IPAC2015 - List of Keywords (brilliance)

Paper	Title	Other Keywords	Page
MOPWA009	Channeling Radiation Experiment at Fermilab ASTA	electron, photon, experiment, detector	95
	D. Mihalcea, P. Piot Northern Illinois University, DeKalb, Illinois, USA D.R. Edstrom, P. Piot, T. Sen Fermilab, Batavia, Illinois, USA W.D. Rush KU, Lawrence, Kansas, USA
	Electron beams with moderate energy ranging from 4 to 50 MeV can be used to produce x-rays through the Channeling Radiation (CR) mechanism. Typically, the x-ray spectrum from these sources extends up to 140 keV and this range covers the demand for most practical applications. The parameters of the electron beam determine the spectral brilliance of the x-ray source. The electron beam produced at the Fermilab new facility Advanced Superconducting Test Accelerator (ASTA) meets the requirements to assemble an experimental high brilliance CR x-ray source. In the first stage of the experiment the energy of the beam is 20 MeV and due to the very low emittance (100 nm) at low bunch charge (20 pC) the expected average brilliance of the x-ray source is 0.8x10⁷ photons/[s-(mm-mrad)²-0.1%BW]. In the second stage of the experiment the beam energy will be increased to 50 MeV and consequently the average brilliance will be 4.8x10⁸ photons/[s-(mm-mrad)²-0.1%BW]. Also, the x-ray spectrum will be extended from about 30 keV to 140 keV.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA009
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MOPTY071	FPGA Based Global Orbit Feedback in the Taiwan Light Source	feedback, controls, FPGA, interface	1100
	C.H. Kuo, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, D. Lee NSRRC, Hsinchu, Taiwan
	The global orbit feedback for the 1.5 GeV electron storage ring of TLS has been operated more than ten years. This system uses general processors to control feedback loop with 1 kHz rate. It is very important for various operation of storage ring now, but some hardware components could have been out of stock in the future. As a prototype, a FPGA based fast global orbit feedback at a 10 kHz data acquisition rate has been developed. A micro-TCA liked platform with FPGA board is used to implement control algorithm and acquire BPM data from Libera Brillance. The correction algorithm is written in VHDL and connected to power supply with AURORA digital links. The system architecture will be discussed in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY071
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TUPWA064	Study of Inherent Potential for Emittance Reduction at the SPring-8 Storage Ring	optics, emittance, storage-ring, photon	1573
	Y. Shimosaki JASRI/SPring-8, Hyogo-ken, Japan
	A design study for an upgrade project of the SPring-8, the SPring-8-II, is in progress, which is a full-scale major lattice modification. Besides the design study for the SPring-8-II, an inherent potential of achieving much higher brilliance than that of the present SPring-8 has been explored for the general evaluation. In this paper, the evaluation of the inherent potential for the SPring-8, not for the SPring-8-II, in terms of increasing the brilliance is discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWA064
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THPF020	Upgrade of the HSI-RFQ at GSI to Fulfill the FAIR Requirements	rfq, simulation, multipole, linac	3727
	M. Baschke, H. Podlech IAP, Frankfurt am Main, Germany W.A. Barth GSI, Darmstadt, Germany
	In Darmstadt/Germany the existing accelerator facility GSI is expanding to one of the biggest joint research projects worldwide: FAIR, a new antiproton and ion research facility with so far unmatched intensities and quality. The existing accelerators will be used as pre-accelerators and therefor need to be upgraded. In a first step the 36 MHz-HSI-RFQ for high current beams will get new electrodes to fulfill the FAIR requirements. First simulation results for capacity and multipole momentums will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF020
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THPF035	Stripping of High Intensity Heavy-Ion Beams in a Pulsed Gas Stripper Device at 1.4 MeV/u	ion, emittance, dipole, acceleration	3773
	P. Scharrer, W.A. Barth, Ch.E. Düllmann, J. Khuyagbaatar HIM, Mainz, Germany W.A. Barth, M. Bevcic, Ch.E. Düllmann, L. Groening, K.P. Horn, E. Jäger, J. Khuyagbaatar, J. Krier, A. Yakushev GSI, Darmstadt, Germany Ch.E. Düllmann Mainz University, Mainz, Germany
	As part of an injector system for FAIR, the GSI UNILAC has to meet high demands in terms of beam brilliance at a low duty factor. To accomplish this goal an extensive upgrade program has started. To increase the beam intensity behind the UNILAC, it is aimed to increase the efficiency of the 1.4 MeV/u gas stripper. A modification of the stripper setup was developed to replace the N2-jet with a pulsed gas injection, synchronized with the transit of the beam pulse. The pulsed gas injection lowers the gas load for the differential pumping system, rendering possible the use of other promising gas targets. In recent measurements the performance of the modified setup was tested using an 238U-beam with various stripper media, including H2, He, and N2. The data provide a systematic basis for an improved understanding of slow heavy ions passing through gaseous media. The stripping performance of the current N2-jet was excelled by using H2 at increased gas densities, enabled by the new pulsed gas cell.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF035
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Paper

Title

Other Keywords

Page

MOPWA009

Channeling Radiation Experiment at Fermilab ASTA

electron, photon, experiment, detector

95

D. Mihalcea, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
D.R. Edstrom, P. Piot, T. Sen
Fermilab, Batavia, Illinois, USA
W.D. Rush
KU, Lawrence, Kansas, USA

Electron beams with moderate energy ranging from 4 to 50 MeV can be used to produce x-rays through the Channeling Radiation (CR) mechanism. Typically, the x-ray spectrum from these sources extends up to 140 keV and this range covers the demand for most practical applications. The parameters of the electron beam determine the spectral brilliance of the x-ray source. The electron beam produced at the Fermilab new facility Advanced Superconducting Test Accelerator (ASTA) meets the requirements to assemble an experimental high brilliance CR x-ray source. In the first stage of the experiment the energy of the beam is 20 MeV and due to the very low emittance (100 nm) at low bunch charge (20 pC) the expected average brilliance of the x-ray source is 0.8x10⁷ photons/[s-(mm-mrad)²-0.1%BW]. In the second stage of the experiment the beam energy will be increased to 50 MeV and consequently the average brilliance will be 4.8x10⁸ photons/[s-(mm-mrad)²-0.1%BW]. Also, the x-ray spectrum will be extended from about 30 keV to 140 keV.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA009

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MOPTY071

FPGA Based Global Orbit Feedback in the Taiwan Light Source

feedback, controls, FPGA, interface

1100

C.H. Kuo, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, D. Lee
NSRRC, Hsinchu, Taiwan

The global orbit feedback for the 1.5 GeV electron storage ring of TLS has been operated more than ten years. This system uses general processors to control feedback loop with 1 kHz rate. It is very important for various operation of storage ring now, but some hardware components could have been out of stock in the future. As a prototype, a FPGA based fast global orbit feedback at a 10 kHz data acquisition rate has been developed. A micro-TCA liked platform with FPGA board is used to implement control algorithm and acquire BPM data from Libera Brillance. The correction algorithm is written in VHDL and connected to power supply with AURORA digital links. The system architecture will be discussed in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY071

Export •

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

TUPWA064

Study of Inherent Potential for Emittance Reduction at the SPring-8 Storage Ring

optics, emittance, storage-ring, photon

1573

Y. Shimosaki
JASRI/SPring-8, Hyogo-ken, Japan

A design study for an upgrade project of the SPring-8, the SPring-8-II, is in progress, which is a full-scale major lattice modification. Besides the design study for the SPring-8-II, an inherent potential of achieving much higher brilliance than that of the present SPring-8 has been explored for the general evaluation. In this paper, the evaluation of the inherent potential for the SPring-8, not for the SPring-8-II, in terms of increasing the brilliance is discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWA064

Export •

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

THPF020

Upgrade of the HSI-RFQ at GSI to Fulfill the FAIR Requirements

rfq, simulation, multipole, linac

3727

M. Baschke, H. Podlech
IAP, Frankfurt am Main, Germany
W.A. Barth
GSI, Darmstadt, Germany

In Darmstadt/Germany the existing accelerator facility GSI is expanding to one of the biggest joint research projects worldwide: FAIR, a new antiproton and ion research facility with so far unmatched intensities and quality. The existing accelerators will be used as pre-accelerators and therefor need to be upgraded. In a first step the 36 MHz-HSI-RFQ for high current beams will get new electrodes to fulfill the FAIR requirements. First simulation results for capacity and multipole momentums will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF020

Export •

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

THPF035

Stripping of High Intensity Heavy-Ion Beams in a Pulsed Gas Stripper Device at 1.4 MeV/u

ion, emittance, dipole, acceleration

3773

P. Scharrer, W.A. Barth, Ch.E. Düllmann, J. Khuyagbaatar
HIM, Mainz, Germany
W.A. Barth, M. Bevcic, Ch.E. Düllmann, L. Groening, K.P. Horn, E. Jäger, J. Khuyagbaatar, J. Krier, A. Yakushev
GSI, Darmstadt, Germany
Ch.E. Düllmann
Mainz University, Mainz, Germany

As part of an injector system for FAIR, the GSI UNILAC has to meet high demands in terms of beam brilliance at a low duty factor. To accomplish this goal an extensive upgrade program has started. To increase the beam intensity behind the UNILAC, it is aimed to increase the efficiency of the 1.4 MeV/u gas stripper. A modification of the stripper setup was developed to replace the N2-jet with a pulsed gas injection, synchronized with the transit of the beam pulse. The pulsed gas injection lowers the gas load for the differential pumping system, rendering possible the use of other promising gas targets. In recent measurements the performance of the modified setup was tested using an 238U-beam with various stripper media, including H2, He, and N2. The data provide a systematic basis for an improved understanding of slow heavy ions passing through gaseous media. The stripping performance of the current N2-jet was excelled by using H2 at increased gas densities, enabled by the new pulsed gas cell.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF035

Export •

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