ASTRID2, a new 580 MeV low-emittance light source in Århus

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Johnathan Benson
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1 , a new 580 MeV low-emittance light source in Århus Brief introduction to ASTRID, ISA and Aarhus University Other accelerator activities during recent years Pre-history of Our new grant for Time plan Future? 1

2 ASTRID ASTRID was built as a heavy-ion storage ring and a Synchrotron Radiation source Operating with ions in 1990 Since then many ion experiments have been performed including ions like H 2+, Mg +, 13 CO ++, C 60 + H -, O -, Al 12-, C 70 - studying laser-cooling, electron-cooling, photo-detachment, electronrecombination and dissociation Inaugurated with electrons in 1993 For ~10 years 50%/50% operation with ions and electrons Last ion run in

3 ASTRID and injectors undulator 105 MHz cavity Electron cooler 580 MeV electrons 40 m 1.6 T 140 nm (~5% coupl) Lifetime h 100 MeV electron microtron 150 kev Ion 3 separator

4 4

5 ASTRID acceleratorlaboratory students 5 Gkr. 2/3 on CAMPUS 5

6 ASTRIDs below parking place 6

7 ASTRID as a virgin 7

8 Synchrotron-radiation beamlines at ASTRID 8

9 ASTRID RF cavity 105 MHz cavity (Q~1.37MΩ) 20 kw transmitter 9

10 ASTRID undulator 10

11 Lifetime in ASTRID Current [ma] Lifetime [hour]

12 ASTRID beamlines Beamline Spectral range Performance Research area SGM 1 30 to 600 ev Resolving power 5 to 14,000 Typical flux ph/sec Condensed matter and nanoscale physics SX to 700 ev Resolving power typically 1000 Typical flux photons/sec Condensed matter and nanoscale physics X-ray Microscope 1.5 to 3 nm ev Resolving power 2,000 Typical flux ph/sec X-ray Microscopy, Medical Research MIYAKE 15 to 180 ev Resolving power 2,000 Flux photons/sec Atomic and Molecular Physics SGM 2 12 to 40 ev Resolving power up to 24,000 Typical flux ph/sec Atomic and Molecular Physics SGM 3 8 to 150 ev Resolving power up to 23,000 Typical flux ph/sec Condensed matter and nanoscale physics UV to 12 ev Resolving power 1,000 to 5,000 Typical flux ph/sec Photobiology, UV Spectroscopy CD to 12 ev Typical resolving power 200 Flux > photons/sec Biology: circular and linear dichroism spectroscopy 12

13 USE of ASTRID ASTRID operates > 40 weeks per year, 6½ days x 23.5 hours ~150 users per year ~50 % from abroad partly financed from IA-SFS (transnational access) ~25% from Aarhus ~25 % from elsewhere in DK 13

14 Other accelerator activities during recent years ELISA ANKA microtron and booster CLS booster ASP booster FLASH bypass PT facilities In collaboration with DESY, DANFYSIK, Siemens, MAXLAB and others 14

15 ELISA as a virgin 15

16 160 deflectors 10 deflector quadrupoles 16

17 50 MeV microtron and 500 MeV Søren Pape booster Møller synchrotron for ANKA 17

18 3 GeV booster synchrotron Canadian Light Source, 18

19 3 GeV booster synchrotron for Australian Synchrotron Project 100 MeV - 3 GeV Ø m 1 Hz, 5 ma ε H = 33 nm 19

20 Particle Therapy facility (Marburg) MeV p MeV/u C 10 m 20

21 M1 EnS G ExS M5 M2 M3 M4 Seeding option for VUV Free Electron Laser DESY, Hamburg 21

22 Funding for has been sought for several years Research Infrastructure Fund Dec Mkr. (we applied for 42 Mkr) over 4 years Funds for ASTRID modifications, transfer beamline,, 2 ID s, some adaptions/improvements to ASTRID beamlines : low-emittance (<10nm) 580 MeV SR source Top-up from ASTRID undulator radiation up to ~100 ev MPW radiation up to 600 ev O edge) Research: condensed matter/surfaces/nanoscale atomic and molecular physics BIO 22

23 23

24 24

25 parameters Parameter Energy Circumference Current Lifetime Horizontal emittance Characteristic energy Characteristic wavelength MeV m ma Hours nm ev nm Straight sections (number # m and length) Infinite (top-up) < x3.? ASTRID

26 with monochromators 26

27 SEXT BD +Q+S QF 27

28 lattice Betatron amplitude functions [m] versus distance [m] 6 2 combined-function magnets (dipole, quadrupole, sextupole) QF quadrupoles 6 1 sextupoles Dispersion functions [m] versus distance [m] x-y correctors Horizontal Vertical 28

29 Transfer beamline 29

30 ASTRIDs with undulators and transfer beamline 30

31 Some parameters General parameters Energy Dipole field Circumference Current Number of ID s Lattice parameters Straight S dispersion Horizontal tune Vertical tune Horizontal chromaticity Vertical chromaticity Coupling factor SR parameters Energy loss per turn SR power Natural emittance Characteristic energy Damping times RF parameters Damped energy spread RF frequency Harmonic number RF voltage E [GeV] B [T] L [m] I [ma] [m] Q x Q y dq x /d(δp/p) dq y /d(δp/p) U 0 kev/turn] P 0 [kw] ε H [nm] ε c [ev] τ h, τ v, τ s [ms] σ E /E [0/00] h [kv] % ,28.6, ASTRID % ,18.7,

32 3 bumper pulsed-septum injection 32

33 Magnet parameters Name of magnet BD Qf3 Qf2 Sf Type of magnet Defocusing combined-function magnet Quadrupole Quadrupole Sextupole HxV steerer Number of magnets Magnet length [m] Aperture [mm] 44x28 Ø44 Ø44 Ø44 45x45 Good field region [mm] 36x22 Ø36 Ø36 Ø36 35x35 Dipole field [T] Radius of curvature [m] Quadrupole field [T/m) nom nom Sextupole field [T/m 2 ] Nom

34 Closed-orbit correction 12 H/V BPM s and 12 H/V correctors for closed-orbit correction (24/12?) position and angular bumps in SS Quadrupole shunts 34

35 insertion devices Insertion device Present ASTRID undulator New undulator Multipole Wiggler Period length (mm) / 116 Number of periods / 6 Peak magnetic field (T) Gap (mm) / 12 Inner vacuum gap (mm) / 8 K (max) / 21.7 Max. deflection angle (mrad) 28.8 / 19 Max. deflection angle (º) 1.6/1.1 Width after 2 m (mm) ±58 / ±38 Length (mm) / 700 Total power radiated (W) /

36 Influence of ID s Astrid2 vertical betafunction with varios insertion devices (a2 015) Position of insertion device No undulator "Big" Wiggler "Small" Wiggler New undulator Old undulator, 22mm gap Old undulator, 18mm gap

37 Tune shifts from the various insertion devices Insertion device K L_period [m] L [m] N Tune Shift (V) "big" MPW "small" MPW new undulator Old undulator, 22 mm gap Old undulator, 18 mm gap

38 Dynamic aperture Astrid 2 dynamic aperture, 10k turns (5.23, 2.23) y [m] V 7 mm H 14 mm 1,40E-02 1,20E-02 1,00E-02 8,00E-03 6,00E-03 V 20 mmmrad H 50 mmmrad 4,00E-03 2,00E-03 0,00E+00-2,50E-02-2,00E-02-1,50E-02-1,00E-02-5,00E-03 0,00E+00 5,00E-03 1,00E-02 1,50E-02 2,00E-02 2,50E-02 x [m] 38

39 ASTRID fast extraction 1 mrad kick Septum after ¼ turn Septum after ½ turn Septum after 1¼ turn 39

40 ASTRID ¼ turn extraction [m] KICKER position [m] KICKER Beam envelope BUMP (0/30mm) KICK (3.5mr) BUMP+KICK SEPTUM KICKER KICKER SEPTUM 40

41 ASTRID ½ turn extraction [m] KICKER position [m] KICKER Beam envelope BUMP (15/30mm) KICK (2.5mr) BUMP+KICK SEPTUM KICKER KICKER SEPTUM 41

42 ASTRID 1 ¼ turn extraction [m] KICKER position [m] KICKER Beam envelope BUMP (20/10mm) KICK (2.5mr) BUMP+KICK SEPTUM KICKER KICKER SEPTUM 42

43 Transfer beamline 43

44 ASTRID transfer line ASTRID septum Septum 44

45 Other technical aspects Ex-situ bake-out of Arcs 105 MHz RF LLRF analog/digital 5 kw RF power Vertical betatron excitation (as at ASTRID) for large lifetime Gradual transition from ASTRID to minimize dark period 45

46 Time line September 2009: order most accelerator components Beginning 2011 first injection in 2012 First beamline on 2013 All beamlines transferred to 46

47 Future We will be busy over the next 4 years Additional funding for two new beamlines (ID, mono, end-stations) are being prepared We appreciate the always good relations to MAXLAB!! 47

48 Thank you for your attention! Questions and comments? 48

Damping Wigglers in PETRA III

Damping Wigglers in PETRA III WIGGLE2005, Frascati 21-22.2.2005 Winni Decking, DESY-MPY Introduction Damping Wiggler Parameters Nonlinear Dynamics with DW Operational Aspects Summary DESY and its Accelerators