13. tsr 345 MHz
ssr 325 MHz
β=0.5-0.64
β=0.22
ANL
Fermilab
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M. Kelly, Jan., 2009 R.Wagner, HB2008
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13
14. ssr 352 MHz tsr 760 MHz
β=0.35 β=0.2 FZJ
Jlab test
IPN Orsay
1.E+10
FE
M ultipacting
1.E+09
Q0
test 2 (T=2 K)
test 2 (T=4.2 K)
test 1 (T=2 K)
test 1 (T=4.2 K)
1.E+08
0 2 4 6 8 10 12 14
Eacc [MV/m]
2-( -* $%%$H ) ) After test 1 the cavity was warmed up, disassembled, degreased and heat
A) treated at 600 C for 10 hrs. After furnace treatment, degreased and bcp
A, with 1:1:3 in steps of 5 min each ( on sample app. 0.9 microns/min); total
H ) A <8 % Q time of bcp 30 min; then HPR in 2 locations axially with cavity rotating,
app. 30 min each, R@D hpr system. Cavity dried in class 10 clean room
'( $%%$ -* ; H
over night and assembled next morning (PK); attached to test stand and
) )A HA =8 <);A (
evacuated; prior to cooldown, p~ 1.2e-8 mbar, cont'd next day after
& % ;<% %
Helium top off. P. Kneisel, Feb., 2008
G. Olry, HIPPI Meeting, Sept., 2004
A
14