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private:writeups:hallthrusters [2020/08/06 15:57]
admin [Magnetic field design]
private:writeups:hallthrusters [2020/08/06 15:59] (current)
admin
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   * Discharge current measurements - Measurement of total current, I_elec + I_ion.  Also used to study instabilities (as instabilities causes oscillations in conductivity).     * Discharge current measurements - Measurement of total current, I_elec + I_ion.  Also used to study instabilities (as instabilities causes oscillations in conductivity).  
   * Highspeed videos of exhaust.  Image is on-axis.  - Used to study spoke instabilities.     * Highspeed videos of exhaust.  Image is on-axis.  - Used to study spoke instabilities.  
 +
 +
 +====== Ionization region ======
 +
 +==== Length of ionization region ====
 +
 +[Boeuf2017] 
 +  * TODO
 +
 +
 ====== Questions ====== ====== Questions ======
   * Why is there no ion saturation limit to Hall thrusters?  Is this because of the "Double Layer" that forms as the effective cathode?  And if so, I don't really understand this...   * Why is there no ion saturation limit to Hall thrusters?  Is this because of the "Double Layer" that forms as the effective cathode?  And if so, I don't really understand this...
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   * [Boeuf2017] As the thruster size and power change, the current density does not change and stays on the order of 1000 A/m^2 in most Hall thrusters.  Why?   * [Boeuf2017] As the thruster size and power change, the current density does not change and stays on the order of 1000 A/m^2 in most Hall thrusters.  Why?
   * Would secondary electrons generated by electron striking channel walls be an alternative source of electrons?     * Would secondary electrons generated by electron striking channel walls be an alternative source of electrons?  
 +  * There's something to the equipotential argument in E and B that I'm not quite following.  
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