fermilab proton driver and muons david johnson fermilab neutrino factory muon collider collaboration...

Fermilab Proton Driver and Muons

David JohnsonFermilab

Neutrino Factory Muon Collider Collaboration Meeting March 14, 2006

March 14, 2006 dej NFMCC 2

“Updated (~’06 )” ILC-PD (HINS) Interplay


Design fully ILC-Compatible PD Prove, Develop & Build Front-End in Meson (0-100 MeV)

Much of Technical Complexity in Front End Test Phase-Shifter Technology and RF Power Scheme with H-

Test RT-SC Transition Send First Beam (in the world) through Spoke Cavities

Design/Plan MI Injection Line & Upgrade ILC Test/PD Compatible Civil Construction

(Expected) Charges for HINS Program

Giorgio Apollinari - NuWorkShop FNAL 3/6-7/06


Finalize layout for injection into MI (optics & civil optimization) Determines footprint of linac enclosure Assure compatibility with existing and future transport lines

Booster -> Recycler (Proton plan stage 1) Replace Booster -> MiniBoone with HINS-> MiniBoone (2MW 8 GeV) (?) Allow for upgrade to HINS -> Recycler (?)

H- Transport/Injection workshop 12/04 -> no show stoppers 8 Gev H- Transport

Controlling losses during transport (Lorentz, Black body, Collimation absorbers) Collimation absorber design (momentum and betatron) Detailed magnet design

8 Gev H- Injection Modify MI FODO straight section to symmetric insert with a doublet (removes quad

from injection design and increase space between quads -> ~ 30 m) Currently highest H- injection is 1 GeV at SNS Further optimization and modeling of H- injection using foils (collaboration w/BNL)

Foil heating / lifetime Minimize uncontrolled loss at injection

Watch SNS laser stripping experiments/designs for possible implementation Linac absorber design

Design/Plan MI Injection Line & Upgrades


8 Gev H- Transport to Main Injector

’tron momentum momentum

MIm

atch

match


MI-10 Configuration for 8 Gev H- Injection

H-

H+

H0 ,H-

start

end

closed orbit(DC bumps)

foil

inj absorber

1.2T600G

Painting trims

Current MI10

MI10 for PD H- injection

32 m


No current guidance on “Test String” requirements from GDE Define and develop ILC specific test facility

Shallow construction -> electrons only (precludes usage as HINS)

Connection with Tev tunnel for damping ring tests (?) Develop facility which will serve both ILC requirements and

requirements for HINS MI depth (shielding good for 2 MW H-) Transport and injection capability to MI Include real estate for transporting electrons (to Tev

enclosure) What are muon facility requirements ?

Advanced planning to minimize future construction difficulties

Requirements to integrate into initial civil design (i.e. cavity layout, stubs for future construction, absorber location, etc)

Plan for generic wet land mitigation inside Tev ring (future land usage)

Lead time for Corp of Engineers construction permitting requires fixed construction footprint ~ 2yrs

ILC Test/PD Compatible Civil Construction


How Can PD Support A Muon Program ?

Provide intense proton source for Muon production via a 2MW proton accumulator / re-buncher

If muons can be cooled sufficiently, it could provide the second stage for muon acceleration from 1 GeV to 8 GeV (see M. Popovic talk) Spacing between cryo modules to inject/extract

muons Is this optimal for H- and electron acceleration?


Proton re-Buncher Ring

Proton Requirements for Neutrino Factories/Muon Collider (details discussed by D. Neuffer talk)

Short bunch lengths( few to 10’s ns), intense (few E13 ppb), fast rep rate (10 Hz ? Larger)

Initial Concept for a Proton re-buncher ring Hybrid FODO – doublet lattice (SNS like)

Includes: Four FODO arc sections (1.4T dipole, 8 m half cell) Two doublet long straight sections for injection and extraction

Requires ~30 m free straight for H- injection (current MI design) Two FODO straight sections for collimation and RF

Circumference (similar to Booster ~485 meters) but could be smaller Integrate into Linac dump line design

After betatron collimation Momentum collimation ? (enclosure, shielding, utilities, buildings)


Conceptual Design of re-Buncher

Injection ExtractionRF Collimation

8 m half cell Circumference ~485m T0 = 1.6 us Initial 1.54E14 in 3 ms >625 turn injection Ultimate 1.54E14 in 1

ms >1800 turn injection _________ For 2.2T dipole (l=2.9m) 6 m half cell Circumference ~300 m (including inj/ext

straight)


Proton Driver Support for Muon Program

~ 700m Active Length8 GeV Linac

8 GeVneutrino

MainInjector@2 MW

Anti-Proton

SY-120Fixed-Target

Neutrino“Super- Beams”

NUMI

Off- Axis Electrons for ILC Damping Ring Demo


Summary

HINS Program organization in place for the continued R&D and development of a High Intensity Neutrino Source (aka PD) at FNAL

Requirements for proton accumulator/re-buncher are needed to incorporate muon capability in PD.

If linac is to be used for muon acceleration, need detailed specifications for incorporation of connection to linac.

fermilab proton driver and muons david johnson fermilab neutrino factory muon collider collaboration...

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