Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 13th International Particle Accelerator Conference



Conference Name

13th International Particle Accelerator Conference, 12-17 June 2022, Bangkok, Thailand


Nb₃Sn is a prospective material for future superconducting RF (SRF) accelerator cavities. The material can achieve higher quality factors, higher temperature operation and potentially higher accelerating gradients (E_{acc} 96 MV/m) compared to conventional niobium. In this work, we performed modeling of the Upgraded Injector Test Facility (UITF) at Jefferson Lab utilizing newly constructed Nb₃Sn cavities. We studied the effects of the buncher cavity and varied the gun voltages from 200-500 keV. We have calibrated and optimized the SRF cavity gradients and phases for the Nb₃Sn five-cell cavities energy gains with the framework of General Particle Tracer (GPT). Our calculations show the beam goes cleanly through the unit. There is full energy gain out of the second SRF cavity but not from the first SRF cavity due to non-relativistic phase shifts.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. Any further distribution of this work must maintain attribution to the authors, the published article's title, publisher, and DOI.

Original Publication Citation

Pokharel, S., Kraft, G.A. & Hofler, A.S. (2022) Modeling a Nb3Sn Cryounit in GPT at UITF. In F. Zimmerman, H. Tanaka, P. Sadmuang, P. Klysubun, P. Sunwong, T. Chanwattana, & C. Petit-Jean Genaz (Eds.), Proceedings of the 13th International Particle Accelerator Conference (pp. 576-579). Journal of Accelerator Conferences Website.


0000-0002-0328-5828 (Krafft)