Speaker
Description
Permanent magnets can reduce the size and continuous electrical load of compact electron cyclotron resonance (ECR) ion sources, but their fixed magnetic field strongly couples magnetic topology to the microwave mode. We investigate a compact 2.45 GHz permanent-magnet ECR source using three-dimensional magnetostatic, driven-cavity, prescribed-plasma, and full-orbit electron simulations, and compare it with a solenoid configuration matched to the same central field and axial ECR crossings. The permanent-magnet design provides 3.19 times higher ECR-surface mean co-rotating microwave intensity, reduces the 50 ns electron wall-loss fraction from 25% to 7%, and gives a slightly higher fraction of electrons reaching the argon ionization threshold. Although the solenoid produces a larger median energy gain, the permanent-magnet case retains a stronger high-energy tail while eliminating an estimated 15.56 kW room-temperature coil loss. These results show that axial ECR matching alone is insufficient and support integrated magnet-cavity co-design for compact ECR sources.
Footnotes
No footnotes
Funding Agency
No funding
| I have read and accept the Privacy Policy Statement | Yes |
|---|