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 (
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