Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering
Abstract
Here we report on the results of an optical (526.5 nm) Thomson scattering investigation of low-Z (C5H8O2) plasma jets created on the OMEGA laser. We were able to measure the plasma parameters of individual jets and investigate the nature of the interaction when two jets were collided head-on. This work demonstrates that the mass density of an individual jet increased from 10-7 to 10-4 g cm-3, while the velocity fell from 300 to 100 km s over the probed time period (12–18 ns). When two jets were collided, we were able to capture the transition from collisionless interaction (interpenetration) to collisional interaction (stagnation and shock formation). The timing of the collisionless-to-collisional transition was investigated with visible light self-emission images of the experiments, with streaked Thomson scattering of the interaction region, and by calculating the ion penetration depth based on the measured density and velocity of the jets. All three approaches broadly agree: the colliding jets transitioned from collisionless to collisional behavior around 16 ns after drive laser beams were fired.
- Authors:
-
[1];
[2];
- Univ. of Michigan, Ann Arbor, MI (United States)
- Univ. of Rochester, NY (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- OSTI Identifier:
- 1530402
- Alternate Identifier(s):
- OSTI ID: 1772317
- Report Number(s):
- LLNL-JRNL-816360
Journal ID: ISSN 1070-664X; 10.1063/1.5047218
- Grant/Contract Number:
- NA0002956; NA0002719; NA0001944; AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 1; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Doppler effect; Thomson scattering; lasers; streak cameras; plasma waves; plasma collisions; electron density
Citation Formats
Young, R. P., Kuranz, C. C., Froula, D., Ross, J. S., and Klein, S. Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering. United States: N. p., 2019.
Web. doi:10.1063/1.5047218.
Young, R. P., Kuranz, C. C., Froula, D., Ross, J. S., & Klein, S. Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering. United States. https://doi.org/10.1063/1.5047218
Young, R. P., Kuranz, C. C., Froula, D., Ross, J. S., and Klein, S. Thu .
"Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering". United States. https://doi.org/10.1063/1.5047218. https://www.osti.gov/servlets/purl/1530402.
@article{osti_1530402,
title = {Observation of collisionless-to-collisional transition in colliding plasma jets with optical Thomson scattering},
author = {Young, R. P. and Kuranz, C. C. and Froula, D. and Ross, J. S. and Klein, S.},
abstractNote = {Here we report on the results of an optical (526.5 nm) Thomson scattering investigation of low-Z (C5H8O2) plasma jets created on the OMEGA laser. We were able to measure the plasma parameters of individual jets and investigate the nature of the interaction when two jets were collided head-on. This work demonstrates that the mass density of an individual jet increased from 10-7 to 10-4 g cm-3, while the velocity fell from 300 to 100 km s over the probed time period (12–18 ns). When two jets were collided, we were able to capture the transition from collisionless interaction (interpenetration) to collisional interaction (stagnation and shock formation). The timing of the collisionless-to-collisional transition was investigated with visible light self-emission images of the experiments, with streaked Thomson scattering of the interaction region, and by calculating the ion penetration depth based on the measured density and velocity of the jets. All three approaches broadly agree: the colliding jets transitioned from collisionless to collisional behavior around 16 ns after drive laser beams were fired.},
doi = {10.1063/1.5047218},
journal = {Physics of Plasmas},
number = 1,
volume = 26,
place = {United States},
year = {Thu Jan 03 00:00:00 EST 2019},
month = {Thu Jan 03 00:00:00 EST 2019}
}
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Works referencing / citing this record:
Laser beam self-focusing in collisional plasma with periodical density ripple
journal, February 2020
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