First demonstration of a cryocooler conduction cooled superconducting radiofrequency cavity operating at practical cw accelerating gradients

Dhuley, R. C.; Posen, S.; Geelhoed, M. I.; Prokofiev, O.; Thangaraj, J. C. T.

doi:10.1088/1361-6668/ab82f0

First demonstration of a cryocooler conduction cooled superconducting radiofrequency cavity operating at practical cw accelerating gradients

Journal Article · Mon Apr 20 00:00:00 EDT 2020 · Superconductor Science and Technology

DOI:https://doi.org/10.1088/1361-6668/ab82f0· OSTI ID:1832068

; ; Geelhoed, M. I.; Prokofiev, O.; Thangaraj, J. C. T.

Abstract

We demonstrate practical accelerating gradients on a superconducting radiofrequency (SRF) accelerator cavity with cryocooler conduction cooling, a cooling technique that does not involve the complexities of the conventional liquid helium bath. A design is first presented that enables conduction cooling an elliptical-cell SRF cavity. Implementing this design, a single cell 650 MHz Nb ₃ Sn cavity coupled using high purity aluminum thermal links to a 4 K pulse tube cryocooler generated accelerating gradients up to 6.6 MV m ⁻¹ at 100% duty cycle. The experiments were carried out with the cavity-cryocooler assembly in a simple vacuum vessel, completely free of circulating liquid cryogens. We anticipate that this cryocooling technique will make the SRF technology accessible to interested accelerator researchers who lack access to full-stack helium cryogenic systems. Furthermore, the technique can lead to SRF based compact sources of high average power electron beams for environmental protection and industrial applications. A concept of such an SRF compact accelerator is presented.

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1832068

Alternate ID(s):: OSTI ID: 1596040
OSTI ID: 23017425

Report Number(s):: FERMILAB-PUB--20-011-DI-LDRD-TD; arXiv:2001.07821

Journal Information:: Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Journal Issue: 6 Vol. 33; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

References (11)

Thermal resistance of pressed contacts of aluminum and niobium at liquid helium temperatures Dhuley, R. C.; Geelhoed, M. I.; Thangaraj, J. C. T. Cryogenics, Vol. 93 https://doi.org/10.1016/j.cryogenics.2018.06.003	journal	July 2018
Thermal study of a cryogen-less MgB2 cavity Holzbauer, J. P.; Nassiri, A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 767 https://doi.org/10.1016/j.nima.2014.08.041	journal	December 2014
Error analysis for intrinsic quality factor measurement in superconducting radio frequency resonators Melnychuk, O.; Grassellino, A.; Romanenko, A. Review of Scientific Instruments, Vol. 85, Issue 12 https://doi.org/10.1063/1.4903868	journal	December 2014
Proof-of-principle demonstration of Nb ₃ Sn superconducting radiofrequency cavities for high Q ₀ applications Posen, S.; Liepe, M.; Hall, D. L. Applied Physics Letters, Vol. 106, Issue 8 https://doi.org/10.1063/1.4913247	journal	February 2015
Parametrization of the niobium thermal conductivity in the superconducting state Koechlin, F.; Bonin, B. Superconductor Science and Technology, Vol. 9, Issue 6 https://doi.org/10.1088/0953-2048/9/6/003	journal	June 1996
Nb ₃ Sn superconducting radiofrequency cavities: fabrication, results, properties, and prospects Posen, S.; Hall, D. L. Superconductor Science and Technology, Vol. 30, Issue 3 https://doi.org/10.1088/1361-6668/30/3/033004	journal	January 2017
Unprecedented quality factors at accelerating gradients up to 45 MVm ⁻¹ in niobium superconducting resonators via low temperature nitrogen infusion Grassellino, A.; Romanenko, A.; Trenikhina, Y. Superconductor Science and Technology, Vol. 30, Issue 9 https://doi.org/10.1088/1361-6668/aa7afe	journal	August 2017
Process simulations for the LCLS-II cryogenic systems Ravindranath, V.; Bai, H.; Heloin, V. IOP Conference Series: Materials Science and Engineering, Vol. 278 https://doi.org/10.1088/1757-899X/278/1/012106	journal	December 2017
Design of a cw, low-energy, high-power superconducting linac for environmental applications Ciovati, G.; Anderson, J.; Coriton, B. Physical Review Accelerators and Beams, Vol. 21, Issue 9 https://doi.org/10.1103/PhysRevAccelBeams.21.091601	journal	September 2018
Thermal Link Design for Conduction Cooling of SRF Cavities Using Cryocoolers Dhuley, Ram C.; Kostin, Roman; Prokofiev, Oleg IEEE Transactions on Applied Superconductivity, Vol. 29, Issue 5 https://doi.org/10.1109/TASC.2019.2901252	journal	August 2019
Electron Accelerators for Environmental Protection Chmielewski, Andrzej G. Reviews of Accelerator Science and Technology, Vol. 04, Issue 01 https://doi.org/10.1142/S1793626811000501	journal	January 2011

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