Publications & Presentations

Journal Articles & Preprints

Bibliographic details status 2025.

1. Three dimensional Particle-in-Cell simulation of a radio-frequency ion thruster (RIT-2.5): model validation with experiments
   N. Joshi; C. Heiliger; O. Meusel
   Journal of Electric Propulsion 4, 66 (2025)
   DOI / preprint ↗
2. 2.xD – Particle-in-Cell simulation of radio-frequency ion thruster RIT-2.5 using cylindrical coordinate system
   P. Auffarth; N. Joshi; C. Heiliger
   Journal of Electric Propulsion 4, 69 (2025)
   DOI / preprint ↗
3. Experimental Characterization and Simulation-Based Analysis of the RIT-2.5 Radiofrequency Ion Thruster
   N. Joshi; O. Meusel
   Preprint; submitted to Review of Scientific Instruments
   DOI / preprint ↗
4. Particle-in-Cell simulation of radio-frequency ion thruster RIT-1.0
   N. Joshi; C. Heiliger
   Journal of Electric Propulsion 3, 5 (2024)
   DOI / preprint ↗
5. Fluid-Kinetic-hybrid simulation for ion thruster using polymorphic particles
   N. Joshi; C. Heiliger
   Journal of Electric Propulsion 2, 20 (2023)
   DOI / preprint ↗
6. Ion thrusters for electric propulsion: Scientific issues developing a niche technology into a game changer
   K. Holste; P. Dietz; S. Scharmann; K. Keil; T. Henning; D. Zschätzsch; M. Reitemeyer; B. Nauschütt; F. Kiefer; F. Kunze; J. Zorn; C. Heiliger; N. Joshi; U. Probst; R. Thüringer; C. Volkmar; D. Packan; S. Peterschmitt; K.-T. Brinkmann; H.-G. Zaunick; M. H. Thoma; M. Kretschmer; H. J. Leiter; S. Schippers; K. Hannemann; P. J. Klar
   Review of Scientific Instruments 91, 061101 (2020)
   DOI / preprint ↗
7. CHOPPI: A Particle In Cell code for ion beam transport through beam chopper: A demonstration with experiments
   N. Joshi; O. Meusel
   Nuclear Instruments and Methods in Physics Research A 951, 162939 (2020)
   DOI / preprint ↗
8. Experiments with low energy ion beam transport into toroidal magnetic fields
   N. Joshi
   Nuclear Instruments and Methods in Physics Research A 943, 162495 (2019)
   DOI / preprint ↗
9. The NSCL cyclotron gas stopper—under construction
   S. Schwarz; M. Brodeur; G. Bollen; N. Joshi; D. J. Morrissey; R. Ringle
   Nuclear Instruments and Methods in Physics Research B 317, 463–467 (2013)
   DOI / preprint ↗
10. Traveling wave ion transport for the cyclotron gas stopper
    M. Brodeur; G. Bollen; N. Joshi; D. J. Morrissey; S. Schwarz
    Nuclear Instruments and Methods in Physics Research B 317, 468–472 (2013)
    DOI / preprint ↗
11. Proton Driver Linac for the Frankfurt Neutron Source
    C. Wiesner; L. P. Chau; H. Dinter; M. Droba; M. Heilmann; N. Joshi; O. Meusel; D. Noll; H. Podlech; U. Ratzinger; R. Reifarth; A. Schempp; S. Schmidt; W. Schweizer; K. Volk; C. Wagner
    AIP Conference Proceedings 1265, 487 (2010)
    DOI / preprint ↗
12. Characterization of volume type ion source for p, H₂⁺, H₃⁺ beams
    N. Joshi; M. Droba; O. Meusel; U. Ratzinger
    Nuclear Instruments and Methods in Physics Research A 606, 310–313 (2009)
    DOI / preprint ↗

Conference Proceedings

1. Holistic Modeling of Erosion Processes in Radio-Frequency Ion Thrusters
   K. Keil; K. Holste; P. Klar; N. Joshi; C. Heiliger
   IEPC-2025-207, London (2025)
2. 2.xD Simulation of Radio-frequency Ion Thruster (RIT-2.5)
   N. Joshi; P. Auffarth; C. Heiliger
   IEPC-2024-618, Toulouse (2024)
3. Holistic Modelling of Erosion Processes in Radio-Frequency Ion Thrusters
   K. Keil; N. Joshi; K. Holste; C. Heiliger; P. Klar
   Space Propulsion 2024, SP2024-363, Glasgow
4. Particle in Cell Simulation for Large Radio-frequency Ion Thruster Using 3D Cylindrical Coordinate System
   N. Joshi; P. Auffarth; C. Heiliger
   IEPC-2022-256, Boston (2022)
5. Modelling of Erosion Processes in Gridded Ion Engines in Combination with Global Model for Radio-Frequency Ion Thruster
   K. Keil; N. Joshi; K. Holste; C. Heiliger; P. Klar
   IEPC-2022-259, Boston (2022)
6. Ion Optics Simulation with the Particle-in-Cell Method and Calculation of Grid Erosion
   K. Keil; N. Joshi; K. Holste; C. Heiliger; P. Klar
   Space Propulsion 2022, SP2022-294, Estoril
7. Status of the NSCL Cyclotron Gas Stopper
   N. Joshi; G. Bollen; M. Brodeur; D. J. Morrissey; S. Schwarz
   IPAC 2012
8. E × B Chopper System for High Intensity Proton Beams
   C. Wiesner; L. P. Chau; H. Dinter; M. Droba; N. Joshi; O. Meusel; I. Müller; U. Ratzinger
   LINAC 2010, pp. 914–916
9. The Frankfurt Neutron Source FRANZ
   U. Ratzinger; L. P. Chau; H. Dinter; M. Droba; N. Joshi; O. Meusel; I. Müller; D. Noll; H. Podlech; R. Reifarth; A. Schempp
   IPAC 2010, pp. 597–599
10. Beam Accumulation in Stellarator Type Storage Ring
    M. Droba; N. Joshi; O. Meusel; H. Niebuhr; U. Ratzinger
    IPAC 2010, pp. 4473–4475
11. Scaled Down Experiments for a Stellarator Type Magnetostatic Storage Ring
    N. Joshi; M. Droba; O. Meusel; H. Niebuhr; U. Ratzinger
    IPAC 2010, pp. 3885–3887
12. Chopper for Intense Proton Beams at Repetition Rates up to 250 kHz
    C. Wiesner; L. P. Chau; M. Droba; N. Joshi; O. Meusel; U. Ratzinger
    PAC 2009
13. Beam Transport in Toroidal Magnetic Field
    N. Joshi; M. Droba; O. Meusel; U. Ratzinger
    EPAC 2008, pp. 2641–2643
14. One Nanosecond Bunch Compressor for Intense Proton Beams
    L. P. Chau; M. Droba; N. Joshi; O. Meusel; U. Ratzinger; C. Wiesner
    EPAC 2008, pp. 3578–3580
15. Design Studies on Novel Stellarator Type High Current Storage Ring
    M. Droba; N. Joshi; O. Meusel; U. Ratzinger
    EPAC 2006, pp. 297–299

Oral Presentations

1. Plasma Diagnostics for Fusion-Relevant Studies
   IFuEL Kickoff meeting, Universität Rostock, Oct 2026
   Presentation PDF ↗
2. 2.xD Simulation of Radio-frequency Ion Thruster (RIT-2.5)
   International Electric Propulsion Conference, Toulouse (2024)
   Presentation PDF ↗
3. Radio Frequency Ion Thruster: Principles and Modelling
   Institut für Angewandte Physik, September 2023
   Presentation PDF ↗
4. From Machine Building to Machine Learning: Accelerators with AI
   November 2017
   Presentation PDF ↗
5. Cyclotron Gas Stopper and Advanced Low-energy Ion Transport Techniques
   April 2014
   Presentation PDF ↗
6. Simulation of the NSCL Cyclotron Gas Stopper
   APS DNP Meeting (2011)
   Presentation PDF ↗
7. Ion Beams: Accumulation, Instrumentation and Production of High Current Beams
   Accelerator Division Seminar, ESS Lund, 8 November 2010
8. PIC Method for Particle Simulation
   HICforFAIR Workshop, Riezlern (2010)
   Presentation PDF ↗
9. Beam Transport Experiments in Toroidal Magnetic Fields
   Riezlern (2009)

Technical & Internal Reports

• Validation and Extension of the PlasmaPIC Code for Plasma Modelling in Radio-Frequency Ion Thrusters Final Report PDF
• Status of Magnetostatic Ring Studies PDF
• High Voltage Pulse Generator for an E × B Chopper System PDF
• Square Wave Integrator Circuit PDF