| Paper |
Title |
Page |
| TUP09 |
The Heidelberg High Current Injector: A Versatile Injector for Storage Ring Experiments
|
309 |
| |
- R. von Hahn, M. Grieser, R. Repnow, D. Schwalm, C.P. Welsch
MPI-K, Heidelberg
|
|
| |
The High Current Injector (HCI) was designed and built as a dedicated injector for the Test Storage Ring in Heidelberg to deliver mainly singly charged Li- and Be-ions. After start for routine operation in 1999 the HCI delivered stable beams during the following years for about 50 % of the experiments with very high reliability. Due to the requirements from the experiment the HCI changed during that period from a machine for singly charged positive ions to an injector for a large variety of molecules as well as positively or negatively charged light ions. After successful commissioning of the custom built 18 GHz high power ECR-source at its present test location various modifications and additions were made in preparation of a possible conversion into an injector for highly charged heavy ions as a second phase. This paper gives an overview of the experience gained in the passed 5 years and presents the status of the upgrade of the HCI.
|
|
| THP86 |
Low Power Measurements on a Finger Drift Tube Linac
|
800 |
| |
- A. Schempp, K.-U. Kühnel
IAP, Frankfurt-am-Main
- C.P. Welsch
MPI-K, Heidelberg
|
|
| |
The efficiency of RFQs decreases at higher particle energies. The DTL structures used in this energy regions have a defocusing influence on the beam. To achieve a focusing effect, fingers with quadrupole symmetry were added to the drift tubes. Driven by the same power supply as the drift tubes, the fingers do not need an additional power source or feedthrough. Beam dynamics have been studied with PARMTEQ . Detailed analysis of the field distribution was done and the geometry of the finger array has been optimized with respect to beam dynamics. A spiral loaded cavity with finger drift tubes was built up and low power measurements were done. In this contribution, the results of the rf simulating with Microwave Studio are shown in comparison with bead pertubation measurement on a prototype cavity.
|
|