| Paper |
Title |
Other Keywords |
Page |
| TUAZ02 |
High-Intensity Beam Collimation and Targetry
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target, beam-losses, proton, radiation |
74 |
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- N. V. Mokhov
Fermilab, Batavia, Illinois
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Principles, design criteria and realization are described for reliable collimation systems for the high-power accelerators (Fermilab Booster and Main Injector, SNS, J-PARC), hadron colliders (Tevatron and LHC) and e+e- linear colliders (ILC). Factors affecting the expected and achieved collimation performances are analyzed. Functionality of collimators as the key elements of the machine protection system are considered using as an example a recent beam accident case in the Tevatron. A substantial progress on the crystal collimation front is described. The key issues are considered in design of high-power target systems and achieving their best performance. Simulation code requirements and recent benchmarking results are presented. A status of conventional neutrino targets and neutrino factory target concepts is described along with performed and planned beam tests. Overview of the target and collimator material beam tests concludes this report.
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| THAZ03 |
Safe LHC Beam Commissioning
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injection, dumping, extraction, beam-losses |
306 |
| |
- J. A. Uythoven, R. Schmidt
CERN, Geneva
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Due to the large amount of energy stored in magnets and beams, safe operation of the LHC is essential. The commissioning of the LHC machine protection system will be an integral part of the general LHC commissioning program. A brief overview of the LHC Machine Protection System will be given, identifying the main components: the Beam Interlock System, the Beam Dumping System, the Collimation System, the Beam Loss Monitoring system and the Quench Protection System. An outline is given of the commissioning strategy of these systems during the different commissioning phases of the LHC: without beam, injection and the different phases with stored beam depending on beam intensity and beam energy.
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| THAZ04 |
Commissioning and Operational Scenarios of the LHC Beam Loss Monitor System
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beam-losses, simulation, superconducting-magnet, ion |
314 |
| |
- E. B. Holzer
CERN, Geneva
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One of the most critical elements for the protection of CERN’s Large Hadron Collider (LHC) is its beam loss monitoring (BLM) system. It aims to prevent the super conducting magnets from quenching and to protect the machine components from damages, as a result of critical beam losses. The contribution will discuss the commissioning procedures of the BLM system and the envisaged operational scenarios. About 4000 monitors will be installed around the ring. The specification for the BLM system includes a factor of 2 absolute precisions on the prediction of the quench levels, a wide range of integration times (100 us to 100 s) and a fast (one turn) trigger generation. When the loss rate exceeds a pre-defined threshold value, a beam abort is requested. Magnet quench and damage levels vary as a function of beam energy and loss duration. Consequently, the beam abort threshold values vary accordingly. By measuring the loss pattern, the BLM system helps to identify the loss mechanism. Furthermore, it will be an important tool for commissioning, machine setup and studies. Special monitors will be used for the setup and control of the collimators.
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| FRAP03 |
Summary of Working Group C+G (Part I)
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beam-losses, extraction, target, injection |
365 |
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- N. V. Mokhov
Fermilab, Batavia, Illinois
- K. Hasegawa
JAEA, Ibaraki-ken
- S. Henderson
ORNL, Oak Ridge, Tennessee
- R. Schmidt
CERN, Geneva
- M. Tomizawa
KEK, Ibaraki
- K. Wittenburg
DESY, Hamburg
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