Measurements on a superconducting X-band structure for linear accelerator application
Rf tests of a superconducting disk-loaded waveguide are reported. A three-cell 8-GHz structure, fabricated of two pieces of bulk niobium, was excited to high-field levels at temperatures below 1.8$sup 0$K, and the cavity was operated in a $pi$/2 standing wave mode. Peak electric fields of 37 MV/m, peak magnetic fields of 590 Oe, and effective accelerating fields of 8.0 MV/m were generated at a microwave power level of 8 W/m. The lowest surface resistance that could be obtained was 44 n$Omega$ corresponding to a Q factor of 4x10$sup 9$ at 1.3$sup 0$K. These results were achieved using electropolishing and annealing at 1400$sup 0$C under moderate vacuum conditions. The fields are limited by fast magnetic thermal breakdown. No electron loading was observed. (AIP)
- Research Organization:
- Fachbereich Physik, Gesamthochschule Wuppertal, Hofkamp 82, 56 Wuppertal 1, West Germany
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-026923
- OSTI ID:
- 4010158
- Journal Information:
- J. Appl. Phys., v. 47, no. 3, pp. 1134-1138, Other Information: Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preliminary studies of Electric and Magnetic Field Effects in Superconducting Niobium Cavities
TH-C-12A-08: New Compact 10 MV S-Band Linear Accelerator: 3D Finite-Element Design and Monte Carlo Dose Simulations
Related Subjects
N42220 -Engineering-Facilities & Equipment-Cryogenic & Superconducting Equipment & Devices
430300* -Particle Accelerators-Auxiliaries & Components
*LINEAR ACCELERATORS- SUPERCONDUCTING CAVITY RESONATORS
ANNEALING
ELECTRIC FIELDS
ELECTROPOLISHING
MAGNETIC FIELDS
MICROWAVE EQUIPMENT
NIOBIUM
QUALITY FACTOR
STANDING WAVES
WAVEGUIDES