ICALEPCS2017 - List of Authors (Singh, R.)

Paper	Title	Page
TUPHA075	A MicroTCA based Beam Position Monitoring System at CRYRING@ESR	585
	P.B. Miedzik, H. Bräuning, T. Hoffmann, A. Reiter, R. Singh GSI, Darmstadt, Germany
	At FAIR the commissioning of the re-assembled CRYRING accelerator, formerly hosted by Manne Siegbahn Laboratory Stockholm, is currently in progress. This compact low energy heavy ion synchrotron and experimental storage ring will be the main instrument for an extensive research programme [1] as well as a testing platform for the future beam instrumentation and control system concepts decided on for FAIR. Besides many other measurement systems CRYRING is equipped with 18 beam position monitors (BPM), for which a new data acquisition system (DAQ) was developed. Based on the upcoming MicroTCA form factor in combination with FPGA mezzanine card (FMC) technology the DAQ system was designed to be state-of-the-art, reliable, modular and of high performance. Testing 'Open Hardware', here the ADC FMCs and FMC carrier boards, was another intention of that concept. The DAQ layout and obstacles that had to be overcome as well as first measurements will be presented.
	Poster TUPHA075 [18.571 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA075
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THMPA02	Investigations of Spatial Process Model for the Closed Orbit Feedback System at the Sis18 Synchrotron at GSI	1301
	S.H. Mirza, P. Forck, H. Klingbeil, R. Singh GSI, Darmstadt, Germany H. Klingbeil TEMF, TU Darmstadt, Darmstadt, Germany
	Funding: The work is supported by the Deutscher Akademischer Austauschdienst under contact No. 91605207 A closed orbit feedback system is under development at the GSI SIS18 synchrotron for usage during the whole acceleration cycle including the acceleration ramp. Singular value decomposition (SVD) is the most widely used technique in global closed orbit correction for eigenmode decomposition, mode selection and pseudo-inversion of Orbit Response Matrix (ORM) for robust calculation of corrector magnet strengths. A new faster inversion technique based upon Discrete Fourier Transform (DFT) has been proposed for SIS18 ORM exploiting the Circulant symmetry, a class of matrices which can be diagonalized by the DFT using only one row or column of the matrix. The existence of a clear relationship between SVD modes and singular values to DFT modes and coefficients for such matrices has been described. The DFT based decomposition of Circulant ORM gives hints on physical interpretation of SVD and DFT modes of perturbed closed orbit in a synchrotron. As a first practical application, DFT modes were used to provide robustness against sensor failures such as one or two malfunctioning BPMs.
	Slides THMPA02 [1.762 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A MicroTCA based Beam Position Monitoring System at CRYRING@ESR

585

P.B. Miedzik, H. Bräuning, T. Hoffmann, A. Reiter, R. Singh
GSI, Darmstadt, Germany

At FAIR the commissioning of the re-assembled CRYRING accelerator, formerly hosted by Manne Siegbahn Laboratory Stockholm, is currently in progress. This compact low energy heavy ion synchrotron and experimental storage ring will be the main instrument for an extensive research programme [1] as well as a testing platform for the future beam instrumentation and control system concepts decided on for FAIR. Besides many other measurement systems CRYRING is equipped with 18 beam position monitors (BPM), for which a new data acquisition system (DAQ) was developed. Based on the upcoming MicroTCA form factor in combination with FPGA mezzanine card (FMC) technology the DAQ system was designed to be state-of-the-art, reliable, modular and of high performance. Testing 'Open Hardware', here the ADC FMCs and FMC carrier boards, was another intention of that concept. The DAQ layout and obstacles that had to be overcome as well as first measurements will be presented.

Poster TUPHA075 [18.571 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA075

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THMPA02

Investigations of Spatial Process Model for the Closed Orbit Feedback System at the Sis18 Synchrotron at GSI

1301

S.H. Mirza, P. Forck, H. Klingbeil, R. Singh
GSI, Darmstadt, Germany
H. Klingbeil
TEMF, TU Darmstadt, Darmstadt, Germany

Funding: The work is supported by the Deutscher Akademischer Austauschdienst under contact No. 91605207
A closed orbit feedback system is under development at the GSI SIS18 synchrotron for usage during the whole acceleration cycle including the acceleration ramp. Singular value decomposition (SVD) is the most widely used technique in global closed orbit correction for eigenmode decomposition, mode selection and pseudo-inversion of Orbit Response Matrix (ORM) for robust calculation of corrector magnet strengths. A new faster inversion technique based upon Discrete Fourier Transform (DFT) has been proposed for SIS18 ORM exploiting the Circulant symmetry, a class of matrices which can be diagonalized by the DFT using only one row or column of the matrix. The existence of a clear relationship between SVD modes and singular values to DFT modes and coefficients for such matrices has been described. The DFT based decomposition of Circulant ORM gives hints on physical interpretation of SVD and DFT modes of perturbed closed orbit in a synchrotron. As a first practical application, DFT modes were used to provide robustness against sensor failures such as one or two malfunctioning BPMs.

Slides THMPA02 [1.762 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPA02

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)