Development of a prototype superconducting radio-frequency cavity for conduction-cooled accelerators
Abstract
The higher efficiency of superconducting radio-frequency (SRF) cavities compared to normalconducting ones enables the development of high-energy continuous-wave linear accelerators (linacs). Recent progress in the development of high-quality Nb3Sn film coatings along with the availability of cryocoolers with high cooling capacity at 4 K makes it feasible to operate SRF cavities cooled by thermal conduction at relevant accelerating gradients for use in accelerators. A possible use of conduction-cooled SRF linacs is for environmental applications, requiring electron beams with energy of 1 10 MeV and 1 MW of power. We have designed a 915 MHz SRF linac for such an application and developed a prototype single-cell cavity to prove the proposed design by operating it with cryocoolers at the accelerating gradient required for 1 MeV energy gain. The cavity has a ~ 3 μm thick Nb3Sn film on the inner surface, deposited on a ~ 4 mm thick bulk Nb substrate and a bulk ~ 7 mm thick Cu outer shell with three Cu attachment tabs. The cavity was tested up to a peak surface magnetic field of 53 mT in liquid He at 4.3 K. A horizontal test cryostat was designed and built to test the cavity cooled with threemore »
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- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Accelerator R&D and Production (ARDAP)
- OSTI Identifier:
- 2325389
- Alternate Identifier(s):
- OSTI ID: 1970174
- Report Number(s):
- JLAB-ACC-23-3750; DOE/OR/23177-5696
Journal ID: ISSN 2469-9888; PRABCJ; 044701
- Grant/Contract Number:
- AC05-06OR23177; SC0009960
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 26 Journal Issue: 4; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; cryogenic technology; radio frequency calculations; superconducting RF; materials analysis; modifications by accelerators
Citation Formats
Ciovati, G., Anderson, J., Balachandran, S., Cheng, G., Coriton, B., Daly, E., Dhakal, P., Gurevich, A., Hannon, F., Harding, K., Holland, L., Marhauser, F., McLaughlin, K., Packard, D., Powers, T., Pudasaini, U., Rathke, J., Rimmer, R., Schultheiss, T., Vennekate, H., and Vollmer, D. Development of a prototype superconducting radio-frequency cavity for conduction-cooled accelerators. United States: N. p., 2023.
Web. doi:10.1103/PhysRevAccelBeams.26.044701.
Ciovati, G., Anderson, J., Balachandran, S., Cheng, G., Coriton, B., Daly, E., Dhakal, P., Gurevich, A., Hannon, F., Harding, K., Holland, L., Marhauser, F., McLaughlin, K., Packard, D., Powers, T., Pudasaini, U., Rathke, J., Rimmer, R., Schultheiss, T., Vennekate, H., & Vollmer, D. Development of a prototype superconducting radio-frequency cavity for conduction-cooled accelerators. United States. https://doi.org/10.1103/PhysRevAccelBeams.26.044701
Ciovati, G., Anderson, J., Balachandran, S., Cheng, G., Coriton, B., Daly, E., Dhakal, P., Gurevich, A., Hannon, F., Harding, K., Holland, L., Marhauser, F., McLaughlin, K., Packard, D., Powers, T., Pudasaini, U., Rathke, J., Rimmer, R., Schultheiss, T., Vennekate, H., and Vollmer, D. Mon .
"Development of a prototype superconducting radio-frequency cavity for conduction-cooled accelerators". United States. https://doi.org/10.1103/PhysRevAccelBeams.26.044701.
@article{osti_2325389,
title = {Development of a prototype superconducting radio-frequency cavity for conduction-cooled accelerators},
author = {Ciovati, G. and Anderson, J. and Balachandran, S. and Cheng, G. and Coriton, B. and Daly, E. and Dhakal, P. and Gurevich, A. and Hannon, F. and Harding, K. and Holland, L. and Marhauser, F. and McLaughlin, K. and Packard, D. and Powers, T. and Pudasaini, U. and Rathke, J. and Rimmer, R. and Schultheiss, T. and Vennekate, H. and Vollmer, D.},
abstractNote = {The higher efficiency of superconducting radio-frequency (SRF) cavities compared to normalconducting ones enables the development of high-energy continuous-wave linear accelerators (linacs). Recent progress in the development of high-quality Nb3Sn film coatings along with the availability of cryocoolers with high cooling capacity at 4 K makes it feasible to operate SRF cavities cooled by thermal conduction at relevant accelerating gradients for use in accelerators. A possible use of conduction-cooled SRF linacs is for environmental applications, requiring electron beams with energy of 1 10 MeV and 1 MW of power. We have designed a 915 MHz SRF linac for such an application and developed a prototype single-cell cavity to prove the proposed design by operating it with cryocoolers at the accelerating gradient required for 1 MeV energy gain. The cavity has a ~ 3 μm thick Nb3Sn film on the inner surface, deposited on a ~ 4 mm thick bulk Nb substrate and a bulk ~ 7 mm thick Cu outer shell with three Cu attachment tabs. The cavity was tested up to a peak surface magnetic field of 53 mT in liquid He at 4.3 K. A horizontal test cryostat was designed and built to test the cavity cooled with three Gifford-McMahon cryocoolers. The rf tests of the conduction-cooled cavity, performed at General Atomics, achieved a peak surface magnetic field of 50 mT and stable operation was possible with up to 18.5 W of rf heat load. The peak-to-peak frequency shift due to microphonics was 26 Hz. These results represent the highest peak surface magnetic field achieved in a conduction-cooled SRF cavity to date and meet the requirements for a 1 MeV energy gain.},
doi = {10.1103/PhysRevAccelBeams.26.044701},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 26,
place = {United States},
year = {Mon Apr 17 00:00:00 EDT 2023},
month = {Mon Apr 17 00:00:00 EDT 2023}
}
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