The Alpha Magnetic Spectrometer on the International Space Station S. Ting
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The Alpha Magnetic Spectrometer on the International Space Station
S. Ting
USA
MIT - CAMBRIDGE
NASA JOHNSON SPACE CENTER
TEXAS A&M UNIVERSITY
UNIV. OF HAWAII
UNIV. OF MARYLAND - DEPT OF PHYSICS
YALE UNIVERSITY - NEW HAVEN
MEXICO
UNAM
FINLAND
HELSINKI UNIV.
UNIV. OF TURKU
FRANCE GAM MONTPELLIER
LAPP ANNECY
LPSC GRENOBLE
GERMANY
RWTH-I
RWTH-III
MAX-PLANK INST.
UNIV. OF KARLSRUHE
ITALY
ASI
CARSO TRIESTE
IROE FLORENCE
INFN & UNIV. OF BOLOGNA
INFN & UNIV. OF MILANO
INFN & UNIV. OF PERUGIA
INFN & UNIV. OF PISA
INFN & UNIV. OF ROMA
INFN & UNIV. OF SIENA
NETHERLANDS
ESA-ESTEC
NIKHEF
NLR
ROMANIA ISS UNIV. OF BUCHAREST
RUSSIA
I.K.I.
ITEP
KURCHATOV INST.
MOSCOW STATE UNIV.
SPAIN
CIEMAT - MADRID
I.A.C. CANARIAS.
SWITZERLAND
ETH-ZURICH
UNIV. OF GENEVA
CHINA BISEE (Beijing)
IEE (Beijing)
IHEP (Beijing)
NLAA (Beijing)
SJTU (Shanghai)
SEU (Nanjing)
SYSU (Guangzhou)
SDU (Jinan)
KOREA
EWHA
KYUNGPOOK NAT.UNIV.
PORTUGAL
LAB. OF INSTRUM. LISBON
ACAD. SINICA (Taiwan)
AIDC (Taiwan)
CSIST (Taiwan)
NCU (Chung Li)
NCKU (Tainan)
NCTU (Hsinchu)
NSPO (Hsinchu)
TAIWAN
AMS: a U.S. DOE sponsored international collaboration
TURKEY METU
DENMARK UNIV. OF AARHUS
Strong support from
NASA (D. Goldin, C. Bolden, L. Garver, G. Abbey, W. Gerstenmaier, M. Sistilli, T. Martin, K. Bollweg, …)
and DOE (J. Siegrist, M. Salamon, D.Kovar, S. Gonzalez, R. Staffin, J. O’Fallon, …)
16 Countries, 60 Institutes and 600 Physicists
New results from
the first 2 years of AMS
Scaled by R2.7 From 1 GV to 1.8 TV
New results from AMS 1) Proton flux
Proton flux Comparison with past measurements
AMS-02 Data
Pamela Data
Rigidity (GV)
Search for structures
Proton flux
8 Rigidity (GV)
10210
310
2.7
X R
igid
ity
-1 H
e F
lux
(m
^2
sr
se
c G
V)
310
New Results from AMS 2) Helium spectrum , 2GV to 3TV
Helium flux
Comparison with past measurements
R (GV)
Helium flux
Search for structures
AMS-02 Data
Pamela Data
New results from AMS 3) Electron Spectrum , 1GeV to 500GeV
New results from AMS 4) Positron Spectrum, 1GeV to 350GeV
Energy (GeV)1 10
2103
10
3 E
´ -1
s s
r)2
Flu
x (
Ge
V m
50
100
150
200
250
300
New results from AMS 5) All Electron Spectrum, 0.5GeV to 700GeV
Energy (GeV)1 10
2103
10
3 E
´ -1
s s
r)2
Flu
x (
Ge
V m
0
50
100
150
200
250
300
350
400AMS-02ATIC01&02 (2001 & 2003)BETS04 (2004)BETS97&98 (1997 & 1998)CAPRICE94 (1994)Fermi-LAT (2009)HEAT94 (1994)HEAT94&95 (1994 & 1995)HEAT95 (1995)H.E.S.S. (2004 -2007)H.E.S.S. (LE) (2004 & 2005)
(Electron plus Positron) Spectrum
Energy (GeV)1 10
2103
10
3 E
´ -1
s s
r)2
Flu
x (
Ge
V m
0
50
100
150
200
250
300
350
400AMS-02
ATIC01&02 (2001 & 2003)
BETS04 (2004)
Fermi-LAT (2009)
H.E.S.S. (2004 -2007)
H.E.S.S. (LE) (2004 & 2005)
(Electron plus Positron) Spectrum comparison with recent measurements
Precise measurement of the energy spectra of B/C provides information on Cosmic Ray Interactions and Propagation
New results from AMS 6) Boron-to-Carbon ratio, 5GV to 500GV
Tra
cke
r
1
2
7-8
3-4
9
5-6
1. Tracker Plane 1
6. RICH
AMS: Multiple Independent Measurements
of the Charge (|Z|)
4. Tracker Planes 2-8
7. Tracker Plane 9
2. TRD
3. Upper TOF (1 counter)
5. Lower TOF (1 counter)
Carbon (Z=6) ΔZ (cu)
0.30
0.12
0.32
0.30
0.33
0.16
0.16
ZTOF_LOW=5.2
ZTRK_IN=4.8
ZRICH=5.1
ZTRK_L1=6.1
ZTRD=6.0
Z0=9.9
Z1=5.3
front
view
Carbon
Fragmentation
to Boron
R = 10.6 GV
B/C
Ra
tio
10% of total expected data
Boron-to-Carbon ratio
10% of total expected data
B/C
Ra
tio
Boron-to-Carbon ratio
comparison with recent data
10% of total expected data
Boron-to-Carbon ratio
New results from AMS 7) Positron ratio anisotropy (update)
July 8th, 2013
The fluctuations of the positron ratio e+/e− are isotropic
Sig
nif
ica
nc
e (
)
New results from AMS ICRC2013: On the origin of excess positrons
If the excess has a particle physics origin, it should be isotropic
Galactic
coordinates (b,l)
On the origin of excess positrons
Limits on the amplitude of a dipole anisotropy in
any axis in galactic coordinates
on the positron to electron ratio
δ ≤ 0.030 at the 95% confidence level
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