Measurements on SPS sample in C-magnet

1
Progress on coatings, SPS samples and e-cloud
measurements
Measurements on SPS sample in C-magnet SPS MD
run 12.8 Coating system prototype for SPS
magnets
TS-MME, AT-VAC, AB/OP-RF-BI-ABP
2
Chamber for sample insertion in SPS C-magnet
J.Axensalva
Sample location
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Sample SPS-SEY, 316 LN, after scrubbing run 8/7
and first MD
edge, holder
-Conditioned region well visible in the central
part, with yield down to 1.54 (dose 0.01-0.02
Clb/cm) -Clean non-conditioned stainless steel
has SEY 2.4-2.5 -During transfer p1x10-4 mbar
for 1h (pumped down to 5x10-5mbar for transfer)
4
XPS on the same sample
Carbon concentration
-More C on conditioned zone -Different C1s
binding energy (C is more graphitic?....)
285eV
285.4eV
285.6eV
285.6eV
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Results 2nd MD run (12.8)
Magnets on
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Results 2nd MD run (12.8)
d1.25 after 15d in air but second measurement
on same sample
magnet on
Effect of bad vacuum?
7
Design of cathode system for coating test in an
SPS magnet (building 181)