6th International Workshop on Neutrino FactoriesJuly 27, 2004

K. Nagamine

Meson Science Laboratory, Institute of Materals Structure Science, KEK

Physics Department, University of California, RiversideRIKEN, Honorary Scientist

University of Tokyo, Professor Emeritus

1. Introduction; Muon Radiography2. Possible Element Selective Muon Radiography3. Possible Muon Sources for Advanced Muon Radiography4. Accelerator System for Advanced Muon Radiography5. Detection System for Advanced Muon Radiography6. Conclusion;

ADVANCED MUON RADIOGRAPHY

Recent Achievements with Cosmic-Ray Muon

After Alvarez Experiment

a) Transmission Method; Radiography of Volcano

(KEK-RIKEN) Mt. Asama and Mt. Iwate

b) Perturbation Method; Multiple-Scattering Radiography

(LANL) Use of Drift-Chamber Pair

PRINCIPLE OF COSMIC-RAY MUONIMAGING

ATTENUATION OF MUON INTENSITY THROUGH ROCK

Unique Energy Spectrum for z

Range-Energy Relation for Muon in Rock

Unique Intensity of Penetrating Muon Through Rock

PROBING INNER-STRUCTURE OF VOLCANO

DATA-BASE FOR VOLCANIC ERUPTION

POSSIBULE MUON SOURCESFOR

ADVACED RADIOGRAPHY

Monochromatic, Intense, Pecil Beam Like

1. Meson Decay Enhancement

Production at Primary-Beam Target

A) + → 　　　　　 + + (100 %) Surface + Beam at PSI, TRIUMF, KEK, RAL

140 MeV/c2 4.1 MeV (30 MeV/c)

26 ns

B) K+ → 　　　　　 + + (63.4 %)

444 MeV/c2 　　 153 MeV (236 MeV/c) K-Decay + at Multi GeV Accelerator,

12 ns J-PARC-2. Muon Re-Acceleration from Zero-Energy Muon

3. Muons from -Factories

NEUTRINO FACTORIESFOR

ADVANCED MUON RADIOGRAPHY

Use of various energy muons available at the intermediate extraction from 2.5 GeV linac

COMPACT & MOBILE ACCELERATOR

FOR

ADVANCED MUON RADIOGARAPHY

Purpose

TOWRDS LARGE APLICATION FIELDS

Homeland Security, Medical Diagnostics,

Large-Scale Industrial, Machinery Inspection,

What is Mobile?

Movable from one place to the other within a few days

Mounted on a few trailers and movable in the high-way

A few × 3 m wide × 20 m long

Contribution to -factory

Same project at -Factory, Muon Detection System, etc.

COMPACT & MOBILE ACCELERATOR

FOR

GENERATION

To be mounted on 2.5 m wide 20 m long Trailer

►linear or circular?

Linac

Cyclotron, FFAG, Synchrotron, localization of radiation effects

► hadron on electron?

P(n) + A → ± + B more efficient

e + A → e+ + B + less efficient

+ C → D + ± compact circular machine

►Electron FFAG, 10 A, 400 MeV

EXAMPLE OF 400 MeV ELECTRON FFAG

Basic parameters of electron FFAG for muon source

Injector 30 MeV linac

Main ring

Energy 400 MeV

Current 10 A

Magnetic field Spiral, 1.5 T ・ m,

RF 100 MHz, 10 kV

Pulse shape 20 Hz, 1 s width Schematic layout of

400 MeV electron FFAG

COLLECTION AND MUON TRANSPORTATION

EXAMPLE OF LARGE ACCEPTANCE PION/MUON

CAPTURE

Basic parameters of SC solenoid for muon capture

Central field 3 T

Solenoid coil

Cold bore 30 cm

Warm bore 20 cm

Length 2 m

Heat load below 1W Beam optics for muon capture solenoid

TYPICAL EXAMPLE OF IN-FLIGHT COOLING

PROPOSAL FOR NEW EFFICIENT MUONIUM IONIZATION

Muonium ionization via resonant electron transfer to p+ in H plasma

RF BUNCHING OF SLOW + BEAM

Preparation for RF Acceleration

Example of RF bunching system for the fundamental RF frequency of 2,856 MHz of the succeeding linac

10 ns below 100 ps

ACCELERATOR FOR MUON ACCELERATION— 600 MeV MUON LINAC —

Typical example of the muon radiography object and required muon energy

Uranium hidden in Oil Rolley Oil, 3 m 600 MeV

Bluest furnace Fe, 0.3 m 400 MeV

Human body head Water, 0.3 m 60 MeV

Schematic view of 600 MeV Muon linac by using X-band RF source

Selection of RF Frequency

S-band (2.856 GHz)

X-band (11.2 GHz), etc.

T.M. Wangler (LANL) LA-UR-04-3846 (2004)

YIELD ESTIMATION FOR PROPOSED SYSTEM

Proposed accelerator systems for the advanced muon radiography

CONCLUSIONNew Application Fields of

Advanced Element-Selective Muon Radiography— July, 2004 —

Important Applications

1. Homeland Security

Detection of Special Nuclear Material

hidden in Oil-filled Oil Tanker in 20 second

2. Nuclear Reactor

Detecting Failures during full Operation

3. Blast furnace

Inside Structure Inspection and Efficiency Increase

4. Medical Diagnostics

Probing new Aspects of Brain Function

Oil transporting tanker with a capacity of 26 kl (left) and

a special nuclear material (right), potentially hidden inside the tanker.

Schemetic view of structure and

principle of blast furnace.