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Title: Energy Upgrade of the Siam Photon Source

Abstract

The energy upgrade of the storage ring is part of the plans to develop x-ray production capability of the Siam Photon Source. Simulations have been carried out. The bending magnet power supply has been replaced. Energy of the injected 1 GeV beam from the injector is then ramped up 20% in the storage ring. Studies for modification of bending magnet poles have been done to evaluate possibility of further increasing the beam energy to 1.4 GeV in the future. Studies of the energy upgrade plan and details of energy ramping process, together with beam measurements are presented.

Authors:
;  [1];  [2]; ; ; ; ; ; ; ; ; ; ;  [1]
  1. National Synchrotron Research Center, P.O. Box 93, Nakhon Ratchasima, 30000 (Thailand)
  2. (Thailand)
Publication Date:
OSTI Identifier:
21052584
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436005; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM BENDING MAGNETS; BEAM PRODUCTION; COMPUTERIZED SIMULATION; GEV RANGE; PHOTON BEAMS; PHOTONS; STORAGE RINGS; THAILAND; X RADIATION

Citation Formats

Rugmai, S., Rujirawat, S., School of Physics, Suranaree University of Technology, 111 University Avenue, Muang Distrct, Nakhon Ratchasima, 30000, Hoyes, G. G., Prawanta, S., Kwankasem, A., Siriwattanapitoon, S., Suradet, N., Pimol, P., Junthong, N., Boonsuya, S., Janpuang, P., Prawatsri, P., and Klysubun, P. Energy Upgrade of the Siam Photon Source. United States: N. p., 2007. Web. doi:10.1063/1.2436005.
Rugmai, S., Rujirawat, S., School of Physics, Suranaree University of Technology, 111 University Avenue, Muang Distrct, Nakhon Ratchasima, 30000, Hoyes, G. G., Prawanta, S., Kwankasem, A., Siriwattanapitoon, S., Suradet, N., Pimol, P., Junthong, N., Boonsuya, S., Janpuang, P., Prawatsri, P., & Klysubun, P. Energy Upgrade of the Siam Photon Source. United States. doi:10.1063/1.2436005.
Rugmai, S., Rujirawat, S., School of Physics, Suranaree University of Technology, 111 University Avenue, Muang Distrct, Nakhon Ratchasima, 30000, Hoyes, G. G., Prawanta, S., Kwankasem, A., Siriwattanapitoon, S., Suradet, N., Pimol, P., Junthong, N., Boonsuya, S., Janpuang, P., Prawatsri, P., and Klysubun, P. Fri . "Energy Upgrade of the Siam Photon Source". United States. doi:10.1063/1.2436005.
@article{osti_21052584,
title = {Energy Upgrade of the Siam Photon Source},
author = {Rugmai, S. and Rujirawat, S. and School of Physics, Suranaree University of Technology, 111 University Avenue, Muang Distrct, Nakhon Ratchasima, 30000 and Hoyes, G. G. and Prawanta, S. and Kwankasem, A. and Siriwattanapitoon, S. and Suradet, N. and Pimol, P. and Junthong, N. and Boonsuya, S. and Janpuang, P. and Prawatsri, P. and Klysubun, P.},
abstractNote = {The energy upgrade of the storage ring is part of the plans to develop x-ray production capability of the Siam Photon Source. Simulations have been carried out. The bending magnet power supply has been replaced. Energy of the injected 1 GeV beam from the injector is then ramped up 20% in the storage ring. Studies for modification of bending magnet poles have been done to evaluate possibility of further increasing the beam energy to 1.4 GeV in the future. Studies of the energy upgrade plan and details of energy ramping process, together with beam measurements are presented.},
doi = {10.1063/1.2436005},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • A short history of the SIAM Photon Source in Thailand is described. The facility is based on the 1 GeV storage ring obtained from the SORTEC consortium in Japan. After a redesign to include insertion straight sections it produced the first light in December 2001 and the first beam line became operational in early 2002. Special difficulties appear when a synchrotron light facility is obtained by donation, which have mostly to do with the absence of human resource development that elsewhere is commonly accomplished during design and construction. Additional problems arise by the distance of a developing country like Thailandmore » from the origin of technical parts of the donation. A donation does not provide time to generate local capabilities or include in the technical design locally obtainable parts. This makes future developments, repairs and maintenance more time consuming, difficult and expensive than it should be. In other cases, parts of components are proprietary or obsolete or both which requires redesign and engineering at a time when the replacement part should be available to prevent stoppage of operation.The build-up of a user community is very difficult, especially when the radiation spectrum is confined to the VUV regime. Most of scientific interest these days is focused on the x-ray regime. Due to its low beam energy, the SIAM storage ring did not produce useful x-ray intensities and we are therefore in the midst of an upgrade to produce harder radiation. The first step has been achieved with a 20% increase of energy to 1.2 GeV. This step shifts the critical photon energy of bending magnet radiation from 800 eV to 1.4 keV providing useful radiation up to 7 keV. A XAS-beam line has been completed in 2005 and experimentation is very active by now. The next step is to install a 6.4 T wavelength shifter by the end of 2006 resulting in a critical photon energy of 6.15 keV. Further upgrades are planed for the comming years.« less
  • An undulator for production of intense soft x-rays has been designed for the Siam Photon Source. The construction of the undulator has been completed. It is now being characterized and prepared for installation. The device, named U60, is a pure permanent magnet planar undulator, consisting of 41 magnetic periods, with 60 mm period length. Utilization of the undulator radiation in the photon energy range of 30 - 900 eV is expected. The design studies of the magnetic structure, including investigation of perturbations arising from the magnetic field of the device, their effects on the SPS storage ring and compensation schemesmore » are described. A magnetic measurement system has been constructed for magnetic characterization of the device. Partial results of magnetic measurements are presented.« less
  • The Advanced Photon Source (APS) is a third-generation synchrotron radiation source operating at 7 GeV that has been in operation for over 10 years. In that time, the emittance has been improved from 8 to 3.1 nm, which is close to the practical minimum. Recently, APS undertook an intensive exploration of potential upgrades, including options for a replacement storage ring or Energy Recovery Linac (ERL) injector. Our conclusion was that only the ERL would provide a dramatically new capability. This paper discusses the potential performance available from an ERL upgrade to the APS and reviews the challenges of delivering thismore » performance.« less
  • The Advanced Photon Source (APS) is a third-generation storage-ring-based x-ray source that has been operating for more than 13 years and is enjoying a long period of stable, reliable operation. However, major accelerator upgrades are being investigated in order to maintain scientific relevance into the future. One very promising possibility is the use of an energy recovery linac (ERL). In this option, APS would transition from a source based on a stored electron beam to one based on a continuously generated high-brightness electron beam from a linac. Such a source promises dramatically improved brightness and transverse coherence compared to third-generationmore » storage rings. We present a new design for an ERL upgrade that incorporates very long insertion devices. We show that operation at high electron beam energy provides the promise of extremely high brightness for hard x-rays. We also show results of the first start-to-end simulations of an ERL-based x-ray source.« less
  • This paper will describe and analyze the rf beam position monitor (RFBPM) front-end upgrade for the Advanced Photon Source (APS) storage ring. This system is based on amplitude-to-phase (AM/PM) conversion monopulse receivers. The design and performance of the existing BPM front-end will be considered as the base-line design for the continuous effort to improve and upgrade the APS beam diagnostics. The upgrade involves redesigning the in-tunnel filter comparator units to improve insertion loss, return loss, and band-pass filter-matching that presently limit the different fill patterns used at APS. {copyright} {ital 1998 American Institute of Physics.}