# Presentation: 758499

## Layout of RIKEN RI beam factory (RIBF) in 2007

- ZeroDegree

- (old)

- fRC

- IRC

- SRC

- RRC

- RILAC

- RIPS

- RARF

- ZeroDegree

- BigRIPS

## Performance of RIBF

- p~U
-   345 MeV/u
-   1 pA (6x1012 /sec)
-     (goal)

- Projectile fragmentation
- In-flight fission of U

- 345 MeV/nucleon

## ray spectroscopy at RIBF

**2008/1/23-25**
**Joint JUSTIPEN-LACM Meeting **
**@Oak Ridge**
- AOI Nori, RIKEN

- * RIKEN RIBF, BigRIPS, ZeroDegree
- * **spectroscopy at RIBF
- * Beam Intensity

*the world heaviest cyclotron*
*SRC*

*1998-2006*

## ray spectroscopy at RIBF

**2008/1/23-25**
**Joint JUSTIPEN-LACM Meeting **
**@Oak Ridge**
- AOI Nori, RIKEN

-  RIKEN RIBF, BigRIPS, ZeroDegree
-  **ray spectroscopy at RIBF
-  Expected Primary and Secondary
- 	    Beam Intensity

##    - Energy=   345 MeV/u up to U ions			          400 MeV/u for light A ions

- Configuration of the RIBF accelerator complex

-    - Energy=   345 MeV/u up to U ions			          400 MeV/u for light A ions
-    - Intensity= 1 pμA up to U ions (6x1012 par./sec)
-    - Max. beam power= 83.3 kW  (238U at 350MeV/u)

- -> Production reaction: in-flight fission of U beams as well as projectile fragmentation

- Goal performance of RIBF cyclotrons

- Several modes in the cascade operation

## Standard beam-line detectors at BigRIPS/ZeroDegree focuses

- (position)

- MUSIC
- (ΔE)
- @F7, (F2, F3)

- Plastic scinti.
- (TOF)

- Ge @F7 for isomer γ-decay measurement
- (Isomer PID)

- Si (ΔE) @F7, F2, F3

- NaI (E) @F7

- Intensity monitor (primary beams) @F0

- To be ready soon

- Plastic

- Si

- FCT

## A/Q

*A/Q*

*Z*

- Identification from *B*ρ*, TOF, *Δ*E, E*
- with an empirical matrix for optics

- δA/Q) = 0.05% (AZr, at 1σ)

*A/Q*

**122****Pd**

**123****Pd**

**124****Pd**

**125****Pd (27 counts)**

- 122Pd45+

- 121Pd45+

- 120Pd45+

- 119Pd45+

- 123Pd45+

**126****Pd (3 counts)**

- 3.6×1012 238U86+ beam
-    (4x107 s-1, -1day)
-         - 10-5 of the goal

*June 2007*

## Recent Achievements and Commissioning Runs at BigRIPS

- Dec. 28th, 2006 	First beam from SRC
- 	      27Al10+ at 345 MeV/u
- Mar. 13th, 2007 	First RI-beam production at BigRIPS
- 			     using 345*A* MeV 86Kr beam
- Mar. 24th		First 238U beam 345 MeV/u
- Mar. 27th		First RI-beam using U in-flight fission at RIBF
- May 16-Jun. 3  	238U ~ 0.03 pnA max
- 			New Isotope Search
- 	Optics / Detector performance, etc
- Jun. 29-Jul. 2		238U
- 			Detector tests (IC, NaI), etc
-  			Yield survey for 80Zn, 130Cd, etc

## BigRIPS and ZeroDegree spectrometer

- F7

- F5

- BigRIPS

- 1st stage
- Separation

**Production**
**Target**

- F1

- SRC

- IRC

- F2

- ZeroDegree

- F8

- F11

- F3

- 2nd stage
- Tagging/Further separation

- F12

- **  = +/- 40mr(h) 	50mr(v)
- *p  *= +/- 3%

- Large Acceptance
-          	Projectile fragmentation
- 	Projectile fission

## BigRIPS and ZeroDegree spectrometer

- F7

- F5

- BigRIPS

- 1st stage
- Separation

**Production**
**Target**

- F1

- SRC

- IRC

- F2

- F8

- F11

- F3

- 2nd stage
- Tagging/Further separation

- F12

- **  = +/- 40mr(h) 	50mr(v)
- *p  *= +/- 3%

- Large Acceptance
-          	Projectile fragmentation
- 	Projectile fission

## BigRIPS and ZeroDegree spectrometer

- F7

- F5

- BigRIPS

- 1st stage
- Separation

**Production**
**Target**

- F1

- SRC

- IRC

- F2

- F8

- F11

- F3

- 2nd stage
- Tagging/Further separation

- F12

- **  = +/- 40mr(h) 	50mr(v)
- *p  *= +/- 3%

- Large Acceptance
-          	Projectile fragmentation
- 	Projectile fission

## BigRIPS and ZeroDegree spectrometer

- F7

- F5

- BigRIPS

- 1st stage
- Separation

**Production**
**Target**

- F1

- SRC

- IRC

- F2

- Reaction Residue Tagging
- With ZeroDegree

- F8

- F11

- F3

- 2nd stage
- Tagging/Further separation

- F12

- **  = +/- 40mr(h) 	50mr(v)
- *p  *= +/- 3%

- Large Acceptance
-          	Projectile fragmentation
- 	Projectile fission

**

**Target**

##  spectroscopy with ZeroDegree

- High resolution
- Large maximum *B***

**

- PID: ZDS

## ZeroDegree Spectrometer

## γ

- ZeroDegree Spectrometer

**γ**

**F8**
**Target **
**position**

- ~3m

## ZeroDegree Spectrometer

## Target position of ZeroDegree/BigTOFspe(tentative name)

- 3010 mm

- 1950 mm

## Target position of ZeroDegree/BigTOFspe(tentative name)

- 3010 mm

- 1950 mm

**Target**
**+**
********detectors**

## 160 NaI(Tl) detectors

Each detector
4.5 x 8 x 16 (cm3)
 ΔE/E ~ 9% @ 662keV

Array
16 layers
6~14 detectors in each layer	

- 160 NaI(Tl) detectors
- Each detector
- 4.5 x 8 x 16 (cm3)
-  *Δ**E/E* ~ 9% @ 662keV
- Array
- 16 layers
- 6~14 detectors in each layer

- DALI2

## DALI 

  160 NaI(Tl) detectors
      Efficiency :  		17% (FWHM) 
      E resolution: 	150keV 
	         (@ 1MeV, β~0.3)

- DALI
-   160 NaI(Tl) detectors
-       Efficiency :  		17% (FWHM)
-       E resolution: 	150keV
- 	         (@ 1MeV, *β*~0.3)

- γ-detector array

-  GRAPE --- 18 Ge detectors
-  	S. Shimoura, E. Ideguchi(CNS)
-     Efficiency 		5%
-     Pos. resolution	2mm
-     E resolution 		10keV
-                       (@2.1MeV, *β** *=0.3)

## DALI 

  160 NaI(Tl) detectors
      Efficiency :  		18% (FWHM) 
      E resolution: 	100keV 
	         (@ 2.1MeV, β~0.6)

- DALI
-   160 NaI(Tl) detectors
-       Efficiency :  		18% (FWHM)
-       E resolution: 	100keV
- 	         (@ 2.1MeV, *β*~0.6)

- γ-detector array

-  GRAPE --- 18 Ge detectors
-  	S. Shimoura, E. Ideguchi(CNS)
-     Efficiency 		3%
-     Pos. resolution	2mm
-     E resolution 		40keV
-                       (@1MeV, *β** *=0.6)

## DALI vs GRAPE

|  | GRAPE | DALI2 |
| --- | --- | --- |
| E (FWHM@1MeV) | 25 keV | 100 keV |
| (@1MeV) | 3 % | 18 % |
| FOM@ 1 MeV
(sqrt()/E) | ~ 7 | ~ 4 |
| Peak/Total | Small | Large |
| Good for | Low E  (<1MeV)
Odd mass Rotational etc. | High E (>0.5MeV)
- |

## 160 NaI(Tl) detectors
   Each detector
4.5 x 8 x 16 (cm3)
 ΔE/E ~ 9% @ 662keV
   Array
16 layers
6~14 detectors in each layer	

- 160 NaI(Tl) detectors
-    Each detector
- 4.5 x 8 x 16 (cm3)
-  *Δ**E/E* ~ 9% @ 662keV
-    Array
- 16 layers
- 6~14 detectors in each layer

- DALI2 (**Detector Array for Low Intensity radiation 2**)

## CNS GRAPE (Gamma-Ray detector Array with Energy and Position sensitivity) 

- CNS, Univ. Tokyo --- S. Shimoura, E. Ideguchi *et al*.
- 	Efficiency 	5%	(4%; achieved)
- 	Pos. resolution	2mm 	(5mm; achieved)
- 	E resolution 	10keV 	(16keV @ 2.1MeV, *β** *=0.3; achieved)

## BigRIPS and ZeroDegree spectrometer

- F7

- F5

- BigRIPS

- 1st stage
- Separation

**Production**
**Target**

- F1

- SRC

- IRC

- F2

- F8

- F11

- F3

- 2nd stage
- Tagging/Further separation

- F12

- **  = +/- 40mr(h) 	50mr(v)
- *p  *= +/- 3%

- Large Acceptance
-          	Projectile fragmentation
- 	Projectile fission

- SHARAQ

##  spectroscopy with SHARAQ*

- Very high resolution
- (Relatively small *p *acceptance)

- PID, mom. Analysis
- : SHARAQ

**

- * SHARAQ is being developed by
-   ICHOR project, Univ. of Tokyo

## Sufficient  PID resolution for A≤100
High “particle species” acceptance (good for cocktail beam) 

- High “particle species” acceptance (good for cocktail beam)

**

- PID: BigTOF

***A/A ~ 1%*

** spectroscopy with BigTOF  (Tentative name...)

## Layout of RIKEN RI beam factory (RIBF) in 2007

- ZeroDegree

- (old)

- fRC

- IRC

- SRC

- RRC

- RILAC

- RIPS

- RARF

- ZeroDegree

- BigRIPS

## use of RIPS with IRC beam

- Spin polarized RI beam
- 	IRC-based production
- 	nuclear moment
- 	condensed matter physics

- RI spin lab.

- Beam line

- RIPS

- IRC

- target

- Pol. RI
- beam

*Phase 2*

*use of RIPS with IRC beam*

*H. Ueno et al*

- 			Performance of
- 				Primary and
- 				Secondary Beams

## Performance of RIBF

- p~U
-   345 MeV/u
-   1 pA  (goal)

- 345 MeV/nucleon

## Performance of RIBF

- p~U
-   345 MeV/u
-   1 pA (6x1012 /sec)
-     (goal)

- Projectile fragmentation
- In-flight fission of U

- 345 MeV/nucleon

## 86Kr34+

- 86Kr34+

-  30 pnA

- 238U86+

-  0.04 pnA

- 345 MeV/u

- 345 MeV/u

- Achieved

- Achieved

## A/Q

- 3.6×1012 238U86+ beam
-    (4x107 s-1, -1day)
-         - 10-5 of the goal

*June 2007*

- δA/Q) = 0.05% (AZr, at 1σ)

*A/Q*

**Pd**

## A/Q

*A/Q*

*Z*

- Identification from *B*ρ*, TOF, *Δ*E, E*
- with an empirical matrix for optics

- δA/Q) = 0.05% (AZr, at 1σ)

*A/Q*

**122****Pd**

**123****Pd**

**124****Pd**

**125****Pd (27 counts)**

- 122Pd45+

- 121Pd45+

- 120Pd45+

- 119Pd45+

- 123Pd45+

**126****Pd (3 counts)**

- 3.6×1012 238U86+ beam
-    (4x107 s-1, -1day)
-         - 10-5 of the goal

*June 2007*

## 86Kr34+

- 86Kr34+

-  30 pnA

- 238U86+

-  0.04 pnA

- 345 MeV/u

- 345 MeV/u

- 10 pnA

*feasible in coming year*

- Achieved

- Achieved

- ~100 pnA

*feasible in coming year*

## 86Kr34+

- 86Kr34+

-  30 pnA

- 238U86+

-  0.04 pnA

- 345 MeV/u

- 345 MeV/u

- 10 pnA

- 1 pμA

*feasible in coming year*

*need more investigation, investment*

- Achieved

- Achieved

- ~100 pnA

*feasible in coming year*

## 86Kr34+

- 86Kr34+

-  1.1 eμA (30 pnA)

- 238U86+

-  ~5 enA (0.04 pnA)

- 345 MeV/u

- 345 MeV/u

- Tuning of Accelerators, BT
- Flat-Top operation
- Stripper,
- New Injector, New IS

- εtrans

- <3% (~50%)5

- εstripper (RRC-SRC)

- <5% (15% * 30%)

- IRRC

- ~15 pnA

- Nov. 10th

- Jun. 29th

- 10 pnA U

- 1 pμA U

*feasible in coming year*

*need more investigation, investment*

*x100*

## Injector system dedicated for RIBF

- Independent operations
- of RILAC-GARIS (SHE, ..)
- and RIBF

- new injector

- U35+

- U71+

- U86+

## Estimation of RI-beam intensities @BigRIPS

- 5

- 4

- 2

- 1

- 6

- 1: 86Kr+Be
- 2: 136Xe+Be
- 4: U+Pb fission
- 5: U+Be Frag
- 6: U+Be fission

- Expected RI-beam intensities 78Ni    ~10 pps     (238U)   132Sn  ~107 pps     (238U)   100Sn  ~1 pps       (124Xe)
-  I(primary beam) = 1 pμΑ.

- Estimation based on the GSI data and the ABLABRA and EPAX2 formula

- Courtesy of T. Suda

## Estimated beam intensity at BigRIPS 

- Spiral2

*Estimated beam intensity at BigRIPS *

- 86Kr/136Xe/238U  1pμA

- Calculation uses
- 86Kr + Be	Fragmentation		EPAX2
- 136Xe + Be	Fragmentation		EPAX2
- 238U + Be	Fragmentation		EPAX2
- 			Fission		DATA@GSI (limited)
- 238U + Pb	Fragmentation		EPAX2
- 			Fission		ABLABRA

*r*-process

- 86Kr/136Xe/238U  1pμA

## Estimated beam intensity at BigRIPS 

- Spiral2

*Estimated beam intensity at BigRIPS *

- 86Kr/136Xe/238U  1pμA

- Calculation uses
- 86Kr + Be	Fragmentation		EPAX2
- 136Xe + Be	Fragmentation		EPAX2
- 238U + Be	Fragmentation		EPAX2
- 			Fission		DATA@GSI (limited)
- 238U + Pb	Fragmentation		EPAX2
- 			Fission		ABLABRA

*r*-process

- 86Kr/136Xe/238U  1pμA

- Expected RI-beam intensities 78Ni    ~10 pps     (238U)   132Sn  ~107 pps     (238U)   100Sn  ~1 pps       (124Xe)
-  I(primary beam) = 1 pμΑ.

- 1

## at present:

*   **T**1/2      *: up to 78Ni
*   **E*(2+) : up to 76Ni
*   **B*(E2): up to 70Ni

- 78Ni

**(goal)**

## at present:

*   **T**1/2      *: up to 78Ni
*   **E*(2+) : up to 76Ni
*   **B*(E2): up to 70Ni

- 1cps/10pnA

- 78Ni

**(goal)**

## at present:

*   **T**1/2      *: up to 78Ni
*   **E*(2+) : up to 76Ni
*   **B*(E2): up to 70Ni

- 1cps/10pnA

***E******x*****(2****+****)**

***B*****(E2)**

- 78Ni

- 76Ni

**(goal)**

- 132Sn

- 1cps/10pnA

- 130Cd

- 129Ag

***B*****(E2)**

***E******x*****(2****+****)**

- 1cps/10pnA

- 109Zr

- 1cps/10pnA

- 109Zr

***E******x*****(2****+****),*****B*****(E2)**

## Use of RIPS

- 	LINIAC + RRC
- 		86Kr 	80pnA@63AMeV
- 		70Zn 	150pnA@63AMeV
- Lower energy
- Higher intensity
- No magnetic spectrometer for reaction residue

## Layout of RIKEN RI beam factory (RIBF) in 2007

- ZeroDegree

- (old)

- fRC

- IRC

- SRC

- RRC

- RILAC

- RIPS

- RARF

- ZeroDegree

- BigRIPS

## Layout of RIKEN RI beam factory (RIBF) in 2007

- ZeroDegree

- (old)

- fRC

- IRC

- SRC

- RRC

- RILAC

- RIPS

- RARF

- ZeroDegree

- BigRIPS

## Use of RIPS

- 	LINIAC + RRC
- 		86Kr 	80pnA@63AMeV
- 		70Zn 	150pnA@63AMeV
- 	LINAC  + RRC + (fRC) + IRC
- 		<Pb	~100pnA@115AMeV
- 			1pμA@115AMeV  (goal)
- Lower energy
- Higher intensity
- No magnetic spectrometer for reaction residue

## Phase-II construction 2007-2010

**SAMURAI - large acceptance**
**      ****Kobayashi et al.**

**SHARAQ - high resolution**
**   ****Shimoura et al.**

**Rare RI Ring – mass**
**  ****Ozawa et al.**

**SCRIT - e-RI collision**
**   ****Wakasugi, Suda et al.**

**SLOWRI- slow beams**
**    ****Wada et al.**

- To maximize the potentials of intense RI beams available at RIBF

**RI Spin Lab. at RIPS –pol. RI beam  Ueno et al.**

** ****http://rarfaxp.riken.go.jp/RIBF-TAC05/**

## Expected beam list in 2007-2008 

- http://ribfwww.riken.go.jp/exp/pre/accelerator/concept.html

- 2 pnA =   1.2 x 1010 particles/sec

-  The construction project of a new injector linac with a new superconducting 28-GHz ECR ion source is beginning, aiming at upgrading the intensity.

- Expected beam list in 2007-2008

## First observation of in-flight fission at BigRIPS

- Z=39

- Z=40

- Z=50

- 2007/3/27: T.Kubo, T. Ohnishi, and
-     BigRIPS Commissioning team

- 238U + Be @ 345AMeV

- PID using
-   tagging section

## BigRIPS first-stage 

- Courtesy of S. Bishop (left) & A. Saito (right),  Oct. 2, 2006

- BigRIPS first-stage

## BigRIPS second-stage 

- BigRIPS second-stage

## Zero-degree spectrometer 

- Zero-degree spectrometer

- particle ID / momentum analysis
-     e.g. Doppler shifted γ-ray measurements
- 	with identification of products
- 	(angle-integrated cross section)

- 132Sn

- From BigRIPS

-  γ-detector

- 132Sn

- 133Sn

- 131Sn

- GRAPE (Ge)

- Commissioning  in early 2008FY

- Ejectile PID

- p/dp = 2000 ~  4000
- pacc  = ±3%

*H. Sakurai et al*

- DALI2 (NaI)

## SHARAQ

- SRC

- beam line (dispersion matching)

- (CNS)

- High-resolution spectrometer
- with dispersion-matched beam line
- 	RI beam as probes
- 		e.g. double charge exchange

- Bρ = 6.8 Tm
- p/dp ~15000 (1mm obj)
- Ω=4.6 msr,  dp=±1%

*S. Shimoura et al*

- swing

## SHARAQ construction

- Magnets installed in 2007
- Dispersive BT  in 2008
- Commissioning in 2008?

*dispersive BT line*

*sc-QQ*

*sc-QQ*

## at present:

*   **T**1/2      *: up to 78Ni
*   **E*(2+) : up to 76Ni
*   **B*(E2): up to 70Ni
-       # **2(pp’) for 74Ni

## 78Ni

- 78Ni

- (EPAX2)

- (EPAX2)

- (ABLABRA)

- (GSI data)

## 78Ni

- 78Ni

## 54Ca

- 54Ca

- 56Ca

## 64Cr

- 64Cr

- 62Ti

- ?

## 126Pd

- 126Pd

- ?

## 202Os

- 202Os

- 200W

- 198Hf

## 132Sn

- 132Sn

- 134Sn

- 136Sn

- 138Sn

- ?