A hybrid data acquisition system for magnetic measurements of accelerator magnets

Wang, X. ; Hafalia, R. ; Joseph, J. ; Lizarazo, J. ; Martchevsky, M. ; Sabbi, G. L.

Lawrence Berkeley National Laboratory

关键词: 75 Condensed Matter Physics, Superconductivity And Superfluidity;    43 Particle Accelerators;    Probes;    Data Acquisition Systems;    Accelerators;   

DOI  :  10.2172/1050677
RP-ID  :  LBNL-4857E
RP-ID  :  DE-AC02-05CH11231
RP-ID  :  1050677

美国|英语

来源: UNT Digital Library

【 摘 要 】

A hybrid data acquisition system was developed for magnetic measurement of superconducting accelerator magnets at LBNL. It consists of a National Instruments dynamic signal acquisition (DSA) card and two Metrolab fast digital integrator (FDI) cards. The DSA card records the induced voltage signals from the rotating probe while the FDI cards records the flux increment integrated over a certain angular step. This allows the comparison of the measurements performed with two cards. In this note, the setup and test of the system is summarized. With a probe rotating at a speed of 0.5 Hz, the multipole coefficients of two magnets were measured with the hybrid system. The coefficients from the DSA and FDI cards agree with each other, indicating that the numerical integration of the raw voltage acquired by the DSA card is comparable to the performance of the FDI card in the current measurement setup.