TTF2 (TESLA Test Facility, Phase 2) VUV FEL (Vacuum-Ultraviolet … · 2004. 11. 5. · Kollimator Vakuum [email protected] Diagnostik [email protected], Bunch compressor

DESY MAC Meeting 09. Nov. 041


TTF2 (TESLA Test Facility, Phase 2) VUV FEL (Vacuum-Ultraviolet Free-Electron Laser)

Overview and Status

Jörg Rossbach


BC 3 BC 2

260 m

Overview

Injector 3Injector 3LOLALOLA


TTF External Contributions to Installation and Operation

MBIGun Laser

SLACTransverse deflecting cavityLOLA

INFN FrascatiOTR Diagnostics

CE SaclayFreq.TunerBPMs

FNALRF Gun / CryogenicsRF Modulators

INFN MilanoCathodesAccel.Modules

Installation

AyvazyanSimrock

Warsaw Univ.LLRF

Schreiber

Honkavaara

SchlarbKlose

LangeNölle / Baboi

Schreiber

DESY Coord.

MBIGun Laser

SLACTransverse deflecting cavityLOLA

INFN FrascatiOTR Diagnostics

CE SaclayFreq.TunerBPMs / HOM Studies

INFN MilanoCathodes

Operation

RehlichITEPMoscow Univ.

Ctrls

ChorobaProtvinoRF

AyvazyanRehlich

YerPhiCtrls

additional manpower


2 2 HelmholtzHelmholtz “Virtual Research Centers” :“Virtual Research Centers” :

1.1. Electron gunsElectron guns

2.2. Advanced beam diagnostics Advanced beam diagnostics

New PartnersNew Partners

EU Infrastructure EU Infrastructure ProgrammeProgramme::

1.1. EUROFELEUROFEL

2.2. CARECARE

3.3. Synchrotron Radiation I3Synchrotron Radiation I3

Several more under progress …Several more under progress …


VUV FEL beam parameters

40 mm keVLong. emittance σE × σl

2500 APeak current

150 fsBunch length (rms)

65 µmBeam size in undulator

2 mrad mmNorm. emittance at undulator entrance

1.2 mrad mmNormalized emittance from injector (1 nC)

VUV FEL@ 6 nm (1 GeV)


TTF2 Time Structure

• Repetition rate

• Macro-pulse

• Bunch

• Slice

t

100msDuty cycle ~ 0.8%

within pulse trainmax. 9 mA

t

I 800µs macro-pulseIpeak~ 2.5 kA

It

I1.0-0.111µs bunch spacing

1 nC100 fs

2-5 kA

~ psSlice ~ e.g. 10 fs

Without3rd harm. cav.


The TTF with its VUV FEL is The TTF with its VUV FEL is

–– a new type of FEL radiation user facility a new type of FEL radiation user facility –– an FEL research machinean FEL research machine

–– a testa test--bed for bed for s.cs.c. . linaclinac technologytechnology

–– a prototype for the European XFELa prototype for the European XFEL

Consequence:Consequence:TTF needs several stages for electron beam manipulation and fullTTF needs several stages for electron beam manipulation and full control of control of beam parameters during all of these stages.beam parameters during all of these stages.

flexible optics lattice, thusflexible optics lattice, thus many many quadrupolequadrupole magnets and power suppliesmagnets and power supplies

lots of beam diagnosticslots of beam diagnostics

high density of special componentshigh density of special components

VUV FEL is not suited to estimate XFEL or ILC VUV FEL is not suited to estimate XFEL or ILC costs&effortscosts&efforts just by scaling length or beam energy!just by scaling length or beam energy!

Machine characteristics


Priorities and Milestones

Due to unexpected financial restrictions some major cost drivingDue to unexpected financial restrictions some major cost drivingcomponents needed to be delayed.components needed to be delayed.

necessary to renecessary to re--define priorities. Decision: delay power supplies define priorities. Decision: delay power supplies cablingcablinglong bunch train issues long bunch train issues

Milestones:Milestones:

1: Injector commissioning up to ACC21: Injector commissioning up to ACC2

2: Complete vacuum system2: Complete vacuum system

3: FEL commissioning at ~30nm wavelength with “single” bunch 3: FEL commissioning at ~30nm wavelength with “single” bunch

4: Full bunch train operation4: Full bunch train operation


TTF2 Schedule of the last year

1’2004end vacuum installationend vacuum installation

installation of remaining componentsinstallation of remaining components

end shutdownend shutdown

•••••••••••••••• start vacuum installationstart vacuum installation

commissioning complete accelerator commissioning complete accelerator now

9’2003

survey of magnetssurvey of magnets

6’2004commissioning injector commissioning injector

survey of components and final alignmentsurvey of components and final alignment

incl. module installation & all magnetsincl. module installation & all magnets

incl. module processingincl. module processing((diagnostics,cables,container,PS,interlock,photondiagnostics,cables,container,PS,interlock,photon beamlinebeamline))

installation of injectorinstallation of injectorinstallation of guninstallation of gun

11’2004


Progress since June 2003Progress since June 2003::•• Machine completely installed, vacuum closed Machine completely installed, vacuum closed

•• Injector commissioned up to ACC2; Injector commissioned up to ACC2; emittanceemittance ok for 30 nmok for 30 nm

•• Commissioning of entire machine started 1. Sept. 2004Commissioning of entire machine started 1. Sept. 2004

•• Accumulated delay of ~ 3 months w.r.t. June 2003Accumulated delay of ~ 3 months w.r.t. June 2003

Overview and Status

TTF2 installation schedule contained ~ 450 topicsTTF2 installation schedule contained ~ 450 topicsTalk by M. Talk by M. KKöörferrfer


InjectorInjector

General concept:

1.1. Full performance test of gun components at PITZ/Full performance test of gun components at PITZ/ZeuthenZeuthen

2.2. Installation at TTFInstallation at TTF

1

2

3

12

3

0

0.5

1

y,mmx,mm

Laser spoton cathode:

σx = 0.51± 0.02 mm

σy = 0.62± 0.02 mm

Present TTF gun:Present TTF gun:

Test at PITZ: ε = 1.7 π mm mrad

downstream BC2: ε ≈ 3 π mm mrad

First First emittanceemittance measurement (measurement (vertvert.) .) at ~100 at ~100 MeVMeV, no compression, no compression

Compression by BC2 Compression by BC2 clearycleary observedobservedNo quantitative measurement yetNo quantitative measurement yet


InjectorInjector

Improvement plans:1.1. Transversely homogenous laser spot on cathodeTransversely homogenous laser spot on cathode2.2. Longitudinal flat top profileLongitudinal flat top profile3.3. Increase electric field on cathode Increase electric field on cathode

1

2

3

12

3

0

0.5

1

y,mmx,mm

σx = 0.57± 0.02 mm

σy = 0.58± 0.02 mm

First test at PITZ:First test at PITZ:

εx = 1.9 π mm mradεy = 1.3 π mm mrad

Talk by M. Talk by M. KrassilnikovKrassilnikov


Tunnel layout: Concept and Experience

Intention:Intention: tunnel design tunnel design prototyping TESLA tunnelprototyping TESLA tunnel

Experience:+ cabling is less time consuming+ cabling is less time consuming+ short cable length+ short cable length-- bad cable tray access below walkwaybad cable tray access below walkway-- time consuming cabling beside the containerstime consuming cabling beside the containers--For TTF2: container more expensive than standard racksFor TTF2: container more expensive than standard racks

32 Container32 Container

Conclusion for TESLA & XFEL:Conclusion for TESLA & XFEL: different tunnel layout; different tunnel layout; Conclusion for ILC:Conclusion for ILC: tbdtbd; experience and numbers available; experience and numbers available


Mechanical Design Tools: Full 3D representation


Vacuum

BC 3 BC 2

All vacuum chambers particle free installed All vacuum chambers particle free installed using local clean roomsusing local clean rooms


Electron beam diagnostics

Charge MonitorsCharge MonitorsToroidsToroids: available: available ++

ScreensScreensOTR’sOTR’s installed & commissionedinstalled & commissioned ++

BPMsBPMsall all BPMsBPMs installed and cabledinstalled and cabled ++but only 20 Read out Electronics availablebut only 20 Read out Electronics availableProblem: delivery of milled Problem: delivery of milled rfrf--housing and availability of housing and availability of rfrf –– connectorsconnectors ----

BPMsBPMs at „Strategic Positions“:at „Strategic Positions“: ------ Injector: Full InstrumentationInjector: Full Instrumentation-- BC3: 2 BC3: 2 BPMsBPMs UpUp-- and Downstreamand Downstream-- LOLA: 2 LOLA: 2 BPMsBPMs-- Bypass Line: 2 Bypass Line: 2 BPMsBPMs-- Dump Line: 1 BPMDump Line: 1 BPM

... and much more beam diagnostics... and much more beam diagnostics

talk by Dirk Noelletalk by Dirk NoelleNew Generation of BPM ElectronicsNew Generation of BPM Electronicsavailable by End of 2004available by End of 2004


SchedulesSchedules

Task Milestone Milestone(as of 19. 8. 2003)

Commissioning of accelerating modules ACC 3,4,5 incl.

proof of max. gradient

Modules commissioned

1.9.2003

Vacuum system entire machine Vacuum closed xx. 1. 2004

Commissioning injectorup to ACC2incl. commissioning modules

ACC1 and ACC2

First beam up to ACC2

15. 3. 2004

Installation of remaining components

all installations completed

14. 5. 2004

Commissioning entire machine,except for collimator and undulator

First beam through bypass into dump

14. 6. 2004

Commissioning of collimator and undulator beamline

First beam through undulator into dump

Commissioning photon diagnostics in the tunnel

Beam intensity and spectrum of spontaneous radiation

1. 8. 2004

Milestone(rev. Jan 2004)

Milestone(9. 11. 2004)

15. 9.200315.9.2003

12. 2. 2004 mid of Febr. 2004

21. 4. 2004 29. 4. 2004

26. 8. 2004 1. 9. 2004 (except PS & BPMs)

16. 9. 2004 end of 10.2004

30. 9. 2004 end of 11. 2004

end of end of 12. 2004 12. 2004


Major reasons for delay w.r.t. schedule of August 2003:Major reasons for delay w.r.t. schedule of August 2003:

Magnetic shielding of ACC1 cavities reMagnetic shielding of ACC1 cavities re--fabricated 2 times fabricated 2 times 4 weeks4 weeks

More time needed for installation beyond vacuum (e.g. cabling , More time needed for installation beyond vacuum (e.g. cabling , container),container),

partially due to conflicts with HERA priority partially due to conflicts with HERA priority 4 weeks4 weeks

Severe delay of Severe delay of PSsPSs: late order due to financial restrictions + company went : late order due to financial restrictions + company went bankrupt bankrupt no beam through bypass before end of Oct. 04 no beam through bypass before end of Oct. 04 4 weeks4 weeks

SchedulesSchedules


Allocation of responsibilities:Allocation of responsibilities:

Hardware work packages Hardware work packages

(almost unchanged since 2001):(almost unchanged since 2001):

Zuständigkeiten TTF2Zuständigkeiten TTF2

KryogenikKryogenik [email protected]@desy.de,,

Magnete Magnete [email protected]@desy.de,,

Umbau, Einbau, Montage Umbau, Einbau, Montage [email protected]@desy.de,,

KollimatorKollimator allg. allg. [email protected]@desy.de

KollimatorKollimator Vakuum Vakuum [email protected]@desy.de

Diagnostik Diagnostik [email protected]@desy.de,,

Bunch compressor 3 Bunch compressor 3 allgallg. . [email protected]@desy.de

Bunch compressor 3 Bunch compressor 3 VakuumVakuum [email protected]@desy.de

ZwischenZwischen--und und ErsatzbeamlErsatzbeaml. . [email protected]@desy.de

Bypass Bypass [email protected]@ifh.de,,

UndulatorUndulator [email protected]@desy.de,,

Vermessung Vermessung [email protected]@desy.de,,

UebersichtszeichnungenUebersichtszeichnungen [email protected]@desy.de,,

Spektrometer+DumpSpektrometer+Dump [email protected]@desy.de,,

Injektor III allg. Injektor III allg. [email protected]@desy.de,,

Injektor III Vakuum Injektor III Vakuum [email protected]@desy.de

RF RF gungun + + laserlaser [email protected]@desy.de

TESLA Module TESLA Module berndbernd..petersenpetersen@@desydesy.de,.de,

Undul.kammerUndul.kammer + + ZwischenstZwischenst. . [email protected]@desy.de

Kontrollen Kontrollen [email protected]@desy.de

Wasser und Strom Wasser und Strom [email protected]@desy.de

RF Versorgung RF Versorgung [email protected]@desy.de

Feedback Feedback [email protected]@desy.de,,

Cavities Cavities [email protected]@desy.de

KopplerKoppler [email protected]@desy.de

MagnetMagnet--NetzgerNetzgeräätete [email protected]@desy.de

KoordinationKoordination VakuumVakuum [email protected]@desy.de

KabelKabel [email protected]@desy.de

GestelleGestelle [email protected]@desy.de

PersonenPersonen--InterlockInterlock [email protected]@desy.de

TechnischesTechnisches InterlockInterlock [email protected]@desy.de

PhotonenPhotonen--DiagnoseDiagnose [email protected]@desy.de


DESY technical/administrative groups Groups fromTESLA CollaborationNew International

Collaborators

TESLACollaboration Board

DESY TTF / VUV-FEL Project GroupChair: Project leader FEL technology J. RossbachCo-Chair: Project leader LINAC technology H. Weise

Project leader photons J. Feldhaus

Members: - people responsible for the individual work packages- members of the Coordination Board

DESY Directorate

DESY TTF / VUV-FEL Coordination BoardChair: M Division Leader D. TrinesCo-Chair: FS Division Leader J. Schneider

Members:• Project leader FEL technology J. Rossbach• Project leader LINAC technology H. Weise• Project leader photons J. Feldhaus• FEL concepts M. Yurkov• TESLA TEST Facility R&D coordinator C. Pagani• Representative of V3 (PoF related issues) U. Wolframm

TTF / VUV-FEL Organigramm


TTF / VUV-FEL Commissioning

Gun OperationGun Operationllrfllrf (FSM)(FSM) AyvazyanAyvazyanllrfllrf (closed loop)(closed loop) KotthausKotthausphase stability laser / RF phase stability laser / RF SimrockSimrockwater regulation; water regulation; rfrf tune gun tune gun CarneiroCarneirotechnical interlocktechnical interlock SchreiberSchreibergun dark current meas. gun dark current meas. HanHanlaser beam linelaser beam line KloseKloselaserlaser SchreiberSchreiberlaser serverlaser server PetrosyanPetrosyanlaser controlslaser controls RehlichRehlichstreak camera laserstreak camera laser SchreiberSchreibercathode productioncathode production SertoreSertoreFaraday cupsFaraday cups CarneiroCarneiro / / NölleNölletoroidstoroids NölleNölleBPMBPM NölleNöllecollimatorcollimator FlöttmannFlöttmannphase scanphase scan SertoreSertoreenergy, energy spread energy, energy spread SchlarbSchlarbbeam based alignmentbeam based alignment KrassilnikovKrassilnikovbucking coil fieldbucking coil field FlöttmannFlöttmannenvelope matchingenvelope matching FlöttmannFlöttmannstudy effect of laser mirror study effect of laser mirror MiltchevMiltchevwakefieldwakefield effectseffects KimKimquantum efficiency quantum efficiency SchreiberSchreiberphase charge studies phase charge studies SertoreSertore

TTF TTF LinacLinac ACC1 ACC1 –– ACC5ACC5llrfllrf AyvazyanAyvazyanphase calibrationphase calibration AyvazyanAyvazyansetset--up nominal opticsup nominal optics CastroCastromagnetsmagnets CastroCastroOTR screensOTR screens HonkavaaraHonkavaaratoroidstoroids NölleNölleBPMsBPMs NölleNöllewire scannerswire scanners WernerWernerbeam loss detectionbeam loss detection PugachovPugachovdark current transmissiondark current transmission FlöttmannFlöttmannspot size and shapespot size and shapeHonkavaaraHonkavaaracheck envelope matching (check envelope matching (injinj.).) FlöttmannFlöttmannemittanceemittance measurement with screensmeasurement with screens HonkavaaraHonkavaarabunch compressor 2bunch compressor 2 KimKimbeam with compressionbeam with compression LimbergLimbergbunch length monitoring (bunch length monitoring (pyropyro)) SchlarbSchlarbmeasurement beam energymeasurement beam energy CastroCastroenergy spreadenergy spread SchlarbSchlarbcompensate dispersioncompensate dispersion GolubevaGolubevastreak camera (TOSY)streak camera (TOSY) GrimmGrimmIR interferometerIR interferometer GrimmGrimmvelocity bunchingvelocity bunching CarneiroCarneirotimetime--ofof--flight (TOF)flight (TOF) KolleweKollewemeasure phase stabilitymeasure phase stability SimrockSimrockfinal state machine LLRFfinal state machine LLRF BrandtBrandtestablish golden orbitestablish golden orbit CastroCastromodule operationmodule operation KostinKostinHOM studiesHOM studies BaboiBaboi

Electron Beam Downstream of Electron Beam Downstream of LinacLinacACC7 section:ACC7 section:

LOLALOLA Ross / KloseRoss / KloseLOLA KickerLOLA Kicker SchlarbSchlarb / Obier/ Obierelectroelectro--optical sampling (EOS)optical sampling (EOS) SteffenSteffentiming meas. By EOS (TEO)timing meas. By EOS (TEO) SchlarbSchlarbbunch compress. bunch compress. Meas.byMeas.by CDRCDR SchlarbSchlarbdtodto. By IR interferometer. By IR interferometer GrimmGrimm

collimatorcollimator KörferKörferorbit feedbackorbit feedback BalewskiBalewskiestablish bypass operationestablish bypass operation CastroCastrobeam diagnostics bypassbeam diagnostics bypass NölleNölleundulatorundulator::

beam losses in beam losses in undulatorundulator KörferKörfer / / PugatchovPugatchovelectron orbit / beam based electron orbit / beam based alignmalignm.. FaatzFaatzwire scannerswire scanners SachwitzSachwitz

electron spectrometer / beam dumpelectron spectrometer / beam dump SchmitzSchmitz

Photon Beam DiagnosticsPhoton Beam Diagnosticsintensity and spatial distributionintensity and spatial distribution

MCP detectorsMCP detectors YurkovYurkovHASYLAB systemsHASYLAB systems TreuschTreusch

spectral distributionspectral distribution TiedkeTiedkedipole radiation, timing w/ respect dipole radiation, timing w/ respect

to pumpto pump--probe laserprobe laser PlönjesPlönjesFEL photon beam transferFEL photon beam transfer TiedkeTiedke

VUV FEL responsibilities for commissioning proceduresVUV FEL responsibilities for commissioning procedures(13(13--AugustAugust--2004)2004)


•• Machine completely installed, vacuum closed Machine completely installed, vacuum closed

•• Injector commissioned up to ACC2; Injector commissioned up to ACC2; emittanceemittance okok

•• Commissioning of entire machine started 1. Sept. 2004Commissioning of entire machine started 1. Sept. 2004

•• Electron beam through bypass on beam dumpElectron beam through bypass on beam dump

Summary

Documents

TTF2 (TESLA Test Facility, Phase 2) VUV FEL (Vacuum-Ultraviolet … · 2004. 11. 5. · Kollimator Vakuum [email protected] Diagnostik [email protected], Bunch compressor