JINA 2007, Ana Martin 1

SHIPTRAP: the Penning trap SHIPTRAP: the Penning trap spectrometer at GSIspectrometer at GSI

Ana Martin

JINA 2007, Ana Martin 2

SHIPTRAP = SHIP + TRAP + …SHIPTRAP = SHIP + TRAP + …

target wheel

beam dump

primary beam, 3-4 Mev/u

SHIPTRAP = Precision experiments with fusion-evaporation reaction

products at low energy behind SHIP using ion traps

Purification Trap

Measurement Trap

Detector

ExtractionRFQ

GasCell

Buncher

purification

cooling, accumulation

stopping

measurement

Transfer section

JINA 2007, Ana Martin 3

Ion Motion in a Penning TrapIon Motion in a Penning Trap

Axial motion: oscillation in E-field

Magnetron motion: E x B drift

Reduced cyclotron motion:

242

22zcc

242

22zcc

20

md

qVz

Bm

qc

magnetron motioncyclotron motion

axial motion

Ф0

B

JINA 2007, Ana Martin 4

Double system Penning trapDouble system Penning trap

32 mm

212 mm

185 mm

Pumping barrier

Purification Trap

EMeasurement Trap

Diaphragm

buffer gas cooling mass selective

(isobaric purification)

732350 732400 732450 732500

0

10

20

30

40

50

60

147Tb+

147Dy+

147Ho+

No. of counts

/ b

in

Excitation frequency / Hz

147Er+

precision mass measurement via the determination of the ion

cyclotron frequency

TOF-ICR = Time-of-flight Ion Cyclotron Resonance

cion ν 2π

eΒm

94

96

98

100

102

104

106

108

110

112

114

116

-5 -3 -1 1 3 5

excitation frequency - 969998.7 Hz

mea

n T

OF

(us)

111Te+

600ms

JINA 2007, Ana Martin 5

0 1 23 4

5 6

7 8

9 10

11 12 13

14

15 16

17 18 19 20

21 22

23 24

25 26 27 28

29 30

31 32

33 34 35 36

37 38 39 4041

42 43 44

45 46 47 48

49 5051 52

5354 55

56

57 58

59

H (1)H e (2 )L i (3 )

B e (4 ) B (5 ) C (6 ) N (7 )

O (8) F (9)

N e (10)N a (11)

M g (12)A l (13)S i (14) P (15)

S (16)C l (17)

A r (18) K (19)

C a (20)S c (21)

Ti (22) V (23)

C r (24)M n (25)

Fe (26)C o (27)

N i (28)C u (29)

Zn (30)G a (31)

G e (32)A s (33)

S e (34)B r (35)K r (36)R b (37)

S r (38) Y (39)

Z r (40)N b (41)

M o (42)Tc (43)

R u (44)R h (45)P d (46)A g (47)

C d (48)In (49)

S n (50)S b (51)

Te (52) I (53)

X e (54)

50Cr+58Ni→108Te* @ 3.6 MeV/u - 4.0 MeV/u

58Ni+58Ni→116Ba* @ 4.0 MeV/u

Precision mass measurements are important for rp-process calculations

Mass measurements in the rp-Mass measurements in the rp-process end point regionprocess end point region

The Sn-Sb-Te cycle

1 0 4S b 1 0 5S b 1 0 6 1 0 7S b

1 0 3S n 1 0 4S n 1 0 5S n 1 0 6S n

1 0 5Te 1 0 6Te 1 0 7Te 1 0 8Te

1 0 2In 1 0 3In 1 0 4In 1 0 5In

(,a )

S b

(p , )

40Ca+58Ni→98Cd* @ 5.0 MeV/u

JINA 2007, Ana Martin 6

SHIPTRAP collaboratorsSHIPTRAP collaborators

GSI / SHIPTRAP

M. Block

D. Beck

M. Dworschak

S. Eliseev

F. Herfurth

H.-J. Kluge

A. Martín

W. Quint

C. Rauth

G. Vorobjev

GSI / SHIP

D. Ackermann

F. P. Heßberger

S. Hofmann

M. Mazzocco

Greifswald

A. Chaudhuri

G. Marx

L. Schweikhard

Mainz

K. Blaum

R. Ferrer

J. Ketelaer

C. Weber

H. Backe

P. Kunz

W. Lauth

Giessen

M. Petrick

C. Scheidenberger

W.R. Plaß

Munich

D. Habs

J. Neumayr

M. Sewtz

P. Thirolf

Veterans:

D. Rodríguez, M. Mukherjee, S. Rahaman, ...

St. Petersburg

Y. Novikov