EuCARD2 website

Welcome to EuCard2 WP11 page

Collimation Materials for fast High Density Energy Deposition (ColMat-HDED)

Latest events:

3rd EuCARD-2 ColMat-HDED (WP11) annual meeting
  University of Valletta (Malta) Valletta, Malta, 28th - 29th April 2016
3rd EuCARD-2 annual meeting
  University of Valletta (Malta) Valletta, Malta, 26th - 28th April 2016

Past events:

2nd EuCARD-2 annual meeting
  ALBA synchrotron, Barcelona (Spain), 21st - 24th April 2015
2nd EuCARD-2 ColMat-HDED (WP11) annual meeting
 GSI, Darmstadt (Germany), 4th - 5th December 2014 minutes
1st EuCARD-2 annual meeting
  DESY, Hamburg (Germany), 19th - 23th May 2014
WP11 kick-off meeting
 CERN, Geneva (Switzerland), 9th - 10th December 2013 minutes picture


Introduction to WP11

Beam collimation and machine protection are central R&D areas in the accelerator beam community. Accelerators cannot be run at high intensity, energy and brightness without appropriate materials for collimators and beam dumps.

Accelerator performance with ever increasing beam brightness and stored energies as for the CERN projects of LIU and HL-LHC, and other projects such as FAIR or future neutrino facilities, pushes material requirements for collimators into more challenging grounds and unknown territories, given the expected very fast high density energy deposition (over a few nanoseconds). For example, peak energy densities of 15 GJ/mm2 are now imaginable in the LHC beam, so even a small fraction of it would cause discontinuous change in the medium pressure, temperature and density. Such changes must be measured to provide parameters for modelling shockwave and damage propagation and validate the use of materials in accelerator applications. Furthermore irradiation induced damage may deteriorate material properties and performance and must therefore be determined in an early design phase in order to estimate the component lifetime and robustness to beam impact, be it protons or ions.

Present materials are operated at their physical limits and operation of the LHC already has to be adapted to the maximum beam load the presently installed materials allow. Building upon the results of EuCARD and pushing them into a new and even more innovative regime, the collimation WP in EuCARD2 will support progress with material developments for collimators and targets. The new availability of irradiation facility such as HiRadMat (in 2012 at CERN) and M-brunch (2011 in GSI), together with well-established irradiation facilities (NRC-Kurchatov Institute), will allow to fully characterising promising candidate materials like metal-diamond composites and new types of silicon carbide.

Beyond the relevance for high-energy physics, the development and characterisation of new materials will be of interest for other applications where equipment may be exposed to high intensity radiation, high-density energy deposition and large temperature excursion such as thermal management for electronics, high temperature space applications, and fusion and fission reactors.


Task 11.1: Coordination and Communication

  • Define the global system taking inputs from different work-package (WP) tasks
  • Coordinate and schedule WP tasks, to monitor work progress and inform the project management and WP participants
  • Follow up the WP budget and use of resources
  • Prepare internal and deliverable reports

Task 11.2: Material testing for fast energy density deposition and high irradiation doses

  • Review novel composite materials for usage in accelerators.
  • Perform experimental tests on material robustness after highly energetic beam impact or under high temperature stresses and measure properties.
  • Perform irradiation and characterisation of property changes of collimator materials.

Task 11.3: Material mechanical modelling

  • Model and theoretically characterize new materials and composites for collimation, and provide parameters for stress analysis.
  • Model energy deposition and shock-induced damage following abnormal beam loss events.
  • Compare results with experimental data.

Task 11.4: Material specification

  • Simulate the potential of new collimator materials like silicon carbide and metal-diamond compounds for collimation of hadron beams and iterate on material specifications to address the needs of future accelerator developments.

WP11 Partners




External partners

Description of work

Task 11.1: Coordination and Communication

The activities of this task are for the work package coordinators [A. Rossi, J. Stadlmann] to oversee and co-ordinate the work of all other work package tasks, to ensure the consistency of the work according to the project plan and to coordinate the WP technical and scientific tasks with tasks carried out by the other work packages when relevant. The coordination duties also include the organization of WP internal steering meetings, the setting up of proper reviewing, and the reporting to the project management and the distribution of the information within the WP as well as to the other work packages running in parallel.
The task also covers the organization of and support to the annual meetings dedicated to the WP activity review and possible activity workshops or specialized working sessions, implying the attendance of invited participants from inside and outside the consortium.

Task 11.2: Material testing for fast energy density deposition and high irradiation doses

The collimator robustness and integrity after impact is of great importance in a collimation system.
Aim of this task is to review the best modern materials and to perform experimental tests on material robustness and mechanical behaviour. For this purpose highly energetic beam impact and high thermal stresses are induced and the resulting heating and shock waves are observed with multiple diagnostics. One novel diagnostic for detecting beam impact on collimators during operation is the usage of modern microphones (measurement of acoustical shock waves).
This work requires building of test samples, of material samples, define new experimental setups, laboratory tests, tests under beam irradiation.

The following institutes contribute to this work: CERN, GSI, POLITO, RHP, RRC KI, KUG.

Task 11.3: Material mechanical modelling

The materials used for collimators must have high absorbing power and high robustness in order to guarantee effective collimation of high intensity energetic proton and ion beams, and survive accidental losses that may lead to high power deposition onto the jaws.
Aim of this task is the theoretical modelling of new materials and composites, the calculation of energy deposition following accidents and the modelling of shock-induced damage.

The following institutes contribute to this work: CERN, GSI, POLITO, RHP, RRC KI, UM.

Task 11.4: Material specification

The increasing beam intensity in accelerators requires ever better cleaning efficiency, and lower collimator impedance.
Aim of this task is to evaluate the potential, advantages and disadvantages of materials that are studied in 11.2 and 11.3 with beam simulation codes. The results are used to iterate on material specifications. The benefit of new collimator material is compared with alternative advanced collimation concepts.

The following institutes contribute to this work: CERN, CSIC, RHUL, HUD, UNIMAN

WP11 activities

A complete list of deliverables and milestones of all EuCARD2 working packages can be found the official EuCARD2 webpage.

Deliverables of WP11

Deliverable 11.1: Result on simulations of new materials and composites (due by M36)
Deliverable 11.2: Report on comparative assessment of beam simulation codes (due by M40)
Deliverable 11.3: Irradiation test results (due by M46)
Deliverable 11.4: Results on characterisation of new materials and composites (due by M46)

Milestones of WP11

MS69: Irradiate first sample (due by M12)

M. Tomut, A. Rossi, A. Bertarelli, F. Carra, E. Quaranta - Milestone Report 2014

MS70: Present results on material damage from irradiation (due by M24)

MS71: Show new material development status (due by M24)

MS72: Present results on material damage from simulation and compare to experiments (due by M45)