Status of the SOLEIL project Commissioning from Linac to beamlines

Transcription

1 Status of the SOLEIL project Commissioning from Linac to beamlines On behalf of the commissioning team 2 D01-1-CX1/DT/DTC/absorption Y Axis Title X Axis Title 1

2 Site and Budget at Gif-sur-Yvette 25km south of Paris, France 350 permanent staff 19 Hectares Total budget for period 454 M Investments 248 M Functioning 53 M Salaries 153 M Functioning budget per year starting in 2010: ~ 45 M. CEA and CNRS own 28% and 72% of the Synchrotron Soleil company respectively. 2

3 SOLEIL Characteristics Electron energy: 2.75 GeV Extended spectral range From UV (5 ev) up to hard X-Rays (30 kev) 3 rd generation Many Insertion Device beamlines 21 straight sections available (29% of ring circ.) High brilliance (10 20 ) in the soft X-ray range small emittance and high intensity Best achievable beam position stability 3

4 24 beamlines 24 Beamlines approved by the Council + 1 beamline to be founded 18 on insertion devices and 7 on bending magnets Spectral range equally shared : 50% below 1.3 kev and 50% above Phase 1: 11 beamlines being built =>open to external Users in on insertion devices and 3 on bending magnets + 2 IR Phase 2: 7 beamlines open to external Users in on insertion devices and 2 on bending magnets + 7 beamlines on ID open to external Users in Straight sections still free + 14 bending magnet beamports! 4

5 LINAC and Booster designed for topping-up operation 2.75 GeV BOOSTER 2 super periods Circumference: 157 m 36 Dipoles : 0.67 T / 2.17 m LINAC 100 MeV 3 Hz rep Rate Output charge : 8 nc in 300 ns in multibunch mode (500 ma in SR) 44 Qpoles: 10.3 T/m m Emittance: nm.rad Power supplies cycling at 3 Hz 1.5 nc in 3 pulses (2ns) in 8 bunch mode (90 ma in SR) 5

6 LINAC turn key system provided by THALES: 1st beam on July 2nd 2005 Excellent performances: stability/reproducibility Spec. : (γε at 90 %) γε at 90 %) < 200.mm.mrad Final Acceptance pronounced on November 15th, 2005 Mode Long Pulse Short Pulse (1) Short Pulse (4) Beam Charge 10.6 nc 0.55 nc 2.27 nc Horizontal π mm.mrad Vertical π mm.mrad

7 Booster ring commissioning Tunes kept within ± 0.05 Booster Efficiency ~ % 1 st beam in the Booster at 110 MeV July 23rd, power supplies (Bruker( Bruker) ) ramped at 3 Hz: Tracking ± 0.2 % Beam decelerated down to 140 MeV 7

8 Storage Ring main parameters Energy Circumference RF frequency Harmonic number Betatron tunes (H/V) Natural chromaticities (H/V) Momentum compaction Momentum compaction α 1 / α 2 Radiation loss per turn (with IDs) Damping times Emittance Relative energy spread Natural bunch length (@ 4 MV) Coupling Multibunch mode Expected Beam Lifetime / / x x 10-4 / , 7, x GeV m MHz kev ms nm.rad mm % ma h 8

9 Specificities and innovative aspects High ratio (43 %) of ID straight sections over total 354 m circumference Extreme requirements for beam stability Specific super-conducting cavities (352 MHz) RF power generator: solid state amplifier of 4 x 190 kw (never done) Innovative insertion devices Al chamber vessels with NEG coating (56 % of the circumference) New type of BPM digital electronics: LIBERA module 9

10 Commissioning Milestones in effective weeks 5/14 First turn 6/04 First stored beam 6/04 First beam accumulation: 8.35mA 7/04 100mA achieved 7/10 5 A.h beam dose shutdown 7/11 9/4 (water + holidays) 9/13 First photons to a beamline (DIFFABS) 9/16 200mA 9/21 First photons to a beamline (TEMPO) 9/25 300mA achieved ; 30A.h 9/29 U20 at 5.5 mm gap 9/21 First photons to a beamline (ODE) 10/15 beam lifetime = 100mA in 312 bunches shutdown 10/16 12/01 (21 water circuit cleaning ) 12/12 First photons to a beamline (SAMBA) 12/13 first photons to a beamline (DESIRS) 12/21 75 A.h beam dose 12/21 beam lifetime 100mA in 312 bunches 10

11 Expected obstacles: 10mm inner height ID vacuum vessels since the first day on 10 medium straight sections HU256 U80 11

12 Unexpected obstacles: Bad mounting of some RF Fingers in short straight sections RF finger at 1.5 mm from beam axis! But the beam went nicely through these very small apertures! Problem fixed now (they all have been replaced) 12

13 Measured Closed Orbit With All Correctors switched OFF. (BPM offsets included after BBA) H-plane Rms = 3.1mm Max = 6.4mm V-plane Rms = 0.4mm Max = 1.4mm 13

14 Closed Orbit Correction after the Application of the Beam Based Alignment 56 correctors in each plane and 120 BPMs. H-orbit rms = 68µm max = 225µm rms HCOR 1.1 A 1 A 48 singular values V-orbit rms = 58µm max = 190µm 32 singular values rms VCOR 2.0 A 0.4 A 14

15 Quadrupole Beam Based Alignment Minimize the merit function Statistics of the offsets (first iteration) σ x = 153 µm X mean =132µm σ z = 170 µm Z mean =-150µm 15

16 Storage Ring: magnetic measurements Very careful metrology to reach excellent alignment alignment of the Magnetic measurement bench May 2004-Aug Magnetic measurements of 326 electro-magnets: magnetic axis centering, field properties Rotating coil bench built to reach magnetic centering to ± 25 µm and tilt ±0.1mrad 16

17 Storage Ring: Q-Magnet Q alignment Z (mm) ANS Qpoles (magnetic centres) Altimetry Mar 06 with N3 optical level rms: appr mm : Cell S (m) Before alignment Mar06 After alignment Apr06 Smoothing May06 17

18 β functions at the BPMs after LOCO application: comparison measured and theoretical values H Plan V Plan ~ 5 % differences further tuning needed 18

19 Betatron Coupling from Closest Tune Approach without any skew quadrupole correction Tunes ν min =0.003 Without coupling correction 2 κ 2 with =ν x -ν z -p (no vertical dispersion & single resonance approximation) υmin / = (2 + υ / min Guignard, CERN ) ν x = ν z = , p=8 κ = 0.08 % 19

20 Beam Emittance Measurements Source point in Dipole n # 2 cell # 2 Pinhole H : 25 µm V : 10 µm converter X Visible Visible Optics X optics CCD Measured Vertical Projection Camera with good linearity Image analysis by Gaussian fit and Deconvolutions Error bar on emittances : β value at source point : +/- 5 % possible beta beat Instrument parameters : a few 10-3 on H, a few 10-2 on V Vertical profile distortion remains to be understood Measured Horizontal Projection ε x = 3.9 nm.rad ± 0.25 ε z = 11 pm.rad ± 2 κ 0.3% (natural coupling) Design: ε x = GeV 20

21 Tune shifts with energy Good Agreement with model 0,5 0,45 0,4 nux measured nux calculated nuz measured nuz calculated DP/P > 0: loss on half Integer resonance (0.02 wide) DP/P < 0: loss on longitudinal beam dynamics α 1 = α 2 = ,35 0,3 0,25 0,2 0,15 0,1 0, DP/P (%) f RF f RF ) p/p (%) ξx = +3 ξz = +3 f rf = 8 khz 21

22 Vertical Acceptance Measured Ixτ vs. vertical position of scrapers (up and down) DOWN scraper UP scraper 200 ma UP scraper 11 ma Scraper is located in a long Straight section Measured ~ +/- 5mm. I x tau (ma x h) Simulations parameters: κ = 1% Zmin = ±5mm in medium straight sections 100 z (mm) Simulated Dynamic Aperture (long straight section) 22

23 Horizontal Acceptance Measured: - 15mm Deduced from turn by turn data kicking the beam with one injection kicker Confirmed by inserting the scrapers at septum equivalent position and kicking the beam with the same kicker Beam loss: Septum Position (-15mm) 23

24 Vibration measurements on SR girders Experimental Modal Analysis 1 st mode on quadrupole girder (transversal flexion) at 45 Hz! (design value 40 Hz) nd mode on quadrupole girder (vertical flexion) at 56 Hz

25 Typical noise spectrum BPM + Beam: 0 to 500 Hz Girder 47 Hz 50 Hz 47 Hz 50 Hz Noise < 2 microns Noise < 2 microns 25

26 Insertion devices commissioning HU m 2x HU80 2x U20 2x HU256 26

27 HU80-TEMPO Commissioning: Feed-Forward Forward Correction Test Horizontal BPM Data Minimal Gap (15.5 mm) Helical Mode (Phase = 20 mm) Vertical BPM Data 27

28 Multibunch Instabilities Mixture of resistive-wall (RW) and ion induced instabilities in both vertical & horizontal planes. No instability observed in the longitudinal plane. Instability threshold [ma] Signature of ions 3/4 filling 2/4 filling uniform filling Simulation 0 0,00 0,10 0,20 0,30 0,40 Instability threshold [ma] ions + RW 20 3/4 filling 10 ions uniform filling Vertical normalised chromaticity Horizontal normalised chromaticity - Behaviour of ion-induced instability depends much on the beam filling pattern. - Vertical threshold at low chromaticity in rather good agreement with prediction. - Horizontal threshold much lower than expected.(90 ma) - Single bunch current thresholds seem to be a factor 2 smaller than simulation 28

29 Dedicated superconducting RF cavities 0.1 phase stability 6 % RF acceptance No RF trip 1 st cryomodule will enable alone operation up to 300 ma. A 2 nd cryomodule is being built by ACCEL for operation at 500 ma (early 2008) 29

30 Storage Ring RF plant 4 x 190 kw power amplifiers Full Cost (with PS and WG distribution) Booster : 200 k for 40 kw => 5 / W Stor. Ring : 3 M for 750 kw => 4 / W Modularity = You just pay for the Watts you actually need MHz Gain = 52 db Overall Efficiency (PS,..) ~50% No RF trip even if transistor fails 30

31 Storage Ring Vacuum system Vacuum system for one typical cell Together with the Straight Section chambers, ~200 m of NEG coated Al chamber (56% of the ring) SOLEIL = first SR Machine with extensive use of NEG coated AL vessels 31

32 Vacuum Conditioning is well progressing 1,E-08 Non NEG coated stainless steel vacuum vessels 1,E-09 Pav / I (mbar/ma) 1,E-10 NEG coated vacuum vessels y = 2E-10x -0,602 y = 4E-10x -0,6021 Dec. 06 shutdown Crotch change at dipole 1 Beam lifetime : ma 1,E-11 0,10 1,00 10,00 100,00 Integrated Beam Dose (A.h) 32

33 Beam time by the end of 2006 Maximum current: 300 ma in 312/416 buckets Total beam integrated dose: 75 A.h 5% 11% Failures: water, PS, Beam time 84% Start-up, injection, tests, July / December 2006: 1400 hours 33

34 Time structure mode 20 ma in 1 bunch 80 ma in 8 bunches 148ns between 2 successive bunches 34

35 TANGO control system SOLEIL first facility using TANGO at full scale Collaboration ESRF/ELETTRA/SOLEIL/ALBA Easy and efficient tools to control any equipment Control of all equipments from the control room, data archiving Supervision done using GlobalSCREEN applications All hardware installed (Crate with CPCI and boards, PLC s..) Machine commissioning: Matlab applications (Matlab Middle Layer Toolkit, Accelerator Toolbox,...) 35

36 Beamline commissioning TEMPO 09/20/06 ~ 8 mm ODE 10/13/06 ~ 80 mm DIFFABS 09/13/06 SAMBA 12/13/06 DESIRS 12/14/06 36

37 Schedule for the first beamlines in 2007 DESIRS CRISTAL SAMBA TEMPO ODE AILES installation SWING commissioning expert users CASSIOPEE regular users PROXIMA1 installation commissioning expert users regular users DIFFABS SMIS 1/04/07 1/07/07 1/10/07 1/04/07 1/07/07 1/10/07 37

38 Planned Operation in runs of 3 or 4 weeks 3264 h for beamlines h for the machine. janv 2007 févr 2007 mars 2007 avr 2007 mai 2007 juin 2007 juil 2007 août 2007 sept 2007 oct 2007 nov 2007 déc 2007 janv 2008 lun jeu 01 l l l jeu dim mar 01 l l l ven 01 l l l dim 01 mmm mer sam 01 mmm lun jeu 01 l l l sam 01 l l l mar mar ven 02 l l l ven 02 mmm lun mer 02 l l l sam 02 l l l lun 02 mmm jeu dim 02 mmm mar ven 02 l l l dim 02 l l l mer mer sam 03 l l l sam 03 mmm mar jeu 03 l l l dim 03 mmm mar 03 l l l ven lun 03 mmm mer sam 03 l l l lun 03 l l l jeu jeu dim 04 mmm dim 04 mmm mer ven 04 l l l lun 04 mmm mer 04 l l l sam mar 04 l l l jeu dim 04 l l l mar 04 mmm ven ven lun 05 mmm lun 05 mmm jeu sam 05 l l l mar 05 l l l jeu 05 l l l dim mer 05 l l l ven lun 05 l l l mer 05 l l l sam sam mar 06 mmm mar 06 l l l ven dim 06 l l l mer 06 l l l ven 06 l l l lun jeu 06 l l l sam mar 06 mmm jeu 06 l l l dim dim mer 07 l l l mer 07 l l l sam lun 07 mmm jeu 07 l l l sam 07 l l l mar ven 07 l l l dim mer 07 l l l ven 07 l l l lun lun jeu 08 l l l jeu 08 l l l dim mar 08 mmm ven 08 l l l dim 08 mmm mer sam 08 l l l lun jeu 08 l l l sam 08 l l l mar mar ven 09 l l l ven 09 l l l lun mer 09 l l l sam 09 l l l lun 09 mmm jeu dim 09 l l l mar ven 09 l l l dim 09 l l l mer mer sam 10 l l l sam 10 l l l mar jeu 10 l l l dim 10 mmm mar 10 l l l ven lun 10 l l l mer sam 10 l l l lun 10 l l l jeu jeu dim 11 l l l dim 11 mmm mer ven 11 l l l lun 11 mmm mer 11 l l l sam mar 11 mmm jeu dim 11 l l l mar 11 mmm ven ven lun 12 mmm lun 12 mmm jeu sam 12 l l l mar 12 l l l jeu 12 l l l dim mer 12 l l l ven 12 mmm lun mer 12 l l l sam sam mar 13 mmm mar 13 l l l ven dim 13 l l l mer 13 l l l ven 13 l l l lun jeu 13 l l l sam 13 mmm mar jeu 13 l l l dim dim mer mer 14 l l l sam lun jeu 14 l l l sam 14 l l l mar ven 14 l l l dim 14 mmm mer ven 14 l l l lun lun jeu jeu 15 l l l dim mar ven 15 l l l dim 15 mmm mer sam 15 l l l lun 15 mmm jeu sam 15 l l l mar mar ven ven 16 l l l lun mer sam 16 l l l lun 16 mmm jeu dim 16 l l l mar 16 l l l ven dim 16 l l l mer mer sam sam 17 l l l mar jeu dim 17 l l l mar 17 l l l ven lun 17 l l l mer 17 l l l sam lun 17 l l l jeu jeu dim dim 18 mmm mer ven lun mer 18 l l l sam mar 18 mmm jeu 18 l l l dim mar ven ven 19 mmm lun lun 19 mmm jeu sam mar jeu 19 l l l dim mer 19 l l l ven 19 l l l lun mer sam sam 20 mmm mar mar 20 mmm ven 20 mmm dim mer ven 20 l l l lun jeu 20 l l l sam 20 l l l mar jeu dim dim 21 mmm mer mer 21 l l l sam 21 mmm lun jeu sam mar ven 21 l l l dim 21 l l l mer ven lun lun 22 mmm jeu jeu 22 l l l dim 22 mmm mar ven dim mer sam 22 l l l lun 22 l l l jeu sam mar mar 23 mmm ven ven 23 l l l lun 23 mmm mer sam lun jeu dim 23 l l l mar 23 mmm ven 23 mmm dim mer mer 24 l l l sam sam 24 l l l mar 24 l l l jeu dim mar ven lun mer 24 l l l sam 24 mmm lun jeu jeu 25 l l l dim dim 25 l l l mer 25 l l l ven 25 mmm lun mer sam mar jeu 25 l l l dim 25 mmm mar ven ven 26 l l l lun lun 26 mmm jeu 26 l l l sam 26 mmm mar jeu dim mer ven 26 l l l lun 26 mmm mer sam sam 27 l l l mar mar 27 mmm ven 27 l l l dim 27 mmm mer ven lun jeu sam 27 l l l mar 27 l l l jeu dim dim 28 mmm mer mer sam 28 l l l lun 28 mmm jeu sam mar ven dim 28 l l l mer 28 l l l ven lun lun 29 mmm jeu dim 29 mmm mar 29 l l l ven 29 mmm dim mer sam lun 29 l l l jeu 29 l l l sam mar mar 30 l l l ven lun 30 mmm mer 30 l l l sam 30 mmm lun jeu dim mar 30 mmm ven 30 l l l dim mer mer 31 l l l sam jeu 31 l l l mar ven 31 mmm mer 31 l l l lun jeu

39 Milestones in 2007 Beam stability SOFB/ FOFB/ multibunch transverse feedbacks Feedforward for IDs XBPM commissioning IDs Construction of 7 IDs (and installation & commissioning) Preparation for top-up operation Single bunch and 8 bunches operation Beam instabilities and high current operation Instabilities threshold Transverse feedback Nonlinear dynamics characterization Delivery of 2nd cryomodule for 500mA operation 39

40 The first phase of the Machine commissioning has enabled to demonstrate that the expected high performances are or will be met. Acknowledgements Operator team Magnetism and insertion group RF, Linac, Diagnostics groups Vacuum group Alignment group Mechanical and Engineering group Electronics and Computer groups Infrastructure group Safety group Beam Lines 40