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THERMAL ANALYSES AND FREQUENCY SHIFT DESIGN STUDIES FOR THE SPALLATION NEUTRON SOURCE DRIFT TUBE LINAC

机译：飞溅中子源漂移直线加速器的热分析和频率转换设计研究

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摘要

Los Alamos National Laboratory is responsible for the design of the room-temperature linac for the Spallation Neutron Source (SNS). This linac consists of a Coupled-Cavity Linac (CCL) and a Drift Tube Linac (DTL). During normal operation, about 80% of the Radio Frequency (RF) power is dissipated in the DTL cavity walls. This waste heat causes the cavities to expand, causing shifts in their RF resonant frequency. The DTL relies on the water cooling system to compensate for the frequency shift caused by RF heating. To guide the design of the cooling system and the frequency control scheme, thermal expansion and frequency shift studies for several DTL cells are performed via numerical simulations. Temperature distributions and thermal deformations resulting from RF heating are evaluated separately for the tanks and 22 drift tubes using finite element models. The frequency shift of these cells are then computed based on the calculated deformations. Size and locations of the cooling channels are designed accordingly to provide adequate cooling and minimize frequency shift. The tank finite element model used to predict the tank temperature profile is benchmarked against experiment
机译：洛斯阿拉莫斯国家实验室负责散裂中子源（SNS）的室温直线加速器的设计。该直线加速器由耦合腔直线加速器（CCL）和漂移管直线加速器（DTL）组成。在正常操作期间，DTL腔壁中会消耗大约80％的射频（RF）功率。废热导致空腔膨胀，从而导致其RF谐振频率发生变化。 DTL依靠水冷系统来补偿由RF加热引起的频移。为了指导冷却系统的设计和频率控制方案，通过数值模拟对几个DTL单元进行了热膨胀和频移研究。使用有限元模型分别对水箱和22个漂移管分别评估由RF加热引起的温度分布和热变形。然后，基于计算出的变形来计算这些单元的频移。相应地设计了冷却通道的大小和位置，以提供足够的冷却并最大程度地减少频率偏移。用于预测储罐温度曲线的储罐有限元模型以实验为基准

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  • 来源
    《》|2001年|p.153-160|共8页
  • 会议地点 New York NY(US);New York NY(US)
  • 作者

    Lucie Parietti;

  • 作者单位

    Spallation Neutron Source Division Mechanical Engineering Group Los Alamos National Laboratory P.O. Box 1663, MS H821 Los Alamos, NM 87545;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电工技术;
  • 关键词

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