| Paper |
Title |
Page |
| TUPLT139 |
Extending the Duty Cycle of the ISIS H Minus Ion Source, Thermal Considerations
|
1452 |
| |
- D.C. Faircloth, J.W.G. Thomason
CCLRC/RAL/ISIS, Chilton, Didcot, Oxon
|
|
| |
The ISIS H minus ion source is currently being developed on the Ion Source Development Rig (ISDR) at Rutherford Appleton Laboratory (RAL) in order to meet the requirements for the next generation of high power proton drivers. One key development goal is to increase the pulse width and duty cycle, but this has a significant effect on ion source temperatures if no other changes are made. A Finite Element Analysis (FEA) model has been produced to understand the steady state and dynamic thermal behavior of the source, and to investigate the design changes necessary to offset the extra heating.
|
|
| TUPLT141 |
The Effect of Extraction Geometry on the Measured ISIS H Minus Ion Source Beam
|
1458 |
| |
- J.W.G. Thomason, D.C. Faircloth, R. Sidlow, C.M. Thomas, M. Whitehead
CCLRC/RAL/ISIS, Chilton, Didcot, Oxon
|
|
| |
Recent Finite Element Analysis (FEA) electromagnetic modelling of the extraction region of the ISIS H minus source has suggested that the present set up of extraction electrode and 90 degree sector magnet is sub-optimal, with the result that the beam profile is asymmetric, the beam is strongly divergent in the horizontal plane and there is severe aberration in the focusing in the vertical plane. The FEA model of the beam optics has demonstrated that relatively simple changes to the system should produce a dramatic improvement in performance. These changes have been incorporated on the Ion Source Development Rig (ISDR) at Rutherford Appleton Laboratory (RAL), and their effects on the H minus beam are presented here.
|
|