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Title: A fast continuous magnetic field measurement system based on digital signal processors

Abstract

In order to study dynamic effects in accelerator magnets, such as the decay of the magnetic field during the dwell at injection and the rapid so-called ''snapback'' during the first few seconds of the resumption of the energy ramp, a fast continuous harmonics measurement system was required. A new magnetic field measurement system, based on the use of digital signal processors (DSP) and Analog to Digital (A/D) converters, was developed and prototyped at Fermilab. This system uses Pentek 6102 16 bit A/D converters and the Pentek 4288 DSP board with the SHARC ADSP-2106 family digital signal processor. It was designed to acquire multiple channels of data with a wide dynamic range of input signals, which are typically generated by a rotating coil probe. Data acquisition is performed under a RTOS, whereas processing and visualization are performed under a host computer. Firmware code was developed for the DSP to perform fast continuous readout of the A/D FIFO memory and integration over specified intervals, synchronized to the probe's rotation in the magnetic field. C, C++ and Java code was written to control the data acquisition devices and to process a continuous stream of data. The paper summarizes the characteristics of the systemmore » and presents the results of initial tests and measurements.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
875524
Report Number(s):
FERMILAB-CONF-05-391-TD
TRN: US200623%%90
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Journal Name:
IEEE Trans.Appl.Supercond.16:1374-1377,2006
Additional Journal Information:
Conference: Presented at MT-19: 19th International Conference on Magnet Technology, Genova (Genoa), Italy, 18-23 Sep 2005
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; DATA ACQUISITION; DECAY; FERMILAB; HARMONICS; JAVA; MAGNETIC FIELDS; MAGNETS; PROCESSING; ROTATION; Accelerators

Citation Formats

Velev, G V, Carcagno, R, DiMarco, J, Kotelnikov, S, Lamm, M, Makulski, A, /Fermilab, Maroussov, V, /Purdue U., Nehring, R, Nogiec, J, Orris, D, /Fermilab, Poukhov, O, Prakoshyn, F, /Dubna, JINR, Schlabach, P, Tompkins, J C, and /Fermilab. A fast continuous magnetic field measurement system based on digital signal processors. United States: N. p., 2005. Web.
Velev, G V, Carcagno, R, DiMarco, J, Kotelnikov, S, Lamm, M, Makulski, A, /Fermilab, Maroussov, V, /Purdue U., Nehring, R, Nogiec, J, Orris, D, /Fermilab, Poukhov, O, Prakoshyn, F, /Dubna, JINR, Schlabach, P, Tompkins, J C, & /Fermilab. A fast continuous magnetic field measurement system based on digital signal processors. United States.
Velev, G V, Carcagno, R, DiMarco, J, Kotelnikov, S, Lamm, M, Makulski, A, /Fermilab, Maroussov, V, /Purdue U., Nehring, R, Nogiec, J, Orris, D, /Fermilab, Poukhov, O, Prakoshyn, F, /Dubna, JINR, Schlabach, P, Tompkins, J C, and /Fermilab. 2005. "A fast continuous magnetic field measurement system based on digital signal processors". United States. https://www.osti.gov/servlets/purl/875524.
@article{osti_875524,
title = {A fast continuous magnetic field measurement system based on digital signal processors},
author = {Velev, G V and Carcagno, R and DiMarco, J and Kotelnikov, S and Lamm, M and Makulski, A and /Fermilab and Maroussov, V and /Purdue U. and Nehring, R and Nogiec, J and Orris, D and /Fermilab and Poukhov, O and Prakoshyn, F and /Dubna, JINR and Schlabach, P and Tompkins, J C and /Fermilab},
abstractNote = {In order to study dynamic effects in accelerator magnets, such as the decay of the magnetic field during the dwell at injection and the rapid so-called ''snapback'' during the first few seconds of the resumption of the energy ramp, a fast continuous harmonics measurement system was required. A new magnetic field measurement system, based on the use of digital signal processors (DSP) and Analog to Digital (A/D) converters, was developed and prototyped at Fermilab. This system uses Pentek 6102 16 bit A/D converters and the Pentek 4288 DSP board with the SHARC ADSP-2106 family digital signal processor. It was designed to acquire multiple channels of data with a wide dynamic range of input signals, which are typically generated by a rotating coil probe. Data acquisition is performed under a RTOS, whereas processing and visualization are performed under a host computer. Firmware code was developed for the DSP to perform fast continuous readout of the A/D FIFO memory and integration over specified intervals, synchronized to the probe's rotation in the magnetic field. C, C++ and Java code was written to control the data acquisition devices and to process a continuous stream of data. The paper summarizes the characteristics of the system and presents the results of initial tests and measurements.},
doi = {},
url = {https://www.osti.gov/biblio/875524}, journal = {IEEE Trans.Appl.Supercond.16:1374-1377,2006},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2005},
month = {Thu Sep 01 00:00:00 EDT 2005}
}

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