Pisent, A. Baltador, C. Bellan, L. Celona, L. Comunian, M. Esposito, J. Ferrari, L. Galatà, A. Grespan, F. Mereu, P. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-215-8 10.18429/JACoW-LINAC2022-MOPOGE03 English 142-145 DTL linac rfq ECR target Contribution to a conference proceedings 2022 2022-09 https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE03 https://jacow.org/linac2022/papers/mopoge03.pdf The recent accelerator developments allow the design of very efficient linear accelerators for various applications. The possible use of concepts, components and developments well established or recently achieved in larger projects will be illustrated, with some examples related to isotope production for medical applications.