1. New SPS liners: the 2009 spring collection
M.Taborelli
for the SPSU team
24/3/2009

2. Liners in SPS: what and where XSD1 signal SEMCLOUD1 (1..48) StSt liner
XSD2 signal SEMCLOUD2 (49..96) a-C coating CNe13 liner (inserted 11/8 in SPS, vented weeks before insertion, measured already twice and vented from beginning December to now)
SDneg signal SEMCLOUD1 (49..96) a-C stripe of 4 cm width
EcEx signal SEMCLOUD2 (1..48) (cable of previous quad)
a-C/Zr CNe/Zr#10
XSD1
XSD2
EcEx
SDneg

3. Liner a-C/Zr CNe/Zr#10 C Zr
1 μm
200 nm
-No major differences between the two ends of the liner (parameters were chosen for that).
-Unfortunately the roughness is less than in the previous trials made on small pieces in tubes instead of large liners. It is probably due to the higher temperature reached in the liner (more diffusivity=less roughness)

4. CNe/Zr#10
CNe9/Zr#3
CNe14

5. Liner a-C/Zr: SEY
SEY max=0.96
The differences reflect the observed roughness (and may be more than that….the CNe9 was in itself one of the best coatings we had)

6. Previous experiment (2008) in C-magnet with StSt reference sample
50 mm
40 mm

7. Liner with a 40 mm wide stripe of a-C coating

8. Still to be inserted in C-magnet: SPS-SEY movable sample
a-C CNe14, aging 2 months in air wrapped in aluminium foil + 5 months in the “high vacuum” system (10-3 mbar) kept in static vacuum
2 months air, wrapped
in alu foil
+5 months in HV