MP3,07/10/2009, Z.Charifoulline 1

2kA Splice Mapping Results for RB.A78

“Special” PLI2.s1 test was done on RB.78 at 03/10/2009, 20h35-23h50;

The current steps: 0,760A,1200A,1600A,2000A,…,0 (9 plateaus) The ramp rate: 10A/sThe plateau time: >10mins.

MP3,07/10/2009, Z.Charifoulline 2

U_RES_SPLICE vs Time & I_MEAS vs Time

MP3,07/10/2009, Z.Charifoulline 3

A78.RB: BusSegment Resistance vs nQPS Unit (current flow)

MP3,07/10/2009, Z.Charifoulline 4

Noise: StdDev of U_RES on plateaus

MP3,07/10/2009, Z.Charifoulline 5

~2uV

MP3,07/10/2009, Z.Charifoulline 6

A78.RB: Normalized BusSegment Resistance

MP3,07/10/2009, Z.Charifoulline 7

A12.RB: Normalized BusSegment Resistance

MP3,07/10/2009, Z.Charifoulline 8

A78.RB: Normalized BusSegment Resistance

MP3,07/10/2009, Z.Charifoulline 9

A78.RB: Normalized BusSegment Resistance

MP3,07/10/2009, Z.Charifoulline 10

A78.RB: Normalized BusSegment Resistance & Excess

MP3,07/10/2009, Z.Charifoulline 11

num Measured Resistance

Excess Resistance

QPS Unit Bus Bar

20 1.8 ± 1.9 nΩ ~0.95 nΩ B20L8(2) B21L8 <-> A22L8

28 1.2 ± 2.2 nΩ ~1.0 nΩ B26L8(1) C26L8 <-> B27L8

66 1.5 ± 0.5 nΩ ~0.95 nΩ B17R7(1) C17R7 <-> A17R7

99 1.4 ± 0.5 nΩ ~0.80 nΩ B22R7(0) A22R7 <-> C22R7

106 1.9 ± 0.5 nΩ ~1.05 nΩ B26R7(1) C26R7 <-> B27R7

122 1.8 ± 0.3 nΩ ~0.95 nΩ B31L8(0) B32L8 <-> C31L8

124 1.7 ± 0.7 nΩ ~0.80 nΩ B31L8(2) A31L8 <-> B30L8

Top 7 excess resistances (Rexcess = Rmeas - Nsplice*Rsplice)

MP3,07/10/2009, Z.Charifoulline 12

U_RES(I) = U0 + Rbus*I + ∆α*U_MAG(I);U_MAG(I) = U0 + Rmag*I;

MP3,07/10/2009, Z.Charifoulline 13

MP3,07/10/2009, Z.Charifoulline 14

A8R7,A10R7,A12R7,…,A34R7 <– 27 magnets are missing;