Context
Assembly of cavities following high pressure rinsing.
Positive pressure clean room partitioned into 3 different ISO classes: 7, 5 and 4.
Technical means
- Total surface area of the clean room: a ≈ 200 m2 (of which a = 112.5 m2 at ISO class 4 with total laminar flow).
- Length of the ISO4 room: l = 15.6 m.
- Door dimensions: 2.8 m x 2.6 m.
- Ceiling height: h = 3.4 m.
- Available fluids :
- helium and argon supply network (bottle supply, P = 200 bar filtered),
- compressed air network (P = 6 bar filtered),
- ultrapure water in the 3 compartments.
- The clean room is equipped with:
- 2 changing rooms (at ISO class 5 and 7) and 1 air shower for the entrance in ISO4,
- 5 passages through bulkheads for pumping groups,
- 2 pumping groups (connection under the ISO4 technical floor),
- assembly stations (e.g. cavity-coupler),
- 108 Final Filter Units (FFU) with final filters of U16 efficiency,
- 2 railing systems located under the technical floor (distance between the rail axes : 1860 mm, length of the rails : 90 m),
- a washer BELIMED (h 1.5 m x l 1 m x w 2 m) for the external washing of cavities before their entrance in the ISO 4 clean room.
- Additional facilities :
- Air handling unit (f = 33 500 m3/h) with cooling system (P = 179 kW),
- Pure and ultrapure water treatment plant (resistivity r ≈ 17.6 MΩ, temperature T ≈ 17.0 °C),
- Control area (control of different parameters such as the rotation speed of FFU fans....).
Achievements, related projects
- Finalization of the assembly of cryomodules in the framework of the Spiral2 project,
- Assembly of 101 cryomodules (each including a string of 8 cavities at 1.3 GHz) in the framework of the XFEL project,
- Assembly of 36 cryomodules (each including a string of 4 cavities at 700 MHz) in the framework of the ESS project.
Technical steps, expertise
- Cleaning of cavities, rinsing with ultrapure water and drying (with temperature up to T = 60°C and absolute filter),
- Assembly of cavities,
- Pumping, vacuum test,
- Assembly of elements surrounding the cavity "cryostating" (insulation, magnetic shielding...) outside the clean room.
Contact:
