Actividades del grupo de aceleradores del CIEMAT en los grandes aceleradores lineales en proyecto

1. Actividades del grupo de aceleradores del CIEMAT en los grandes aceleradores lineales en proyecto David Carrillo en nombre de la Unidad de Aceleradores

2. Índice • Contribución a CLIC–CTF3 (PETS, quads, kicker) • PETS TBL • Diseño y fabricación • Medidas • Contribución a XFEL • Linac CIEMAT

3. CLIC (Compact Linear Collider)

4. CTF3 (CLIC Test Facility 3)

5. CTF3 Contribution Septa Fast Kicker 16 TBL quad Movers Tail Clipper Kicker 33 Horizontal/Vertical Correctors 4 TBL PETS * In 2004, CIEMAT joined the CTF3 experiment to test the feasibility of CLIC(CERN). Our contribution consists of the delivery of different components for the Combiner Ring and also for the Transfer Lines and the Test Beam Line. In this participation, with an overall budget of around 1,5M€, we had an important industrial contribution.

6. TBL PETS Contribution. PETS (Power Extraction and Transfer Structure) RF design Previous design 30 GHz PETS (4 waveguide extractor) RF optimization Power extracted Final version: 12 GHz PETS (2 waveguide extractor) Electron beam Power extracted • Electric field produced when • The electrons are “decelerated”

7. TBL PETS ContributionGeneral layout Fiducials Cooling pipes WR90 waveguide Copper rods Power extractor Vacuum port Supports

8. TBL PETS ContributionCopper rods • Each PETS was made of eight OFE copper rods (800 mm) • These were the most difficult parts to fabricate: overall tolerance is +/- 0.02 mm and roughness should be better than 0.4 micron • The coupling cell is smaller: two different tools were necessary • Two intermediate thermal treatments for stress relaxation Copper rod

9. TBL PETS ContributionCooling pipes production

10. TBL PETS ContributionWaveguides Waveguides brazed in Spanish company AIMEN

11. TBL PETS Contribution Brazing in Spain • Brazing consists of the joining of metals through the use of heat and a filler metal – one whose melting temperature is above 450°C but below the melting point of the metals being joined • There have been some problems: • Furnace has not view port • It has graphite heating elements • Copper machining (flatness, roughness)

12. TBL PETS Contribution Power extractor. Brazing at CERN Courtesy Serge Mathot, CERN • Copper parts were polished at CERN, because they were not flat enough • Copper parts were cleaned by ultrasonic bath, and at CERN, they were also etched and passivated • Power extractor was successfully brazed at CERN

13. TBL PETS Contribution PETS tank assembly (I)

14. TBL PETS Contribution PETS tank assembly (II)

15. Índice • Contribución a CLIC (PETS, quads, kicker..) • PETS TBL • Diseño y fabricación • Medidas • Contribución a XFEL • Linac CIEMAT

16. TBL PETS Contribution Single rod RF test bench • A special test bench has been designed to do RF measurements on each rod • It consisted of two side blocks put together with a single PETS bar in order to create inside a mode with same properties as decelerating mode • Results agree with 3-D measurements Phase S31 vs position HFSS model E field and probe Mode TE10

17. TBL PETS Contribution Mode launcher • Mode launcher was needed to produce working mode in order to do RF measurements on PETS before final assembly • Two mode launchers were manufactured and measured and they were ok for measuring PETS final assembly HFSS input coupler model Input couplers manufactured

18. TBL PETS Contribution Power extractor test bench Port1 Port2 Port4 Absorbe r Absorbe r Choke Coaxto WR90 Coaxto WR90 Input Coupler Power Extractor Input Coupler Absorbe r Port3

19. TBL PETS Contribution Power extractor measurements S11 Experimental results S11 HFSS Simulation No visible change in S11 when removing wire, or absorber from port 4 Both S21 and S31 are aprox. -3dB at 12 GHz

20. TBL PETS Contribution PETS RF measurement bench • A special test bench was designed to measure the assembly of rods • A coaxial antenna was used to measure the field through the slots between the rods

21. TBL PETS Contribution Dispersion Curve In the worst case a 10% power loss extraction is expected 11944 MHz 50 MHz detuning

22. TBL PETS Contribution Sensitivity Analysis Distance from peak to valley Distance from PETS cell peak to axis In principle frequency looks quite sensitive to the profile flatness and to the distance from peak to valley IncRb Beam axis Radius of curvature Ra R curvature A sensitivity analysis is ongoing to understand the cause of this detuning

23. TBL PETS Contribution TBL Commissioning Status Courtesy Steffen Doebert, CERN RF pulse phase RF power produced Beam current along the line • up to 10 A through PETS • 20 MW max produced at a pulse length of 280 ns • Power production consistent assuming a form factor of 0.9 • PETS series production launched together wit CIEMAT(series of 8)

24. TBL PETS Contribution Courtesy Steffen Doebert, CERN TBL prototype beam line spring 2009 BPM, Quad Mover, Quad, PETS-tank

25. Índice • Contribución a CLIC (PETS, quads, kicker..) • PETS TBL • Diseño y fabricación • Medidas • Contribución a XFEL • Linac CIEMAT

26. XFEL CONTRIBUTION LASER LIGHT SOURCES:XFEL (1) • CIEMAT is collaborating since 2004 in the international project XFEL (X-Ray Free Electron Laser) to be installed in DESY (Hamburg). • It is a Laser Light Pulsed Source of 100ns duration pulses in the band from 0.085 to 6 nm. • It consists of a Superconducting LINAC ( cavities and magnets) up to 20 GeV plus an array of undulators based on permanent magnets. • Our contribution is valued in about 12 M€ and our commitment consist of the delivery of the following systems: • 120 Superconducting Magnets plus their Power Supplies. • 91 Intersections between undulators made from different elements

27. Magnetization Measurements for the Combined Superconducting Magnet for XFEL (2007) Combined Superconducting Magnet for XFEL Installed in the “XFEL String” (2007) XFEL CONTRIBUTION LASER LIGHT SOURCES:XFEL (2) Combined Superconducting Magnet for XFEL (2006) * Within the first contribution, our group has developed a short series of four superconducting combined magnets (one quadrupole + two dipoles) while the remaining 100 magnets will be developed by industry. The design is being reviewed to decrease the magnetization effects.

28. XFEL CONTRIBUTION LASER LIGHT SOURCES:XFEL (3) General Scheme for the XFEL Interseccions • * Within the second contribution, CIEMAT must deliver some main components of the intersections between undulators, as well as its full assembly (optional). These components are: • *The Phase Shifter Magnet (including a magnetic measuring table to measure its field quality) • * The MOVERS for the quadrupoles • * The base structure for the full Intersection

29. XFEL CONTRIBUTION LASER LIGHT SOURCES:XFEL (4) Measurement bench 3D Model by CIEMAT Mover 3D Model by CIEMAT Phase Shifter 3D Model by CIEMAT

30. Índice • Contribución a CLIC (PETS, quads, kicker..) • PETS TBL • Diseño y fabricación • Medidas • Contribución a XFEL • Linac CIEMAT

31. MULTIPURPOSE: THE CIEMAT LINAC CIEMAT is considering to install a multipurpose accelerator to study some of the applications presented in this table. A first analysis has been performed at Bevatech and there an existing proposal based on IH cavities Proposal for a LINAC-CIEMAT based on IH Cavities at room temp.