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June 14th 2005 Accelerator Division Overview of ALBA D. Einfeld Vacuum Workshop Barcelona, 12 th -13 th September 2005 General 10 th September 2005

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June 14th 2005 Accelerator Division Table of contents 1.) General information’s 2.) Lattice of ALBA 3.) Special components of the storage ring 4.) Booster synchrotron 5.) Insertion devices General 10 th September 2005

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June 14th 2005 Accelerator Division 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 Horiz. Beta- function Vert. Beta- function Horiz. Disp.- function General 10 th September 2005

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June 14th 2005 Accelerator Division General 10 th September 2005 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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June 14th 2005 Accelerator Division General 10 th September 2005 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 (<270m). 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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June 14th 2005 Accelerator Division 100MeV Linac 3GeV Synchrotron 3GeV Storage Ring General Parameters E=3GeV I=400mA ε x =4.3nmrad C SR =268.8 m C B =249.6m 10 th September 2005 Experimental Area Exper. Area Exper. Area

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June 14th 2005 Accelerator Division 100 MeV LINAC at SLS General SLS-TUNNEL WITH BOOSTER AND STORAGE RING Storage Ring Booster Synchrotron 10 th September 2005

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June 14th 2005 Accelerator Division General 10 th September 2005 2.) Lattice of ALBA

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June 14th 2005 Accelerator Division Investigated lattices: -4 fold, 16 cell TBA: x =1.8nmrad, 16 straights, but bad dynamic aperture (DA) and not so good lifetime. - 4 fold, 16 cell expanded DBA: x 3.7nmrad, 24 straights, good DA and lifetime. -3 fold, 18 cell DBA: x =2.7 nmrad, but smaller DA and lifetime, and larger cross section. -4fold, 16 cell DBA: x nmrad, 16 straights (without short straights), larger x and chromaticities. → The Experimental Division selected the “ 4 fold, 16 cell expanded DBA-lattice ” 10 th September 2005

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June 14th 2005 Accelerator Division Lattice 10 th September 2005 Matching Cell Unit Cell The machine functions in one quadrant of ALBA

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June 14th 2005 Accelerator Division SymbolValueUnit Energy E 3.0GeV Circumference C 268.8m Horizontal emittance ε 4.3nm-rad Energy Spread ΔE/E 1.05*10 -3 Hor.-Chromaticity ξ x -38.0 Vert.-Chromaticity ξ y -27.0 Moment.-Comp.-Factor α(1) 8.8*10 -4 Horizontal Tune Qx 18.78 Vertical Tune Qy 8.378 Harmonic Number h 448 Energy Loss per Turn MeV 1.03 Damping Timeτ x, τ y, τ s 4.1, 5.3, 3.1ms Main Parameters of ALBA Lattice 10 th September 2005

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June 14th 2005 Accelerator Division x = 131 m y = 7.4 m ‘ x = 46.6 rad ‘ y = 5.8 rad ‘ r = >4 rad The matching cell of ALBA x = 260 m y = 15.7 m ‘ x = 20.5 rad ‘ y = 2.7 rad ‘ r = >4 rad Lattice 10 th September 2005

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June 14th 2005 Accelerator Division Arrangements of magnets within the Matching Cell Bending Quads Sext Sextupoles Sext Bending Quad Quads Arrangements of magnets within the Unit Cell Sext Magnets

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June 14th 2005 Accelerator Division Lattice 10 th September 2005

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June 14th 2005 Accelerator Division General 10 th September 2005 3.) Special components of the storage ring

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June 14th 2005 Accelerator Division Magnets 10 th September 2005 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: <3*10 -3 Grad. accuracy: <2*10 -3 Bending magnet Field at pole tip:0.715 T Gradient:23.43 T/m Aperture:61 mm Current:190 A Field accuracy: <3*10 -3 Grad. accuracy: <2*10 -3 Length (mm): 200, 260 310, 530 Quadrupole magnets: Field at pole tip:0.450 T Diff. Gradient:700 T/m 2 Aperture:72 mm Current:200 A Field accuracy: <3*10 -3 Grad. accuracy: <2*10 -3 Length (mm): 150, 220 Sextupole Magnets Horizontal and vertical steering as well as skew quadrupole coils are present on each sextupole Type of magnetsStorage RingBooster Dipoles3240 Quadrupoles11260 Sextupoles12018 Correctors120100 Pulsed magnets3+12+2

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June 14th 2005 Accelerator Division The Unit Cell Vacuum Bending Quad Sext Pump Pumps Pump Pumps Pump

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June 14th 2005 Accelerator Division 10 th September 2005 Girder

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June 14th 2005 Accelerator Division Total Voltage3.6MV No Cells/IPC6 Type of cavitync Voltage / cell600kV R shunt 3.0MΩ Cavity power60kW Beam power/cav87kW IPC power147kW Amplifier Power160kW Total Power960kW RF-Sysrem 10 th September 2005

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June 14th 2005 Accelerator Division 3.Cavity Combiner 2 Input Ports (80 kW each one) 1 Output Port (150 kW) Insertion losses0.3 dB Frequency stability 200 kHz IOT 1 IOT 2 RF cavity 4.RF amplifiers (IOT) Inductive Output Tubes at 500 MHz Broadcasting standard 80 kW output power 3 MHz bandwidth at -1 dB 50 impedance Radio.-Freq.-System

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June 14th 2005 Accelerator Division General 10 th September 2005 4.) Booster Synchrotron

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June 14th 2005 Accelerator Division 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 The machine functions in one quadrant of ALBA booster synchrotron

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June 14th 2005 Accelerator Division General 10 th September 2005 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 σ x = 0.3 mm σ y = 0.05 mm

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June 14th 2005 Accelerator Division General 10 th September 2005 5.) Beam lines and insertion devices

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June 14th 2005 Accelerator Division 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) Phase I beam lines

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June 14th 2005 Accelerator Division Bending- Diagnostics Wiggler - EXAFS Bending - Microscopy U21 – Macromolecular Cristalography U21 – Non Cristaline Diffraction Bending – Test SC wiggler Powder diffraction EPU63 Photoemission spectroscopies EPU63 Polarization dependent spectroscopies

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June 14th 2005 Accelerator Division 4.― In-vacuum devices Insertion Devices

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June 14th 2005 Accelerator Division Thank you very much

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June 14th 2005 Accelerator Division General 10 th September 2005

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