Atomic Physics Accelerator Facility at Darmstadt, Warsaw, November - - PowerPoint PPT Presentation
Polish German Meeting on the New International Atomic Physics Accelerator Facility at Darmstadt, Warsaw, November 24, 2003 Atomic Physics at the New International Accelerator Facility at GSI in Darmstadt Atomic Physics under Extreme
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Atomic Physics Atomic Physics at the New International Accelerator Facility at GSI in Darmstadt Atomic Physics under Extreme Conditions Andrzej Warczak
Jagiellonian University, Institute of Physics, Kraków, Poland
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Atomic Physics
ATOMIC PHYSICS WITH HIGHLY CHARGED IONS
LASER DEVELOPMENT & TECHNIQUES X-RAY SPECTROMETRS & DETECTORS REACTION SPECTROMETERS ION TRAP TECHNIQUES STORAGE RING TECHNIQUES COOLING TECHNIQUES
ATOMIC REACTIONS AND DYNAMICS ATOMIC SPECTROSCOPY NUCLEAR GROUND STATE PROPERTIES
ATOMIC PHYSICS WITH HIGHLY CHARGED IONS
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Static Fields
1 10 20 30 40 50 60 70 80 90 10
9
10
10
10
11
10
12
10
13
10
14
10
15
10
16
1s
<E> [V/cm] Nuclear Charge, Z
Z = 92
H-like Uranium EK = -132 • 103 eV <E>= 1.8 • 1016 V/cm Hydrogen EK = -13.6 eV <E>= 1 • 1010 V/cm
Z = 1
Strongest laser fields : 1022 W/cm2
2p3/2 2p1/2 2s1/2 1s1/2
Lyα1 (E1) Lyα2 (E1) M1 Lamb Shift
1 s
r
n d s t a t e : i n c r e a s e
t h e e l e c t r i c f i e l d s t r e n g t h b y s i x
d e r s
m a g n i t u d e
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
1990 1992 1994 1996 1998 2000 2002
420 430 440 450 460 470 480 490 500 510 520
Decelerated Ions: Cooler (our exp.)
Year Lamb Shift [eV]
U
91+
Gasjet Cooler
Decelerated Ions: Jet
Theory: 463,95 ± 1 eV
Experiment: 459.8 ± 4.8 eV
The recently achieved accuracy of 4.8 eV is a considerable improvement by a factor of 3 compared to the most precise value up to now.
U92+ from SIS ESR Experimental Storage Ring NESR New Experimental Storage Ring
The ground state Lamb shift in H-like uranium
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Towards an Accuracy of 1 eV Development of x-ray detection techniques
Segmented Ge(i) detectors
30 mm 52 mm 15mm
Transmission crystal spectrometer
GSI–Świerk-Grenoble–Kraków-Kielce-Frankfurt Calorimeters Micro-strip Ge(i) detectors and polarimeters Juelich-GSI–Świerk-Kraków-Kielce-Frankfurt Mainz-GSI Harvard-GSI
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Atomic Physics – Nuclear Physics
Giessen-GSI-Krakow
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Velocities Extreme Dynamic Fields
100meV 10eV 1keV 100GeV 1GeV 10MeV 100keV SIS300 HESR NESR ISR USR HITRAP
η=(γ-1)mc2/EBK=1
γ
100 1
E/u for U92+
10 2
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Velocities Lorentz Shifted (γ-boosted) Laser Cooling/ Spectroscopy
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Velocities
Precision Measurements of 2s Lamb Shift in Strong Fields of High-Z Li-like Ions
γ=23.9
0 =
Projectile frame excitation fluorescence
laser excitation 280.6 eV
1s2 2s1/2 1s2 2p1/2
eV
L
87 . 5 = ω h
Lab.System (laser)
fluorescence detection
fluorescence
eV
X
13384 = ω h
γ=23.9
The large Doppler shift allows us to use visible laser sources to excite transitions in the energy range up to 280 eV, e.g. 2s-2p transitions in lithium-like heavy ions
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Dynamic Fields
Weizsäcker-Williams (1934) E(t) N(ω) Quantization Fourier- Transform
50 500 500 1000
N(ω)
Photon - Field
[keV] [
ħω
Photoionization in strong virtual photon fields with I ≥ 1020 W/cm2
E=γZ/b2 t ≤ 0.1 as E(t)
A unique light source
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Extreme Dynamic Fields
Collision times in the sub-attosecond regime (10–22 s < t < 10–18s)
Positive Continuum Negative Energy Continuum
Transfer
Excitation Ionization Free Pair Production + mc
2
e+ e-
e+
Capture
e-
ECPP
High- γ
γ Z b2 ≈
E
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Photon-Matter Interaction in the Relativistic Regime
Photoionization
e
100 150 200 250 300 350 200 400
Lyα
1
K-REC 8
M-REC L-REC Lyβ Lyα
2
counts
photon energy (keV )
U92+ => N2, 358 MeV/u
Radiative Electron Capture
e
E KIN 8
E L E K
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
hω
E
hω´
⊥
6000 6500 7000 7500 8000 3 6 9 counts (arb. units) energy (channels)
I⊥ (∆E+hω´)
∆E
hω´
||
6000 6500 7000 7500 8000 3 6 9 counts (arb. units) energy (channels)
I⊥ (∆E+hω´) I(∆E+hω´)
2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 1 2 3 4 5 6 7 c o m p le te re la tiv is tic c a lc u la tio n s (E ic h le r e t a l.) n o n re la tiv is tic d ip o le d is trib u tio n la b o ra to ry fra m e U 92 += > N 2, 3 0 9 .7 M e V /uze ro d e g re e e m iss io n o f e le c tric ra d ia tio n b y e le c tro n c a p tu re in to s -o rb ita ls is fo rb id d e n b y a n g u la r m o m e n tu m c o n s e rv a tio n la w s ze ro d e g re e e m issio n : (α Z )
2 co rre c tio n to th e m a g n e tic e m issio n R ad iative C ap tu re in to th e K -S h elldσ/dΩ [arbitrary units]
m a g n e tic tra n s itio n s0.01 0.1 1 10 100 1000 1 10 100 adiabatisity parameter η cross section per target electron
σ(barn)
0.1 1 10 beam energy [GeV/u] (for Au
79+ ions)Photon-Matter Interaction in the Relativistic Regime
Total cross sections Angular distribution Polarization
Ge(i) Pixel Detector (FZ Jülich)
Frankfurt-GSI-Krakow-Kielce-Świerk Lanzhou-Argonne-Kassel-Berlin
Gas Jet target
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
The HITRAP Project at GSI
cooling trap experiments for slow particles experiments with particles at rest
U92+
post- decelerator EXPERIMENTS WITH HIGHLY-CHARGED IONS AT EXTREMELY LOW ENERGIES:
EXPERIMENTS WITH HIGHLY-CHARGED IONS AT EXTREMELY LOW ENERGIES:
11.4 MeV/u
U73+ SIS
stripper target
NESR
electron cooling and deceleration down to 4 MeV/u
U73+ U92+
4 M e V / u
EXPERIMENTS WITH HIGHLY-CHARGED IONS AT EXTREMELY LOW ENERGIES:
EXPERIMENTS WITH HIGHLY-CHARGED IONS AT EXTREMELY LOW ENERGIES:
The HITRAP project will be a part of FLAIR
The HITRAP project will be a part of FLAIR
UNILAC
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Antiproton Factory
SIS100/300 HESR NESR CR AP
New accelerator facility
Parameters: antiprotons up to 30 GeV, stored and cooled
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Ultra-Slow and Trapped Antiprotons
Positron Antiproton
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Ultra-Slow and Trapped Antiprotons
Polish – German Meeting
Accelerator Facility at Darmstadt, Warsaw, November 24, 2003
Atomic Physics
Atomic Physics Group, GSI, Darmstadt, Germany University of Frankfurt, Germany University of Dresden, Germany MPI Heidelberg, Germany University of Heidelberg, Germany University of Mainz, Germany University of Stockholm, Sweden Warsaw University, Warsaw, Poland Lebedev Institute, Moscow, Russia Jagiellonian University , Kraków, Poland Institute of Nuclear Physics, PAN, Kraków, Poland Kansas State University, Kansas, USA Institute of Nuclear Studies, Świerk, Poland Institute of Modern Physics, Lanzhou, China ANL, Argonne, USA Tbilisi State University, Tbilisi, Georgia HMI, Berlin, Germany Świętokrzyska Academy, Kielce, Poland University of Kassel, Germany University of St. Petersburg, Russia University of Giessen, Germany Fudan University, Shanghai, China, LBNL, Berkeley, USA University of Tokyo, Japan LLNL, Livermore, USA