Superstructures: First Cold Test and Future Applications

Conference · Mon Sep 01 04:00:00 EDT 2003

OSTI ID:820177

Sekutowicz, J; Albrecht, C; Ayvazyan, V; Bandelmann, R; Buttner, T; Castro, P; Choroba, S; Eschke, J; Faatz, B; Gossel, A; Honkavaara, K; Horst, B; Iverson, J; Jensch, K; Kaiser, H; Kammering, R; Kreps, G; Kostin, D; Lorkiewicz, J; Lange, R ; Matheisen, A; Moller, W -D; Peters, H -B; Proch, D; Rehlich, K; Schlarb, H; Schrieber, S; Reschke, D; Simrock, S; Singer, W; Singer, X; Twarowski, K; Weichert, T; Wojtkiewicz, M; Wendt, G; Zapfe, K; Liepe, M; Huening, M; Ferrario, M; Plawski, E; Pagani, C; Kneisel, P; Wu, G; Baboi, N; Thomas, C; Chen, H; Huang, W; Tang, C; Zheng, S

Superstructures, chains of superconducting multi-cell cavities (subunits) connected by e/2 long tube(s) have been proposed as an alternative layout for the TESLA main accelerator [1]. After three years of preparation, two superstructures, each made of two weakly coupled superconducting 7-cell subunits driven by a single Fundamental Power Coupler (FPC), have been installed in the Tesla Test Facility linac for beam tests. Energy stability, HOM damping, frequency and field adjustment methods were tested. The measured results confirmeSuperstructures, chains of superconducting multi-cell cavities (subunits) connected by e/2 long tube(s) have been proposed as an alternative layout for the TESLA main accelerator [1]. After three years of preparation, two superstructures, each made of two weakly coupled superconducting 7-cell subunits driven by a single Fundamental Power Coupler (FPC), have been installed in the Tesla Test Facility linac for beam tests. Energy stability, HOM damping, frequency and field adjustment methods were tested. The measured results confirmed expectation on the superstructure performance and proved that an alternative layout for the 800 GeV upgrade of the TESLA collider is feasible. We report on the test and give here an overview of its results. The tests confirmed very good damping of HOMs in superstructures and thus has opened a possible new application of this concept to high current energy recovery machines. We have built two 1.5 GHz copper models of two superstructures: 2x5-cells and 2x2-cells to prove further improvement of HOM damping. This contribution presents also measured results on these models. d expectations on the superstructure performance and proved that an alternative layout for the 800 GeV upgrade of the TESLA collider is feasible. We report on the test and give here an overview of its results.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 820177
• Report Number(s): JLAB-ACC-03-211; DOE/ER/40150-2592
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
CAVITIES
CHAINS
COPPER
DAMPING
ENERGY RECOVERY
LINEAR ACCELERATORS
PERFORMANCE
STABILITY
SUPERCONDUCTIVITY