MuCool Test Area RF Workshop 111/15/2010 Muons, Inc. Loaded Pillbox Cavity Milorad Popovic & Katheryn Decker French (with Mike, Chuck, Katsuya, Al and Rol)

Motivation MuCool Test Area RF Workshop211/15/2010 Muons, Inc. To fit pressurized cavities in HCC, size of cavity has to be reduced 800 MHz (from Katsuya) Maximum RF cavity radius = 0.08 m, (pillbox cavity 0.143) Radius of effective electric field (95 % from peak) = 0.03 m 400 MHz: Maximum RF radius = 0.16 m (pillbox cavity 0.286) Radius of effective electric field = 0.06 m Optimum electric field gradient = 16 MV/m For Pill Box Cavity, resonant frequency is

Other Applications MuCool Test Area RF Workshop311/15/2010 Muons, Inc. May be we can use this type of cavity for Neuffer’s Phase Rotation Canal. This was Cary Yoshikawa suggestion. The canal needs many cavities in range from ~300 to 200MHz. We can use, let say two sizes of Pill Box Cavity (same size different dielectric!) and adjust frequency in between using different iner radius, re-entrant nose cones!

Cavities for Neutrino Factory MuCool Test Area RF Workshop411/15/2010 Schematic of the Neutrino Factory front-end transport system. Initial drift (56.4 m), the varying frequency buncher (31.5m), The phase-energy (  -  E) rotator (36m), a cooling section. (A 75m cooling length may be optimal.) ParameterDriftBuncherRotatorCooler Length (m) Focusing (T) (ASOL) Rf frequency (MHz)360 to to Rf gradient (MV/m)0 to Total rf voltage (MV)

MuCool Test Area RF Workshop511/15/2010 Work done in Summer 2010

MuCool Test Area RF Workshop611/15/2010 Simulation-Microwave Studio

MuCool Test Area RF Workshop711/15/2010 Cavity Prototype & Measurements

MuCool Test Area RF Workshop811/15/2010 Results & Conclusions as August 2010

MuCool Test Area RF Workshop911/15/2010 Muons, Inc. Near Future Possibilities Build high power 800MHz cavity with Dielectric at Gap Modify it for use with Dielectric Liquid Put it inside Solenoid Magnet Do the same for 200MHz This program can be executed for 20 to 40K$ M&S This program can be accomplished in 4 to 8 months There will be need for two periods of one week each of MTA Muons, Inc has expressed interests in participation, intellectually and monetary We may be lucky and motivate somebody to put effort in low loss ceramics research and design Help is need it and everybody is welcome

MuCool Test Area RF Workshop1011/15/2010 Muons, Inc. Ceramics for 200MHz & cavity for 800MHz

MuCool Test Area RF Workshop1111/15/2010 RF Solenoid Dielectric Liquid Container Solenoid, Cavity, Liquid, … cavity

MuCool Test Area RF Workshop211/15/2010 Muons, Inc.

MuCool Test Area RF Workshop211/15/2010 Muons, Inc.

HCC Concept Muon Collider Design Workshop, Jefferson Lab1412/09/2008 Muons, Inc. Central Orbit and Beam EnvelopeSet of Coils Basic Building Block can be Cavity + Coils

 80GeV Linac 80GeV Linac Collider Ring  m Acceleration m Collisions