1. Muon Collider 2011 Workshop Jun 27-July 1 in Telluride, CO Gollwitzer & Nagaitsev presented Attending: Ankenbrandt, Lebedev, Pasquinelli, Popovic, and another 30 Fermilab

2. Program Plenary Sessions Parallel Sessions – Physics and Detectors – Accelerators Protons – Task Force, Upgrade Specifics Target Collection Cooling Acceleration Collider Ring Machine Detector Interface https://indico.fnal.gov/conferenceOtherViews.py?view=standard&confId=4146

3. Task Force Presentation (1) Project X & Muon Accelerator Program Feasibility path to Neutrino Factory/Muon Collider Project X upgrade – 4MW proton beam at 8GeV Reformatting of beam – Pulsed Linac beam out of Project X – 15Hz; single bunch of <3ns bunch length

4. Task Force Presentation (2) Project X upgrade – Average beam current 5mA – Peak beam current 10mA – Pulse linac operation rep rate 15Hz – Pulsed linac duty factor 10% (pulse length of 6.7ms) Reformatting of beam – Rings Accumulator and Compressor ~200m with h=8 – Delivery trombone system to form “single bunch”

5. Project X Solution(1) Details of Project X Impact of proposed upgrade – Front end: no impact – CW linac: depends upon 3GeV program Coupler optimization for running 5mA (10% duty cycle) and another possible current (90% duty cycle) – Pulsed linac: straight forward More RF power (higher current) Upgrade power couplers (higher current) More cryo capacity (longer pulse) – Conventional facilities: started investigating More water cooling More Klystrons (more floor space)

6. Project X Solution(2) Expect to “reuse” >75% of the cost of Project X Pulsed Linac Couplers – 2KW to 15KW Pulsed RF Power – 125KW/cavity Klystrons available Cryo capacity for Pulsed Linac: increase by 30% CW Linac Coupler: setting optimization for future 3GeV and pulsed linac average currents