Product Breakdown Structure for FCC-ee

This page documents the Product Breakdown Structure of the FCC-ee Collider. A Product Breakdown Structure (PBS) is a structured list of all the systems, subsystems, elements and down to the parts that are needed to construct and operate a product or a facility.

The FCC-ee PBS listed below starts from the highest level description from a functional point of view. Clearly, we physically need a Collider ring where both beams circulate and collide, but also a set of physics detectors to observe and record the collisions and characterize the physical processes that we are interested in. The Booster is another ring that is used to accelerate the beams and inject them into the collider continuously (top-up injection scheme). The beams come into the Booster from pre-injector facilities through transfer lines. The Collider and Booster, as well as the Physics detectors, are located in underground infrastructures comprising a long tunnel ring, lateral extensions and larger caverns. The underground infrastructures are filled with equipment required for the Collider, Booster and Physics detectors to operate and are also equipped with Safety systems and facilities, handling equipment, transport equipment (both vertically along the shafts and horizontally in the tunnel). On the surface, at the top of the pits, surface infrastructures take the form of buildings that host equipment required for the operation of underground facilities, including electrical substations and cooling and ventilation, cryogenics supplies, etc.

Several enabling facilities are required during the project, operation and dismantling phases of the FCC-ee. These include R&D, Test, Assembly, Storage, Operation, Maintenance and Dismantling facilities. All are needed at all stages of the lifecycle of the FCC-ee but all are needed at least in one stage.

Finally, the immaterial assets required to design, build, test, operate the FCC-ee take the form of Software and Control Systems. They also have to be developed and maintained which requires resources and planning.

The PBS for such a large facility as the FCC-ee collider can be extremely complex and large but we are trying to present it here, at the stage of the feasibility study, in a concise and clear format. We have deliberately decided to not drill down to the nuts and bolts of each and every piece of equipment but to stop at the level of "equipment" which is loosely defined as a piece of hardware with a set functionality and that is installed as such in the tunnel. For example, a 10 m long bending magnet that can be lowered and installed on the Collider as a single piece of equipment will be listed here as such. Later in the project, the Work Package that will be responsible for magnets will have to build the PBS of such magnet, but here and now we cannot afford to be so precise.

Each node in the PBS receives a unique identification number of the form "1.2.3.", where the number of digits represents the level in the tree structure, here the third level. Each node in the PBS also contains additional information on the element, for example, its weight or length, its multiplicity, i.e. how many times the same element is installed in the facility (under that node structure), the dependencies to other systems and the interfaces if already known, and in general any link to existing documentation.

The PBS lists all equipment needed at any stage of the process. For example, the PBS lists both the 400 MHz single-cell RF cavities and the 800 MHz multi-cell RF cavities even if both will never be installed at the same time on the Collider but in different stages. In other words, the PBS is the sum over time of all equipment that will be needed for the lifecycle of the FCC-ee.

The latest version of the PBS is available here: /eos/project/f/fccproject/fccis/WP2_collider/tech_docs/ProductBreakdownStructure/2022-02-08-PBS-Full_draft.xlsx

The top-level of the FCC-ee PBS is made of nine parts listed below :

Node Code Level 1 Level 2 Links Comments
1. Electron Positron Collider   Excel File  
1.1.   Magnets    
1.2.   Radio-Frequency Systems    
1.3.   Beam Instrumentation    
1.4.   Collimation    
1.5.   Vacuum    
1.6.   Injection, Extraction and Dump    
1.7.   Support, Survey and alignment    
1.8.   Machine Protection    
1.9.   Radiation Monitoring    
1.10.   Cryogeny    
2. High Energy Booster   Excel File  
2.1.   Magnets    
2.2.   Radio-Frequency Systems    
2.3.   Beam instrumentation    
2.4.   Collimation    
2.5.   Vacuum    
2.6.   Injection systems    
2.7.   Extraction systems    
2.8.   Beam feedback systems    
3. Injectors   Excel File  
3.1.   Electron Source    
3.2.   Linacs A, B, C, D    
3.3.   Positron Source    
3.4.   Damping Ring    
3.5.   Transfer Lines for DR    
3.6.   Transfer Lines to HEB    
4. Transfer Lines   Excel File  
4.1.   Collider Injection Lines    
4.2.   Collider Dump Lines    
4.3.   Booster Injection Lines    
4.4.   Booster Extraction Lines    
4.5.   Booster Dump Lines    
4.6.   Injector Extraction Lines    
5. Underground Infrastructures   Excel File  
6. Surface Infrastructures   Excel File  
6.1   Point A    
6.2   Point B    
6.3   Point D    
6.4   Point F    
6.5   Point G    
6.6   Point H    
6.7   Point J    
6.8   Point L    
6.9   CERN Meyrin    
6.10   Other...    
7. Physics Detectors   Excel File  
7.1.   Luminosity Calorimeter    
7.2.   Vertex Detector    
7.10.   Supports    
7.11.   Cabling    
7.12.   Assembly Tools    
8. Enabling Facilities   Excel File  
8.1.   R&D facilities    
8.2.   Construction Facilities    
8.3.   Manufacturing Facilities    
8.4.   Assembly Facilities    
8.5.   Test Facilities    
8.6.   Storage Facilities    
8.7.   Operation Facilities    
8.8.   Maintenance Facilities    
8.9   Dismantling Facilities    
9. Software and Control Systems   Excel File  
9.1.   Databases    
9.2.   Controls Software    
9.3.   Security    

-- GhislainROY - 2022-02-08

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Topic revision: r10 - 2022-02-08 - GhislainROY
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