DMGB Systems v426

DMGB SYSTEMS / AN EXPLANATORY CAD MODEL

Inside a Hall thruster.

Electricity helps send propellant backwards. The spacecraft gets a push forwards.

The very simple story

Imagine letting go of a balloon: air goes one way and the balloon goes the other. A space engine also pushes matter out. This kind uses electricity to help speed up tiny particles. It still needs both propellant and power.

Conceptual CAD cutaway of a ring-shaped Hall thruster, exposing the discharge channel, rear anode and central cathode. The removed sector is an explanatory cut, not a physical opening.
Original conceptual CAD, informed by the mechanism drawing in NASA Figure 4.30. Proportions are chosen for explanation, not measured from a real engine. The central cathode is one configuration. Open the full-size isometric drawing.

What the parts do

Discharge channel

The ring-shaped region where incoming propellant is ionized and accelerated. The cutaway lets you see inside.

Anode / propellant manifold

The electrode at the rear of the channel. In this explanation it also represents where incoming propellant is distributed.

Cathode / electron source

Supplies electrons to the discharge and the outgoing plume. Other Hall thrusters place this component outside the main body.

Read the scientific explanation

Crossed electric and magnetic fields affect how electrons move near the channel exit. Electron collisions help ionize propellant atoms. The electric field accelerates the positive ions mainly out along the axis. In this account, the ions are comparatively weakly affected by the magnetic field.

The cathode also supplies electrons to the outgoing plume, keeping it approximately charge-neutral. Electron drift around the annulus and conventional current must not be treated as the same direction. This model does not calculate either.

There is no acceleration grid in this schematic: gridded-ion thrusters use a different architecture. Magnet hardware, electrical circuits, feed details and thermal design are omitted. No field map, operating point, thrust, efficiency or lifetime is predicted.

Additional CAD view of the explanatory cutaway. An open sector exposes the annular channel and rear component; colors identify simplified parts, not measured temperatures or materials.
The removed sector and transparent walls are viewing aids; they do not represent physical openings or transparent engine materials. CAD exchange units do not establish manufacturing dimensions. This is not a tested or optimized thruster. Open the full-size section drawing.

Why this could matter

Electric propulsion can help spacecraft change or maintain their orbits while using propellant efficiently. Those spacecraft can support communications, observation and exploration. Whether a particular engine is useful depends on its power needs, thrust, lifetime and mission requirements; this drawing cannot answer those questions.

Explore the editable model

The source script builds the geometry; STEP preserves solid geometry and STL provides a triangular mesh. The files are educational models, not fabrication instructions.

STEP modelSTL meshCAD sourceComponentsAssumptionsModel guide