1. ALIGNMENT STRATEGY OF SESAME T. Abu-Hanieh, SESAME, Jordan
SESAME Synchrotron-light for Experimental Science and Applications in the Middle East
ALIGNMENT STRATEGY OF SESAME
T. Abu-Hanieh, SESAME, Jordan
IWAA2014, IHEP, Beijing, China October 2014

2. SESAME Mission
Foster excellent science and technology in the Middle East and prevent or reverse the brain drain
Build bridges between diverse societies
SESAME-Members:
Bahrain, Cyprus, Egypt, Israel, Iran, Jordan, Pakistan, Palestine, Turkey.
Observers:
Brazil, China, France, Germany, Greece, Italy, Japan, Kuwait, Portugal, Russia, Sweden, Switzerland, UK and USA.
SESAME is the first international 3rd generation synchrotron light source in the Middle East region, under construction in Jordan.
It will promote peace and understanding through scientific cooperation and bring new scientific fields to the region.
SESAME consists of 9 Countries.
IWAA2014, IHEP, Beijing, China October 2014

3. Layout of SESAME Showing Phase1 BeamlinesIR
Energy; 2.5 GeV
Circumference; 133m
12 Insertion Devices
13 Bending Magnet beamlines
Maximum beamline length; 37m
Space for future full energy injector in main ring tunnel
EUV BL
SAXS-WAXS
The injector of the facility consists of a 22.5 MeV Microtron and 800 MeV Booster, from BESSY I. The 2.5 GeV main Storage Ring (SR) is completely new.
Seven beamlines are envisaged in Phase I.
with a space for full energy booster in the future. PX
VUV PD
XRF-XAFS
IWAA2014, IHEP, Beijing, China October 2014

4. Status of SESAME Machine
After the completion of the shielding walls; SESAME’s Microtron became operational in 2012.
Installation of its Booster was completed in 2013.
And on 3rd September, 2014 the SESAME team succeeded in accelerating the electrons in the Booster to their final energy of 800 MeV.
Successfully having brought SESAME’s Booster to full operation is of particular significance since this is the first high-energy accelerator in the Middle East.
This success will open the path for the final goal, which is to make SESAME the first operational Synchrotron Light Source in the Middle East.
IWAA2014, IHEP, Beijing, China October 2014

5.
For further information about SESAME, have a look on SESAME’s Website under this link.
IWAA2014, IHEP, Beijing, China October 2014

6. Booster Main Components & Diagnostics
Injection septum
TL1 screen
TL1 FCT
Screen 1
(Original)
RF cavity
BPM 2
BPM 1
Screen 2
(Original)
BPM 6
Full-turn screen
(Original)
FCT + DCCT
Hor. Corrector
BPM 5
with CT
SESAME’s Booster consists of 6 Cells, with 12 BM, and 18 Quads.
You can see there are also Injection septum, injection and extraction kickers, extraction septum, RF cavity, correctors, screens, BPMs.
BPM 4
BPM 3
Extraction septum
Extraction kicker
VL Diagnostic
beam line
Injection kicker
IWAA2014, IHEP, Beijing, China October 2014

7. Alignment Team, Collaboration, Instrumentation
The Survey and Alignment work is one of the Mechanical Engineering Group tasks, the group consists of three Mechanical Engineers; One is 50% dedicated for the Survey and Alignment.
Developing Alignment Strategy, designing the Alignment Network and Optimising the Network needs dedicated efforts and knowledge. To perform these in a right and accurate way; the group has strong collaboration with Soleil Synchrotron (Alignment Group).
Industrial Total Station (TDA5005).
Automatic Level (NA2)
SESAME uses three softwares from SOLEIL for the measurements and calculations: EXCEL sheet “Offset et Reglage”, Pilot-TDA.exe, and Reseau with MatLab.
SESAME has purchased Spatial Analyzer software and will start using it .
IWAA2014, IHEP, Beijing, China October 2014

8. Alignment Network
The Alignment Network at SESAME is made of set of wallbrackets and floor nails (brass) spread all around the accelerators and beamlines.
Wall brackets are cast aluminum Wall Brackets, very stiff, light, and extremely stable; used as references with accurate positions; they are used to hold the TDA5005 and its Reflector; they act as absolute and accurate mechanical references.
IWAA2014, IHEP, Beijing, China October 2014

9. Primary Alignment Network Measurement
The primary geodesic network is made of 16 wall brackets installed on the concrete columns surrounding the experimental hall.
The measurements have been carried out with Leica total station TDA5005.
IWAA2014, IHEP, Beijing, China October 2014

10. Primary Alignment Network Measurement
The calculations of the final wall bracket planimetric co-ordinates were obtained by a least square bundle adjustment performed by SOLEIL’s software called reseau.m and developed with MatLab.
The error for the angle measurements was deg, and for the distance measurements was 0.15 mm.
Two wall brackets out of the 16 have been fixed later for the line of sight on the exact diameter of the SR.
IWAA2014, IHEP, Beijing, China October 2014

11. Line of Sight through Shielding Walls
Primary survey network and Line of Sight through Shielding Walls.
IWAA2014, IHEP, Beijing, China October 2014

12. Floor Nails on Beam Path
Brass Nails have been sealed at the floor surface level, on which we carved small hole on its surface that is accurately measured on the beam projected axes.
163 points have been traced as follows: two points defining TL1, 18 points for the Booster, 10 points defining TL2, 33 points defining SR, 100 points defining Beamlines.
These nails have been used to mark the axes of the accelerator on the floor to organize the tracing of the girders later on. In addition, these nails are useful for having reference points inside the closed areas (BOO & SR after having realized the shielding) for general purpose.
IWAA2014, IHEP, Beijing, China October 2014

13. Leveling Benchmarks
Steel nails are installed as leveling Benchmarks, 3 in the Booster area and 8 in the Storage Ring.
All leveling measurements were done using NA2 Automatic Level.
The measurements were done in three steps: Station at the Booster centre, Station at the Storage Ring centre, and 8 Stations between each Leveling Benchmark as a closed traverse.
The Z of the SR & BL beams are defined by Z = 0.
The Z of the BOO beam is then defined by Z = -200 mm.
Later on, after installing booster girders, 7 new nails have been installed on new positions to ease the measurements and strengthen the network.
The height of the Booster beam is 1200 mm, and of the SR beam is 1400 mm.
IWAA2014, IHEP, Beijing, China October 2014

14. Booster Alignment Booster Tolerances
Girder
Dipole
Quadrupole
S (mm) ±2
±0.5
X (mm)
±0.2
Z (mm)
S (mrad)
X (mrad)
Z (mrad) ±1
These figures shown in this Table have to be applied for Booster magnets & girders in terms of positioning with respect to the nominal orbit.
This Fig. shows the definition of reference axes where Longitudinal axe (along the propagation of the electrons) is named S axe, Transversal axe is named X axe and Vertical axe is named Z axe, this orthonormal system is then S, X, Z.
Four wall brackets have been installed in the BOO tunnel; where after the wall brackets installation a survey of the set WB-brass nails were done to do the calculation of the WB coordinates with respect to brass nails.
IWAA2014, IHEP, Beijing, China October 2014

15. Booster Girders Installation
Tracing the approximate location of the girders feet of the Booster.
The screw holes of the six girders are not accurately machined; the distance between the holes can vary of about 5mm from a foot to another, which is challenging for the positioning of the drilling holes with respect to the girder; so each girder will be used as its own template for drilling the holes into the slab.
The booster girders are fixed with chemical anchors directly on the slab.
IWAA2014, IHEP, Beijing, China October 2014

16. Booster Magnets Installation
After installing the girders, dipoles and quadrupoles are installed on the girders.
6 Girders, 12 Dipoles, 18 Quads have been installed.
IWAA2014, IHEP, Beijing, China October 2014

17. Booster Magnets Fiducials
Two survey monuments are on the top surface of the dipoles.
No information from BESSY1 about their exact location with respect to the magnetic centre.
The monuments location with respect to the magnetic definition of the dipole has been measured by mechanical measurements where finding the magnetic axes of the dipole is not necessary.
A gauge have been designed and used for the alignment of the Qpoles. The gauge is equipped with three contact points and a pair of small fiducials (ø24mm) and used in two reversed positions to define the Qpole axes. The gauge also is in contact with the laminas by means of three shoulders, one on a side and two on the other side.
IWAA2014, IHEP, Beijing, China October 2014

18. Booster Magnets Pre-Alignment
A pre-alignment in collaboration with Soleil’s alignment group has been performed on all the Qpoles and dipoles in order to make an accurate survey, this operation allows to set the magnets close to their theoretical position (within ±1mm in S, X, Z and less than ± 0.5mrad)
The result of the survey shows that a fine tuning is requested for several magnets
IWAA2014, IHEP, Beijing, China October 2014

19. Booster Magnets Final Alignment
A second Survey has been done to check the position of all the magnets after the corrections that have been done, there were still some magnets out of range. This process has been repeated until all the magnets are in a correct position
Measurement uncertainty: ±0.05mm, 1 sigma for X and Z axis, ±0.15mm, 1 sigma for S axis and ±0.05mrad 1 sigma for Tilt
IWAA2014, IHEP, Beijing, China October 2014

20. Pulsed Magnets
The pulsed magnets have been opened inside the vacuum lab, for measuring and aligning the active parts inside, and taking the offsets to be installed inside Booster Tunnel.
Because of a lack of documentation, the accelerator physicist had to calculate the position of the beam inside these pulsed magnets
Since no enough information from Bessy1 about them.
For example, extraction and injection kicker.
IWAA2014, IHEP, Beijing, China October 2014

21. Transfer Line 1 (TL1)
TL1 is composed from two sets of two magnets embedded in metal flanges. The TDA5005 has been placed exactly on the theoretical position of the beam and using Plexiglas targets, the magnets and girders have been set in place. As the vacuum chamber is cantered on the poles of the magnets and as it wasn’t possible to measure the poles directly, the vacuum chamber has been used as the reference for centring these magnets.
IWAA2014, IHEP, Beijing, China October 2014

22. Microtron
The Microtron has been set up to its theoretical position, using the free station technique by placing the TDA exactly on the theoretical axis of TL1.
Rs rotation is done by measuring two points of the Microtron flanges, the horizontality is realised when the two points have the same x coordinate (it means the two points are perfectly vertical with respect to each other within the Microtron flange’s tolerance)
IWAA2014, IHEP, Beijing, China October 2014

23. Next Steps … Quadrupoles monuments
Designing, installing, and measuring new permanent fiducials booster quadrupoles to be used for the survey in the future instead of the long and hard process of using the heavy quadrupole gauge.
Spatial Analyzer Software
Getting Trained on SA software, and making a full survey of booster magnets to compare the SA results with the MatLab results calculated by Soleil’s software.
Laser Tracker
SESAME is in the process of purchasing a new Laser Tracker; this will enhance the capabilities of the alignment work at SESAME. Training on the Laser Tracker is required and will be planned to.
TL2 Installation and Alignment
Installing all the girders, magnets, and components of transfer line2 on their right positions, and doing the fine alignment required to deliver the beam from the booster ring to the storage ring.
Storage Ring Alignment Network
Installing the wallbrackets inside the SR tunnel, surveying the set WB-brass nails to do the calculation of the WB co-ordinates. Then, tracing the locations of SR girders and installing them, followed by the installation of storage ring magnets.
IWAA2014, IHEP, Beijing, China October 2014

24. SESAME, someday 
SESAME is now at a key transitional stage moving from construction activities through into machine installation and commissioning.
The booster network is installed and qualified, and the storage ring network in the process.
Future work activities include the installation and pre-alignment of storage ring components and the installation of phase 1 beamlines.
The development of survey and metrology techniques during this next phase of the project provides exciting challenges for SESAME Survey Team
And we hope to SESAME under operation like this.
IWAA2014, IHEP, Beijing, China October 2014

25. Thank You
IWAA2014, IHEP, Beijing, China October 2014