Preface: The S1‐Global program was conceived in early 2008 with the aim of carrying out a string test of superconducting RF cavities during the Technical Design stage of the ILC (International Linear Collider) project. The proposal was to coordinate a collaboration involving various institutions around the world that would bring together eight 9‐cell L‐band cavities and associated hardware components, install them in common cryostat modules (cryomodules), and demonstrate their operation. This conceptual proposal received strong support from the GDE (Global Design Effort) and major laboratories throughout the world that partake in the GDE mission, and lead to the launch of a series of specific collaborative activities. Two TESLA‐type cavities with blade tuners were provided by Fermilab, two TESLA‐type cavities with Saclay‐tuners were provided by DESY, and four TESLA‐like cavities with slide‐jack tuners were provided by KEK. All of these cavities were industry‐made by Zanon in Italy, ACCEL/RI in Germany, AES in the United States, and MHI in Japan. Prior to being brought together for assembly into cryomodules, each of these cavities had been individually cold‐tested by the contributing laboratory. The cryomodules were provided by KEK and INFN, who collaborated closely on all aspects of the design, engineering, and assembly. One‐half of the cryomodule/cryostat was manufactured by Zanon and the other half by Hitachi in Japan. Input‐power couplers for the cavities were contributed by SLAC, DESY, and KEK. These were manufactured by CPI and Toshiba (Electron Tube). The RF waveguide components were provided by KEK and SLAC. The S1‐Global program was a world first in facilitating an international collaboration to build a segment of a superconducting linac system. The participating institutions contributed hardware and human resources equally and shared the experience of assembling a complex superconducting linac from components whose design and manufacture were coordinated remotely. While the S1‐Global program did not involve beam operation, it involved all the essential steps required prior to beam acceleration in a superconducting linac. The program successfully addressed numerous critical issues such as the plug‐compatibility of hardware components (i.e., that parts must be compatible but not necessarily identical), as well as single‐ and multiple‐cavity operation with pulsed microwave power and associated LLRF controls. We report here the progress of the S1‐Global program and the results obtained thus far.
S1-Global report / M. Akemoto, S. Fukuda, K. Hara, H. Hayano, N. Higashi, E. Kako, H. Katagiri, Y. Kojima, Y. Kondo, T. Matsumoto, S. Michizono, T. Miura, H. Nakai, H. Nakajima, K. Nakanishi, S. Noguchi, N. Ohuchi, T. Saeki, M. Satoh, T. Shidara, T. Shishido, T. Takenaka, A. Terashima, N. Toge, K. Tsuchiya, K. Watanabe, S. Yamaguchi, A. Yamamoto, Y. Yamamoto, K. Yokoya, K. Jensch, D. Kostin, L. Lilje, A. Matheisen, W.‐.D. Moeller, M. Schmoekel, P. Schilling, N. Walker, H. Weise, T. Arkan, S. Barbanotti, M. Battistoni, H. Carter, M. Champion, A. Hocker, R. Kephart, J. Kerby, D. Mitchell, Y. Pischalnikov, M. Ross, T.J. Peterson, W. Schappert, B. Smith, A. Bosotti, C. Pagani, R. Paparella, P. Pierini, C. Adolphsen, C. Nantista. - Tsukuba, Japan : High Energy Accelerator Research Organization (KEK), 2013 May.
S1-Global report
C. Pagani;
2013
Abstract
Preface: The S1‐Global program was conceived in early 2008 with the aim of carrying out a string test of superconducting RF cavities during the Technical Design stage of the ILC (International Linear Collider) project. The proposal was to coordinate a collaboration involving various institutions around the world that would bring together eight 9‐cell L‐band cavities and associated hardware components, install them in common cryostat modules (cryomodules), and demonstrate their operation. This conceptual proposal received strong support from the GDE (Global Design Effort) and major laboratories throughout the world that partake in the GDE mission, and lead to the launch of a series of specific collaborative activities. Two TESLA‐type cavities with blade tuners were provided by Fermilab, two TESLA‐type cavities with Saclay‐tuners were provided by DESY, and four TESLA‐like cavities with slide‐jack tuners were provided by KEK. All of these cavities were industry‐made by Zanon in Italy, ACCEL/RI in Germany, AES in the United States, and MHI in Japan. Prior to being brought together for assembly into cryomodules, each of these cavities had been individually cold‐tested by the contributing laboratory. The cryomodules were provided by KEK and INFN, who collaborated closely on all aspects of the design, engineering, and assembly. One‐half of the cryomodule/cryostat was manufactured by Zanon and the other half by Hitachi in Japan. Input‐power couplers for the cavities were contributed by SLAC, DESY, and KEK. These were manufactured by CPI and Toshiba (Electron Tube). The RF waveguide components were provided by KEK and SLAC. The S1‐Global program was a world first in facilitating an international collaboration to build a segment of a superconducting linac system. The participating institutions contributed hardware and human resources equally and shared the experience of assembling a complex superconducting linac from components whose design and manufacture were coordinated remotely. While the S1‐Global program did not involve beam operation, it involved all the essential steps required prior to beam acceleration in a superconducting linac. The program successfully addressed numerous critical issues such as the plug‐compatibility of hardware components (i.e., that parts must be compatible but not necessarily identical), as well as single‐ and multiple‐cavity operation with pulsed microwave power and associated LLRF controls. We report here the progress of the S1‐Global program and the results obtained thus far.
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