SAMURAI

SAMURAI @ RIBF !

!Hideaki Otsu (RIKEN Nishina Center)

!!

FRIB HRS Workshop on July 11, 2014

at Michigan State University

SAMURAI

"SAMURAI @ RIBF" Today's contents

!

1. Overview 2. History 3. Properties/Constituents 4. Experimental programs 5. Summary

SAMURAI

Superconducting Analyzer for MUlti-particle from RAdio Isotope Beam with

7Tm of bending power

RI beam from BigRIPS

target

superconducting coil

pole(2m dia.)

rotate

vacuum chamber

Kinematically complete measurements by detecting multiple particles in coincidence

Ø Superconducting Magnet 3T with 2m dia. pole (designed resolution 1/700) 80cm gap (vertical)

Ø Heavy Ion Detectors Ø Proton Detectors Ø Neutron Detectors Ø Large Vacuum Chamber Ø Rotational Stage

Invariant Mass Measurement Missing Mass Measurement

ProtonHeavy Ion

Neutron

Slide: K. Yoneda

SAMURAI ~ New Spectrometer in RIBF ~

Construc)on                ~  2011  Commissioning          :  2012/03  First  experiments  :  2012/05

SAMURAI

SAMURAISAMURAI  beam  transport

Accelerator  Complex

RI  beam  separator

DALI

SAMURAI

xn+HI (neutron-rich side) (γ, n), unbound nuclei…

p+HI (proton-rich side) (γ, p) reaction,…

p,n(target frame)+HI (p,p’), (p,2p), (p,pn), …

pol. d-induced reaction

EOS measurement

Various Physics scoped on SAMURAI

SAMURAI

Approved programs and SAMURAI configuration

xn+HI (neutron-rich side) (γ, n), unbound nuclei…

p+HI (proton-rich side) (γ, p) reaction,…

p,n(target frame)+HI (p,p’), (p,2p), (p,pn), …

pol. d-induced reaction

EOS measurement

On-­‐Going On-­‐Prepara)on～2014−2015

Budgetary  Strategy  Stage

To  be  advanced    A>100  region

To be completed To be completed

Proposal Submitting to NPPAC on 2014/06

SAMURAI17,11: (p,n) inverse SAMURAI14: Fission SAMURAI12: Cluster on Be SAMURAI13: Polarization SAMURAI18(w/ MINOS): 2n correlation

SAMURAI15,22: EOS by π-/π+ measurement on HIC

Commissioning RUN: Day-one/two SAMURAI21(S grade): 28O SAMURAI20: 26O life SAMURAI09: Pigmy Dipole

SAMURAI

xn+HI (neutron-rich side) (γ, n), unbound nuclei…

p+HI (proton-rich side) (γ, p) reaction,…

p,n(target frame)+HI (p,p’), (p,2p), (p,pn), …

pol. d-induced reaction

EOS measurement

On-­‐Going On-­‐Prepara)on～2014−2015

Budgetary  Strategy  Stage

To  be  advanced    A>100  region

To be completed To be completed

Proposal Submitting to NPPAC on 2014/06

SAMURAI17,11: (p,n) inverse SAMURAI14: Fission SAMURAI12: Cluster on Be SAMURAI13: Polarization SAMURAI18(w/ MINOS): 2n correlation

SAMURAI15,22: EOS by π-/π+ measurement on HIC

Commissioning RUN: Day-one/two SAMURAI21(S grade): 28O SAMURAI20: 26O life SAMURAI09: Pigmy Dipole

Ground state 5 times higher statistics Æbetter determination of energy

Excited state at ~1.3MeV First observation Most probably 2+

No peak at ~4.2MeV 19

Decay energy (MeV)

Coun

ts /1

00ke

V

27F+CÆ26OÆ24O+2n (preliminary)

Excited state（new）

Decay energy spectrum (27F+CÆ26OÆ24O+2n)

Er<200keV

Er<120keV (95% CL)

E. Lunderberg et al.PRL108, 142503 (2012)

C. Caesar et al.PRC88, 034313 (2013)

Ground state

Slide by Y. Kondo(Tokyo Tech)

Approved programs and SAMURAI setup modes

SAMURAI

SAMURAI History

SAMURAI

Designing phase

• Broadband type spectrometer was originally designed as key device in RIBF project from the beginning (~ 1997).

T. Kobayashi, TAC report, Fig. 1-3, 2004

SAMURAI

•

Magnetic spectrometer so far considered (till 2004)

T. Kobayashi, WG report, 2004

SAMURAI

QD type Magnetic spectrometer so far considered (till 2004)

T. Kobayashi, WG report, 2004 pole: 1.6(W)x 2.8 (D)x1.0m(G) field: 3.0 T @4.4MAT weight: 620 t (585 t + 35t) stored energy: 36 MJ max field on coil: 4.0 T

250MeV/ A

A/ Z=1:3

250MeV/ A:

A/ Z=1:3

(1 ) C

(2 ) Q+C

Gap 0.9m

4.4 MAT

Gap 0.3m

1.5 MAT

QD mode : C-magnet + Q

0.3m with Q

Disadvantage: Inhomogeneous Power support of SC coil, Power support for yoke Coil link for SC coil, ...

SAMURAI

Magnet construction (2009-2011)

Rails for rotatable base Rotatable base with the first layer

Magnet yoke with poles

Coils with cryostats, LHe vessels

Vacuum chamber COMPLETED 2011/03

SAMURAICommissioning Experiment March 2012

SAMURAI

• SAMURAI : large/huge acceptance broadband type • Planned on RIBF design (~1997 ?) • Construction completed : 2011 • First beam : 2012 • dδ/δ~1/1500 (achieved value), 1/1000 (designed value) • Rmax/Rmin : 2~3 • Vertical acceptance : 170mrad (± 5°) designed → 140mrad • Horizontal acceptance (for n) : 340 mrad (± 10°)

• ZeroDegree : extension of beam line from BigRIPS • Planned on RIBF design (~1997 ?) • Construction completed : 2007 • First beam : 2008 • dδ/δ=1/1240 (Large acceptance mode : 6%, H/V 90/60 mrad) • dδ/δ=1/4000 (Dispersive spectrometer mode : 4%, H/V 40/60 mrad)

Spectrometer on RIBF

SAMURAI

Spectrometer on RIBF

• ZeroDegree : extension of beam line from BigRIPS • Planned on RIBF design (~1997 ?) • Construction completed : 2007 • First beam : 2008 • dδ/δ=1/1240 (Large acceptance mode : 6%, H/V 90/60 mrad) • dδ/δ=1/4000 (Dispersive spectrometer mode : 4%, H/V 40/60 mrad) "

• SHARAQ : high resolution spectrometer for RI beam by CNS • Kick off on 2004(?) • TAC : 2005 • Construction completed : 2009 (2 years earlier than SAMURAI) • First beam : 2010 (2 years earlier than SAMURAI) • dδ/δ=1/15000

SAMURAI

SAMURAI Properties/Constituents

SAMURAI

26,27F/27,28Ne    250MeV/u  (from  BigRIPS)

24O

n

n

NEBULA

DALI2

MWDC

Hodoscope

Dipole  Magnet  3T

Pb/C  target MWDC

MWDCs

ICPlasAc  ScinA.

Typical n-HI measurement Experimental setup

SAMURAI  beam  line  detectors• Detectors  for  incoming  beams:  beam  posiAon  (BDC),  PID(PlasAc  and  ICB),  γ(DALI2)  and  tracking  detector(FDC1)  for  electro-­‐magneAc  spectroscopy  at  SAMURAI.

STQ

DALI2

BDC1BDC2

ICBPlasJc

Target

FDC1

beam

SAMURAI  Focal  plane  detectors• Detectors  for  fragments:  FDC2  for  tracking,  HODO  for  ΔE  and  TOF,  ICF  for  ΔE.  

• Proton  driQ  chamber  (PDC),  CsI  total  energy  detector  (TED),  and  total  internal  reflecAon  Cherenkov  (TIRC)  will  come  in  the  future.

HODO  (PlasJcs)

ICFFDC2fragments

SAMURAI

Offline analysis : much better than those of on-line phase.

• On-line : 7σ separation

↓

• 13 σ separation @ A~25 →3σ separation @ A~100

(expected)

Courtesy of Y.Kondo

• Design  – 240  Neutron  counters  – 48  VETO  counters  – arranged  into  4  stacks  

• DetecAon  efficiency~40%  for  1n  (Currently)  

• Large  acceptance  – 3.6m  (H)  x  1.8m  (V)  effecAve  area  

Half(120  modules)  is  funded  and  completed.

SAMURAI-­‐NEBULANeutron-­‐detecAon  system  for  Breakup  of  Unstable-­‐Nuclei  with  Large  Acceptance

neutron

SAMURAI

SAMURAI Vacuum Window

• Neutron window : SUS 3mmt : 2430 × 800 mm2 • for neutrons ~ 250 MeV to pass through • De-dimension configuration applied

Estimated by ANSYS calculation → Deformation is reasonably small

The both side of Kevlar and Mylar were slacked about 5 mm to have a deflection of 40 mm in the initial condition. Kevlar and Mylar were fixed on the window frame with gluing more than 70 mm width. One day after gluing Kevlar and Mylar, this vacuum partition window was mounted on the test vacuum chamber. Achieved vacuum level was a few Pa by a rotary pump. Maximum deflection was about 60 mm. Í They elongated about 3.0 %

Vacuum system for the SAMURAI spectrometer Y. Shimizu, H. Otsu, T. Kobayashi, T. Kubo, T. Motobayashi, H. Sato, K. Yoneda

F12 STQ25

SAMURAI Beam Line SAMURAI

Vacuum Pumping System

Requirement • Lower reaction loss on partition window material. • To support itself with sufficient strength. • The area to be covered is 2430 x 800 mm2. Design • SUS304 with a thickness of 3mm. • Sectorial cylinder which has central angle of 60 degrees. • Safety factor is required to be 10. 1. To be mounted almost permanently. 2. Stress is less than 52 MPa (Tensile strength of SUS304: 520 MPa). ANSYS • Deflection and stress were calculated by using ANSYS. • Deflection: 0.22 mm • Stress: 45 MPa

Case 1: Flat board with a thickness of 3 mm O.K. : Thin thickness N.G. : Large deflection and stress

Deflection: 13.8 mm Stress: 814 MPa

Case 2: Flat board with a thickness of 30 mm O.K. : Small deflection and stress N.G. : Large reaction loss

Deflection: 0.22 mm Stress: 29 MPa

Case 3: Sectorial cylinder with a thickness of 3 mm O.K. : Small deflection and stress O.K. : Small reaction loss N.G. : Very  expensive  …

Deflection: 0.17 mm Stress: 43 MPa

Requirement • Lower multiple scattering and lower energy loss on partition window. • Upper limit of thickness: radiation length of L/LR ~ 10-3. To achieve the momentum resolution 1/700 • The area to be covered is 2940 x 800 mm2. • Hold vacuum Combination of Kevlar and Mylar Test of large exit window • Test window: 2800 x 1000 mm2. • Collapse 1) When the gluing was not sufficient, the collapse of foil occurred. 2) When the vacuum pressure was achieved to less 8 kPa, the Mylar elongated more 9.0 %. Î Mylar split and then collapse occurred.

• Practical point of view 1) Gluing sufficiently! 2) Not to elongate the Mylar more 9.0 %! Design • Mylar foil with thickness of 0.075 mm and width of 1250 mm. For vacuum separation • Kevlar cloth (K49 fiber) with thickness of 0.28 mm and width 0f 1270 mm. For supporting pressure • Mylar and Kevlar were glued with the Araldite to the top of a support flame which

is made of SUS304. Opening area is reduced to 2800 x 400 mm2

• In order to have a deflection of 40 mm around center region in the initial condition, the both sides of Kevlar and Mylar were slacked about 5 mm.

3D Gallery

Test of large exit window Collapsed case

Photographic of window for neutrons

Configuration of the vacuum partition window

Gluing with the Araldite

70 mm

Future development • For future experiments measuring heavy

fragments and light charged particles in coincidence, light charged particles are fully spread on the vacuum partition window.

• In order to detect light charged particles efficiently, the vacuum partition window is need to have the maximum size of 800 mm in vertically.

• We need new window frame of the form similar to the neutron window.

Mounted on SAMURAI

Vacuum test by using test chamber

Procedure for mounting Kevlar and Mylar on frame

60o

800 mm

Vacuum pumping system • Beam line: (1100 l/s TMP + rotary pump) x 1 • SAMURAI: (2400 l/s TMP + rotary pump) x 2 It took 3 hours to reach 10 Pa by two rotary pumps. In commissioning two TMPs were not used. • The vacuum level was kept around a few Pa

excepted with the vacuum leak from target chamber.

SAMURAI vacuum chamber Design • Large acceptance Horizontal space: 3.4 m Î ±10 degrees Vertical gap: 0.8 m Î ± 5 degrees Large angular acceptance for neutron • Two pipes For the (J,p) type experiment with high momentum resolution mode Auxiliary usages Accurate geometry calibration Connection with vacuum pump system • Two windows Beam entrance & vacuum pump connection Separation of heavy ions and neutrons or protons

We need two vacuum windows!!

3400 1720

1000 2820

5640

1720 1120

2430 2430

I390

The both side of Kevlar and Mylar were slacked about 5 mm to have a deflection of 40 mm in the initial condition. Kevlar and Mylar were fixed on the window frame with gluing more than 70 mm width. One day after gluing Kevlar and Mylar, this vacuum partition window was mounted on the test vacuum chamber. Achieved vacuum level was a few Pa by a rotary pump. Maximum deflection was about 60 mm. Í They elongated about 3.0 %

Vacuum system for the SAMURAI spectrometer Y. Shimizu, H. Otsu, T. Kobayashi, T. Kubo, T. Motobayashi, H. Sato, K. Yoneda

F12 STQ25

SAMURAI Beam Line SAMURAI

Vacuum Pumping System

Requirement • Lower reaction loss on partition window material. • To support itself with sufficient strength. • The area to be covered is 2430 x 800 mm2. Design • SUS304 with a thickness of 3mm. • Sectorial cylinder which has central angle of 60 degrees. • Safety factor is required to be 10. 1. To be mounted almost permanently. 2. Stress is less than 52 MPa (Tensile strength of SUS304: 520 MPa). ANSYS • Deflection and stress were calculated by using ANSYS. • Deflection: 0.22 mm • Stress: 45 MPa

Case 1: Flat board with a thickness of 3 mm O.K. : Thin thickness N.G. : Large deflection and stress

Deflection: 13.8 mm Stress: 814 MPa

Case 2: Flat board with a thickness of 30 mm O.K. : Small deflection and stress N.G. : Large reaction loss

Deflection: 0.22 mm Stress: 29 MPa

Case 3: Sectorial cylinder with a thickness of 3 mm O.K. : Small deflection and stress O.K. : Small reaction loss N.G. : Very  expensive  …

Deflection: 0.17 mm Stress: 43 MPa

Requirement • Lower multiple scattering and lower energy loss on partition window. • Upper limit of thickness: radiation length of L/LR ~ 10-3. To achieve the momentum resolution 1/700 • The area to be covered is 2940 x 800 mm2. • Hold vacuum Combination of Kevlar and Mylar Test of large exit window • Test window: 2800 x 1000 mm2. • Collapse 1) When the gluing was not sufficient, the collapse of foil occurred. 2) When the vacuum pressure was achieved to less 8 kPa, the Mylar elongated more 9.0 %. Î Mylar split and then collapse occurred.

• Practical point of view 1) Gluing sufficiently! 2) Not to elongate the Mylar more 9.0 %! Design • Mylar foil with thickness of 0.075 mm and width of 1250 mm. For vacuum separation • Kevlar cloth (K49 fiber) with thickness of 0.28 mm and width 0f 1270 mm. For supporting pressure • Mylar and Kevlar were glued with the Araldite to the top of a support flame which

is made of SUS304. Opening area is reduced to 2800 x 400 mm2

• In order to have a deflection of 40 mm around center region in the initial condition, the both sides of Kevlar and Mylar were slacked about 5 mm.

3D Gallery

Test of large exit window Collapsed case

Photographic of window for neutrons

Configuration of the vacuum partition window

Gluing with the Araldite

70 mm

Future development • For future experiments measuring heavy

fragments and light charged particles in coincidence, light charged particles are fully spread on the vacuum partition window.

• In order to detect light charged particles efficiently, the vacuum partition window is need to have the maximum size of 800 mm in vertically.

• We need new window frame of the form similar to the neutron window.

Mounted on SAMURAI

Vacuum test by using test chamber

Procedure for mounting Kevlar and Mylar on frame

60o

800 mm

Vacuum pumping system • Beam line: (1100 l/s TMP + rotary pump) x 1 • SAMURAI: (2400 l/s TMP + rotary pump) x 2 It took 3 hours to reach 10 Pa by two rotary pumps. In commissioning two TMPs were not used. • The vacuum level was kept around a few Pa

excepted with the vacuum leak from target chamber.

SAMURAI vacuum chamber Design • Large acceptance Horizontal space: 3.4 m Î ±10 degrees Vertical gap: 0.8 m Î ± 5 degrees Large angular acceptance for neutron • Two pipes For the (J,p) type experiment with high momentum resolution mode Auxiliary usages Accurate geometry calibration Connection with vacuum pump system • Two windows Beam entrance & vacuum pump connection Separation of heavy ions and neutrons or protons

We need two vacuum windows!!

3400 1720

1000 2820

5640

1720 1120

2430 2430

I390

CONCEPT: De-dimension 2D geometrical degree of freedom → approximately restricted to 1D deformation

Calculation results: Deflection : 0.22 mm Stress(Max.) : 29 MPa Y. Shimizu, EMIS2012 proceedings

SAMURAI

SAMURAI Vacuum Window

• Charged particle window : 2940 × 800 mm2

for HI ~ 250 MeV to pass through • 400mm → 800mm

by De-dimension concept successfully introduced on n-window

Membrane configuration : (same) Mylar 75 µm / Kevlar(K49) 0.28 mmt

Put to the practical usage on 2013/01 for Day-2 experiments

SAMURAI

Position determination of devicesupstream and downstream of the magnet

• Photo Grammetry System (PGS) • as RIKEN Common usage device , FY2010

BDC1BDC2

DALI

STQ25

Every target is identified as a green marker.

Spurious reflections are noted as red markers

1. Paste target markers on devices 2. Take pictures surrounding from the devices

Reconstruct to 3D position by dedicated software (VStars)

SAMURAI Team Leader

Establishment of position measurement by PGS unbiased by human experiences or eyes

DALIBDC1,2

STQ25

SAMURAI dipole magnet

FDC2

FDC1

Hodoscope

NEBULA

Nor

th W

all

West Wall

~1000 pictures ~800 targets (+288 coded targets)

"Overall accuracy : 300 µm(RMS)

3500mm

dZ=20 m

dX=14m

dY=4m

Scale bars

SAMURAI Day-one; 2012/05/21

3D reconstructed positions of each target marker

SAMURAI Team Leader

Scaaering  Angular  ResoluAon  à0.9mrad  (rms)  Bρ ResoluAon  à1/700  (one-­‐path  analysis)  à1/1500 (sophisticated) à5σ mass resolution for A=100

Absolute momentum analysis from BDC1,2 − FDC1,2 tracking + B field(TOSCA calculation)

Here Decay  energy  (MeV)

Coun

ts  /5

0keV

Results of precise position determination

27F+C→24O+2n (preliminary)

By Y. Kondo

Decay energy spectrum: 26O w/o artificial offsets/treatments

T.Kobayashi et al., NIMB317(2013)294-304

Each detector position (and angle) are determined within 150µm(RMS)→ Successfully reduce the large contribution of systematic error on momentum analysis

Utilized to other RIBF beam line

SAMURAI

SAMURAI experimental programs

SAMURAI

Approved experimental program and Related devices

1) “Ready” programs • SAMURAI17 M. Sasano/R.G.T. Zegar

Study of Gamow-Teller and spin-dipole transitions from 132Sn via the (p,n) reaction at 270 MeV/u

• SAMURAI11 M. SasanoStudy of Gamow-Teller transitions from 48Cr (and 64Ge) via the (p,n) reaction at 190 MeV

• SAMURAI14 D. Muecher(W. Henning)Fission Barrier Studies of Neutron-Rich Nuclei via the (p,2p) Reaction

• SAMURAI12 D. BeaumelCluster structure of Beryllium isotopes and study of multi-neutron systems

• SAMURAI13 S. SakaguchiVector analyzing power measurement for p-6He elastic scattering at 200 MeV/A

WINDS

pol-p Target

Si tele.

Only test part is ready

Done on 2014/03-04

Done partly on 2014/03-04

SAMURAI

Approved experiments (2013/12) to be performed in near future

2) Programs waiting for “User Devices” • SAMURAI15/SAMURAI22 W. G. Lynch/T. Murakami/T. Isobe/B. Tsang

Study of density dependence of the symmetry energy with the measurements of charged pion ratio in heavy RI collisions

• SAMURAI20 C. Caesar(T. Aumann)Measurement of the neutron-decay lifetime of the 26O ground state at the SAMURAI setup at RIBF

• SAMURAI21Y. Kondo Spectroscopy of unbound oxygen isotopes II : 28O → 4n Detection

• SAMURAI09R1 T. Kobayashi/Y. ToganoElectric dipole response of neutron-rich Ca isotopes

• SAMURAI18R1 A. Corsi/Y. KubotaTwo-Neutron Momentum Correlation in Borromean Nuclei

3) Programs waiting for “SAMURAI Development” • SAMURAI14 D. Muecher(W. Henning)

Fission Barrier Studies of Neutron-Rich Nuclei via the (p,2p) Reaction

MINOS/!recoil p,n detector

SAMURAI TPC

A~200 Detection @ FP

Decay Tagging

neu-LAND/MINOS

γ-CATANA

MINOS : !Operated at RIBF on 2014 Spring

SAMURAI

Submitted program on coming NP-PAC(2014/06) 4) Very new programs

• SAMURAI23 T. Isobe/T. Murakami/W. G. Lynch/B. TsangStudy of density dependence of the symmetry energy with the measurements of proton to neutron ratio in heavy RI collisions

• SAMURAI24 V. Panin(RNC)Investigation of proton-unbound states in neutron-deficient isotopes 66Se and 58Zn

• SAMURAI26 N. Iwasa(Tohoku) Study of resonance states in 34Ca using neutron removal reactions of 35,36Ca

• SAMURAI25 Z. Elekes(ATOMKI)Study of nuclear reactions relevant for type I X-ray bursts

• SAMURAI27 N. Kobayashi (UT)Spectroscopy of Odd-A Nuclei in the Island of Inversion ; 31Ne, 37Mg "

• SAMURAI19R1 S. Paschalls (TU Darmstadt)Investigation of the 4n system at SAMURAI by measuring p,pα quasi-free scattering at large momentum transfer in complete kinematics

SAMURAI 90Deg.

γ-CATANA

SAMURAI TPC

Deferred because 2weeks MT has been already approved

Approved as B grade,"Plenned to be upgrade

SAMURAI

Assembly completed May 2013

Pad plane readout tested with pulsers. Testing with cosmic rays and sources are on going. Experiments will use GET (Generic Electronics for TPC’s)  readout  electronics.   Testing with gating grid driver is on going. TPC will be shipped to RIKEN at February 2014.

2013/9/12 Neutron Star Matter "Koubo Kenkyu"

SAMURAI TPC status

New γ-ray calorimeterCATANAYasuhiro Togano

Tokyo Institute of TechnologySupported by

Grant-In-Aid for Scientific Research on Innovative Areas“Nuclear Matter in neutron stars investigated by experiments and astronomical observations”

SAMURAI International Collaboration Workshop 2013

Slide from Sπrit group

SAMURAI

CATANA CAlorimetric deTector for rAdiation from exotic Nuclear beAms

• Study for E1 responses on medium heavy (n-rich) nuclei→ high multiplicity γ detection from residual nuclei

Setup

neutrons

charged fragments

Beamγ

NEBULA

DALI2CATANADALI →

CATANA•CAlorimetric deTector for rAdiations from exotic Nuclear

beAms

• Crystals: CsI

Beam

15 cmt/9.5cmt CsI(Na) array

New γ-ray calorimeterCATANAYasuhiro Togano

Tokyo Institute of TechnologySupported by

Grant-In-Aid for Scientific Research on Innovative Areas“Nuclear Matter in neutron stars investigated by experiments and astronomical observations”

SAMURAI International Collaboration Workshop 2013

Ready on 2015

εγ(1MeV) : 25%(DALI) → 65％(CATANA)CATANA

Slide from Y. Togano

SAMURAI

Summary

• SAMURAI Overview • History

• Properties/Constituents • dδ/δ~1/1500 (achieved value), • dA/A ~ 1/300 (achieved value, governed by lack of TOF resolution)

• to be improved up to design value of 1/500 (5σ on A~100)

• Experimental programs • Experiments with each SAMURAI configuration proposed • Several programs are waiting for MT assignment • Various user devices will be introduced coupled with

SAMURAI (??? because of simplicity of SAMURAI ???)

SAMURAI

One more thing…

• SAMURAI ⇄ SHARAQ • SAMURAI : Neutron detection but limited resolution • SHARAQ : high resolution but no chance on neutron "

• + no chance to extend Zero degree type spectrometer downstream of SAMURAI because of limitation of building "

• So, I think high resolution property coupled with neutron detection is very unique,even if it is designed on R3B-Grad magnetic spectrometer. "

• QD for HI-p configuration for recovering vertical divergence.