Paper |
Title |
Page |
MOP184 |
Beam Instrumentation for the European Spallation Source |
432 |
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- A. Jansson, H. Danared, M. Eshraqi, L. Tchelidze
ESS, Lund, Sweden
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The European Spallation Source, which will be built in the south of Sweden, is a neutron source based on a 5MW, 2.5GeV proton linac. The project is currently in the design update phase, and will deliver a Technical Design Report at the end of 2012. Construction is expected to begin in 2013. This paper discusses the initial beam diagnostics specifications, along with some possible instrument design options.
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MOP218 |
High Level Software for 4.8 Ghz LHC Schottky System |
507 |
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- J. Cai, E.S.M. McCrory, R.J. Pasquinelli
Fermilab, Batavia, USA
- M. Favier, O.R. Jones
CERN, Geneva, Switzerland
- A. Jansson
ESS, Lund, Sweden
- T.E. Lahey
SLAC, Menlo Park, California, USA
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A high level software package has been developed for a 4.8GHz Schottky system installed in the LHC at CERN. It has two main components. The first is a monitor application continuously running on a dedicated server as a daemon process to acquire the FFT traces, perform data analysis, publish results and do archiving. The second is a graphical user interface to display the FFT traces and various measurement results. It also allows the end user to change the settings for the front-end electronics such as the local oscillators, bunch selector, amplifier gains etc. Data analysis with curve fitting poses a big challenge due to the strong coherent signals that are often observed superimposed onto the Schottky sidebands. A method has been successfully created to remove the coherent spikes to enable curve fitting on the underlying signals, with the ultimate aim of providing reliable tune, momentum spread, chromaticity and emittance measurements for LHC beams with no external excitation.
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WEOBN6 |
LARP LHC 4.8 GHz Schottky System Initial Commissioning with Beam |
1413 |
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- R.J. Pasquinelli
Fermilab, Batavia, USA
- F. Caspers, O.R. Jones
CERN, Geneva, Switzerland
- A. Jansson
ESS, Lund, Sweden
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The LHC Schottky system consists for four independent 4.8 GHz triple down conversion receivers with associated data acquisition systems. Each system is capable of measuring tune, chromaticity, momentum spread in either horizontal or vertical planes; two systems per beam. The hardware commissioning has taken place during the spring and summer of 2010. With nominal bunch beam currents of 1011 protons, the first incoherent Schottky signals were detected and analyzed. This paper will report on these initial commissioning results. A companion paper will report on the data analysis curve fitting and remote control user interface of the system.
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Slides WEOBN6 [27.117 MB]
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FROAN1 |
The European Spallation Source |
2549 |
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- S. Peggs, H. Danared, M. Eshraqi, H. Hahn, A. Jansson, M. Lindroos, A. Ponton, K. Rathsman, G. Trahern
ESS, Lund, Sweden
- S. Bousson
IPN, Orsay, France
- R. Calaga
BNL, Upton, Long Island, New York, USA
- G. Devanz, R.D. Duperrier
CEA/DSM/IRFU, France
- J. Eguia
Fundación TEKNIKER, Eibar (Gipuzkoa), Spain
- S. Gammino
INFN/LNS, Catania, Italy
- S.P. Møller
ISA, Aarhus, Denmark
- C. Oyon
SPRI, Bilbao, Spain
- R.J.M.Y. Ruber
Uppsala University, Uppsala, Sweden
- T. Satogata
JLAB, Newport News, Virginia, USA
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The European Spallation Source (ESS) is a 5 MW, 2.5 GeV long pulse proton linac, to be built and commissioned in Lund, Sweden. The Accelerator Design Update (ADU) project phase is under way, to be completed at the end of 2012 by the delivery of a Technical Design Report. Improvements to the 2003 ESS design will be summarised, and the latest design activities will be presented.
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Slides FROAN1 [1.650 MB]
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