IBIC2015 - List of Authors (Sudmuang, P.)

Paper	Title	Page
MOPB056	Improvement of Tune Measurement System at Siam Photon Source	184
	S. Kongtawong, P. Klysubun, S. Krainara, P. Sudmuang SLRI, Nakhon Ratchasima, Thailand
	Funding: Synchrotron Light Research Institute (SLRI) (Thailand) A new tune measurement system was recently developed and implemented at Siam Photon Source (SPS) for both the booster synchrotron and the 1.2 GeV electron storage ring. A new electronic module was installed at the SPS booster for collecting the turn-by-turn signal generated when the beam is excited with white noise and fast kicker. The beam excitation was carefully studied in order to determine the optimum beam response. With this system we observed the variation of the tune during energy ramping. The measurement provides information needed to optimise the working tune and to keep it constant. At the SPS storage ring, the excitation signal was changed from swept frequency signal to frequency modulation (FM) signal to reduce the measurement time. Details of the instrumentation setup and its performance will be presented in this report.
	Poster MOPB056 [6.161 MB]
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MOPB057	Observation of Beam Loss Signal at the SPS Storage Ring	187
	S. Krainara, G.G. Hoyes, P. Klysubun, S. Kongtawong, P. Sudmuang, N. Suradet, S. Teawphet SLRI, Nakhon Ratchasima, Thailand
	Beam Loss Monitoring (BLM) system is an essential tool for observing beam instabilities and hence for machine protection. At the Siam Photon Source (SPS) storage ring, the BLM system is used to check the beam behavior due to optics perturbation, ion trapping, and vacuum leakage. A network of 50 PIN-diode detectors from Bergoz has been installed around the ring at the positions of high particle density. These positions are at the values of large betatron and dispersion functions in the machine lattice. The operational results of tune scanning verses loss rate in the resonance diagram are described. These results will be useful for improving the beam performance in terms of lifetime and beam stability.
	Poster MOPB057 [5.521 MB]
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MOPB058	Improvement of the Siam Photon Source Beam Loss Monitor System	190
	N. Suradet, G.G. Hoyes, P. Klysubun, S. Krainara, P. Sudmuang, S. Teawphet SLRI, Nakhon Ratchasima, Thailand
	A description of the newly re-built beam loss monitor (BLM) system at the Siam Photon Source (SPS) is presented. The original BLM system was designed and installed in the 1.2 GeV SPS storage ring in 2005. The main problems of this system were poor performance due to RF electromagnetic interference and the use of now obsolete data acquisition electronics. The beam loss detector used is a PIN-diode type from Bergoz. The new BLM system has been implemented using low-noise coaxial cable and an acquisition system based on NI-PXI. The hardware and software modifications incorporated into the new BLM system are presented.
	Poster MOPB058 [3.478 MB]
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Paper

Title

Page

Improvement of Tune Measurement System at Siam Photon Source

184

S. Kongtawong, P. Klysubun, S. Krainara, P. Sudmuang
SLRI, Nakhon Ratchasima, Thailand

Funding: Synchrotron Light Research Institute (SLRI) (Thailand)
A new tune measurement system was recently developed and implemented at Siam Photon Source (SPS) for both the booster synchrotron and the 1.2 GeV electron storage ring. A new electronic module was installed at the SPS booster for collecting the turn-by-turn signal generated when the beam is excited with white noise and fast kicker. The beam excitation was carefully studied in order to determine the optimum beam response. With this system we observed the variation of the tune during energy ramping. The measurement provides information needed to optimise the working tune and to keep it constant. At the SPS storage ring, the excitation signal was changed from swept frequency signal to frequency modulation (FM) signal to reduce the measurement time. Details of the instrumentation setup and its performance will be presented in this report.

Poster MOPB056 [6.161 MB]

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

MOPB057

Observation of Beam Loss Signal at the SPS Storage Ring

187

S. Krainara, G.G. Hoyes, P. Klysubun, S. Kongtawong, P. Sudmuang, N. Suradet, S. Teawphet
SLRI, Nakhon Ratchasima, Thailand

Beam Loss Monitoring (BLM) system is an essential tool for observing beam instabilities and hence for machine protection. At the Siam Photon Source (SPS) storage ring, the BLM system is used to check the beam behavior due to optics perturbation, ion trapping, and vacuum leakage. A network of 50 PIN-diode detectors from Bergoz has been installed around the ring at the positions of high particle density. These positions are at the values of large betatron and dispersion functions in the machine lattice. The operational results of tune scanning verses loss rate in the resonance diagram are described. These results will be useful for improving the beam performance in terms of lifetime and beam stability.

Poster MOPB057 [5.521 MB]

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

MOPB058

Improvement of the Siam Photon Source Beam Loss Monitor System

190

N. Suradet, G.G. Hoyes, P. Klysubun, S. Krainara, P. Sudmuang, S. Teawphet
SLRI, Nakhon Ratchasima, Thailand

A description of the newly re-built beam loss monitor (BLM) system at the Siam Photon Source (SPS) is presented. The original BLM system was designed and installed in the 1.2 GeV SPS storage ring in 2005. The main problems of this system were poor performance due to RF electromagnetic interference and the use of now obsolete data acquisition electronics. The beam loss detector used is a PIN-diode type from Bergoz. The new BLM system has been implemented using low-noise coaxial cable and an acquisition system based on NI-PXI. The hardware and software modifications incorporated into the new BLM system are presented.

Poster MOPB058 [3.478 MB]

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)