1. Proposal 1703 - TDIS-TZM WP14 TDIS jaw validation testing
HiRadMat 2018
David Carbajo Perez (STI-TCD), Mark Butcher (STI-ECE), Marco Calviani (STI-TCD),
Matthias Immanuel Frankl (STI-FDA), Luca Gentini (MME-EDS), Inigo Lamas (STI-TCD),
Anton Lechner (STI-FDA), Antonio Perillo-Marcone (STI-TCD), Regis Seidenbinder (STI-TCD)

2. WP14 TDIS jaw validation testing HiRadMat 2018
Background - Motivation Object of study Testing aim Experiment details Instrumentation to be installed Post Irradiation Examination Conclusions
2017/09/15
David Carbajo Perez (STI-TCD)

3. WP14 TDIS jaw validation testing HiRadMat 2018
Background – Motivation
The upgrade of the LHC aiming at a 10 times higher integrated luminosity brings new challenges also for the whole injection system.
2017/09/15
David Carbajo Perez (STI-TCD)

4. WP14 TDIS jaw validation testing HiRadMat 2018
Background – Motivation
The upgrade of the LHC aiming at a 10 times higher integrated luminosity brings new challenges also for the whole injection system.
As part of the injection protection equipment, the current TDI must be upgraded to a higher energy absorption capacity.
2017/09/15
David Carbajo Perez (STI-TCD)

5. WP14 TDIS jaw validation testing HiRadMat 2018
Background – Motivation
The upgrade of the LHC aiming at a 10 times higher integrated luminosity brings new challenges also for the whole injection system.
As part of the injection protection equipment, the current TDI must be upgraded to a higher energy absorption capacity.
FEA simulations reveal high thermomechanical loads on certain components of the jaw in case of beam impact  empirical validation of the design needed!
2017/09/15
David Carbajo Perez (STI-TCD)

6. WP14 TDIS jaw validation testing HiRadMat 2018
Background – Present TDI
Active length 4.2 m (including tapering)
Jaw SS support beam
Ion pump
Injected beam
2.8 m Graphite R7550
(6 blocks)
0.6 m Al. 5083
0.7 m CuCr1Zr
Total length 6.5 m (including transitions)
TDI longitudinal cross-section view
2017/09/15
David Carbajo Perez (STI-TCD)

7. WP14 TDIS jaw validation testing HiRadMat 2018
Background – TDIS
Injected beam
Low Z jaws (2 blocks of graphite R7550 per jaw)
0.9 m Ti-6Al-4V
0.7 m CuCr1Zr
Active length 4.7 m (3 x 1565 mm)
Ion pump
3 modules (3 tanks)
Segmented design with 3 modules-chambers
New collimator-like jaw concept
TDIS longitudinal cross-section view
2017/09/15
David Carbajo Perez (STI-TCD)

8. WP14 TDIS jaw validation testing HiRadMat 2018
Object of study: complete TDIS jaws with special focus on the back-stiffener
Table 1 - Main elements of TDIS jaw
Component Name
Material
Spring support plate
Stainless steel 304L EN
Compression spring
Stainless steel EN
Cooling pipes support plate
Cooling circuit
Copper Alloy CW008A
Back-stiffener
Molybdenum Alloy TZM
Clamp
Titanium Alloy Ti6Al4V
Absorbing block
Graphite R7550
TDIS Jaw cross-section view
2017/09/15
David Carbajo Perez (STI-TCD)

9. WP14 TDIS jaw validation testing HiRadMat 2018
Object of study: complete TDIS jaws with special focus on the back-stiffener
Component Name
Material
Back-stiffener
Molybdenum Alloy TZM
1565mm
Additionally a solution made out of aluminum alloy 2219 T6 will be tested. This option brings some advantages:
Less weight (4,3 kg vs 15,3 kg )
Lower cost (around 60% cheaper)
2017/09/15
David Carbajo Perez (STI-TCD)

10. WP14 TDIS jaw validation testing HiRadMat 2018
Object of study
Jaws will be installed inside one TDIS module to be mounted onto HRMT interface table.
Mechanical table
Jaw
RF screen
Vacuum vessel
Support
Ion pumps / NEG cartridges
Not required for the experiment
2017/09/15
David Carbajo Perez (STI-TCD)

11. WP14 TDIS jaw validation testing HiRadMat 2018
Object of study
Mechanical table
Jaw
RF screen
Vacuum vessel
Support
Ion pumps / NEG cartridges
Not required for the experiment
2017/09/15
David Carbajo Perez (STI-TCD)

12. WP14 TDIS jaw validation testing HiRadMat 2018
Object of study
Mechanical table
Jaw
RF screen
Vacuum vessel
Support
Ion pumps / NEG cartridges
TZM
Aluminum
alloy 2219
Not required for the experiment
2017/09/15
David Carbajo Perez (STI-TCD)

13. WP14 TDIS jaw validation testing HiRadMat 2018
Testing aim
Ultimate goal: To reproduce a state of temperature/stresses in the back-stiffener comparable to that induced by the worst-case potential impact of the HL-LHC beam:
Real failure scenario (worst-case)
HL-LHC beam
Impact parameter: 38 mm
Intensity: 2.3E11 ppb (320 bunches)
Impact parameter
2017/09/15
David Carbajo Perez (STI-TCD)

14. WP14 TDIS jaw validation testing HiRadMat 2018
Testing aim
Ultimate goal: To reproduce a state of temperature/stresses in the back-stiffener comparable to that induced by the worst-case potential impact of the HL-LHC beam:
Real failure scenario (worst-case)
HL-LHC beam
Impact parameter: 38 mm
Intensity: 2.3E11 ppb (320 bunches)
Testing scenario
HRMT beam
Impact parameter: 52 mm
Intensity: 1.2E11 ppb (288 bunches)
Impact parameter
2017/09/15
David Carbajo Perez (STI-TCD)

15. WP14 TDIS jaw validation testing HiRadMat 2018
Testing scenario
Real failure scenario (worst-case)
Testing aim
Several Fluka simulation loops were conducted to find out the right parameters to achieve in the experiment a comparable energy deposition in the stiffener than in the real case:
2017/09/15
David Carbajo Perez (STI-TCD)

16. WP14 TDIS jaw validation testing HiRadMat 2018
Testing aim
According to FEA simulations the defined test settings should lead to reasonably similar peak temperatures/stresses at the back-stiffener than in the real case:
Real Case
Max. T: 215 °C
HRMT settings
Max. T: 235 °C
Beam
Map of thermomechanical loads on this face of the back-stiffener
2017/09/15
David Carbajo Perez (STI-TCD)

17. WP14 TDIS jaw validation testing HiRadMat 2018
Testing aim
According to FEA simulations the defined test settings should lead to reasonably similar peak temperatures/stresses at the back-stiffener than in the real case:
Real Case
Max. stress: 443 MPa
( < Rp0.2 = 515 MPa)
HRMT settings
Max. stress: 461 MPa
(< Rp0.2 = 515 MPa)
Beam
Map of thermomechanical loads on this face of the back-stiffener
2017/09/15
David Carbajo Perez (STI-TCD)

18. WP14 TDIS jaw validation testing HiRadMat 2018
Experiment details
Desired timeslot for the experiment: end of summer 2018
Beam parameters
Particle type
protons
Pulse intensity (range)
3.5x1013
No. bunches
288
Intensity/bunch
1.2x1011
Spot size
sigma_x = sigma_y = 1000 um
Number of pulses
< 10 (5 per jaw) + single bunch nominal intensity shots for alignment
Experimental Setup
Measurement/observation tools
Supply needs
Cooling water (Flow: < 0.5 m3/h, Pressure: < 15 bar)
Power supply for mechanical tables
Primary vacuum
Safety and radiation protection aspects
General Safety
Tank under primary vacuum to prevent any risk of oxidation during high-intensity beam impact on the absorber blocks (graphite).
Radiological risk
Residual dose rates not expected to be very much different from the estimations done for HRMT28.
Contamination risk
No contamination expected either during radiation or during handling
No risk of contamination outside of the tank, nor inside the tank, since the graphite has been already validated at these beam parameters.
2017/09/15
David Carbajo Perez (STI-TCD)

19. WP14 TDIS jaw validation testing HiRadMat 2018
Instrumentation to be installed
Rosette strain gauges / Fiber optic strain gauges*
PT100 / Fiber optic temperature sensors*
Radiation resistant cameras for online visual inspection of the jaws
Beam loss / position monitoring
* Measurement based on the Fiber Bragg Grating principle:
2017/09/15
David Carbajo Perez (STI-TCD)

20. WP14 TDIS jaw validation testing HiRadMat 2018
Post Irradiation Examination
Two main investigations initially foreseen to be conducted on the back-stiffener and other main components of the jaw :
Metrology analysis
Ultrasounds inspection
2017/09/15
David Carbajo Perez (STI-TCD)

21. WP14 TDIS jaw validation testing HiRadMat 2018
Conclusions
TDIS key equipment of the HL-LHC injection system
Equipment core (jaws) to be validated from the thermomechanical point of view
HRMT experiment results expected to confirm the robustness of the jaw vs beam impact
Test with low radiological / contamination risk
Proposed date for the experiment: end of summer 2018
2017/09/15
David Carbajo Perez (STI-TCD)

22. WP14 TDIS jaw validation testing HiRadMat 2018
THANKS FOR YOUR ATTENTION