vertical slow drift between storage ring & beam position at ......sp vertical slow drift between sr...

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


Synchrotron SOLEIL & NANOSCOPIUM

Stability:few µm over 8h

NANOSCOPIUM: beamline dedicated to scanning hard X-ray imaging (2D, 3D)

SS

M1

SP


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


NANOSCOPIUM optical design

: OH5 : NanoProbe

Storage Ring

Source pt


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


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


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


Spatial differential processing (SDP) z


Spatial differential processing (SDP) z’


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 »


Stability test of HLS sensors z

Invar link

Steel blocks

HLS sensor

HLS sensor

-


Approximate estimation of HLS sensors stability z’

z


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


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


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


Heat diffusion through the SR wall


Heat diffusion through the SR wall

Angular variation of the straight section wall (SP) :

XBPM Z variation :

Thermal susceptibility of the straight section slab :

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 : : ( )


Heat diffusion, experimental results: June 2014

Parameter Theoretical Measuredtime shift 4


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


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

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%


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

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%


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

-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)


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


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


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

vertical slow drift between storage ring & beam position at ......sp vertical slow drift between sr...

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