FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Injection study for 6-sector PRISM FFAG Injection study for 6-sector PRISM FFAG by using pulsed alpha particlesby using pulsed alpha particles

Yasushi Arimoto, Toshiyuki Oki, Makoto Yoshida, Masaharu Aoki, Imam HYasushi Arimoto, Toshiyuki Oki, Makoto Yoshida, Masaharu Aoki, Imam Hossain, Y.Kuriyamaossain, Y.Kuriyama

Takahisa Itahashi, Yousuke Takubo, Chihiro Ohmori, Akira Sato,and YoshiTakahisa Itahashi, Yousuke Takubo, Chihiro Ohmori, Akira Sato,and Yoshitaka Kunotaka Kuno

Department of Physics, Graduate School of Science, Osaka Univ. 1-1 MachiDepartment of Physics, Graduate School of Science, Osaka Univ. 1-1 Machi

kaneyama, Toyonaka-shi, Osaka 560-0043, Japankaneyama, Toyonaka-shi, Osaka 560-0043, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Contents

Present status of PRISM-FFAG projectPresent status of PRISM-FFAG project

-Magnet design and construction -Magnet design and construction

-Field Measurement of three D-F-D magnets-Field Measurement of three D-F-D magnets

Procedure of proof for PRISM by alpha Procedure of proof for PRISM by alpha particles injection into a Test RF-cavity particles injection into a Test RF-cavity

Injection study for PRISM with alpha particle Injection study for PRISM with alpha particle in 6-sector accumulator ringin 6-sector accumulator ring

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Magnetic field measurementMagnetic field measurement

3-D field meaurement device from Prof. Mori, KURRI 3-D field meaurement device from Prof. Mori, KURRI

Power supplies from KEKPower supplies from KEK

Current stability in long term at a hot season Current stability in long term at a hot season

Mapping of a large area in and outside D-F-D magnetMapping of a large area in and outside D-F-D magnet

Three D-F-D magnetsThree D-F-D magnets

Calibration of Hall probes with NMR in dipole magnetCalibration of Hall probes with NMR in dipole magnet

Calibration of probe axis with a cubic small magnet Calibration of probe axis with a cubic small magnet

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Present status summary of PRISM-FFAG Present status summary of PRISM-FFAG

magnets (Dr. Y. Arimoto-san)magnets (Dr. Y. Arimoto-san)

Three PRISM-FFAG magnets have beenThree PRISM-FFAG magnets have been

manufacturedmanufactured

3D magnetic field map of the three magnets has been 3D magnetic field map of the three magnets has been measuredmeasured

Field measurement shows good consistency with Field measurement shows good consistency with TOSCA calculationTOSCA calculation

Precise analysis is now progressedPrecise analysis is now progressed

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Proof of principle of quarter-turn rotation in Proof of principle of quarter-turn rotation in

phase space for muons with a short lifetimephase space for muons with a short lifetime

Huge momentum spread : +/- 20%Huge momentum spread : +/- 20%

In a limited time for phase rotation : 2.2 In a limited time for phase rotation : 2.2 ss

Inj. & Ext. loss : as a little as possibleInj. & Ext. loss : as a little as possible

Low background at detector : circular structure Low background at detector : circular structure for accumulator, not directed to target for accumulator, not directed to target

= = PRISMPRISM

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

The reason for design of 6-sector The reason for design of 6-sector accumulator FFAG-ringaccumulator FFAG-ring

For proof of principle PRISM -2.2For proof of principle PRISM -2.2ss

For limited budget – magnets 3+2+(1)For limited budget – magnets 3+2+(1)

For limited time for project in 2002-2007For limited time for project in 2002-2007

For alpha particle injection- same ligidityFor alpha particle injection- same ligidity

For single acc. test-cavity For single acc. test-cavity

For simple injection, inflector,pulsing,For simple injection, inflector,pulsing,

For measurement energy and TOF- proof of principleFor measurement energy and TOF- proof of principle

For limited acceptance- small vacuum chamberFor limited acceptance- small vacuum chamber

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

6-sector FFAG accumulator ring with slant magnets 6-sector FFAG accumulator ring with slant magnets

manufactured for 10-sector PRISM-FFAGmanufactured for 10-sector PRISM-FFAG

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Momentum dependence of vertical and horizontal tune Momentum dependence of vertical and horizontal tune

of 6-sector accumulator ringof 6-sector accumulator ring

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Tune diagrams for 6-sector FFAG-RINGTune diagrams for 6-sector FFAG-RING

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Horizontal and vertical acceptanceHorizontal and vertical acceptance

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Alpha particles accelerated with an AVF cyclotron from 5.4 MeVAlpha particles accelerated with an AVF cyclotron from 5.4 MeV

to 30 MeV and extracted. Alpha source is located at the proper radius. to 30 MeV and extracted. Alpha source is located at the proper radius.

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Pulsar performance for ALPSPulsar performance for ALPS

Pulsing frequency: 1.0MHzPulsing frequency: 1.0MHz

Pulse width : 20~30 nsecPulse width : 20~30 nsec

Duty factor : 0.001Duty factor : 0.001

Pulsar voltage: DC + RF ~1.0 KVPulsar voltage: DC + RF ~1.0 KV

Pulsar length: 30 cmPulsar length: 30 cm

Pulsar gap: 25 mmPulsar gap: 25 mm

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Alpha particle source ALPSAlpha particle source ALPS

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

TOF measuring apparatusTOF measuring apparatus for an acceleration test for an acceleration test

cavitycavity

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

SummarySummary

Field measurement for three PRISM-FFAG magnets Field measurement for three PRISM-FFAG magnets has been completedhas been completed

Rf-cavity test for saw tooth wave form will be tried sRf-cavity test for saw tooth wave form will be tried soonoon

Alpha particle injection for cavity and sector magnet Alpha particle injection for cavity and sector magnet will be started. This is an appropriate preparation for will be started. This is an appropriate preparation for construction of PRISM-FFAG construction of PRISM-FFAG

POP for PRISM will be started in 6-sector ring, althoPOP for PRISM will be started in 6-sector ring, altho

ugh it has not so large acceptanceugh it has not so large acceptance

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Slides from 30-38 are something Slides from 30-38 are something for helpfor help

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Transported and injected muon beamTransported and injected muon beam

Dispersion matched at injectionDispersion matched at injectionCentral momentum : 68 MeV/cCentral momentum : 68 MeV/cRRequiequi = 6.5 m = 6.5 m

Momentum spread : +/- 20 %Momentum spread : +/- 20 %Beam intensity 10Beam intensity 101111 ~ 10 ~ 101212 / sec / sec Aperture : 30 cm (v) x 100 cm (h)Aperture : 30 cm (v) x 100 cm (h)

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Requirements forRequirements for diagnostics in diagnostics in FFAG-PRISM FFAG-PRISM

Comparison with anti-proton productionComparison with anti-proton productionSimilar facilities as PRISM was ? at CERN and will be AD-project at J-PASimilar facilities as PRISM was ? at CERN and will be AD-project at J-PA

RC(ref. E.Widman).RC(ref. E.Widman).AD : 200 pi mm mrad and dp/p = 6 %AD : 200 pi mm mrad and dp/p = 6 % : stable: stable : proton beam of capture momentum is : proton beam of capture momentum is very helpful for tuningvery helpful for tuning

: various cooling techniques are helpful for storage: various cooling techniques are helpful for storage Comparison with radio-active ion beam at RIBFComparison with radio-active ion beam at RIBF

MUSES : +/- 10 mrad and dp/p = 2.5 %MUSES : +/- 10 mrad and dp/p = 2.5 % : lifetimes of order of 1 microsec.: lifetimes of order of 1 microsec. : cooling and high luminosity are considered for collision: cooling and high luminosity are considered for collision

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Sci-FiberSci-Fiber

Sci-Fiber could be applied for beam diagnoSci-Fiber could be applied for beam diagnostics in PRISM-FFAGstics in PRISM-FFAGDr. M. Yoshida-san would have a short coDr. M. Yoshida-san would have a short comment for this issuemment for this issueMr. Takayanagi-san would like to develop tMr. Takayanagi-san would like to develop the device next yearhe device next year..

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Position sensitive solid state counter Position sensitive solid state counter (energy and TOF)(energy and TOF)

50 mm x 50 mm silicon strip solid state co50 mm x 50 mm silicon strip solid state counter for energy measurement unter for energy measurement rf-particle TOF measurementrf-particle TOF measurementTwo dimensional measurement between Two dimensional measurement between

position and energyposition and energy

FFAG-Workshop 2006, Kumatori, OsakFFAG-Workshop 2006, Kumatori, Osaka, Japana, Japan

Bunch rotation techniquesBunch rotation techniques