shiptrap: the penning trap spectrometer at gsi ana martin
DESCRIPTION
SHIPTRAP: the Penning trap spectrometer at GSI Ana Martin. stopping. cooling, accumulation. Gas. Cell. purification. measurement. Extraction. RFQ. Buncher. Measurement. Transfer section. Trap. Purification. Trap. Detector. SHIPTRAP = SHIP + TRAP + …. - PowerPoint PPT PresentationTRANSCRIPT
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