1. MICE RFCC Module Update Allan DeMello Lawrence Berkeley National Lab MICE CM26 at Riverside California March 26, 2010

2. MICE RFCC Module Update – MICE CM26 at Riverside California Page 2 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 MICE RFCC Module Update Overview RF Cavities RF Cavity Frequency Tuners Cavity RF Coupler RFCC Schedule

3. MICE RFCC Module RF Cavity Update

4. MICE RFCC Module Update – MICE CM26 at Riverside California Page 4 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Progress Summary Fabrication of first 5 cavities by Applied Fusion finished in December 2009 In February 2010 the contract was awarded to Applied Fusion for fabrication of the second 5 cavities Physical measurement process has been started on the first 5 cavities Cavity RF frequency measurements have begun

5. MICE RFCC Module Update – MICE CM26 at Riverside California Page 5 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Fabricator - Applied Fusion, Inc. Contract for the second 5 cavities was awarded to Applied Fusion in February Applied Fusion fabricated the complete RF cavity (minus spinning) Electron beam welding machine

6. MICE RFCC Module Update – MICE CM26 at Riverside California Page 6 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 The second batch of spun cavity shells were delivered to Applied Fusion in February They have started fabrication of the second group of 5 cavities RF Cavity Shells

7. MICE RFCC Module Update – MICE CM26 at Riverside California Page 7 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Beryllium Windows Cavity Be windows are being fabricated by Brush Wellman Inc. LBNL has received three finished windows

8. MICE RFCC Module Update – MICE CM26 at Riverside California Page 8 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Be Window Cavity Be window alignment to nose ring looks good Some machining of the nose ring may be necessary to flatten mounting surface Be window mounted to cavity with clamping ring

9. MICE RFCC Module Update – MICE CM26 at Riverside California Page 9 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Physical Inspection Cavity being lifted out of shipping crate Cavity mounted in fixture being lifted onto CMM Cavity being inspected

10. MICE RFCC Module Update – MICE CM26 at Riverside California Page 10 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Inside Profile Measurement Special probe to measure the inside profile of the cavity Cavity interior profile being measured with special probe The profile will be used to verify cavity RF models

11. MICE RFCC Module Update – MICE CM26 at Riverside California Page 11 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Measurement Cavities waiting for frequency measurement Dr. Li measuring cavity frequency The Be windows are installed to give an accurate measure of the frequency

12. MICE RFCC Module Update – MICE CM26 at Riverside California Page 12 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Progress Summary Fabrication of first 5 cavities by Applied Fusion finished in December 2009 In February 2010 the contract was awarded to Applied Fusion for fabrication of the second 5 cavities Cavity physical measurement process started Cavity RF frequency measurements have begun

13. MICE RFCC Module Update – MICE CM26 at Riverside California Page 13 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Future Work The inside surface of each cavity needs to be electro-polished (done at LBNL) Physical and frequency measurements on the remaining 5 cavities when they become available Cavities must be “tuned” to each other for best center frequency (10 cavities) by plastic deformation if necessary (will be done at LBNL)

14. MICE RFCC Module RF Cavity Frequency Tuner Update

15. MICE RFCC Module Update – MICE CM26 at Riverside California Page 15 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuner Progress Summary Tuner design is complete ¼ scale model has been fabricated to test flexure concept One full size tuner arm (for testing the system) has been fabricated Aluminum test cylinder (1/6 of cavity) has been fabricated Actuator mechanical components have been fabricated Actuator bellows have been delivered to LBNL Assembly of an actuator has begun at LBNL Control system components have been delivered to LBNL

16. MICE RFCC Module Update – MICE CM26 at Riverside California Page 16 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuners 24 Dynamic Cavity Frequency Tuners per Module Tuner Actuator Tuners operate in a bi-directional “push - pull” mode (±2mm) Tuning automatically achieved through a frequency feedback loop

17. MICE RFCC Module Update – MICE CM26 at Riverside California Page 17 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuner Components Dual – action actuator Flexure tuner arm Actuator is screwed into the tuner arm Fixed ‏ connection Forces are transmitted to the stiffener ring by means of “push-pull” loads applied to the tuner lever arms by the dual action actuator assembly Tuner/actuators are thermally independent of the vacuum vessel

18. MICE RFCC Module Update – MICE CM26 at Riverside California Page 18 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Actuator Design Actuator design incorporates a sealed enclosure between vacuum and air. Actuator is mounted to the tuner arm only Bellows allows angular movement for actuator Piston plates are joined at the perimeter Piston plates incorporate hard stops

19. MICE RFCC Module Update – MICE CM26 at Riverside California Page 19 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 MICE RF Cavity – Mechanical Design and Analysis Actuator mechanical components have been fabricated and delivered to LBNL Prototype Actuator Components Center plate Lower piston Upper piston Lower support

20. MICE RFCC Module Update – MICE CM26 at Riverside California Page 20 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 MICE RF Cavity – Mechanical Design and Analysis Actuator design incorporates two bellows attached to the pistons and the center plate Prototype Actuator Components Upper bellow Lower bellow

21. MICE RFCC Module Update – MICE CM26 at Riverside California Page 21 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Tuner System Analysis The Von Mises stress at the flexure is 29.7 kpsi The input load by the air actuator is 800 lbs The tuner arm displacement is 0.214” (~0.43” bi-directional) [movement exaggerated] The cavity displacement is 1.05mm per side

22. MICE RFCC Module Update – MICE CM26 at Riverside California Page 22 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Tuner Flexure and Test Ring Full size (3” thick) prototype tuner flexure with test ring Threaded actuator mounting hole

23. MICE RFCC Module Update – MICE CM26 at Riverside California Page 23 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Emerson ER3000 electronic pressure controller ± 0.1% accuracy (over 110 psi range) 110 psi normal operating range (120 Max.) Remote computer controlled 16 required for two RFCC modules

24. MICE RFCC Module Update – MICE CM26 at Riverside California Page 24 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Tuner System Schematic

25. MICE RFCC Module Update – MICE CM26 at Riverside California Page 25 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Tuner System Components Computer Interface Controlled Leak Valve Regulator 5 Micron Filter Electronic Pressure Controller Power Supply Pressure Sensor

26. MICE RFCC Module Update – MICE CM26 at Riverside California Page 26 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuner Progress Summary Tuner design is complete ¼ scale model has been fabricated to test flexure concept One full size tuner arm (for testing the system) has been fabricated Aluminum test cylinder (1/6 of cavity) has been fabricated Actuator mechanical components have been fabricated Actuator bellows have been delivered to LBNL Assembly of an actuator has begun at LBNL Control system components have been delivered to LBNL

27. MICE RFCC Module Update – MICE CM26 at Riverside California Page 27 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuner Future Work Complete the assembly of the prototype actuator Assemble the complete actuation system Test the single actuator/tuner and cylinder system Work on the interfacing to the RAL computers Order parts for 6 actuators (incorporating any refinements from the prototype) Fabricate 5 more tuner flexures

28. MICE RFCC Module Update – MICE CM26 at Riverside California Page 28 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 RF Cavity Frequency Tuner Future Work Build a cavity suspension frame Test of the RF tuning system with 6 tuners and actuators on a cavity Actuators will be manifolded together Frequency measurements will be taken to verify the frequency tuning range

29. MICE RFCC Module Cavity RF Coupler Design Update

30. MICE RFCC Module Update – MICE CM26 at Riverside California Page 30 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Cavity RF Coupler Section view of cavity RF coupler Based on successful SNS design with a Toshiba window Detailed fabrication drawings of the major components are complete

31. MICE RFCC Module Update – MICE CM26 at Riverside California Page 31 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Cavity RF Coupler Assembly drawing of cavity RF coupler Prototype of outer coax assembly will be made

32. MICE RFCC Module Update – MICE CM26 at Riverside California Page 32 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Detail drawings of major components are complete Sources for fabrication materials (e.g. 4” outer coax tube) have been identified Assembly method has been determined Cavity RF Coupler Design Summary

33. MICE RFCC Module Update – MICE CM26 at Riverside California Page 33 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Cavity RF Coupler Future Work 16 Toshiba windows (plus spares) need to be ordered soon because of long lead times Myat RF couplers need to be purchased Prototype of the outer coax will be fabricated to verify assembly method Vendor selection process will be started

34. MICE RFCC Module Update – MICE CM26 at Riverside California Page 34 Allan DeMello- Lawrence Berkeley National Lab – March 26, 2010 Schedule Summary