IPAC2018 - List of Authors (Morri, C.)

Paper	Title	Page
WEPML032	The FAIR-SIS100 Bunch Compressor RF Station	2759
	H.G. König, R. Balß, P. Hülsmann, H. Klingbeil, P.J. Spiller GSI, Darmstadt, Germany R. Gesche, J.H. Scherer Aurion Anlagentechnik GmbH, Seligenstadt, Germany A. Morato, C. Morri, G.T. Taddia OCEM, Valsamoggia, Italy
	In the frame of the Facility for Antiproton and Ion Research (FAIR) 9 bunch compressor RF stations were ordered for the first stage of realization of the SIS100 synchrotron. For RF gymnastics referred to as bunch rotation, one RF station has to provide a sudden rise in gap voltage of up to 40 kVp within less than 30 μs. The system is designed for a maximum RF burst of 3 ms per second. The RF frequency will be pre-selectable between 310 kHz and 560 kHz at a harmonic number of h=2 with respect to the beam. Compressed bunches with a peak current > 150 A and a width < 50 ns are the goal. For this purpose, a 1.218 m long cavity was designed using iron-based magnetic alloy cores. Variable vacuum capacitors are attached for tuning. The cavity is driven by a cross-coupled push-pull tetrode amplifier. This scheme minimizes the influence of the tetrode's DC current at the working point to the cores. The energy for the pulsed system is stored in a relatively small capacitor bank which will be charged semi-continuously and a voltage-stabilizing device is added. Cavity and power amplifier were realized by AURION Anlagentechnik GmbH ' the power supply unit is designed and built by OCEM Power Electronics.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPML032
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WEPML034	Design and Commissioning of the RF System of the Collector Ring at FAIR	2765
	U. Laier, R. Balß, A. Dolinskyy, P. Hülsmann, H. Klingbeil, T. Winnefeld GSI, Darmstadt, Germany G. Blokesch, F. Wieschenberg Ampegon PPT GmbH, Dortmund, Germany K. Dunkel, M. Eisengruber, J.H. Hottenbacher RI Research Instruments GmbH, Bergisch Gladbach, Germany C. Morri, M.P. Pretelli, G.T. Taddia OCEM, Valsamoggia, Italy
	The Collector Ring (CR), a storage ring intended to perform efficient cooling of secondary beams, is under construction at GSI in the scope of the FAIR project. The RF system of the CR has to provide a frequency range from 1.1 to 1.5 MHz and pulsed gap voltages of up to 200 kVp (0.2 to 1 Hz, max. 10^-3 duty cycle) and up to 10 kVp in CW operation. Five identical RF stations will be built. Each RF station consists of an inductively loaded cavity, a tetrode based power amplifier, a semiconductor driver amplifier, a switch mode power supply and two digital feedback loops. The main components of the RF station are designed, built and commissioned in close collaboration between GSI and three companies: RI Research Instruments GmbH, Ampegon PPT GmbH and OCEM Energy Technology SRL. In 2016, the first of five RF stations has been integrated at GSI. In 2017 the system was successfully commissioned to demonstrate that all envisaged parameters have been achieved. This contribution will present the requirements imposed the system, the principal design of the overall system as well as of its key components, and the results of the commissioning of the first RF station.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPML034
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Paper

Title

Page

The FAIR-SIS100 Bunch Compressor RF Station

2759

H.G. König, R. Balß, P. Hülsmann, H. Klingbeil, P.J. Spiller
GSI, Darmstadt, Germany
R. Gesche, J.H. Scherer
Aurion Anlagentechnik GmbH, Seligenstadt, Germany
A. Morato, C. Morri, G.T. Taddia
OCEM, Valsamoggia, Italy

In the frame of the Facility for Antiproton and Ion Research (FAIR) 9 bunch compressor RF stations were ordered for the first stage of realization of the SIS100 synchrotron. For RF gymnastics referred to as bunch rotation, one RF station has to provide a sudden rise in gap voltage of up to 40 kVp within less than 30 μs. The system is designed for a maximum RF burst of 3 ms per second. The RF frequency will be pre-selectable between 310 kHz and 560 kHz at a harmonic number of h=2 with respect to the beam. Compressed bunches with a peak current > 150 A and a width < 50 ns are the goal. For this purpose, a 1.218 m long cavity was designed using iron-based magnetic alloy cores. Variable vacuum capacitors are attached for tuning. The cavity is driven by a cross-coupled push-pull tetrode amplifier. This scheme minimizes the influence of the tetrode's DC current at the working point to the cores. The energy for the pulsed system is stored in a relatively small capacitor bank which will be charged semi-continuously and a voltage-stabilizing device is added. Cavity and power amplifier were realized by AURION Anlagentechnik GmbH ' the power supply unit is designed and built by OCEM Power Electronics.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPML032

Export •

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

WEPML034

Design and Commissioning of the RF System of the Collector Ring at FAIR

2765

U. Laier, R. Balß, A. Dolinskyy, P. Hülsmann, H. Klingbeil, T. Winnefeld
GSI, Darmstadt, Germany
G. Blokesch, F. Wieschenberg
Ampegon PPT GmbH, Dortmund, Germany
K. Dunkel, M. Eisengruber, J.H. Hottenbacher
RI Research Instruments GmbH, Bergisch Gladbach, Germany
C. Morri, M.P. Pretelli, G.T. Taddia
OCEM, Valsamoggia, Italy

The Collector Ring (CR), a storage ring intended to perform efficient cooling of secondary beams, is under construction at GSI in the scope of the FAIR project. The RF system of the CR has to provide a frequency range from 1.1 to 1.5 MHz and pulsed gap voltages of up to 200 kVp (0.2 to 1 Hz, max. 10^-3 duty cycle) and up to 10 kVp in CW operation. Five identical RF stations will be built. Each RF station consists of an inductively loaded cavity, a tetrode based power amplifier, a semiconductor driver amplifier, a switch mode power supply and two digital feedback loops. The main components of the RF station are designed, built and commissioned in close collaboration between GSI and three companies: RI Research Instruments GmbH, Ampegon PPT GmbH and OCEM Energy Technology SRL. In 2016, the first of five RF stations has been integrated at GSI. In 2017 the system was successfully commissioned to demonstrate that all envisaged parameters have been achieved. This contribution will present the requirements imposed the system, the principal design of the overall system as well as of its key components, and the results of the commissioning of the first RF station.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPML034

Export •

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