Spectral splitting of high order harmonics of ionizing gases irradiated with ultrashort intense laser pulses

2002 ◽  
Vol 45 (1) ◽  
pp. 106
Author(s):  
Fangchuan ZHONG
Keyword(s):  
Laser Pulses ◽  
High Order ◽  
Intense Laser ◽  
Intense Laser Pulses ◽  
Spectral Splitting ◽  
Ionizing Gases

scholarly journals Interaction of ultra-intense laser pulses with relativistic ions

2004 ◽  
Vol 22 (3) ◽  
pp. 203-206 ◽  
Author(s):  
C.C. CHIRILĂ ◽  
C.J. JOACHAIN ◽  
N.J. KYLSTRA ◽  
R.M. POTVLIEGE
Keyword(s):  
Laser Pulse ◽  
Strong Field ◽  
Ion Beam ◽  
Laser Pulses ◽  
Field Approximation ◽  
High Order ◽  
Intense Laser ◽  
High Order Harmonic ◽  
Intense Laser Pulses ◽  
High Laser

At high laser intensities, three step recollision processes such as high order harmonic generation and high-order ATI, are normally severely suppressed due to the magnetic field component of the laser pulse. However, if the laser pulse and relativistic ion beam are directed against each other, a significant increase in the frequency and the intensity of the pulse in the rest frame of the ions can occur. By performing calculations based on a Coulomb-corrected nondipole strong field approximation, we have shown that there is a range of intensities, Lorentz factors, and ion charges for which the suppression of the three step recollision processes is not severe, even for ponderomotive energies exceeding 10 keV. As an example, we consider parameters relevant to the accelerator that will be built at GSI-Darmstadt, capable of accelerating multicharged ions to Lorentz factors reaching 30.

scholarly journals High resolution spectroscopy in the XUV with pairs of mutually coherent and time-delayed laser harmonics

2004 ◽  
Vol 22 (3) ◽  
pp. 199-202 ◽  
Author(s):  
MARCO BELLINI ◽  
STEFANO CAVALIERI ◽  
CHIARA CORSI ◽  
ROBERTO ERAMO ◽  
MARZIA MATERAZZI
Keyword(s):  
High Resolution ◽  
Excited States ◽  
Extreme Ultraviolet ◽  
Noble Gas ◽  
Laser Pulses ◽  
High Order ◽  
Atomic Spectroscopy ◽  
Intense Laser ◽  
High Resolution Spectroscopy ◽  
Intense Laser Pulses

We present a Ramsey technique using high-order harmonics for high-resolution atomic spectroscopy in the extreme ultraviolet. Pairs of time-delayed and phase-coherent harmonic pulses generated by the interaction of ultrashort and intense laser pulses with a noble gas are used to study excited states of krypton.

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