pressure and e-cloud measurements sps’ md run 19/20.10.2010 and 10.11.2010
DESCRIPTION
Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010. 2 different bunch spacings , 50ns (24 and 36 bunches/batch) and 25ns (36 and 72 bunches/batch) Pressure reading between coated MBBs, e-cloud monitors and reference gauge Data aquisition from e-cloud monitors - PowerPoint PPT PresentationTRANSCRIPT
Holger Neupert TE/VSC
Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010
• 2 different bunch spacings, 50ns (24 and 36 bunches/batch) and 25ns (36 and 72 bunches/batch)• Pressure reading between coated MBBs, e-cloud monitors and reference gauge• Data aquisition from e-cloud monitors• Is there a simple correlation between e-cloud currents and pressure rise?
11/17/2010
Holger Neupert TE/VSC
Configuration Liner and Gauge
11/17/2010
Holger Neupert TE/VSC
Configuration MBBs and Gauges
VGHB_51540 between coated and uncoated MBB always reads highest pressure, probably due to contaminated MBB 51550
11/17/2010
Holger Neupert TE/VSC
Pressure Data Overview
11/17/2010
10-8
10-7
10-6
10-5
03.0
9.2
010
11:
10:0
5
03.0
9.2
010
12:
04:2
2
03.0
9.2
010
12:
59:0
4
03.0
9.2
010
13:
47:2
2
03.0
9.2
010
14:
40:2
6
03.0
9.2
010
15:
29:4
2
03.0
9.2
010
16:
18:4
5
03.0
9.2
010
17:
06:1
8
03.0
9.2
010
17:
53:5
5
MD_20100903_080003_180533
VGHB_51540VGHB_51480VGHB_51340
p/m
bar
Date/Time
4 batches of 36 bunches
1.2 1011 Protons/bunch
3 batches of 36 bunches
2 batches of 36 bunches
1 batch of 36 bunches
Holger Neupert TE/VSC
Pressure Data Details
10-8
10-7
10-6
10-5
04
.09
.20
10
03
:07
:19
04
.09
.20
10
03
:08
:09
04
.09
.20
10
03
:08
:59
04
.09
.20
10
03
:09
:49
04
.09
.20
10
03
:10
:39
25ns Bunch SpacingMD_20100904_030425_110002
VGHB_51540VGHB_51480VGHB_51340
p/m
bar
Date/Time
25ns bunch spacing4 batches of 72 bunches
1 *1011 Protons/bunch
total I = 3*1013
10-8
10-7
10-6
10-5
03
.09
.20
10
19
:54
:37
03
.09
.20
10
19
:55
:27
03
.09
.20
10
19
:56
:17
03
.09
.20
10
19
:57
:07
03
.09
.20
10
19
:57
:57
50ns Bunch SpacingMD_20100903_180534_030424
VGHB_51540VGHB_51480VGHB_51340
p/m
bar
Date/Time
50ns bunch spacing4 batches of 36 bunches
1.1 1011 Protons/bunch
total I = 1.6*1013
Pmax/SuperCycleDifferent Gauges
1 SuperCycle
11/17/2010
Holger Neupert TE/VSC11/17/2010
1 1.5 2 2.5 3 3.5 4
x 105
0
1
2
3
4
5x 10
-8 50ns, 24bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
0
0.5
1
1.5
2
2.5
3
3.5x 10
-7 50ns, 36bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
1
2
3
4
5
6
7
8x 10
-8 25ns, 36bunches
intBCT/a.u.
max
p/m
bar
3 4 5 6 7 8 9 10 11
x 105
0
0.2
0.4
0.6
0.8
1x 10
-6 25ns, 72bunches
intBCT/a.u.
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51824
Holger Neupert TE/VSC11/17/2010
1 1.5 2 2.5 3 3.5 4
x 105
0.5
1
1.5
2
2.5
3
3.5
4x 10
-8 50ns, 24bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
0
0.5
1
1.5
2x 10
-7 50ns, 36bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
1
2
3
4
5
6x 10
-8 25ns, 36bunches
intBCT/a.u.
max
p/m
bar
3 4 5 6 7 8 9 10 11
x 105
0
1
2
3
4
5
6
7
8x 10
-7 25ns, 72bunches
intBCT/a.u.
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51824
Holger Neupert TE/VSC11/17/2010
1 1.5 2 2.5 3 3.5 4
x 105
0.5
1
1.5
2
2.5
3
3.5
4x 10
-8 50ns, 24bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
0
0.5
1
1.5
2x 10
-7 50ns, 36bunches
intBCT/a.u.
max
p/m
bar
1.5 2 2.5 3 3.5 4 4.5 5 5.5
x 105
1
2
3
4
5
6x 10
-8 25ns, 36bunches
intBCT/a.u.
max
p/m
bar
3 4 5 6 7 8 9 10 11
x 105
0
1
2
3
4
5
6
7
8x 10
-7 25ns, 72bunches
intBCT/a.u.
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51824
VGHB_51340_new
VGHB_51480_newVGHB_51824_new
Holger Neupert TE/VSC
-14000 -12000 -10000 -8000 -6000 -4000 -2000 0 20000
1
2
3
4
5x 10
-8 50ns, 24bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-6 -5 -4 -3 -2 -1 0
x 104
0
0.5
1
1.5
2
2.5
3
3.5x 10
-7 50ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-14 -12 -10 -8 -6 -4 -2
x 104
1
2
3
4
5
6
7
8x 10
-8 25ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-4 -3.5 -3 -2.5 -2 -1.5 -1
x 105
0
0.2
0.4
0.6
0.8
1x 10
-6 25ns, 72bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51824
11/17/2010
Holger Neupert TE/VSC
-12000 -10000 -8000 -6000 -4000 -2000 00.5
1
1.5
2
2.5
3
3.5
4x 10
-8 50ns, 24bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-6 -5 -4 -3 -2 -1 0
x 104
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
x 10-7 50ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-14 -12 -10 -8 -6 -4 -2
x 104
1
2
3
4
5
6x 10
-8 25ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-4 -3.5 -3 -2.5 -2 -1.5 -1
x 105
0
1
2
3
4
5
6
7
8x 10
-7 25ns, 72bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51540
11/17/2010
Holger Neupert TE/VSC
-12000 -10000 -8000 -6000 -4000 -2000 00.5
1
1.5
2
2.5
3
3.5
4x 10
-8 50ns, 24bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-6 -5 -4 -3 -2 -1 0
x 104
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
x 10-7 50ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-14 -12 -10 -8 -6 -4 -2
x 104
1
2
3
4
5
6x 10
-8 25ns, 36bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
-4 -3.5 -3 -2.5 -2 -1.5 -1
x 105
0
1
2
3
4
5
6
7
8x 10
-7 25ns, 72bunches
ecloud/nC/SuperCycle on SS (XSD2)
max
p/m
bar
VGHB_51340
VGHB_51480VGHB_51540
VGHB_51340_10.11.2010
VGHB_51480_10.11.2010
VGHB_51824_10.11.2010
11/17/2010
Holger Neupert TE/VSC11/17/2010
2 3 4 5 6 7 8 9 10 11
x 105
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0x 10
5 all beams averages 1,2,3 and 4 batches
intBCT/a.u.
eclo
ud/n
C/S
uper
Cyc
le o
n S
S (
XS
D2)
50ns 24bunches
50ns 36bunches25ns 36bunches
25ns 72bunches
Holger Neupert TE/VSC
2 3 4 5 6 7 8 9 10 11
x 105
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0x 10
5 all beams averages 1,2,3 and 4 batches
intBCT/protons
eclo
ud/n
C/S
uper
Cyc
le o
n S
S (
XS
D2)
50ns 24bunches
50ns 36bunches
50ns 36bunches 10.11.201025ns 36bunches
25ns 72bunches
11/17/2010
Holger Neupert TE/VSC
Discussion
• Are Pressure Gauges the right tool to measure e-cloud activity?
• Causes the same beam (type) always the same e-cloud?
• Thanks for your attention!
11/17/2010