Observation of the plasma channel dynamics and Coulomb explosion in the interaction of a high intensity laser pulse with He gas jet
Creators
- 1. P.N. Lebedev Physics Inst. RAS, Moscow (Russian Federation)
- 2. Center for Ultrafast Optical Science, Univ. of Michigan, Ann Arbor, MI (United States)
Description
We report on first interferometric observations of the dynamics of electron-ion cavitation of relativistically self-focused intense 4 TW 400 fs laser pulse in a He gas jet. The electron density in the channel 1 mm long and 30 μm in diameter drops approximately 10 times from the maximum value of ∼ 8 x 1019 cm-3. High radial velocity of the plasma expansion ∼ 3.8 x 108 cm/s corresponding to the ion energy about 300 keV has been observed. The total energy of fast ions is estimated to be 6% of the laser pulse energy. The high velocity radial plasma expulsion is explained by a charge separation due to the strong ponderomotive force. This experiment demonstrates a new possibility for direct transmission of a significant part of laser pulse energy into the ions
Additional details
Publishing Information
- Journal Title
- Pis'ma v Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki
- Journal Volume
- 66
- Journal Issue
- 11-12
- Journal Page Range
- p. 787-792
- ISSN
- 0370-274X
- CODEN
- PZETAB
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 30029107
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- BEAM DYNAMICS; CROSS SECTIONS; ELECTRON COLLISIONS; ELECTRON DENSITY; HELIUM; ION BEAMS; JETS; LASER-PRODUCED PLASMA; PLASMA HEATING; SPATIAL DISTRIBUTION; TWO-DIMENSIONAL CALCULATIONS
- Descriptors DEC
- BEAMS; COLLISIONS; DISTRIBUTION; DYNAMICS; ELEMENTS; HEATING; MECHANICS; NONMETALS; PLASMA; RARE GASES
Optional Information
- Notes
- 14 refs., 3 figs.