DESIGN OF A NEW DETECTOR TUBE

FOR SMALL-ANGLE X-RAY SCATTERING

(ID02)

Page 2 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

J. Léonardon – P. Van Vaerenbergh – T. Narayanan M. Sztucki – P. Boesecke – J. Gorini – P. Noguera – J. Osoro J. Morse – P. Berkvens – Y. Dabin – L. Goirand – D. Martin

MEDSI 2014

Vacuum: P. Guerin M. Garrec

L. Michel-Villaz

COLLABORATIVE PROJECT : ACKNOWLEDGEMENT

Page 3 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Mechanical Engineering:

P. Van Vaerenbergh J. Léonardon

L. Goirand S. Guillet (SLAC) Safety:

P. Berkvens S. Ricot

V. Landuré F. Monnier J. Brechet

… Experiments: T. Narayanan

M. Sztucki P. Boesecke

J. Gorini

AVS (subcontrator):

P. Noguera J. Osoro

M. Izaguirre M. Bereciartua

J. Fortuna

Detector & Electronics:

J. Morse J.C. Labiche J.J. Thévenin J.M. Clement H. Gonzalez M. Kocsis

Advanced Analysis & Modelling:

Y. Dabin O. Hignette

Software: L. Claustre F. Sever

Survey & Alignment:

D. Martin D. Avogadro

B. Perret G. Gatta

Building & Infrastructure: F. Torrecillas P.S. Mackrill

S. Rigotti J.M. Taormina

S. Arnaud P. Gamond

F. Pegot …

ILL: A. Perrillo-Marcone

L. Didier C. Amrouni

Old ID02 tube

Courtesy A.V.S.

SMALL-ANGLE X-RAY SCATTERING (SAXS)

Page 4 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

λ

)2/sin(4 θλπ

=qScattering vector:

Reciprocal space

Real space

Characteristic size: q

l π2≈

USAXS SAXS WAXS

q 1.10⁻³ nm⁻¹ 6 nm⁻¹

l μm nm Å

Sample Detector Beamstop

θ

Collimated X-ray beam

Å1≈λ

Goal is to measure SAXS intensities on an absolute scale over 4-5 orders of q

Vacuum

MOTIVATIONS AND SPECIFICATIONS OF THE SAXS TUBE

Page 5 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

- One unique facility for a wide q range: from WAXS to USAXS

- Three SAXS detectors remotely selectable

- Easy change of detector-sample distance

- Detectors work at 1 bar

- Easy access to the detectors

- 100μm confusion disc radius of the wagon over 30m stroke

- Quick to operate

- Minimum sample-detector distance: 500mm

Φ 2m

Wagon (detectors)

- Rigid internal frame

- Structural engineering analysis

- Innovative beamstop

- Robust personnel safety system

- 1hr to evacuate 100m³ to operation vacuum (4.10⁻²mbar)

Motivations:

Specifications: Features:

y

z

Sample

TUBE STRUCTURE AND INTERNAL FRAME

Page 6 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Tube = 5 sections + flat front flange + torispherical rear flange

Internal frame

6 circular ribs (th: 20mm; h: 52mm)

8mm thick wall

2 flanges with gasket groove (th: 60mm; h: 82mm)

6 feet supports

Section (6,74m long)

High rigidity frame

Adjustable height respect to the tube

Direct connection with feet support (to limit parasitic movement during evacuating)

SLABS AND FEET

Page 7 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

X, Y, Z adjusting bolts

4cm thick slab (SICA Grout 195)

New ID02 slab

Foot support

Tube on 2 slabs

Tube feet

Page 8 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

STRUCTURAL ENGINEERING ANALYSIS

Structural stress / CODAP 2010 σ<σ0 = 136MPa (304L)

Deformation limit parasitic movements

Flange dimensions Gaskets optimisation

Carriage optimisation No operation stop

Dynamic Natural frequency, seismic event,

window brake

Settlement stress No collapsing of the ground, no buckling of the tube

Pressure vessel certification

INSTALLATION AND ALIGNEMENT

Page 9 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Rolling pads Tunnel shape environment: Pulling cable and pushing manually

Rolling track plates

- Pre-alignement at supplier factory

- Shipment of aligned frame fixed in each section

- Alignment of first section respect to

the x-beam (adjutable feet)

- Alignment of each section respect to

the previous section and the x-beam

- Fine alignment of the master rail

- Adjustment of the slave rail respect to the master rail

- Final survey

Installation (mid-january / mid-february 2014)

Alignment

SURVEY

Page 10 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

SAXS tube movement

Movement effect Direction Peak to peak movement (μm) Timescale

Wagon Vertical (z) 65 Seconds or minutes

Vacuum Vertical (z) 130 2 hours

Vacuum shortening Longitudinal (x) 600 2 hours

Thermal/Diurnal Vertical (z) 20 1 day

Slab movements Vertical (z) 160 Weeks to months

Repeatable deformations

Wagon movement along X (beam axis)

Max. deviation

Standard repeat

Y 0.8mm 18μm

Z 0.6mm 27μm

Max. deviation

Y 0.6mm

Z 0.6mm

Laser tracker AT401

(air)

Beamviewer / x-beam

(vacuum)

Confusion disc diameter 0.6mm

over 30m stroke

WAGON AND FLEXIBLE TUBES

Page 11 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Wagon

Flexible tubes

Rear door

Cable chain

Lateral doors

Carriage on four pads

In vacuum YZ translation table

Motor box + absolute encorder

Double pinion of the motor box

Front flange of the wagon (without carbon window)

Cables entrance inside the wagon

X beam

46 cables 6 optical fibers 9 hoses

Housed in 10 flexible tubes

Carried in two cable chains

X beam

Cables exit by two horizontal tubes in the middle of the SAXS tube.

Top view

Fibrous carbon window (th: 500μm)

z

x

y

EQUIPMENTS INSIDE THE WAGON

Page 12 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Internal rack : Detector electronics Vacuum pump Air/Water exchanger

Available space for one person (for maintenance operation)

YZ detectors translation table

Detectors

Frelon 16M

Rayonix MX170

Dectris 200K

Beam viewer

BEAMSTOP

Page 13 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Lead cube (h. 2mm; w. 5mm; th. 4mm) Y and Z translations (42mm and 223mm stroke resp.) Parking position out of the active window (Φ=210mm)

Fibrous carbon window (th: 500μm)

Beamstop 1

Beamstop 2

6 aluminium frames (h. 300mm; w. 290mm; th. 3mm) Y and Z translation (40mm and 375mm stroke resp.) Frame selection by 2 magnetic actuators Elevator carries up and down the selected frames Selected frames from 0 to 6 simultaneously

Frames

Magnetic actuator

Hook

Switch

Support

Active beamstop is glued on a film which is stretched and glued on a frame

Side cut

Total thickness of the beamstop system : 162mm

y z

WAXS SYSTEM

Page 14 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Interchangeable cone with standard flange

Adjustable flange in Y and Z (±5mm stroke)

Screw and U pusher

Fix flange (for gasket pressing between adjustable flange and base flange)

Cone and adjustable flange

WAXS detector support

Rayonix LX170 support

Manually actuated

Counterweight assistance

Two positions: - Aquisition position (z=0) - Parking position (z=490mm)

Covers to avoid crush finger

z

SAFETY AND CE CERTIFICATION

Page 15 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Custom design safety systems

CE certification

ESRF -> staff and users not exposed to ionizing radiation (effective dose < 1mSv/an)

The tube provides all necessary radiation shielding :

No additional surrounding lead hutch

Wall thickness: 8mm ; Chicane on all apertures ; Additional local shielding

Personnel Safety System

- Limited access fenced area

- Badge reader for access and to operate

Limited team authorized to operate the SAXS tube

- PSS keys to enter into the tube

- 8 emergency stops inside the tube

- Anticollision system in front of the wagon

- LED Lights inside the tube

Safety inside the SAXS tube

French and European standardization

Risk assesment + User safety manual + Structural engineering analysis

CONCLUSION

Page 16 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Features:

- Confusion disc 0,6mm (5 times better than expected)

- Facility quick to operate (operation vacuum in 1hr)

- CE certified facility

Project:

- Collaborative project

Installation:

- One year beamline shutdown (July 13 – July 14)

- 2 weeks of initial commissioning

- Upgraded ID02 in operation since July 2014

And now?

- Better understanding of structural behaviour (longterm movement survey still in progress)

- Possible evolution to closed loop wagon alignment

Vacuum: P. Guerin M. Garrec

L. Michel-Villaz

THANK YOU FOR YOUR ATTENTION

Page 17 l Design of a new detector tube for SAXS l MEDSI October 2014 l J. Léonardon

Mechanical Engineering:

P. Van Vaerenbergh J. Léonardon

L. Goirand S. Guillet (SLAC) Safety:

P. Berkvens S. Ricot

V. Landuré F. Monnier J. Brechet

… Experiments: T. Narayanan

M. Sztucki P. Boesecke

J. Gorini

AVS (subcontrator):

P. Noguera J. Osoro

M. Izaguirre M. Bereciartua

J. Fortuna

Detector & Electronics:

J. Morse J.C. Labiche J.J. Thévenin J.M. Clement H. Gonzalez M. Kocsis

Advanced Analysis & Modelling:

Y. Dabin O. Hignette

Software: L. Claustre F. Sever

Survey & Alignment:

D. Martin D. Avogadro

B. Perret G. Gatta

Building & Infrastructure: F. Torrecillas P.S. Mackrill

S. Rigotti J.M. Taormina

S. Arnaud P. Gamond

F. Pegot …

ILL: A. Perrillo-Marcone

L. Didier C. Amrouni

Old ID02 tube

Courtesy A.V.S.