JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Tarvainen, O.A. AU - Faircloth, D.C. AU - Julin, J. AU - Kalvas, T. AU - Letchford, A.P. ED - Machicoane, Guillaume ED - Allen, Alexa ED - Lesage, Ana ED - Schaa, Volker R.W. TI - Conceptual Design of Heavy Ion ToF-ERDA Facility Based on Permanent Magnet ECRIS and Variable Frequency RFQ Accelerator J2 - Proc. of ECRIS2020, East Lansing, MI, USA, 28-30 September 2020 CY - East Lansing, MI, USA T2 - International Workshop on ECR Ion Sources T3 - 24 LA - english AB - Ion beam analysis is typically based on tandem accelerators and negative ions. The required 5-20 MeV energies for heavy ion time-of-flight elastic recoil detection analysis* (ToF-ERDA) can be achieved with a high charge state ion source and RFQ accelerator. We present a conceptual design of a ToF-ERDA facility based on a permanent magnet ECRIS and variable frequency RFQ accelerating 1-10 pnA of 40Ar⁸⁺, 84Kr¹⁷⁺ and 129Xe²⁴⁺ ions to 4-7, 10⁻¹⁵ and 13-20 MeV. We present the PM ECRIS requirements focusing on the CUBE-ECRIS** with a quadrupole min-B field topology. Beam dynamics studies demonstrating good transmission of the heavy ion beams from the ion source to the RFQ entrance through the electrostatic low energy beam transport (LEBT) and a permanent magnet dipole are presented. The predicted LEBT transmissions of the CUBE-ECRIS (rectangular extraction slit) and a conventional ECRIS (circular extraction aperture) are compared. The conceptual design of the RFQ is described and the implications of the energy spread on the high energy beam transport are discussed. It is demonstrated that an energy spread below 0.2 % is necessary for appropriate resolution of the heavy ion ToF-ERDA. PB - JACoW Publishing CP - Geneva, Switzerland SP - 21 EP - 26 KW - rfq KW - ECR KW - ECRIS KW - LEBT KW - ion-source DA - 2022/07 PY - 2022 SN - 2222-5692 SN - 978-3-95450-226-4 DO - doi:10.18429/JACoW-ECRIS2020-MOXZO02 UR - https://jacow.org/ecris2020/papers/moxzo02.pdf ER -