1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

High power RF testing of high-temperature superconductors

WEAD2
4 Jun 2025, 09:50
20m
Hall 101 (TICC)

Hall 101

TICC

Contributed Oral Presentation MC7.T07 Superconducting RF WEAD:Accelerator Technology and Sustainability (Contributed)

Speaker

Ankur Dhar (SLAC National Accelerator Laboratory)

Description

Superconducting materials such as niobium have been extremely useful for accelerator technology but require low temperature operation ~2 K. The development of high temperature superconductors (HTS) is promising due to their operating temperatures being closer to that of liquid nitrogen ~77 K. This work aims to determine the high-power RF performance of these materials at X-band (11.424 GHz). We have tested several types of rare earth barium copper oxide (REBCO) materials, such as films deposited by electron-beam physical vapor deposition, coated conductors soldered to a copper substrate, and solid pucks formed from powder. RF testing was done via a hemispherical TE mode cavity that maximizes the magnetic field and minimizes the electric field on a 2-inch sample region. We will report on surface resistance vs temperature measurements at low and high power,as well as RF testing of a pulse compression cavity lined with REBCO coated conductors.

Funding Agency

This work is supported by U.S. Department of Energy Contract No. DE-AC02-76SF00515.

Region represented America
Paper preparation format LaTeX

Author

Ankur Dhar (SLAC National Accelerator Laboratory)

Co-authors

Emilio Nanni (SLAC National Accelerator Laboratory) Gregory Le Sage (SLAC National Accelerator Laboratory) Jessica Golm (Helmholtz Institute Jena) Joffre Gutierrez (Institut de Ciència de Materials - CSIC) Mathew Boyce (SLAC National Accelerator Laboratory) Patrick Krkotic (European Organization for Nuclear Research) Sergio Calatroni (European Organization for Nuclear Research) Walter Wuensch (European Organization for Nuclear Research)

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