1. Cleanroom Upgrade in SM18 Optical Inspection bench
SPL internal meeting
6, 7 December
07/12/2012
J. Chambrillon CERN-BE-RF

2. 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
07/12/2012
J. Chambrillon CERN-BE-RF

3. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

4. Cleanroom layout (Existing facility in SM18)
Cleanroom facility
RF facilities
Cryogenic
Magnet
SM18, plan
07/12/2012
J. Chambrillon CERN-BE-RF

5. Cleanroom layout (Actual)
ISO 7
ISO 4
Air Box
ISO
FS 209 4 10 5
100 7
10 000
Built in 1991.
Goals :
Increase cleanliness.
Create a rinsing room.
Get ride of the Air Box to gain space.
07/12/2012
J. Chambrillon CERN-BE-RF

6. Cleanroom layout (Updated)
ISO 5
ISO 4
ISO 5
ISO 4
Optical
Inspection
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.
07/12/2012
J. Chambrillon CERN-BE-RF

7. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

8. 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
07/12/2012
J. Chambrillon CERN-BE-RF

9. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

10. 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°
07/12/2012
J. Chambrillon CERN-BE-RF

11. J. Chambrillon CERN-BE-RF
Optical Inspection
Optical head in detail
07/12/2012
J. Chambrillon CERN-BE-RF

12. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

13. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

14. Optical Inspection (SPL01 Nb)
Crack on SPL01 Nb cut off.
Nb structure close up SPL01.
07/12/2012
J. Chambrillon CERN-BE-RF

15. 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
07/12/2012
J. Chambrillon CERN-BE-RF

16. 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.
07/12/2012
J. Chambrillon CERN-BE-RF

17. J. Chambrillon CERN-BE-RF
Acknowledgment: K. Schirm N. Valverde F. Pillon M. Therasse A. Benoit L. Abel Thank you for your attention
07/12/2012
J. Chambrillon CERN-BE-RF