Open Access

Table 1

Comparison and scalability between the laser-driven plasma stream and a YSO jet.

PEARL jet
Material CF2 (Teflon) H
Z 1.5 1
A 17.3 1.3

B (G) 9 × 104 0.05
L (cm) 1 4 × 1014
ne (cm−3) 2 × 1017 4 × 105
ρ (g cm−3) 4 × 10−6 8.7 × 10−19
Te (kK) 232 29
Ti 9kK) 232 29
Vflow (km s−1) 200 250
CS (km s−1) 21.5 24.8
VA (km s−1) 129 151
le (cm) 2.5 × 10−3 1.3 × 107
τcol e (ns) 1.3 × 10−2 1.9 × 108
RLe (cm) 1.2 × 10−4 75
fce (Hz) 2.52 × 1011 1.4 × 105
li (cm) 1.5 × 10−3 1.7 × 107
τcol i (ns) 1.5 1.3 × 1010
RLi (cm) 1.4 × 10−2 3.7 × 103
fci (Hz) 1.2 × 107 5.9 × 101
M 9.3 10
Malf 1.5 1.6
τη (ns) 9.3 × 103 5.4 × 1031
ReM 180 3 × 1015
Re 680 1.1 × 1012
Pe 5 2.3 × 1010
Eu 12 13
β 3.3 × 10−2 3.2 × 10−2
Rb (cm) 0.4 1.6 × 1014

Notes. (i) The primary parameters are in bold, and the other values are derived from them. The symbols are as follows: Z is the charge state, A is the mass number, B is the magnetic field, L is the spatial scale, ne is the electron density, ρ is the mass density, Te is the electron temperature, Ti is the ion temperature, Vflow is the stream velocity, CS is the sound velocity, VA is the Alfvén velocity , where ni is the ion density and mi is the ion mass), le is the collisional electron mean free path, τcol e is the electron collision time, RLe is the electron Larmor radius, fce is the electron gyrofrequency, li is the collisional ion mean free path, τcol i is the ion collision time, RLi is the ion Larmor radius, fci is the ion gyrofrequency, M is the Mach number, Mal f is the Alfvén Mach number (Malf = V/VA), τη is the magnetic diffusion time (τη = L2/η, where η is the magnetic diffusivity), ReM is the magnetic Reynolds number (ReM = LV/η), Re is the Reynolds number (Re = LV/v, where v is the kinematic viscosity), Pe is the Pecklet number (Pe = LV/χ, where χ is the thermal diffusivity), Eu is the Euler number, and β is the plasma beta.

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