Is it possible to put multiple accelerator grids in an ion engine?

In summary: Therefore, the conversation ended without any conclusion.In summary, the conversation discussed the possibility of using multiple accelerator grids in an ion engine to increase exhaust velocity and the potential benefits and disadvantages of this approach. However, it was determined that this is not feasible with xenon ion engines as the grids would need to be re-energized in order to work. Additionally, it was mentioned that removing grids between the ion source and the last grid could simplify the engine, but the comparison was made to vacuum tube grid technology, which may not be directly applicable to ion engines. The conversation ultimately ended without a clear conclusion.
  • #1
RocketAstro
4
2
Is it possible to put multiple accelerator grid in ion engine instead of one? So we will get higher exhaust velocity and benefit for us right? or is there any disadvantages?
 
Physics news on Phys.org
  • #2
Why two small ones instead of one bigger one?
 
  • #3
RocketAstro said:
Is it possible to put multiple accelerator grid in ion engine instead of one? So we will get higher exhaust velocity and benefit for us right? or is there any disadvantages?
Here is a paper from NASA that analyzed ion wind propulsion.
https://ntrs.nasa.gov/citations/20100000021
TLDR; not really.
if you are talking about a xenon ion engine then no. The grid disassociates the ion from the ‘circuit’ so it can shoot out the nozzle. I believe you would have to re energize the particle to even make a second accelerator grid work. So unfortunate no.
 
  • #4
See it from the other direction: What's the point of adding grids between the ion source and the last grid? Just remove them, you remove obstacles for the ions and simplify the engine.
 
  • #5
Old style hot-cathode vacuum tubes and cathode ray tubes (CRT) often added additional grids between the anode and cathodes for various purposes. Even grids that increased anode emissions often inhibited flow; i.e., increased travel time between anodes and cathodes.

While not an ion reaction engine, vacuum tube grid technology has extensive documentation and possible application.
 
  • #6
It's probably worth pointing out that the OP posted and left.
 

1. Can multiple accelerator grids increase the thrust of an ion engine?

Yes, multiple accelerator grids can increase the thrust of an ion engine. The accelerator grids are responsible for accelerating the ions, which in turn generate thrust. By adding more accelerator grids, the ions can be accelerated to higher velocities, resulting in a higher thrust output.

2. How many accelerator grids can be put in an ion engine?

The number of accelerator grids that can be put in an ion engine depends on the design and size of the engine. Some ion engines may have only one grid, while others can have multiple grids. The number of grids also depends on the specific application and desired thrust output.

3. What are the potential benefits of using multiple accelerator grids in an ion engine?

Using multiple accelerator grids in an ion engine can increase the thrust output and improve the efficiency of the engine. This can result in faster acceleration and longer operating times for spacecraft. Additionally, multiple grids can provide more flexibility in the control and direction of the ion beam.

4. Are there any drawbacks to using multiple accelerator grids in an ion engine?

One potential drawback of using multiple accelerator grids is that it can increase the complexity and cost of the ion engine. More grids mean more components that need to be designed, manufactured, and maintained. Additionally, the added weight of the grids may impact the overall weight and size limitations of the spacecraft.

5. Is it possible to retrofit an existing ion engine with multiple accelerator grids?

It is possible to retrofit an existing ion engine with multiple accelerator grids, but it may not be practical or cost-effective. The design and structure of the engine would need to be modified to accommodate the additional grids, which could be a complex and expensive process. It may be more feasible to design and build a new ion engine with multiple grids from the beginning.

Similar threads

Exploring Electron Rockets for Interstellar Travel
    • Aerospace Engineering
Replies
5
Views
1K
Understanding High Thrust of Vacuum Rocket Engines
    • Aerospace Engineering
Replies
2
Views
2K
Ramjet artillery shell of a big size
    • Aerospace Engineering
2
Replies
35
Views
3K
Engineering Mid career guidance as an aerospace engineer
    • STEM Career Guidance
Replies
2
Views
1K
Fusion aerospace propulsion systems for the near future
    • Aerospace Engineering
Replies
23
Views
3K
CRT gun "dissection" questions
    • Electrical Engineering
Replies
12
Views
1K
As much steam as possible from engine exhaust gas + warm water?
    • General Engineering
Replies
25
Views
2K
Physics Undergraduate Mechanical vs Aerospace Engineering
    • Aerospace Engineering
Replies
4
Views
5K
Engineering Masters programs to work in aerospace/defense as an engineer
    • STEM Career Guidance
Replies
19
Views
3K
Aerospace Engineering Contest Site
    • Aerospace Engineering
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top