Spark gap with current in one direction only?
(from
https://weareinfiniteenergy.wordpress.co...gap-diode/)
Is this the same as in this video when sparking one capacitor plate?
Here is what AI tells when you ask about spark gap diode:
A spark gap diode, also known as a unidirectional spark gap or triggered spark gap, is a device designed to allow current to flow in only one direction, similar to a semiconductor diode, but using a spark gap mechanism. Here is how you can configure a spark gap to achieve this unidirectional behavior:
Configuration for a Spark Gap Diode
- Asymmetric Electrode Design:
- Use electrodes of different shapes or materials. One common design uses a pointed electrode (cathode) and a rounded or flat electrode (anode). The electric field is more concentrated at the pointed electrode, which facilitates the initiation of the spark primarily in one direction. (my note: this is oposite as described on image above)
- Polarization:
- Polarize the electrodes such that the pointed electrode is always the cathode (negative) and the flat/rounded electrode is the anode (positive). This creates a condition where the spark gap breaks down more easily when the pointed electrode is negative.
- Gas Type and Pressure:
- The type of gas and its pressure within the spark gap chamber can influence the breakdown voltage. Certain gases or pressures might facilitate a directional breakdown. Common gases used include air, nitrogen, or even specific gas mixtures designed to enhance unidirectional behavior.
- External Magnetic Field:
- An external magnetic field can be applied to influence the direction of electron and ion motion, further promoting unidirectional current flow.
I think for me is usable only #1 of this list.
And little bit more from AI:
Electrode Configuration:
- Cathode (Negative Electrode): Use a material with a high electron affinity and low work function to facilitate electron emission. Materials like tungsten or nickel are good choices.
- Anode (Positive Electrode): Use a material that can withstand high temperatures and oxidation, such as copper or platinum.
Gas Selection: Although air is commonly used, other gases such as argon, neon, or nitrogen can be used depending on the desired characteristics of the spark gap diode. These gases have different ionization potentials and can affect the performance and stability of the spark.
Directional Control: To ensure the current flows in only one direction, you can incorporate a magnetic field perpendicular to the current flow. This field can influence the path of the electrons and ions, enhancing the unidirectional flow of current. Alternatively, use geometric configurations or additional auxiliary electrodes to guide the ionized path directionally.
Triggering Mechanism: In some designs, a triggering electrode can be used to initiate the spark at a lower voltage. This electrode is typically placed near the gap and connected to a control circuit that applies a small pulse to start the ionization process.
Example configuration:
Electrodes:
- Cathode: Tungsten rod, 2 mm diameter.
- Anode: Copper plate, 5 mm thick
Magnetic Field:
- Place a small permanent magnet or an electromagnet perpendicular to the gap to influence the direction of the ionized particles.
Triggering:
- Use a small auxiliary electrode near the gap connected to a pulse generator.
The magnetic field or geometric configuration ensures that the current flow is unidirectional, functioning like a conventional diode but using plasma dynamics instead of semiconductor junctions.
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