. ( . using IR (2.1. . m) Radiation Source. . ). Gilad Marcus. The Department of Applied Physics. , . The Hebrew Universit. y, Jerusalem, Israel. . Tel Aviv, 2-4, December 2013. Acknowledgment. ID: 277426
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Presentations text content in keV HHG and Sub femtosecond K-shell excitation.
Slide1
keV
HHG and Sub femtosecond K-shell excitation. ( using IR (2.1m) Radiation Source )
Gilad MarcusThe Department of Applied Physics, The Hebrew University, Jerusalem, Israel
Tel Aviv, 2-4, December 2013
Slide2
Acknowledgment
Xun
Gu
1
Wolfram
Helml 1
Yunpei
Deng 1
Ferenc Krausz 1Reinhard Kienberger 1 Robert Hartmann 2 Takayoshi Kobayashi 3 Lothar Strueder 4
Max Planck, Quantum Optic, Germany
pnSensor
GmbH, Germany
University of Electro-Communications,
Chofu
, Tokyo, Japan
Max Planck, Extraterrestrial Physics, Germany
Slide3
Currently, the photon energy of atto-second pulses is limited to ~150 eV ( l~8 nm). Pushing the HHG toward the x-ray regimeShorter attosecond pulses Access to the water-window (300-500 eV) Time resolved spectroscopy of inner-shell processesX-ray diffraction imaging with a better resolutionRe-colliding electrons with higher energiesLaser induced diffraction imaging with better resolution
Motivation for
keV
HHG
Slide4
Increasing the energy of the re-colliding electrons
I (PW/cm2)0.150.51.0λ (nm)800210080021008002100Up (eV)9.061.83020660412ħωmax (eV)442111106682051321
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DownloadNote - The PPT/PDF document "keV HHG and Sub femtosecond K-shell exc..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Presentations text content in keV HHG and Sub femtosecond K-shell excitation.
keV
HHG and Sub femtosecond K-shell excitation. ( using IR (2.1m) Radiation Source )
Gilad MarcusThe Department of Applied Physics, The Hebrew University, Jerusalem, Israel
Tel Aviv, 2-4, December 2013
Slide2Acknowledgment
Xun
Gu
1
Wolfram
Helml 1
Yunpei
Deng 1
Ferenc Krausz 1Reinhard Kienberger 1 Robert Hartmann 2 Takayoshi Kobayashi 3 Lothar Strueder 4
Max Planck, Quantum Optic, Germany
pnSensor
GmbH, Germany
University of Electro-Communications,
Chofu
, Tokyo, Japan
Max Planck, Extraterrestrial Physics, Germany
Slide3Currently, the photon energy of atto-second pulses is limited to ~150 eV ( l~8 nm). Pushing the HHG toward the x-ray regimeShorter attosecond pulses Access to the water-window (300-500 eV) Time resolved spectroscopy of inner-shell processesX-ray diffraction imaging with a better resolutionRe-colliding electrons with higher energiesLaser induced diffraction imaging with better resolution
Motivation for
keV
HHG
Slide4Increasing the energy of the re-colliding electrons
I (PW/cm2)0.150.51.0λ (nm)800210080021008002100Up (eV)9.061.83020660412ħωmax (eV)442111106682051321
By using
a longer
wavelength
w
e can overcome the ionization
problem
Currently, the photon energy of
atto
-second pulses is limited to ~150
eV
(
l
~8 nm).
Slide5The 2-cycles IR source
15 fsec
740 µJ
1 kHz
Self CEP Stabilization
n
m
Slide6OPA system output:
Carrier wave-length:
l=
2.1
mmPulse duration: 15.7 fs (2 cycles)Pulse energy: 0.7 mJRep rate: 1000 Hz Automatically Carrier-envelope-phase-stabilized
wavelength, nm
f-to-3f interferogram
2 cycles IR (2.1mm) source
Long term (few hours) phase scan
B.Bergues
, et. al,
New Journal of Physics
13, no. 6 ( 2011): 063010.
I.
Znakovskaya
, et al. PRL 108, no. 6 (2012): 063002.
Slide7High Harmonic Generation
Slide8THG FROG
compressor
(bulk silicon)
Diagnostics for pulse
compression measurement
THG FROG
focusing lens
(CaF2, 250 mm)
High harmonic beam from N
2
through 150nm Pd +500nm C
Ne/N
2
gas target,
pressure
up to 3 bar!
PN
Camera
keV
high harmonics and K-shell excitation
Slide9THG FROG
compressor
(bulk silicon)
Diagnostics for pulse
compression measurement
THG FROG
focusing lens
(CaF2, 250 mm)
keV
high harmonics and K-shell excitation
High harmonic beam from N
2
through 150nm Pd +500nm C
Ne/N
2
gas target,
pressure
up to 3 bar
!
PN
Camera
Slide10Photon counting and photon’s energy resolving with the
pnCCD
Two photons hittingtwo pixels.The charge in each pixel is proportionalto the photon energy
Slide11Photon counting and photon’s energy resolving with the
pnCCD
Charge from one photons, spilled into neighboring pixels
Slide12Photon counting and photon’s energy resolving with the
pnCCD
Rejected as an error.Not a reasonable charge distribution
Cosmic ray trace
Slide13keV
high harmonics and K-shell excitation
High harmonics spectrum
from a neon gas target
through 500nm aluminum
Same spectrum through additional 500nm of vanadium (a) or iron (b)
Vanadium L-edge
Iron L-edge
1.6 keV
Cut off
G. Marcus, et. al,
PRL
108
,
023201.
Slide14Photon counting and photon’s energy resolving with the
pnCCD
Two photons hitting
two pixels.The charge in each pixel is proportionalto the photon energy
Slide15Photon counting and photon’s energy resolving with the
pnCCD
Slide16Real spectrum
Two pixels
pseudo photons
Slide17keV
high harmonics and K-shell excitation
High harmonics spectrum
from a neon gas target
through 500nm aluminum
Same spectrum through additional 500nm of vanadium (a) or iron (b)
Vanadium L-edge
Iron L-edge
1.6 keV
Cut off
G. Marcus, et. al,
PRL
108
,
023201.
Slide18keV high harmonics and K-shell excitation
Slide19keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Better phase matching conditions
due to the absorption lines
Inner shell excitation followed
by x-ray
emission
Slide20keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Calculation shows: Plasma
dispersion still dominate
Inner shell excitation followed
by x-ray
emission
Slide21keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Inner shell excitation followed
by x-ray fluorescence
Slide22keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Inner shell excitation followed
by x-ray fluorescence
2D
Slide23keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Inner shell excitation followed
by x-ray fluorescence
2D
Slide24keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Inner shell excitation followed
by x-ray fluorescence
2D
Slide25keV high harmonics and K-shell excitation
Enhanced peak at the K-edge
Inner shell excitation followed
by x-ray fluorescence
2D
Slide26keV high harmonics and K-shell excitation
Inner shell excitation followed
by x-ray fluorescence
Slide27Thank you
Slide28Slide29Slide30Slide31Slide32Slide33