Title :
Superconducting resonator as beam-induced signal pickup
Author :
Sharamentov, S.I. ; Clifft, B.E. ; Ostroumov, P.N. ; Pardo, R.C. ; Zinkann, G.P.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
The first demonstration of a superconducting resonator (SCR), installed for beam acceleration, to detect the arrival time of a beam bunch is described. The detecting resonator is operated at very low field level, comparable to the field induced by the beam pulse traversing the cavity so as to maintain an acceptable response characteristic for this high-Q device. Due to this, the RF field in an SCR is always a superposition of a "pure" (or reference) RF and the beam-induced signal. A new method of circular phase rotation (CPR), allowing extraction of the beam phase information from the composite RF field was developed. Arrival time phase determination with CPR is better than one degree for a beam current of 100 nA. The electronics design is described and example data are presented.
Keywords :
accelerator RF systems; beam handling techniques; linear accelerators; nuclear electronics; particle beam bunching; particle beam diagnostics; superconducting resonators; arrival time phase determination; beam acceleration; beam bunch arrival time; beam current; beam phase information; beam-induced signal pickup; circular phase rotation; composite RF field; electronics design; high-Q device; linac; low field level; superconducting resonator; Acceleration; Linear accelerators; Optical beams; Optical resonators; Particle beam measurements; Particle beams; Phase detection; RF signals; Radio frequency; Thyristors;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289142
