Muons, Inc.
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/
Rol - Jan 28, 2011
MEIC Workshop
1
Muons, Inc.
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)
Rol - Jan 28, 2011
MEIC Workshop
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Muons, Inc.
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Year
2008-11
2008-11
2009-12
2009-12
2009-10
2009-12
2009-12
2009-10
2009-12
2009-10
2009-10
2009-10
2010
2010
2010-11
2010-11
2010-11
2010-11
Rol - Jan 28, 2011
Project History (cont.)
Project
Expected Funds Research Partner
Pulsed Quad RLAs
$850,000
JLab (Bogacz)
Fiber Optics for HTS
$800,000
NCSU (Schwartz)
HOM Absorbers
$850,000
Cornell(Hoffstaetter)
Quasi Isochronous HCC $850,000
FNAL (Neuffer)
DC Gun Insulator
$100,000
JLab (Poelker)
H-minus Sources
$850,000
ORNL/SNS (Stockli)
Hi Power Coax Coupler $850,000
JLab (Rimmer)
Hi Field YBCO Magnets $100,000
NCSU (Schwartz)
f & f –locked Magnetrons $850,000
FNAL (Popovic)
Mono-E Photons
$172,588
2 contracts w PNNL
Project-X and MC/NF
$260,000
contract w FNAL
MCP and ps timers
$108,338
contract w ANL
MAP
$ 55,739
2 contracts w FNAL
805 MHz RF Cavity
$230,000
contract w LANL
ps detectors for MCDE
$100,000
U Chicago (Frisch)
Crab Cavities
$100,000
JLab (Rimmer)
Epicyclic PIC
$100,000
JLab (Derbenev)
MC detector bkgnds
$100,000
NIU (Hedin)
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Muons, Inc.
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
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
4
Muons,
Inc.
MuCool Test Area (MTA)
5T
Solenoid
Pressure
barrier
Wave guide to
coax adapter
Mark II
Test Cell
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
5
Muons,
Inc.
HPRF Test Cell Measurements in MTA
100 atm
Electrode breakdown region
Paschen region
Electrode breakdown region
• 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.
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
6
Muons, Inc.
Particle Motion in a Helical Magnet
Combined function magnet (invisible in this picture)
Solenoid + Helical dipole + Helical Quadrupole
Red: Reference orbit
Blue: Beam envelope

Opposing radial forces
Fh dipole  pz  B ; b  B
Fsolenoid   p  Bz ; B  Bz
Rol - Oct 13, 2010
2 a

Dispersive component makes
longer path length for higher
momentum particles and shorter
path length for lower momentum
particles.

pf
pz
Transforming to the frame of the rotating
helical dipole leads to a time and z –
independent Hamiltonian
b' added for stability and acceptance
Cornell - Bright Muon Beams
7
Muons, Inc.
Some Important Relationships
Hamiltonian Solution
1  2
p(a) 
k
kc
1  2
q  1  
k
3  2
Equal cooling
decrements
2
p
da
1


Dˆ 
2 2
a dp

Longitudinal
cooling only
~Momentum slip
factor
Rol - Oct 13, 2010

1  2 
 B   b


d

d
1  2

k  2
kc  B 1   2 p
q0
1  2   2 ˆ 1 

D 2 

3
2
   1 
 
Cornell - Bright Muon Beams
  ka
1
2 ˆ
D
2
~ 
transition
1  2
8
Katsuya Yonehara achievement!
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
9
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
10
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
11
This is a 24 cavity per period
400 MHz design
Magnet
Coil

Approximate
Diameter at
the coax
flange is 40”
Pill box
Cavity
Rol - Oct 13, 2010
Cornell - Bright Muon Beams
Coax
Feed
per
cavity
12
Muons, Inc.
YBCO HSM1.1
Fabrication and Test
Results
Miao Yu, Dan Turrioni,
Vito Lombardo
01/05/2011
Rol - Jan 28, 2011
MEIC Workshop
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Muons, Inc.
Goal of the study


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Conceptual design
Develop the fabrication technology of
double pancake unit model
Test the model at 4.2 K
Rol - Jan 28, 2011
MEIC Workshop
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Muons, Inc.
HSM1 Remind
• The model degraded at 290 A, ~20% SSL
• The degradation location: inner splices
Rol - Jan 28, 2011
MEIC Workshop
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Muons, Inc.
HSM1.1 Improvement
Soldering Kit
Rol - Jan 28, 2011
MEIC Workshop
Copper
Presser
16
Muons, Inc.
SSL at 77 K and 4.2 K
Ic is limited by the
perpendicular field on
the tape
Rol - Jan 28, 2011
MEIC Workshop
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Muons, Inc.
HSM1 and HSM1.1 Comparison
Coil1 Outer Splice
30.0
Coil2 Outer Splice
10 per. Mov. Avg. (Two coils with inner splices)
25.0
10 per. Mov. Avg. (HSM1 Test)
Voltage (10-6 V)
20.0
15.0
10.0
5.0
0.0
0
-5.0
Rol - Jan 28, 2011
200
400
600
800
1000
1200
1400
Current (A)
MEIC Workshop
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Muons, Inc.
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.
Rol - Jan 28, 2011
MEIC Workshop
19
Muons, Inc.
Next Step
• 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.
Rol - Jan 28, 2011
MEIC Workshop
20
Muons, Inc.

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

Experiment Support
(Dudnikov talk)
• H-minus with saddle RF antenna (Stockli-SNS/ORNL)
• Improved electron sources using surface acoustic waves (Poelker-JLab)
• 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),
Rol - Jan…
28, 2011
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MEIC Workshop