1. EURISOL CB MEETING – PSI – 15 JUNE 2006 Sébastien Bousson IPN Orsay – Accelerator Division TASK 8 STATUS REPORT INFN – Legnaro IPN Orsay

2. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 2 - Solid state RF amplifier development @ Legnaro

3. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 3 - Solid state amplifier development 352 MHz, 5 kW Amplifier Further measurement sessions have been done in order to characterize it and find reliable working conditions. 2  10 kW prototypes The design is nearly complete and the construction has started

4. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 4 - At present only 2 types are fitting our requirements: Semelab’s D1029 and Polyfet’s LR301. Semelab’s type has been used for previous 2.5 kW and 5 kW prototypes. The maximum target power for continuous operation must be reduced to about 80% for a stable long working (while 100% can be reached for short periods). Polyfet LR301 type showed many failures during tests. A new version of D1029 (named DMD1029) has been produced by Semelab, with better characteristics expected (higher gain). This new module is undergoing tests at Legnaro.. Solid state amplifier development

5. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 5 - naked rack + rf modules rf modules + power supplies Solid state amplifier development : the 10 kW unit

6. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 6 - rf modules + power supplies + power combiner rf modules + power supplies + power combiner +cables Solid state amplifier development : the 10 kW unit

7. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 7 - top view side view front view Naked rack assembled Solid state amplifier development : the 10 kW unit

8. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 8 - Splitters and combiners are either being ordered or under construction at LNL Two-way low power splitter Eight-way low power splitter Four-way high power combiner 2.5 kW power combiner Solid state amplifier development : the 10 kW unit

9. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 9 - Half Wave Resonator development @ Legnaro

10. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 10 - low- vs. high-  : main differences “real-estate” length 232 vs. 276 mm top flange titanium vs st. steel welded vs. indium seal Tuning cup 70 vs. 90 mm Inner conductor flattened vs. cylindrical Holding bars distance 264 vs. 308 mm E a : 5 vs. 6 MV/m E p : 31 vs. 23 MV/m Half Wave Resonator development @ Legnaro

11. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 11 -  =0.17 –The construction was completed –First test at 4 K has just been performed @ Legnaro –Performances still under analysis, but very promising results were obtained.  =0.31 –A new test after HPR hopefully before summer Half Wave Resonator development @ Legnaro

12. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 12 - Cold tuning system for Half Wave Resonator HWR tuner design D. Zenere, INFN-LNL HWRs are rather stiff: fast tuning is probably not required (to be tested) The HWR tuner design is ismilar to the LNL QWR one Goals: 2 Hz resolution, 200 kHz range Status : Detailed study is now achieved Construction is ready to start

13. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 13 - Thickness = 1.25 mm  = 0.17  = 80 mm  = 0.31  = 100 mm NIOBIUM TUNING CUP The tuning plate is cooled by thermal conduction through the 1.25 mm thick Nb plate Tuning is obtained by plate deformation All forces are within the tuning cup structure: no deformation is expected elsewhere in the cavity Cold tuning system for Half Wave Resonator

14. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 14 - Lever Adjustable joint lever Holder Screw-nut system Screw-nut Driving shaft Fixed support Holder Cold tuning system for Half Wave Resonator

15. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 15 - The high beta HWR section is planned to be similar to the PIAVE linac The design of the cryostat is conceptually similar to the PIAVE one Main difference: the size of coupler lines The rf power lines will be designed after the EURISOL rf coupler Half Wave Resonator cryostat study @ Legnaro

16. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 16 - e Spoke cavity development @ IPN Orsay

17. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 17 - Spoke cavity development @ IPN Orsay Stainless Steel helium tank New test capabilities:  RF tests in an « accelerator-type » configuration inside our small- scale horizontal cryostat  Test of different tuning systems (by deformation or with piezo- electric actuators)  Coupling by the RF ports

18. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 18 - Spoke cavity development @ IPN Orsay A new RF test @ 4.2 K has started yesterday ▪ First test with the helium tank ▪ Another heavy chemestry performed (100 µm removed) => Could improve the cavity performances as compared to the previous test The vertical cryostat was modified in order to be able to test cavities equiped with an helium. ▪ Modification achieved in february 2006

19. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 19 - Cold Tuning System (CTS)  « SOLEIL-type » system: adaptation of the CTS developed for the 700 MHz elliptical cavities (slow compensation of the frequency shifts)  2 nd option with piezo (under study): action on the cavity flange or directly on the cavity body (fast compensation) Planning  Design achieved in April 2006  Fabrication has started in June  Delivery expected in mid august  Mounting and first test at warm temperature in Sept. Spoke cavity development @ IPN Orsay

20. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 20 - IPN Orsay : Power coupler design for spoke & HWR Based on a disk geometry Designed for 20 kW CW Large bandwith 56 mm diameter Fabrication for 2 prototypes has started Delivery in november 2006 Adaptation to HWR designed and is OK

21. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 21 - Spoke cavity development @ IPN Orsay 1.5 m Small-scale horizontal cryostat development ▪ Study achieved ▪ Mechanical modification achieved. Leak test OK ▪ Cold box under fabrication ▪ Will be ready for test in november 2006

22. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 22 - Small scale horizontal cryostat Valves box RF coupler Heat exchanger

23. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 23 - Spoke cavity development @ IPN Orsay  Multi-gap spoke development (preliminary)  A preliminary RF design for beta 0.49 exists and an adaptation to the optimum beta for the Eurisol linac has started

24. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 24 - INFRASTRUCTURE DEVELOPMENT on the IPN Orsay site (SUPRATECH)

25. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 25 - 4 main developments on the IPN orsay site SUPRATECH on the IPN orsay site High power RF sources ● 350 MHz (for EURISOL): 10 kW unit (eventually 2) (solid state technology) ● 700 MHz (for EUROTRANS): 80 kW unit (eventually 2) (I.O.T. technology) A clean room for cryomodule assembly ● a 85 m2 clean room, with 45 m2 of class 10/100 ● Include ultra-pure water production and HPR facility An Helium liquifier 2 options are under study : different cryogenic capacity New !! : a cavity chemistry facility A new addition to Supratech (not financed by the original Supratech project)

26. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 26 - SUPRATECH on the IPN orsay site : Clean room ▪ Total surface of 85 m2 ▪ 45 m2 of class 10/100 ▪ Ultrapure water production included ▪ High Pressure Rinsing implemented A clean room of sufficient dimensions to be able to assemble any type of cryomodule (max. Length 4m) Detailed study achieved. Call for tender started mid March 2006 Installation will start in June 2006 Facility expected to be ready end November 2006

27. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 27 - SUPRATECH on the IPN orsay site : Clean room

28. Sébastien Bousson – EURISOL CB Meeting - PSI, 15 June 2006 - 28 - Supratech Control room Helium Liquefier Clean room Clean Room Techn area. Chemistry process Chem. lab Cryomodule Assembly Hall Cryomodule Test Hall