Cleanroom Upgrade in SM18 Optical Inspection bench

Cleanroom Upgrade in SM18Optical Inspection bench SPL internal meeting 6, 7 December J. Chambrillon CERN-BE-RF

CR upgrade in SM18 & OI bench • High pressure rinsing • Cleanroom layout: • Existing facility • Actual • Updated • Ultra Pure Water production • Optical inspection: • SPL01 Cu • SPL01 Nb • What’s next • Conclusion J. Chambrillon CERN-BE-RF

High Pressure Rinsing (HPR) • HPR from SPEC (US). • HP pump (140 bar, 1.1 m3/h) @ 3 stages to prevent vibration. • Rinsing cabinet with top wand design (needed in SM18). • Cabinet should have a pass trough design => load/unload from different class cleanrooms. • Drying of the cavity by blowing hot N2. • Rinsing nozzle to be designed. J. Chambrillon CERN-BE-RF

Cleanroom layout (Existing facility in SM18) Cleanroom facility RF facilities Cryogenic Magnet SM18, plan J. Chambrillon CERN-BE-RF

Cleanroom layout (Actual) ISO 7 ISO 4 Air Box • Built in 1991. • Goals : • Increase cleanliness. • Create a rinsing room. • Get ride of the Air Box to gain space. J. Chambrillon CERN-BE-RF

Cleanroom layout (Updated) • Update should be done by Daldrop, initial builder of the facility. • Extension of the rinsing room. • Creation of a preparing room outside of the facility. ISO 5 ISO 4 ISO 5 ISO 4 Optical Inspection J. Chambrillon CERN-BE-RF

Cleanroom layout (Updated) Refurbishment of the filtering system with Fan Filter Unit (FFU). Rinsing room extended to 4.5m high to held the HPR. Preparing room based on softwall design. J. Chambrillon CERN-BE-RF

Cleanroom layout (Updated) Rinsing room close up. Sequence foreseen: • Cavity preparation for rinsing in ISO 5. • Rinsing of the outside. • Rinsing of the inside. • Pre-drying with Hot N2. • Final drying in ISO 4. • Assembly for RF test. ISO 5 ISO 4 ISO 5 J. Chambrillon CERN-BE-RF

Ultra Pure Water production • Pre-design of the installation, done by Veolia France • Production capacity of 1 m3/h. • UV lamp (185 nm) to prevent bacteria growing and • decrease Total Organic Carbone (TOC): • CXHYOZ -> CO2 + H20 -> H2CO3 -> H+ + HCO3- • HCO3- absorbed by • polishing resin. • Need to cool down • the recirculation • water due to the • temperature in • SM18. J. Chambrillon CERN-BE-RF

Optical Inspection (Kyoto/KEK) Camera: 3488 x 2616 pix @ 2.5 ips 26.1 Mo/picture Cavity can: • Slide • Rotate Camera can: • Rotate over 180° J. Chambrillon CERN-BE-RF

Optical Inspection • Optical head in detail J. Chambrillon CERN-BE-RF

Optical Inspection (SPL01 Cu) • Use to perform the functional test of the bench and get experience. • First picture of an equator welding. • Easier illumination on copper. J. Chambrillon CERN-BE-RF

Optical Inspection (SPL01 Nb) • Resolution 2 µm/pix. • Image size = 6.9 mm X 5.2 mm. • Scratch or crack observed inside the cut off. • Inspection done by A. Benoit. J. Chambrillon CERN-BE-RF

Optical Inspection (SPL01 Nb) Crack on SPL01 Nb cut off. Nb structure close up SPL01. J. Chambrillon CERN-BE-RF

Optical Inspection, what’s next? • Get a code to automate the inspection: • Autofocus • Step motion • Auto illumination • Get a code to automate the analysis: • Colour correction • Image assembly • Contour detection to find defects J. Chambrillon CERN-BE-RF

Conclusion • Contracts should be signed for: • Cleanroom • High Pressure Rinsing • Ultra Pure Water by the end of the year 2012. • Build a rinsing nozzle. • Develop a code to automate the optical bench and gain experience with SPL01 Nb. • Optical Inspection is waiting for a quench. J. Chambrillon CERN-BE-RF

Acknowledgment: K. Schirm N. Valverde F. Pillon M. Therasse A. Benoit L. Abel Thank you for your attention J. Chambrillon CERN-BE-RF

Cleanroom Upgrade in SM18 Optical Inspection bench