IPAC2015 - List of Authors (Sanchez-Quesada, J.)

Paper	Title	Page
MOPTY056	Elena Orbit and Schottky Measurement Systems	1061
	L. Søby, M.E. Angoletta, R. Marco-Hernandez, J.C. Molendijk, F. Pedersen, J. Sanchez-Quesada CERN, Geneva, Switzerland M. Bau University of Brescia, Brescia, Italy M. Ferrari, V. Ferrari Università di Brescia, Brescia, Italy
	A new Extra Low ENergy Antiproton ring (ELENA) is under construction at CERN to further decelerate the antiprotons from the existing Antiproton Decelerator (AD) to an energy of just 100 keV. This contribution will describe the beam position system foreseen for ELENA and how it can be adapted for Schottky measurements. The orbit system being developed is based on electrostatic shoebox BPMs fitted with Digital Down Converters (DDC). The main requirement is to measure complete orbits every 20 ms with a resolution of 0.1mm for intensities in the range of 1-3x10⁷ charges. The pick-up signals will, after amplification with a low noise charge amplifier, be down-mixed to baseband for position computation. In order to provide the longitudinal Schottky diagnostics of un-bunched beams, the 20 BPM sum signals will, after time off flight corrections, be added digitally to give an expected S/N increase of 13 dB compared to using a single electrostatic pick-up.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY056
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WEPHA015	Beam Tests Using a Wide Band RF System Prototype in the CERN PS Booster	3134
	M.M. Paoluzzi, M.E. Angoletta, A. Findlay, M. Haase, M. Jaussi, A.J. Jones, J.C. Molendijk, J. Sanchez-Quesada CERN, Geneva, Switzerland
	In the framework of the LHC Injectors Upgrade project (LIU) and in view of a complete replacement of the existing CERN PS Booster (PSB) RF systems, a small scale, wide band prototype cavity was installed in 2012 in the machine. Following the encouraging tests done using this limited set up, an almost full scale, RF system prototype has been built and installed in the PSB during the Long Shutdown 1 (LS1). This modular, Finemet® loaded system covers the band 0.5 / 4 MHz corresponding to the h=1 and h=2 frequency ranges. It uses solid-state power stages and includes fast RF feedback for beam loading compensation. New dedicated digital low level electronics have been implemented for all loops required for beam acceleration and interfaces with the general PSB control system. It allows using the new equipment at the fundamental and/or second harmonic of the beam revolution frequency as well as operating it in parallel with the existing RF systems. This paper describes the low level and power sections of the project and reports about the achieved results and experience built up so far.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA015
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Elena Orbit and Schottky Measurement Systems

1061

L. Søby, M.E. Angoletta, R. Marco-Hernandez, J.C. Molendijk, F. Pedersen, J. Sanchez-Quesada
CERN, Geneva, Switzerland
M. Bau
University of Brescia, Brescia, Italy
M. Ferrari, V. Ferrari
Università di Brescia, Brescia, Italy

A new Extra Low ENergy Antiproton ring (ELENA) is under construction at CERN to further decelerate the antiprotons from the existing Antiproton Decelerator (AD) to an energy of just 100 keV. This contribution will describe the beam position system foreseen for ELENA and how it can be adapted for Schottky measurements. The orbit system being developed is based on electrostatic shoebox BPMs fitted with Digital Down Converters (DDC). The main requirement is to measure complete orbits every 20 ms with a resolution of 0.1mm for intensities in the range of 1-3x10⁷ charges. The pick-up signals will, after amplification with a low noise charge amplifier, be down-mixed to baseband for position computation. In order to provide the longitudinal Schottky diagnostics of un-bunched beams, the 20 BPM sum signals will, after time off flight corrections, be added digitally to give an expected S/N increase of 13 dB compared to using a single electrostatic pick-up.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY056

Export •

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

WEPHA015

Beam Tests Using a Wide Band RF System Prototype in the CERN PS Booster

3134

M.M. Paoluzzi, M.E. Angoletta, A. Findlay, M. Haase, M. Jaussi, A.J. Jones, J.C. Molendijk, J. Sanchez-Quesada
CERN, Geneva, Switzerland

In the framework of the LHC Injectors Upgrade project (LIU) and in view of a complete replacement of the existing CERN PS Booster (PSB) RF systems, a small scale, wide band prototype cavity was installed in 2012 in the machine. Following the encouraging tests done using this limited set up, an almost full scale, RF system prototype has been built and installed in the PSB during the Long Shutdown 1 (LS1). This modular, Finemet® loaded system covers the band 0.5 / 4 MHz corresponding to the h=1 and h=2 frequency ranges. It uses solid-state power stages and includes fast RF feedback for beam loading compensation. New dedicated digital low level electronics have been implemented for all loops required for beam acceleration and interfaces with the general PSB control system. It allows using the new equipment at the fundamental and/or second harmonic of the beam revolution frequency as well as operating it in parallel with the existing RF systems. This paper describes the low level and power sections of the project and reports about the achieved results and experience built up so far.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA015

Export •

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