MuCool Test Area RF Workshop111/15/2010

Muons, Inc.

Loaded Pillbox CavityMilorad Popovic

&

Katheryn Decker French

(with Mike, Chuck, Katsuya, Al and Rol)

Motivation

MuCool Test Area RF Workshop 211/15/2010

Muons, Inc.

To fit pressurized cavities in HCC, size of cavity has to be reduced800 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 mOptimum electric field gradient = 16 MV/m

rrR

c

405.2

For Pill Box Cavity, resonant frequency is

Other Applications

MuCool Test Area RF Workshop 311/15/2010

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 Workshop 411/15/2010

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.)

Parameter Drift Buncher Rotator Cooler

Length (m) 56.4 31.5 36 75

Focusing (T) 2 2 2 2.5 (ASOL)

Rf frequency (MHz) 360 to 240 240 to 202 201.25

Rf gradient (MV/m) 0 to 15 15 16

Total rf voltage (MV) 126 360 800

MuCool Test Area RF Workshop 511/15/2010

Work done in Summer 2010

MuCool Test Area RF Workshop 611/15/2010

Simulation-Microwave Studio

MuCool Test Area RF Workshop 711/15/2010

Cavity Prototype & Measurements

MuCool Test Area RF Workshop 811/15/2010

Results & Conclusions as August 2010

MuCool Test Area RF Workshop 911/15/2010

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&SThis program can be accomplished in 4 to 8 monthsThere will be need for two periods of one week each of MTA Muons, Inc has expressed interests in participation, intellectually and monetaryWe may be lucky and motivate somebody to put effortin low loss ceramics research and designHelp is need it and everybody is welcome

MuCool Test Area RF Workshop 1011/15/2010

Muons, Inc. Ceramics for 200MHz & cavity for 800MHz

MuCool Test Area RF Workshop 1111/15/2010

RF

Solenoid

DielectricLiquid

Container

Solenoid, Cavity, Liquid, …

cavity

MuCool Test Area RF Workshop 211/15/2010

Muons, Inc.

MuCool Test Area RF Workshop 211/15/2010

Muons, Inc.

HCC Concept

Muon Collider Design Workshop, Jefferson Lab 1412/09/2008

Muons, Inc.

Central Orbit and Beam Envelope Set of Coils

Basic Building Blockcan be Cavity + Coils

80GeVLinac

80GeVLinac

ColliderRing

mAcceleration

mCollisions