1. on behalf of the Phase II Collimation Design team
Phase II Collimators at CERN: Project Status and Progress in WP 8.2 and 8.3
Col/Mat WP8 Meeting
13th September 2010
N. Mariani
on behalf of the Phase II Collimation Design team

2. Outline Where we are: BPM Prototype installed on SPS
1st Phase II Prototype (P1) with Glidcop Jaws ready for brazing
New Materials R&D: Metal-Diamond and SiC
Development of new materials
Characterization of thermal, mechanical and physical properties
Radiation Hardness
Beam Shock Resistance (HiRadMat)
Conclusions 2 2

3. BPM Collimator Prototype
First Tests with SPS Beam show a good behavior of integrated BPMs allowing a dramatic improvement in set-up time.
Data courtesy: D. Wollmann (BE/ABP) 3 3

4. OFE-Copper Cooling Circuit Molybdenum Back-stiffener
1st Phase II Prototype (P1)
OFE-Copper Cooling Circuit
GlidCop Jaw
SS Jaw Stiffener
Molybdenum Back-stiffener

5. Metal-Diamond Composites
Copper-Diamond (CuCD):
Developed at AIT (Austrian Institute of Technology)
E. Neubauer and M. Kitzmantel
Molybdenum-Diamond (MoCD):
Developed at BrevettiBizz (Verona - Italy)
S. Bizzaro
MoCD Samples produced at BrevettiBizz (First Attempt):
30% Diamond, 60% Mo, 10% Cu
CuCD Plate produced at AIT:
60% Diamond, 39% Cu, 1% B 5 5

6. Expected value of Composite
CuCD Characterization
Thermo Physical properties measured at AIT and CERN (ρ, CTE, Cp estimated by ROM, K), and at CERN (ϭ)
Density (g/cm3)
Cp (J/KgK)
K (W/mK)
CTE (10-6 K-1) Ϭ
%IACS (MS/m)
Expected value of Composite
5.61
442
615 (by H&J Model)
6.25 (by Turner Model)
23.7% (13.7) (by LW formula)
Measured
5.33
~ 420*
~ 490 ±40
6-8
21.7% (12.6)
% of Th. Value
95.02%
95%
~ 80 % -
~ 91.5 %
SEM Fracture Surface Analysis shows poor adhesion between Diamond and Cu
Good Results... But still work to do:
AIT : Thermal properties from RT to 1000°C; Mechanical properties
2) Politecnico di Torino: Mechanical properties from RT to 1000°C.
3) EPFL: CTE from 20°C to ~900°C
4) Kurchatov Institute and GSI: Radiation Damage

7. Good preliminary results, work still to do...
MoCD Type A Characterization
Good Adhesion and matrix strength (some diamond particles broke during fracture) but...
Bad compaction rate of matrix results in poor thermo physical properties
Density (g/cm3)
K (W/mK) s
%IACS (MS/m)
Flexural Strength (MPa)
Expected value
8.07
573* (by ROM Model)
23.2% (13.5) (by LW Formula) -
Measured
~ 110
% (2-3)
140 ± 20
% of Th. Value
84-93%
~ 19.2 %
~ 15-22%
Good preliminary results, work still to do...

8. CVD SiC Characterization
Microcertec CVD SiC (STD Res Ωm)
CTE at EPFL (L.Weber)
Thermal Properties at AIT (W.Hohenauer)
Cp from 700 J/KgK RT to 1150 J/KgK at 1000°C
Next Steps:
- Impedance by Stripline Method (H.Day,CERN BE/ABP)
- Radiation Hardness at KI

9. Radiation Hardness No news yet from GSI on CuCD and Beam Parameter
Foreseen Work from Working Plan of EuCard activities:
GSI:
Characterization before and after irradiation (radiation damage, nanoindentation of matrix, in-situ SEM analysis)
Material: CuCD (MoCD?)
Kurchatov Institute:
Measures of Mechanical, Physical and Thermal Properties before and after irradiation on KI beam.
Materials: CuCD, SiC (MoCD?)
CERN (FLUKA Team):
Perform FLUKA simulations reproducing tests conditions both at GSI and KI to compare results:
need to scale DPA results from MeV to TeV in order to estimate LHC irradiation level and materials effective degradation.
No news yet from GSI on CuCD and Beam Parameter

10. FEM simulations to scale HiRadMat results from SPS to LHC conditions
HiRadMat Facility
High Radiation to Materials Project: development of a new facility (located in the TCC6-TNC Area) to validate the LHC components in the Accident Scenario
Intense Pulsed Beam from SPS (450 GeV) to investigate High Energy Beam shock resistance.
Foreseen Timetable
2011: Materials Testing
Expected tests of alternative materials (Glidcop, CuCD, CuCD+SiC, Mo, MoCD, MoCD+SiC) and P1.
2012: Beam Impact Final Test
on a complete Phase II Collimator for the final Project Validation
The experimental results will be used to validate the Thermo Mechanical Modeling carried out in collaboration with Politecnico di Torino (see PoliTo Talk)
FEM simulations to scale HiRadMat results from SPS to LHC conditions

11. Materials R&D Summary CVD SiC: CuCD: MoCD:
Thermal Characterization completed.
Electrical Characterization on the way (Impedance measures).
Still waiting for Radiation Hardness Characterization.
CuCD:
Material Development Work nearly completed.
Very Interesting Results (especially on Thermal Properties).
Waiting for Mechanical and Radiation Hardness Characterization
MoCD:
Interesting results but still work to do on realization process.
Very good collaboration with both AIT and BrevettiBizz 11 11 11

12. Conclusions BPM functional prototype built, installed.
First tests at SPS show promising results.
New full 1st Phase II Collimator Prototype manufactured and ready for brazing. Testing will start end 2010.
New materials R&D in full swing.
URGENT NEEDS:
Radiation Hardness Characterization must start as soon as possible on CuCD and SiC at KI and GSI. 12 12 12

13. THANKS FOR YOUR ATTENTION
Phase II Collimators at CERN: Project Status and Progress in WP 8.2 and 8.3
Col/Mat WP8 Meeting
13th September 2010
THANKS FOR YOUR ATTENTION