TY - GEN
T1 - Bulk niobium low-, medium-and high-β superconducting quarter wave resonators for the ALPI postaccelerator
AU - Facco, A.
AU - Sokolowski, J. S.
AU - Ben-Zvi, I.
AU - Chiaveri, E.
AU - Elkonin, B. V.
PY - 1993
Y1 - 1993
N2 - A family of three solid niobium quarter wave superconducting resonators, cooled by direct contact with liquid helium, having resonant frequencies of 80 MHz, 160 MHz and 240 MHz and optimum velocities B0 = 0.056, B0 = 0.11 and B0 = 0.17 respectively, has been designed, constructed and tested. In addition to the standard chemical surface treatment also thermal treatment at 1200°C using the titanium sublimation technique was applied. The low-beta 80 MHz resonator Q0=2. 3×108, and the quality factor was almost constant from low level up to the maximum field achieved of 4.2 MV/m at 5W. The intermediate beta 160 MHz cavity had Q0EQ2.2×108, almost constant up to the field of 5MV/m at 10W. The high beta 240 MHz resonator, after deionized water high pressure rinsing, reached Q0=3.5×108 and a maximum field of 4.7 MV/m at 6W. The 80 MHz cavity serves as a prototype for the recently started production of the low-beta section of the ALPI linac.
AB - A family of three solid niobium quarter wave superconducting resonators, cooled by direct contact with liquid helium, having resonant frequencies of 80 MHz, 160 MHz and 240 MHz and optimum velocities B0 = 0.056, B0 = 0.11 and B0 = 0.17 respectively, has been designed, constructed and tested. In addition to the standard chemical surface treatment also thermal treatment at 1200°C using the titanium sublimation technique was applied. The low-beta 80 MHz resonator Q0=2. 3×108, and the quality factor was almost constant from low level up to the maximum field achieved of 4.2 MV/m at 5W. The intermediate beta 160 MHz cavity had Q0EQ2.2×108, almost constant up to the field of 5MV/m at 10W. The high beta 240 MHz resonator, after deionized water high pressure rinsing, reached Q0=3.5×108 and a maximum field of 4.7 MV/m at 6W. The 80 MHz cavity serves as a prototype for the recently started production of the low-beta section of the ALPI linac.
UR - https://www.scopus.com/pages/publications/0027797953
M3 - Conference contribution
AN - SCOPUS:0027797953
SN - 0780312031
T3 - Proceedings of the IEEE Particle Accelerator Conference
SP - 849
EP - 857
BT - Proceedings of the IEEE Particle Accelerator Conference
PB - Publ by IEEE
T2 - Proceedings of the 15th Biennial Particle Accelerator Conference
Y2 - 17 May 1993 through 20 May 1993
ER -