STATUS OF THE LANL ACTIVITIES IN THE FIELD OF RF SUPERCONDUCTIVITY.

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Since the last workshop we have tested six b=0.64, 700 MHz, 5-cell elliptical superconducting cavities in collaboration with JLAB in vertical cryostats. All the cavities exceeded the requirements for Accelerator Production of Tritium (APT) (Q0 = 5 x 109 at Eacc = 5 MV/m) with ample margin. The low-field Q0 at 2 K was 2-3 x 1010 and the maximum accelerating field reached 12 MV/m, which corresponds to peak electric and magnetic fields of 41 MV/m and 835 Oe, respectively. Power couplers have also been tested in a test bench up to over 1 MW. Since the APT project has ... continued below

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7 p.

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Tajima, T. (Tsuyoshi); Roybal, P. L. (Phillip L.); Chan, K. D. (Kwok-Chi D.); Schmierer, E. N. (Eric N.); Edwards, R. L. (Randall L.); Schrage, D. L. (Dale L.) et al. January 1, 2001.

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Since the last workshop we have tested six b=0.64, 700 MHz, 5-cell elliptical superconducting cavities in collaboration with JLAB in vertical cryostats. All the cavities exceeded the requirements for Accelerator Production of Tritium (APT) (Q0 = 5 x 109 at Eacc = 5 MV/m) with ample margin. The low-field Q0 at 2 K was 2-3 x 1010 and the maximum accelerating field reached 12 MV/m, which corresponds to peak electric and magnetic fields of 41 MV/m and 835 Oe, respectively. Power couplers have also been tested in a test bench up to over 1 MW. Since the APT project has transitioned to Advanced Accelerator Applications (AAA) project, a new type of superconducting accelerating structure called spoke cavity emerged as an excellent candidate for the low energy sections between the RFQ and the elliptical cavities. We tested a b=0.29, 340 MHz, 2-gap spoke cavity on loan from Argonne National Laboratory. The results showed Q0 = 2 x 109 at low fields and a maximum accelerating field Eacc = 12.5 MV/m at 4 K. At 5 MV/m, the Q0 was 1.5 x 109. Encouraged by these results, we started fabricating some spoke cavities and are planning to test one of them in the beamline of LEDA (Low Energy Demonstration Accelerator) in the future.

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7 p.

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  • "Submitted to: 10th Workshop on RF Superconductivity, Tsukuba, Japan September 6-11, 100l."

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  • Report No.: LA-UR-01-4988
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975731
  • Archival Resource Key: ark:/67531/metadc928408

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:08 p.m.

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Tajima, T. (Tsuyoshi); Roybal, P. L. (Phillip L.); Chan, K. D. (Kwok-Chi D.); Schmierer, E. N. (Eric N.); Edwards, R. L. (Randall L.); Schrage, D. L. (Dale L.) et al. STATUS OF THE LANL ACTIVITIES IN THE FIELD OF RF SUPERCONDUCTIVITY., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc928408/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.