Vertical slow drift between Storage Ring & beam position at ......SP Vertical slow drift between SR...
Transcript of Vertical slow drift between Storage Ring & beam position at ......SP Vertical slow drift between SR...
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 1
Vertical slow drift between Storage Ring & beam position at the secondary source of
NANOSCOPIUM at SOLEIL
A. Lestrade, C. Bourgoin, N. Jobert, N. Hubert, A. Somogyi, L. Nadolski
JC. Denard, P. Eymard, Y. Rahier, M. Ros, F. Thiam
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 2
Synchrotron SOLEIL & NANOSCOPIUM
Stability:few µm over 8h
NANOSCOPIUM: beamline dedicated to scanning hard X-ray imaging (2D, 3D)
SS
M1
SP
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 3
Summary
1) NANOSCOPIUM optics & stability/position requirements
2) HLS, stability issues & data processing
3) HLS & beam monitoring comparison
4) Experimental hall air conditioning variations
5) NANOSCOPIUM stability estimation
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 4
NANOSCOPIUM optical design
: OH5 : NanoProbe
Storage Ring
Source pt
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 5
NANOSCOPIUM HLS design
BPM9
NanoProbe
BPM2 XBPM MI-E MI-S SS-E1-2 SS-S
OH5 hutch hall SR tunnel
e- beam
hν beam
Source Point (SP) Secondary Source (SS)
M1
Survey of vertical slow drift of strategic monitors & optics
with HLS
𝑟10
𝑟1𝑛
𝑟20
𝑟2𝑛
At 𝒕 = 𝒏
At 𝒕 = 𝟎
Sensors with 1mm range
16 bits DAC for 0-10V
Half-filled rigid pipes Fogale HLS
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 6
Tidal effects on free surface of water (FSW)
-1
-0.5
0
0.5
1
-0.01
0.00
0.01
13-ju
il.
14-ju
il.
15-ju
il.
16-ju
il.
17-ju
il.
18-ju
il.
19-ju
il.
Gravity Inclination over 80m
(µrad)
HLS
"d"
varia
tions
(mm
)
Nanoscopium: Tidal effects over 80m
I13-LN-C00/EX/TANGOPARSER.1/LectHLS1/read I13-LN-C00/EX/TANGOPARSER.1/LectHLS8/read Inclination
12hHLS readings at both ends
Gravity inclination
z
12h25
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 8
Spatial differential processing (SDP) - A differential processing is necessary:
- The relative position of points does not depend on the referential
z
- Optical design defines relative z variations
z sensors & SDP configuration
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 9
Spatial differential processing (SDP) z
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 10
Spatial differential processing (SDP) z’
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 11
Spatial differential processing (SDP)
-0.010
-0.005
0.000
0.005
0.010
0.015
0.020
7/9 8/9 9/9 10/9 11/9 12/9 13/9 14/9 15/9
Read
ing
(mm
)
Date
HLS raw readings
z
-0.010
-0.005
0.000
0.005
0.010
0.015
0.020
7/9 8/9 9/9 10/9 11/9 12/9 13/9 14/9 15/9
Read
ing
(mm
)
Date
HLS SDP readings
2.3
2.35
2.4
2.45
2.5
2.55
2.6
262
263
264
265
266
267
7/9 8/9 9/9 10/9 11/9 12/9 13/9 14/9 15/9
Inclination (µrad)Dire
ctio
n (D
eg)
Date
HLS gravity vector
1 day « Machine Run »
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 15
Stability test of HLS sensors z
Invar link
Steel blocks
HLS sensor
HLS sensor
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 16
Approximate estimation of HLS sensors stability z’
z
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 17
Beam monitoring z
BPM
BPM
XB
PM
Photons
Mixing BPM & XBPM measurements in terms of displacements is relevant at constant gap
beam measurement or monitoring
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 19
HLS & (X)BPM sensors through SDP
(X)BPM
HLS
FSW
Stands
Slabs
Beam XBPM 2 BPM
20
21
22
23
24
25
26
27
28
29
30
-0.020
-0.015
-0.010
-0.005
0.000
0.005
0.010
0.015
0.020
4/6
5/6
6/6
7/6
8/6
9/6
10/6
11/6
Ambiant tem
perature (°C)
z (m
m)
HLS-Beam comparison at XBPM location through SDP
HLS XBPM 10 Moy. mobile sur pér. (SR temperature) 10 Moy. mobile sur pér. (Hall temperature)
Beam Diag
HLS
SR Temperature
Hall Temperature
z z
Strongly correlated to hall temperature
Use of SDP with HLS & beam monitors
Slab deformation
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 20
Air conditioning of the hall
Vertical gradient
1°C Superimposition of:
- vertical gradient
- 1°C appr. 24h period
SR Hall SR
Hall
Side view of the synchrotron building
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 21
Heat diffusion through the SR wall
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 22
Heat diffusion through the SR wall
Angular variation of the straight section wall (SP) :
XBPM Z variation :
Thermal susceptibility of the straight section slab :
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19.3
19.8
20.3
20.8
21.3
21.8
22.3
-0.03
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
0.05
17/6
18/6
19/6
20/6
21/6
22/6
23/6
24/6
T (°C)dz (m
m)
Thermal test Hall June 2014: Periodic deformation vs temperature
Inner wall, top, bottom
Hall ambiance:
Inner wall : : ( )
Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 23
Heat diffusion, experimental results: June 2014
Parameter Theoretical Measuredtime shift 4
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 25
Heat diffusion, experimental results : conclusion z
- However, Z & Z’ of source point are not known through this modelization
- We only can try to correlate hall temperature & HLS measurement along the beamline
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 28
Estimation of slabs displacements through SDP2 z
0.000
0.050
0.100
0.150
0.200
0.250
27/1
2
24/1
21/2
21/3
18/4
16/5
13/6
11/7 8/8
5/9
3/10
z (m
m)
Vertical displacement between straight section and OH5 slabs over 6 months
from HLS readings
0,06mm
6 months
6 Months
OH5 slab SR slab
2 BPMs (SP)
Unfavorable ratio
Raw HLS readings
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20.0
20.5
21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
-0.05
-0.04
-0.03
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
0.05
15/1
1/14
22/1
1/14
29/1
1/14
6/12
/14
13/1
2/14
20/1
2/14
27/1
2/14
T (°C)
z (m
m)
NANOSCOPIUM beam at secondary source: z stability over 8h
over 8h
Hall temperature
over 8h:success rate over 5
weeks: 80%
Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 29
Z Beam stability through NANOSCOPIUM optics
Extrapolated z variations of the beam on SS as a function of HLS
variations
Sucess rate over 5 weeks: 80%
z
No strong correlation between hall temperature and beam vertical position
at the SS location
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21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
25.5
26.0
-0.005
-0.003
-0.001
0.001
0.003
0.005
6/6/
15
13/6
/15
20/6
/15
27/6
/15
4/7/
15
11/7
/15
T (°C)
z' (m
rad)
NANOSCOPIUM beam at source point: z' stability over 8h
Hall temperature
over 8h:success rate over 3 weeks:
100%
Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 30
Z’ Beam stability through NANOSCOPIUM optics
z’ variations of the beam on M1 as a function of HLS variations
Sucess rate over 3 weeks: 100%
z’
No strong correlation between hall temperature and beam vertical position
at the SS location
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-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
78000
79000
80000
81000
82000
83000
84000
85000
86000
87000
88000
16/1
/16
23/1
/16
30/1
/16
6/2/
16
13/2
/16
20/2
/16
27/2
/16
5/3/
16
12/3
/16
19/3
/16
26/3
/16
2/4/
16
9/4/
16
16/4
/16
23/4
/16
30/4
/16
dz Beam H
LS (mm
)
Enco
deur
(wu)
NANOSCOPIUM beam at secondary source: Comparison closed loop & HLS
Closed loop encoder
Beam at SS (HLS)
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Z Beam stability through positioning closed loop z
Slow closed loop with beam diag at SS location : M2 tilt is the actuator
SP Positioning closed loop
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Unexplained peaks
Long term correlation to be studied
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 33
Conclusions
Beam monitors & HLS comparison:
- Micrometric accuracy for slow drift measurements.
Thermal daily variations of the Experimental Hall:
- Induces the straight section slab deformations
Slab z variation:
between straight section and OH5 is about 60µm over the 6 last months.
Beam stability over 8h at the secondary source:
- Reaches the 10µm stability requirement with in average a success rate of 70% but position closed loop corrects it.
- Better than the 10µrad of z’ requirement in 100% cases
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Vertical slow drift between SR & NANOSCOPIUM, IWAA 2016, Grenoble 34
Have a good lunch!!!
Slide Number 1Synchrotron SOLEIL & NANOSCOPIUMSummaryNANOSCOPIUM optical designNANOSCOPIUM HLS designTidal effects on free surface of water (FSW)Spatial differential processing (SDP)Spatial differential processing (SDP)Spatial differential processing (SDP)Spatial differential processing (SDP)Stability test of HLS sensorsApproximate estimation of HLS sensors stabilityBeam monitoringHLS & (X)BPM sensors through SDPAir conditioning of the hallHeat diffusion through the SR wallHeat diffusion through the SR wallHeat diffusion, experimental results: June 2014Heat diffusion, experimental results : conclusionEstimation of slabs displacements through SDP2Z Beam stability through NANOSCOPIUM opticsZ’ Beam stability through NANOSCOPIUM opticsZ Beam stability through positioning closed loopConclusionsSlide Number 34