Mechanical robustness of HL-LHC collimator designs
Mechanical robustness of HL-LHC collimator designs
复制标题
HL-LHC 准直器设计的机械稳健性
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
E. Skordis
中科院分区：
文献类型：
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作者：
F. Carra;A. Bertarelli;G. Gobbi;J. Guardia;M. Guinchard;F. Harden;M. Pasquali;S. Redaelli;E. Skordis
为了满足HL-LHC高亮度光束的要求，研制了两种新的吸收材料：碳化钨石墨（MoGr）和铜金刚石（CuCD）。2015年，在CERN HiRadMat设施对这些材料进行了强束冲击试验，当时对全钳口原型进行了辐照。2017年，在HiRadMat中对另一系列材料样品进行了额外的测试，包括改进等级的MoGr和CuCD以及不同的涂层溶液。本文总结了这两个实验的主要结果，主要集中在新型复合材料块，金属外壳，以及冷却回路的行为。实验活动确认了HL-LHC准直器材料和设计解决方案的最终选择，并构成了对数值模型进行基准测试的独特机会。特别是，测试验证了选择MoGr用于初级和次级准直器，以及CuCD作为鲁棒三级准直器的有效解决方案。
Two new absorbing materials were developed as collimator inserts to fulfil the requirements of HL-LHC higher brightness beams: molybdenum-carbide graphite (MoGr) and copper-diamond (CuCD). These materials were tested under intense beam impacts at CERN HiRadMat facility in 2015, when full jaw prototypes were irradiated. Additional tests in HiRadMat were performed in 2017 on another series of material samples, including also improved grades of MoGr and CuCD, and different coating solutions. This paper summarizes the main results of the two experiments, with a main focus on the behaviour of the novel composite blocks, the metallic housing, as well as the cooling circuit. The experimental campaign confirmed the final choice for the materials and the design solutions for HL-LHC collimators, and constituted a unique chance of benchmarking numerical models. In particular, the tests validated the selection of MoGr for primary and secondary collimators, and CuCD as a valid solution for robust tertiary collimators.