Overview of ALBA

1
General
Overview of ALBA D.
Einfeld Vacuum Workshop Barcelona,
12th -13th September 2005
10th September 2005
2
General
Table of contents 1.) General informations 2.)
Lattice of ALBA 3.) Special components of the
storage ring 4.) Booster synchrotron 5.)
Insertion devices
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3
General
Machine functions of LLS (1997) TBA-Lattice
Parameters E 2.5 GeV C 252 m N 12 fold ?
10 degr. ?x 8.6 nmrad l 8.0 ?x 13.7 ?y
5.33 ?x 344 ?m ?y 21.5 ?m
Vert. Beta- function
Horiz. Beta- function
Horiz. Disp.- function
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General

• Comments
• The budget for the project is fixed (170 Mill
  EURO).
• The LLS-design is pretty much as the ALS-design.
• Investigation of a new lattice to reduce the
  emittance.
• Mini-beta section should be introduced.
• Number of straight sections should be increased.
• ? A redesign of the machine has to be done

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General
1.) The budget is fixed according to the design
of LLS (177.9 Mill. EURO) 2.) With the available
budget also the circumference is fixed
(lt270m). 2.) The energy should be 3 GeV in order
to reach with in-vacuum undulators photon
energies of 15 to 20 KeV. 2.) The emittance has
to be in the range of modern synchrotron light
sources (smaller as 5 nmrad) 3.) The
machine should be optimised for a high flux
density ( introduction of mini beta sections in
the straights) 4.) The lifetime should be large
(?topping up has to be used) 5.) All injection
elements should be in one straight (? length 8
m ) 6.) The booster should be in the same tunnel
as the storage ring (SLS-model)
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General
Experimental Area
3GeV Storage Ring
3GeV Storage Ring
100MeV Linac
3GeV Synchrotron
Exper. Area
Exper. Area
Parameters E3GeV I400mA ex4.3nmrad CSR268.8
m CB249.6m
3GeV Storage Ring
3GeV Storage Ring
Experimental Area
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General
100 MeV LINAC at SLS
SLS-TUNNEL WITH BOOSTER AND STORAGE RING
Storage Ring
Booster Synchrotron
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General
2.) Lattice of ALBA
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• Investigated lattices
• - 4 fold, 16 cell TBA ex1.8nmrad, 16
  straights, but bad dynamic aperture (DA) and not
  so good lifetime.
• - 4 fold, 16 cell expanded DBA ex3.7nmrad, 24
  straights, good DA and lifetime.
• - 3 fold, 18 cell DBA ex2.7 nmrad, but smaller
  DA and lifetime, and larger cross section.
• 4fold, 16 cell DBA ex4.3 nmrad, 16 straights
  (without short straights), larger ex and
  chromaticities.
• ? The Experimental Division selected the 4 fold,
  16 cell expanded DBA-lattice

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Lattice
The machine functions in one quadrant of ALBA
Matching Cell
Matching Cell
Unit Cell
Unit Cell
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Lattice
Main Parameters of ALBA
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Lattice
The matching cell of ALBA
?x 131 ?m ?y 7.4 ?m ?x 46.6 ?rad ?y 5.8
?rad ?r gt4 ?rad
?x 260 ?m ?y 15.7 ?m ?x 20.5 ?rad ?y 2.7
?rad ?r gt4 ?rad
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Magnets
Arrangements of magnets within the Matching Cell
Sextupoles
Sext
Sext
Bending
Quads
Bending
Quads
Quads
Arrangements of magnets within the Unit Cell
Sext
Sext
Sext
Sext
Quad
Quad
Bending
Bending
Quads
Quads
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Lattice
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15
General
3.) Special components of the storage ring
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Magnets
Bending magnet
Magnetic field 1.42 T Gradient
5.8 T/m Bending angle 11.25 deg. Bending
radius 7.047 m Gap 36 mm Current 520 A Field
accuracy lt310-3 Grad. accuracy lt210-3
Quadrupole magnets
Sextupole Magnets
Field at pole tip 0.715 T Gradient 23.43
T/m Aperture 61 mm Current 190 A Field
accuracy lt310-3 Grad. accuracy
lt210-3 Length (mm) 200, 260
310, 530
Field at pole tip 0.450 T Diff. Gradient 700
T/m2 Aperture 72 mm Current 200 A Field
accuracy lt310-3 Grad. accuracy
lt210-3 Length (mm) 150, 220
Horizontal and vertical steering as well as skew
quadrupole coils are present on each sextupole
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Vacuum
The Unit Cell
Sext
Sext
Sext
Sext
Quad
Quad
Bending
Bending
Quad
Quad
Pumps
Pump
Pump
Pumps
Pump
Pump
Pump
Pump
Pump
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Girder
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RF-Sysrem
Total Voltage 3.6 MV No Cells/IPC 6 Type of
cavity nc Voltage / cell 600 kV Rshunt 3.0 M? Ca
vity power 60 kW Beam power/cav 87 kW IPC
power 147 kW Amplifier Power 160 kW Total
Power 960 kW
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Radio.-Freq.-System

• Cavity Combiner
• 2 Input Ports (80 kW each one)
• 1 Output Port (150 kW)
• Insertion losses 0.3 dB
• Frequency stability 200 kHz

RF cavity
IOT1
IOT2

• RF amplifiers (IOT)
• Inductive Output Tubes at 500 MHz
• Broadcasting standard
• 80 kW output power
• 3 MHz bandwidth at -1 dB
• 50 ? impedance

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General
4.) Booster Synchrotron
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The machine functions in one quadrant of ALBA
booster synchrotron
Parameters E 3.0 GeV C 249.6 m N 4
fold ?x 9.0 nmrad ?x 11.1 m/rad ?y 2.2 m/rad
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General
The beam cross sections in one quadrant of ALBA
booster synchrotron
Parameters E 3.0 GeV C 249.6 m N 4
fold ?x 9.0 nmrad sx 0.3 mm sy 0.05 mm
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General
5.) Beam lines and insertion devices
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? High-resolution powder diffraction and
microfocus (In-Vac-Und., Wi. Or SC-Wi) ?
Macromolecular crystallography (In-Vac-Und.,
U21) ? Non-crystalline diffraction in Life and
Materials Sciences with Modular Microfocus Option
(In-Vac-Und., U21) ? High brilliance XAS
(X-ray absorption Spectroscopy) ( Wi. Or SC-Wi)
? POLUX A soft X-ray beam-line for
polarisation-dependant spectroscopies
and microscopies. (Apple II) ? EXES A
beam-line for electron and soft X-ray emission
spectroscopies (Apple II) ? X-ray microscopy
(Bending)
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Bending- Diagnostics
EPU63 Polarization dependent spectroscopies
EPU63 Photoemission spectroscopies
Wiggler - EXAFS
SC wiggler Powder diffraction
Bending - Microscopy
Bending Test
U21 Macromolecular Cristalography
U21 Non Cristaline Diffraction
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Insertion Devices
4.? In-vacuum devices
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Thank you very much
29
General
10th September 2005