Title :
Cold tests of a spoke cavity prototype for RIA
Author :
Kelly, M.P. ; Shepard, K.W. ; Kedzie, M. ; Zinkann, G.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
We report results of high-power pulse conditioning of a superconducting niobium spoke cavity for the RIA (Rare Isotope Accelerator) project. The 350 MHz, v/c=0.4 structure has a design accelerating gradient of 5 MV/m. With the recent operation of a 5-kW, 350 MHz amplifier and a series of pulse and helium conditioning operations, the design goal has been met with an input power of less than 10 W at T = 4.3 K. Experimental measurements of the cavity mechanical and vibrational properties and measurements of X-rays resulting from field emission are presented. Results of additional cavity surface reprocessing using newly installed chemical polish and high-pressure rinse facilities will also be reported
Keywords :
accelerator cavities; ion accelerators; linear accelerators; polishing; superconducting cavity resonators; 10 W; 350 MHz; 4.3 K; 5 kW; Nb; RIA; Rare Isotope Accelerator; X-rays; cavity surface reprocessing; chemical polish; field emission; high-pressure rinse; mechanical properties; superconducting Nb spoke cavity; vibrational properties; Acceleration; Isotopes; Mechanical variables measurement; Niobium; Power measurement; Prototypes; Pulse amplifiers; Pulse measurements; Testing; Vibration measurement;
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.2001.986572
