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Title |
Other Keywords |
Page |
| MOAP01 |
Approach to a very high intensity beam at J-PARC
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linac, proton, injection, rfq |
1 |
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- Y. Yamazaki
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
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| WEBZ03 |
A New High Rate Charged Particles Detector
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controls, kaon, scattering, proton |
256 |
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- Ph. Legou
CEA, Gif-sur-Yvette
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Sextant is a new Beam Spectrometer. This detector is based on a Time Projection Chamber(TPC)principle, using a gaseous detector called Micromegas. Thus, we have a better efficiency, with the minimum amount of material in the way of the beam. Moreover, using the TPC technique, the Mesh of the detector is positioned outside the high intensity region covered by the beam. Peformances of this detecor are very good in a high intensity hadron beams (spatial resolution : 70μm and time resolution 600ps). The integration of the front end on the PCB led to a very low noise for the entire detector. Main characteristics of the preamplifier are 1ns of rise time and a very low noise, lower than 600 μV rms. Sextant is an evolution of KABES, a beam spectrometer on NA 48II at CERN. This concept have shown very good performances and robustness.
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| THAY07 |
SC Spoke Cavity
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linac, proton, ion, beam-loading |
337 |
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- M. P. Kelly
ANL, Argonne, Illinois
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Superconducting (SC) TEM-class spoke cavities have been an area of active research during the past decade with application to cw and pulsed ion linacs required for proposed facilities world-wide. Single- and multi-spoke geometries have been developed for use with ions over the full mass range and with velocities 0.2 < v/c < 0.8. Spoke cavities for this range, generally designed for 4 K operation, have several advantages over 2 K elliptical-cell cavities stemming mostly from the lower operating frequency. However, recent spoke-cavity results in 2 K operation, based on new and evolving cavity processing techniques such as clean assembly and hydrogen degassing, show very low rf losses even for high surface fields (EPEAK ~30 MV/m) required in operations. 2K results indicate even higher voltage gains per cavity with reduced heat loads are possible. Other implications of 2 Kelvin spoke cavity operation for ion linacs are discussed.
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