first experiments with the polarized internal gas target (pit) at anke/cosy

First Experiments with the Polarized Internal Gas Target (PIT)

at ANKECOSY

Ralf Engels for the ANKE-Collaboration

Institut fuumlr Kernphysik Forschungszentrum Juumllich

Brookhaven

September 14 2007

September 14 2007 Ralf Engels 2

Outline

Introduction PIT installation

Setup overview Transfer to COSY hall and installation at ANKE

PIT commissioning Stray fields at ANKE Cell tests at ANKE Target commissioning Results

Plans for the future


bull internal experiments ndash with the circulating beam bull external experiments ndash with the extracted beam

p p d dwith momenta up to 37 GeVc

COSY ndash COoler SYnchrotron


ANKE at COSY

Targetsbull Solid stripbull Cluster jetbull Polarized internal target PIT ( storage cell or jet )

Magnetsbull D2 ndash spectrometer magnetbull D1 D3 ndash beam bending magnets

Detector systemsbull Positive amp Negativebull Forward amp Backwardbull Spectator Detectors

Spectrometer ANKE


PIT at ANKE

3D CAD drawing of PIT at ANKE

Storage cellPolarimeter

ABS

Technical constraints

bull Target exchange within a maintenance week

bull New support bridge following the movement of D2 magnet

bull Magnetic shielding of componentsbull of the Atomic Beam Source (ABS)bull (D2 Magnet 16 Tesla)


Polarized Internal Gas Target

Main parts of a PITbull Atomic Beam Source

bull Target gas

hydrogen or deuteriumbull H beam intensity (2 hyperfine states)

76 1016 atoms sbull Beam size at the interaction point

σ = 285 plusmn 042 mmbull Polarization for hydrogen atoms

PZ = 089 plusmn 001

PZ = -096 plusmn 001

bull Lamb-Shift Polarimeterbull Target chamber with Storage Cell

ABS and LSP at the laboratory


The Lamb-shift Polarimeter


The Molecules in the ABS jet

I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)


ABS and LSP in the COSY hall

December 2004 ndash transfer to COSY hall (outside of the COSY tunnel)

May 2005 ndash tests after reassembling

Setup in the COSY hall

bull Supports representing

D1 and D2

bull New support bridge

bull Platform for all electronic and supply components

bull Heat exchanger with closed cooling-water circuit

June 2005 ndash setup ready

for installation at ANKE


PIT installation at ANKE

Platform transportationABS transportation


PIT at ANKE


Magnetic stray field of D2

PIT setup with shielded components at ANKE

x

y

z

90150135

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calculated field strength (G)measured field strength (G)permissible field strength for the device given by the producer (G)


Test of the medium-field rf transition unit

0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar

H beam OFF H beam ON states 1 + 2 H beam ON state 1 only

30

25

20

15

10

05

00

field strength in the D2 gap0 T 158 T

0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam

MFT off (HFS 1 and 2)

MFT on (HFS 1 only)


Do we have a zero field crossing

Magnetic field scan with ANKE at 53ordm using a 3D Hallprobe (Gatchina)

Bx By By |B|

Magnetic field along ABS axisbullID2=563 A (~ 06 T)

bullID1D3=129484 A

1 Determine the local Larmor precession frequency ωL

2 The angular velocity of the magnetic field ωB

As long as the ratio R=ωLωB is large the spin of the atom follows the field directionrarr no depolarization due to zero crossings

ωL

R=ωLωB

ωB


Tuning of the Transition Units

Supporting bridge betweenD1 and D2

Additional shielding fromthe D2 stray fields

Cryopump at the target chamber

Polarimeter ionizer underthe target chamber


First Polarization Measurement with the LSP

Problems

- The magnetic stray field of the D2 magnet deflected the produced protons

- The quantization axis was rotated by the stray field and the LSP measures

only the projection on the horizontal beam line

Next time More shielding and a rotatable Wien filter to compensate the

misalignment of the polarization axis

WFT was tuned online at the ANKE target position near the D2 magnet

The measured asymetry was stable during the beam time


37middot10-840middot10-9With catcher

30middot10-740middot10-9Without catcher

With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm

Measured pressures in the target chamber mbar

AB

S-j

et d

ensi

ty c

m-3

integral thickness ~ 15 1011 cm-2

ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam

XY-table Frame with storage cell and aperture

Target chamber

Feeding tube l = 120 mm Oslash = 10 mm

Extraction tube l = 230 mm Oslash = 10 mm

Beam tube l = 400 mm 20x20 mm2

400mm400mm


The COSY beam size

at injection

with an accelerated beam

no target with cluster target(density ~ 1014 atcm2)

9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2


Storage cell Final setup for the 1 Experiment

Tools for the experiment New storage cell amp support

(20bull20bull390 mm)

gt high target density gt unpolarized gas feeding system

LSP below the target chamber

gt online measurement of the ABS beam polarization

Silicon Tracking Telescope (STT)

gt measurement of spectator protonsnearby the storage cell center


Cooler stacking with the storage cell

28 stacks followed by bull 2s electron cooling bull after 58s acceleration toTp=600 MeV

Cooler Stacking allows for higher polarized beam intensities with cell

Without storage cell 25middot1010 ions were reached


Results of the cell tests

single injection 3557empty cell

26no cell80 stacking +

electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE

30 stacking + electron cooling

83

number of stored protons 10 9

2030 stacking +

electron cooling

1421single injection

injection type

30 stacking + electron cooling92ordm

cell with H gas from ABS

empty cell

64

6

9


Storage cell and stochastically cooled beam

Cooling off

Cooling on

Tp= 831 MeV


First Experimental Beam Time

Stacking rarr 120 injection with 10 s e-coolingFlat top rarr 30 min to have about 60 duty time

0 20 50Time min




0 20 50Time min

Switching on the gasto feed the storage cell

Acceleration withoutgas in the storage cell

7 109 polarized deuterons in the ring with gas in the target


Td=12 GeV target H (N2) gas

dprarrdp

dp rarr rarr

First Double Polarized Experiment dp dp rarr rarr




dprarr(dpsp) πo

quasi-free nprarrd

πo

(High amp Low branch)

High branch

Low branch

dp rarr rarr


First Polarization Measurement of the Target

ANKE

preliminary

dp Td=12 GeV polarized H gas

quasi-free nprarrd

πo


ltQygt = 075 plusmn 006

θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

(High and low branch)



Summary of commissioning and first experiment

1 Cell-target thickness for H (hyperfine state 1) ~ 2 middot 1013 cm-2

3 ABS jet-target thickness ~ 15 middot 1011 cm-2

bull Tests at ANKE with ABS and storage cell

with stacking injection (Nov 2005) and stochastic cooling (Mar 2006)

2 Average luminosity for the storage-cell test ~ 1 middot 1029 cm-2 s-1

4 Hydrogen polarization in the cell ~ 079 +- 007

bull First experiment dprarrppn - JanFeb 2007rarrrarr



December 07 ndash PIT reinstallation With rotatable Wien filter and

better shielding of the LSP

JanFeb rsquo08 ndash Next beam time d prarr (pp)n at 2435 ndash 37 GeVc

(5 Weeks)

March rsquo08 ndash PIT deinstallation

ABS and LSP can be used for other experiments

- ISTC project 1860 Nuclear Polarization in H2D

2 molecules

- Direct Measurements of the Hyperfine levels

in the 2S12

2P12

state rarr Breit-Rabi diagram

rarr rarr


Far Future Polarized Fusion

First Experiments with the Polarized Internal Gas Target (PIT) at ANKECOSY


Outline

Introduction PIT installation

Setup overview Transfer to COSY hall and installation at ANKE

PIT commissioning Stray fields at ANKE Cell tests at ANKE Target commissioning Results







ANKE at COSY




Spectrometer ANKE


PIT at ANKE



ABS








bull Target gas




PZ = 089 plusmn 001








I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)







D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr









ANKE at COSY




Spectrometer ANKE


PIT at ANKE



ABS








bull Target gas




PZ = 089 plusmn 001








I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)







D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr





PIT at ANKE



ABS








bull Target gas




PZ = 089 plusmn 001








I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)







D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







bull Target gas




PZ = 089 plusmn 001








I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)







D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr








I H 2

+

I H 2

+

+ c middot I p

= 0029 plusmn 0002

Engels et al RSI 76 053305 (2005)







D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr










D1 and D2










PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr








PIT at ANKE




x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







x

y

z

90150135

61530

302555

4026300

200550300

60100300

303355




0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr






0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


0 0 E + 0 0

5 0 E - 0 8

1 0 E - 0 7

1 5 E - 0 7

2 0 E - 0 7

2 5 E - 0 7

3 0 E - 0 7

0 200 400 600 800 1000 1200 1400D2 current A

Pre

ssu

re i

n t

he

targ

et c

ham

ber

e-7

mb

ar


30

25

20

15

10

05

00


no ABS beam


MFT on (HFS 1 only)




Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







Bx By By |B|


bullID1D3=129484 A




ωL

R=ωLωB

ωB









Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr












Problems











With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







With

ABS jet

Without

ABS jet

ABS beam catcher

~13cm~13cm


AB

S-j

et d

ensi

ty c

m-3


ABS jet

COSY Beam

The ABS jet target


Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr





Storage cell setup

COSYbeam


Target chamber




400mm400mm


The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr





The COSY beam size

at injection



9x12 mm 16x15 mm

36x16 mm

15 x 15 mm2



















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr






















electron cooling

flattop

(600 MeV)after

coolinginjection

empty cell

no cell

target

92ordm

0ordm

ΘANKE


83


2030 stacking +

electron cooling


injection type



empty cell

64

6

9



Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr






Cooling off

Cooling on

Tp= 831 MeV




0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







0 20 50Time min




0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







0 20 50Time min






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr






dprarrdp

dp rarr rarr





dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr







dprarr(dpsp) πo

quasi-free nprarrd

πo


High branch

Low branch

dp rarr rarr



ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr






ANKE

preliminary


quasi-free nprarrd

πo



θd=50-150 θd=150-220 θd=220-280 θd=280-400

θd=1550-1650 θd=1650-1700 θd=1700-1770

rarr

quasi-free

np rarr dπ0

















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr


















(5 Weeks)




2 molecules


in the 2S12

2P12


rarr rarr




first experiments with the polarized internal gas target (pit) at anke/cosy

Documents

bmagnetic field

field crossing

field direction

magnetic field b

magnetic field scan

d3 beam

anke target position

deuterium h beam intensity