Rol - Jan 28, 2011 MEIC Workshop 1

A Business Inspired by Muon Colliders(Can it contribute to electron-ion colliders?)

 Rolland P. Johnson

Muons, Inc. (http://www.muonsinc.com/) 

Muons, Inc. has been involved in inventions and their development that have improved the prospects for neutrino factories, stopping muon beams, and high luminosity muon colliders for Higgs factories and at the energy frontier.  Support has come from the DOE SBIR-STTR program and from contracts from national laboratories. With over $5M new grants and contracts in 2010, the staff (now 22), the number of research partners at labs and universities, and fields of interest are growing.

Please visit "Papers and Reports" and "LEMC Workshop" at

http://www.muonsinc.com/

Muons, Inc.

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Muons, Inc. Project History Year Project Expected Funds Research Partner 2002 Company founded 2002-5 High Pressure RF Cavity$600,000 IIT (Kaplan) 2003-7 Helical Cooling Channel$850,000 JLab (Derbenev) 2004-5† MANX demo experiment $ 95,000 FNAL (Yarba) 2004-7 Phase Ionization Cooling $745,000 JLab

(Derbenev) 2004-7 HTS Magnets $795,000 FNAL (Yarba) 2005-8 Reverse Emittance Exch. $850,000 JLab

(Derbenev) 2005-8 Capture, ph. rotation $850,000 FNAL (Neuffer) 2006-9 G4BL Sim. Program $850,000 IIT (Kaplan) 2006-9 MANX 6D Cooling Demo $850,000 FNAL

(Lamm) 2007-10 Stopping Muon Beams $750,000 FNAL

(Ankenbrandt) 2007-10 HCC Magnets $750,000 FNAL (Zlobin) 2007-8 Compact, Tunable RF $100,000 FNAL (Popovic) 2008-9 RF Breakdown Studies $100,000 LBNL (Li) ANL (Gai) 2008-9 Rugged RF Windows $100,000 Jlab (Rimmer) 2008-9 H2-filled RF Cavities $100,000 FNAL (Yonehara)(these are finished, while the next page has ongoing projects)

Muons, Inc.

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Project History (cont.) Year Project Expected Funds Research Partner 2008-11 Pulsed Quad RLAs $850,000 JLab

(Bogacz) 2008-11 Fiber Optics for HTS $800,000 NCSU

(Schwartz) 2009-12 HOM Absorbers $850,000 Cornell(Hoffstaetter) 2009-12 Quasi Isochronous HCC $850,000 FNAL

(Neuffer) 2009-10 DC Gun Insulator $100,000 JLab

(Poelker) 2009-12 H-minus Sources $850,000 ORNL/SNS

(Stockli) 2009-12 Hi Power Coax Coupler $850,000 JLab

(Rimmer) 2009-10 Hi Field YBCO Magnets $100,000 NCSU

(Schwartz) 2009-12 f & f –locked Magnetrons $850,000 FNAL

(Popovic) 2009-10 Mono-E Photons $172,588 2 contracts

w PNNL 2009-10 Project-X and MC/NF $260,000 contract w

FNAL 2009-10 MCP and ps timers $108,338 contract w

ANL 2010 MAP $ 55,739 2 contracts w FNAL 2010 805 MHz RF Cavity $230,000 contract w LANL 2010-11 ps detectors for MCDE $100,000 U Chicago

(Frisch) 2010-11 Crab Cavities $100,000 JLab (Rimmer) 2010-11 Epicyclic PIC $100,000 JLab

(Derbenev) 2010-11 MC detector bkgnds $100,000 NIU (Hedin)

Muons, Inc.

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Pressurized High Gradient RF Cavities (IIT, Dan Kaplan)

Copper plated, stainless-steel, 800 MHz test cell with GH2 to 1600 psi and 77 K in Lab G, MTA

Paschen curve verified Maximum gradient limited by breakdown of metal

• fast conditioning seen, no limitation by external magnetic field! Cu and Be have same breakdown limits (~50 MV/m), Mo ~28% better

Muons, Inc.

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5T Solenoid

Pressure barrier

Mark II Test Cell

MuCool Test Area (MTA)

Wave guide to coax adapter

Muons, Inc.

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HPRF Test Cell Measurements in MTA

Electrode breakdown regionPaschen region

Electrode breakdown region

Muons, Inc.

• Paschen curve verified • Maximum gradient limited by breakdown of metal.• Cu and Be have same breakdown limits (~50 MV/m), Mo(~63MV/m), W(~75MV/m).• Results show no B dependence, much different metallic breakdown than for vacuum cavities. • Need beam tests to prove HPRF works.

100 atm

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Particle Motion in a Helical Magnet

Blue: Beam envelope

2

z

papf

Red: Reference orbit

Magnet Center

Combined function magnet (invisible in this picture)Solenoid + Helical dipole + Helical Quadrupole

Dispersive component makes longer path length for higher momentum particles and shorter path length for lower momentum particles.

Muons, Inc.

Opposing radial forces;

;h dipole z

solenoid z z

F p B b B

F p B B B

Transforming to the frame of the rotating helical dipole leads to a time and z –independent Hamiltonianb' added for stability and acceptance

Some Important Relationships

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2

2

113

ckqk

21ck B p

2

2

1ˆ 2p daDa dp

0q

2 2 2

3 2 2

1 1 1ˆ1

d Dd

2

2ˆ

1D

2

1

transition

2 21 1( )p a B bk

2k ka Hamiltonian Solution

Equal cooling decrements

Longitudinal cooling only

~Momentum slip factor

~

Muons, Inc.

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Katsuya Yonehara achievement!

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This is a 24 cavity per period 400 MHz design

Approximate Diameter at the coax flange is 40”

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Magnet Coil

Pill box Cavity

Coax Feed per

cavity

YBCO HSM1.1 Fabrication and Test

ResultsMiao Yu, Dan Turrioni,

Vito Lombardo01/05/2011

Muons, Inc.

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Goal of the study Conceptual design

Develop the fabrication technology of double pancake unit model

Test the model at 4.2 K

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Muons, Inc.

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HSM1 Remind

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• The model degraded at 290 A, ~20% SSL• The degradation location: inner splices

Muons, Inc.

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HSM1.1 Improvement

Rol - Jan 28, 2011 Soldering KitCopper Presser

Muons, Inc.

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SSL at 77 K and 4.2 K

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Ic is limited by the perpendicular field on

the tape

Muons, Inc.

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HSM1 and HSM1.1 Comparison

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0 200 400 600 800 1000 1200 1400

-5.0

0.0

5.0

10.0

15.0

20.0

25.0

30.0

Coil1 Outer Splice Coil2 Outer Splice

Current (A)

Volt

age

(10-

6 V)

Muons, Inc.

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Conclusion HSM1.1 were tested successfully at 77

K and 4.2 K. It reached at least 86% SSL at 77 K and 75% SSL at 4.2 K.

The fabrication of the helical solenoid double pancake model was developed.

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Next Step

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• Dump resistor needs to be designed and fabricated. • Fabricate another two double pancake models and test

them.• Splice performance study (pressure, temperature, etc.)

• Assembly the two units, design the structure for the field sensor probe and test the assembled model.

Muons, Inc.

MEIC Workshop

Projects Relevant to MEIC High-field superconducting solenoids for shorter spin rotators

• YBCO HS solenoid development (Zlobin-FNAL)• Fiber optic sensors for monitoring and quench protection (Schwartz-NCSU)

SRF implementation• High-power co-axial couplers (Rimmer-JLab)• Phase and frequency-locked magnetron power sources (Popovic-FNAL)• HOM absorbers (Hoffstaetter-Cornell)• Crab cavities (Rimmer-JLab)• ACE3P (Advanced Computational Electromagnetics 3P) Code (Ko-SLAC)

Source development (Dudnikov talk)• H-minus with saddle RF antenna (Stockli-SNS/ORNL)• Improved electron sources using surface acoustic waves (Poelker-JLab)

Experiment Support• Fast, inexpensive, large area timing counters (~1ps, 1mm) (Frisch-UC)• Programs–G4beamline (Kaplan-IIT, Godunov-ODU)• background studies (Hedin-NIU)

Extensions, other attractions• Project-X (Nagaitsev-FNAL), ADSR (Bowman-ADNA), HS Apps (Fast-PNNL), …

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Muons, Inc.