1. 1 Alan Bross AEC March 31, 2008 MuCool RF Program Muon Cooling R&D Alan Bross

2. 2 Alan Bross AEC March 31, 2008 MuCool  Consists of 10 institutions from the US, UK and Japan RF Development ANL Cockcroft Institute Fermilab IIT JLAB LBNL Mississippi Absorber R&D Fermilab IIT KEK NIU Mississippi Osaka Solenoids LBNL Mississippi  Mission u Design, prototype and test all cooling channel components u 201 MHz RF Cavities, LH 2 absorbers, SC solenoids u Support MICE (cooling demonstration experiment) u Perform high beam-power engineering test of cooling section components

3. 3 Alan Bross AEC March 31, 2008 Muon Collider detect or  Fermilab Muon Complex - Vision

4. 4 Alan Bross AEC March 31, 2008 Muon Complex Evolution

5. 5 Alan Bross AEC March 31, 2008 MuCool Test Area  Facility to test all components of cooling channel (not a test of ionization cooling) u At high proton beam power s Designed to accommodate full Linac Proton Beam Power s 1.6 X 10 13 p/pulse @15 Hz – 2.4 X 10 14 p/s –  600 W into 35 cm LH 2 absorber @ 400 MeV u RF power from Linac (201 and 805 MHz test stands) s Waveguides pipe power to MTA

6. 6 Alan Bross AEC March 31, 2008 MTA Hall

7. 7 Alan Bross AEC March 31, 2008 RF R&D – 201 MHz Cavity Design  The 201 MHz Cavity – 19 MV/m Gradient Achieved Limited by available power (Design – 16 MV/m) [B=0] Note: This cavity was assembled at TJNL using techniques/procedures used for SCRF Did Not Condition!

8. 8 Alan Bross AEC March 31, 2008 201MHz Cavity Processing  We have now removed the flat-thick Cu windows used for initial tests u Installed curved thin Be windows

9. 9 Alan Bross AEC March 31, 2008 MICE Cooling Channel LH 2 absorbers Eight 201-MHz RF cavities

10. 10 Alan Bross AEC March 31, 2008 But There is a Hitch Magnetic Field Effects

11. 11 Alan Bross AEC March 31, 2008 805 MHz  Data seem to follow universal curve u Max stable gradient degrades quickly with B field  Re-measured u Same results u Does not condition Gradient in MV/m Peak Magnetic Field in T at the Window

12. 12 Alan Bross AEC March 31, 2008 805 MHz Imaging

13. 13 Alan Bross AEC March 31, 2008 201 MHz Cavity Operation in B Field  Initial 201 MHz operation in B Field u Limited to few hundred Gauss s Using Fringe Field of 4T magnet (in blue)

14. 14 Alan Bross AEC March 31, 2008 201 in Position  We have now moved 201 as close as possible to 5T solenoid  Can obtain  1.5T on near window of 201

15. 15 Alan Bross AEC March 31, 2008 First Beam Experiments  Currently 5T magnet and 201 cavity on floor (below beam ht.)  We will raise equipment to beam height u Also flip orientation of 201 MHz cavity and magnet  Goal u First Beam Experiment (Muon’s Inc HP RF Test Cell) by end of 2008

16. 16 Alan Bross AEC March 31, 2008 Phase II - Configuration

17. 17 Alan Bross AEC March 31, 2008 MuCool RF Plans for the Rest of the Year  805 MHz RF studies – Buttons (with and without B field) s Materials tests s Surface treatment (HP Wash + EP (from UK), ALD (Argonne) s E X B study  201 MHz RF u Continue B field studies  Complete MTA cryo infrastructure installation and commission system  Commission Beam Line  First tests with Beam Complete by January 09 u Test of HP H 2 RF test cell with beam