Title :
Measured transverse coupling impedance of RHIC injection and abort kickers
Author :
Hahn, H. ; Davino, D.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
Concerns regarding possible transverse instabilities in RHIC and the SNS pointed to the need for measurements of the transverse coupling impedance of ring components. The impedance of the RHIC injection and abort kicker was measured using the conventional method based on the S 21 forward transmission coefficient. A commercial 450 Ω twin-wire Lecher line were used and the data was interpreted via the log-formula. All measurements were performed in test stands fully representing operational conditions including pulsed power supplies and connecting cables. The measured values for the transverse coupling impedance in kick direction and perpendicular to it are comparable in magnitude, but differ from Handbook predictions
Keywords :
accelerator magnets; colliding beam accelerators; electromagnets; ion accelerators; ion beams; particle beam diagnostics; particle beam stability; storage rings; synchrotrons; 450 ohm; RHIC; abort kickers; forward transmission coefficient; injection kickers; log-formula; operational conditions; pulsed power supplies; ring components; transverse coupling impedance; transverse instabilities; twin-wire Lecher line; Cables; Couplings; Frequency estimation; Frequency measurement; Impedance measurement; Performance evaluation; Pulse measurements; Pulsed power supplies; Testing; Wires;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987197
