Measurements of the Growth and Saturation of Electron Weibel Instability in Optical-Field Ionized Plasmas
Journal Article
·
· Physical Review Letters
- Univ. of California, Los Angeles, CA (United States); UCLA
- Tsinghua Univ., Beijing (China)
- Univ. of California, Los Angeles, CA (United States)
The temporal evolution of the magnetic field associated with electron thermal Weibel instability in optical-field ionized plasmas is measured using ultrashort (1.8 ps), relativistic (45 MeV) electron bunches from a linear accelerator. The self-generated magnetic fields are found to self-organize into a quasistatic structure consistent with a helicoid topology within a few picoseconds and such a structure lasts for tens of picoseconds in underdense plasmas. Here, the measured growth rate agrees well with that predicted by the kinetic theory of plasmas taking into account collisions. Magnetic trapping is identified as the dominant saturation mechanism.
- Research Organization:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- NSF; National Natural Science Foundation of China (NSFC); USDOE
- Grant/Contract Number:
- SC0010064
- OSTI ID:
- 1737458
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 125; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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