JASMIN (T972) pbar Experiments Concrete Cap(CC), Air Gap(AG), Target(TG),

Filler Plate (FP), Duct Streaming (ST), and Gas Experiment (GE)

Purpose

To obtain experimental data for neutronsgenerated by high energy proton Interaction in matter (Ep>100 GeV)

• Nuclear reaction mechanism• Simulation code test • Radiation shielding and activation

Experiment at AP0

Cross Sectional View of AP0

• Neutron spectra and position distribution• Foil activation method

- Samples: Aluminum, Copper, Bismuth, etc.- Position: AG, CC(2007,2008) FP, TG, ST(2008)

CC

TG

FP

AG

Filler Plate

Air gap

Duct Streaming

Target with Be cover

Target samples

Sample installation/retrieval schedule

• All pbar samples installed during SD w/b 10/6/08

• Samples retrieved:– Concrete Cap 10/14/08– Air gap 10/15/08– Target 10/17/08 (required 4 hr cooldown & 4 hr access)– Filler plate 10/17/08– Duct streaming 10/17/08– Remaining air gap samples (10/25/08)

• Gas experiment samples are collected during stacking operations (ongoing)

- 200 - 100 0 100 200 30010- 37

1x10- 36

1x10- 35

1x10- 34

reac

tion

rat

e[re

acti

on/a

tom

/pro

ton]

position[cm]

27Al(n,α )24Na 209Bi(n,5n)205Bi

209Bi(n,7n)203Bi 209Bi(n,4n)206Bi

209Bi(n,6n)204Bi 115In(n,n')115mIn

- 200 - 100 0 100 200 30010- 38

1x10- 37

10- 36

1x10- 35

reac

tion

rat

e[re

acti

on/a

tom

/pro

ton]

position[cm]

natCu(n,x)58Co natCu(n,x)59Fe

natCu(n,x)57Co natCu(n,x)52Mn

natCu(n,x)56Co natCu(n,x)54Mn

CC01

CC02CC03 CC04

CC01

CC02CC03 CC04

- 150 - 100 - 50 0 50 100 150 20010- 37

1x10- 36

1x10- 35

1x10- 34

10- 33

reac

tion

rat

e[re

acti

on/a

tom

/pro

ton]

position[cm]

27Al(n,α )24Na

27Al(n,x)22Na

natCu(n,x)58Co

- 150 - 100 - 50 0 50 100 150 20010- 36

1x10- 35

10- 34

1x10- 33

reac

tion

rat

e[re

acti

on/a

tom

/pro

ton]

position[cm]

209Bi(n,7n)203Bi 209Bi(n,5n)205Bi

209Bi(n,6n)204Bi 209Bi(n,4n)206Bi

AG01

AG02

AG03AG04 AG05

AG01

AG02

AG03AG04 AG05

Spatial distribution measurement of reaction rate of activation samplesResults(CC and AG) for 2007 exp.

Calculation Results (AG)

3

-150 -100 -50 0 50 100 150 200 25010-36

10-35

10-34

10-33

10-32

Rea

ctio

n Ra

te

(Ta

rge

t nu

cle

us-1

pe

r pro

ton)

Position (cm)

-150 -100 -50 0 50 100 150 200 25010-37

10-36

10-35

10-34

10-33

Rea

ctio

n Ra

te

(Ta

rge

t nu

cle

us-1

pe

r pro

ton)

Position (cm)

27Al (n, ) 24Na

Expt.PHITSMARSMCNPX

-150 -100 -50 0 50 100 150 200 25010-36

10-35

10-34

10-33

10-32

Rea

ctio

n Ra

te

(Ta

rget nu

cle

us-1 p

er p

roto

n)

Position (cm)

209Bi (n, 4n) 206Bi

Expt.PHITSMARSMCNPX

209Bi (n, 6n) 204Bi

Expt.PHITSMARSMCNPX

10-1 100 101 102 10310-3

10-2

10-1

100

101

Neut

ron

Cro

ss S

ectio

n (b

arn

)

Neutron Energy (MeV)

Reaction Cross Section Data

115In(n,n’)

27Al(n,)

206Bi(n,4n)

206Bi(n,6n)

Reaction Cross Section Data

Pbar gas experimentObjective1. To compare radioactivity in target vault air under the different target configuration2. To look at sorbability onto particulate material.

PaperFilter

TeflonFilter

CharcoalFilter

AlkaliFilter

Pump

concrete

iron

target vault

Experimental Procedure1. Collecting gas component using filter stack.2. Gamma spectrometry.

Target configuration year of 2007 the target has NO Be shell year of 2008 the target has Be shell

Result

0 500 1000 1500 200010-6

10-5

10-4

10-3

10-2

10-1

7Be 24NaSpallation products

with NO Be shell (2007)

with Be shell (2008)

Energy (keV)

coun

t / s

/ 0

.5 k

eV

•No spallation products could be observed using the Be shell.•Be-7 and Na-24 could be produced from air. So, the 2 nuclides were observed regardless of Be shell.

Supplemental material

Mass distribution of the products

160 170 180 190 20010-38

10-37

10-36

10-35

10-34

10-33

10-32

Product mass number

Yie

lds

(1/a

tom

/pro

ton)

Au-196 (8.1 MeV)

Yb-169 (189.7 MeV)

Pt-188 (65.2 MeV)

Hf-175 (147.3 MeV)

Ir-189 (55.7 MeV)

Os-185 (82.9 MeV)Re-183 (95.2 MeV)

Lu-173 (164.1 MeV)Lu-171 (180.1 MeV)

Results(Au sample on AG) for 2007 exp.

Comparison between Exp. & Cal.

0

120GeV

N(En) x σ(Ep) dE

Yield (PHITS)

=

calculated(neutron)

experimental(proton)

160 170 180 190 20010-38

10-37

10-36

10-35

10-34

10-33

10-32

Product mass number

Yie

lds

(1/a

tom

/pro

ton)

0711FermiAir gap-GoldAu spallation

ExperimentalPHITS (Matsuda, first cal.)

Results(Au sample on AG) for 2007 exp.

Simplified Geometry

215

2-dimension （ R-Z ） Simplified Calculation Geometry

Real Geometry

Target

(Unit: cm)

(Unit: cm)

2

Calculation Analysis

-150 -100 -50 0 50 100 150 200 250 30010-38

10-37

10-36

10-35

10-34

Rea

ctio

n Ra

te

(Ta

rge

t nu

cle

us-1

pe

r pro

ton)

Position (cm)

-150 -100 -50 0 50 100 150 200 250 30010-37

10-36

10-35

10-34

10-33

Rea

ctio

n Ra

te

(Ta

rge

t nu

cle

us-1

pe

r pro

ton)

Position (cm)

-150 -100 -50 0 50 100 150 200 250 30010-37

10-36

10-35

10-34

10-33

Rea

ctio

n Ra

te

(Ta

rge

t nu

cle

us-1

pe

r pro

ton)

Position (cm)

-150 -100 -50 0 50 100 150 200 250 30010-37

10-36

10-35

10-34

10-33

Rea

ctio

n Ra

te

(Ta

rget nu

cle

us-1 p

er p

roto

n)

Position (cm)

27Al (n, ) 24Na

Expt.PHITS

MARSMCNPX

209Bi (n, 6n) 204Bi

Expt.PHITS

MARSMCNPX

209Bi (n, 4n) 206Bi

Expt.PHITS

MARSMCNPX

115In (n, n’)115mIn

Expt.PHITS

MARSMCNPX

4

Calculation Results (CC)