vessel) Direct observation and in-situ measurements of impacted jaws after dismounting of the tank After appropriate cool-down time, dismounting of collimator components (jaws and jaw part) in a convenient Glove Box. Cutting of material specimens in a Glove Box Metrology, NDT and analysis of cut samples Waiting for feedbacks from German supplier Alessandro Bertarelli – EN-MME

28 Post-irradiation Manipulation
Three collimator jaws in a vacuum tank Each jaw to be tested under intense proton beam as of Spring 2015. Vacuum tank Collimator Jaws Beam Alessandro Bertarelli – EN-MME

29 Post-irradiation Manipulation
All manipulations to be performed in the Glove Box. Phase 1: Remove vacuum vessel cover (Glove Box Station 1). ~2100 Whole Mass: ~1400 kg ~1800 1 Remove 22 clamps and lift cover of the vacuum tank.

30 Post-irradiation Manipulation
Phase 2: Remove jaw assembly (Glove Box Station 1). ~2100 Jaw bolts Jaw Assembly Mass: ~ 140 kg ~1900 ~1200 2 Unscrew the jaw bolts 3 Remove the jaw assembly Alessandro Bertarelli – EN-MME

31 Post-irradiation Manipulation
Phase 3: Remove each independent jaw (Glove Box Station 2). ~1300 Jaw Mass: ~ 40 kg Jaw bolts ~500 2 Position jaw assembly in Station 2 3 Unscrew jaw bolts and dismount the tree jaws Alessandro Bertarelli – EN-MME

32 Post-irradiation Manipulation
Phase 4: Remove jaw components as required (Glove Box Station 2). Phase 5 (and following): Cut, clean, condition, extract samples as required (Glove Box Station 3) Alessandro Bertarelli – EN-MME

33 Glove Box Estimated Dimensions
Overall maximum dimensions of components to be disassembled in Station 1 are 2200x1900x1200 mm. Overall maximum dimensions of components to be disassembled in Station 2 are 1300x500x500 mm. Typical dimensions of components to be manipulated in Station 3 are 200x100x100 mm. External dimensions of experiments not presented here are expected to fall within given envelopes. Alessandro Bertarelli – EN-MME

34 Thank you for your attention!
Questions? Alessandro Bertarelli – EN-MME


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