| Paper |
Title |
Page |
| MOPL015 |
Effect of Beam Losses on Wire Scanner Scintillator Readout, Hypothesis and Preliminary Results |
216 |
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- B. Cheymol
ESS, Lund, Sweden
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In hadron accelerators, the characterization of the beam transverse halo can lead to a better understanding of the beam dynamics and ultimately to a reduction of the beam losses. Unfortunately the effect of losses on beam instrumentation implies a reduction of the instrument sensitivity due to the background noise. In this paper, we will discuss the effect of losses on the wire scanner scintillator foreseen for the ESS linac, in particular the different hypothesis for the input will be described and preliminary results will be presented.
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| MOPL016 |
Effects of Energy Deposition Models and Conductive Cooling on Wire Scanner Thermal Load, Analytical and Finite Element Analysis Approach |
221 |
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- B. Cheymol
ESS, Lund, Sweden
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One of the main limitations of the wire scanner in high intensity linac is the inability of the wire to survive at high duty cycle. For the commissioning of such machines, duty cycle must be reduced to preserve interceptive devices. A good thermal model of the wire is needed to insure a safe operation of the wire scanner and set the limits of acceptable beam duty cycle. In this paper, we will discuss the influence of the energy deposition model and the efficiency of conductive cooling on the wire temperature, based on the ESS beam parameters.
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| MOPL017 |
High Power and High Duty Cycle Slit and Grid System for Hadron Accelerator Commissioning |
226 |
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- B. Cheymol, A. Ponton
ESS, Lund, Sweden
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Transverse emittance is one of the key measurements to be performed during the commissioning of the low energy sections of an hadron linac. The good knowledge of the beam transverse phase space allows a safe and efficient operation of the machines by using the results of the measurement for beam dynamic simulations. In this paper we will discuss the accuracy and the limits of the transverse emittance measurement performed with the slit-grid method based on the ESS beam parameters at the RFQ (beam energy equal to 3.62 MeV) and DTL tank 1 (beam energy equal to 21 MeV) output.
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| MOPL018 |
Scintillator Detectors for the ESS High Energy Wire Scanner |
232 |
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- B. Cheymol
ESS, Lund, Sweden
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In the ESS linac, during commissioning and restart phase, wire scanner will be used intensively to characterize the transverse beam profiles. At low energy, the mode of detection is based on Secondary Emission (SE), while at energies above 200 MeV, the primary mode of detection will be the measurement of the hadronic shower created in the thin wire. In this paper we will present the design and the output signal estimation of the shower detector, based on inorganic crystal and silicon photodetector.
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