Present superconducting accelerators require a central refrigeration system and piping to distribute liquid helium and nitrogen. Stand-alone cryocooler-based systems are of significant interest both to scientific and industrial customers, as they allow applications at facilities where no cryogenic equipment and expertise exists, where it is undesirable to develop additional cryogenic systems, or where a mobile system that can be transported between beamlines or facilities is required. The technical challenge of this approach is to minimize the heat losses to the liquid helium so that commercially available, self-contained cryocoolers are able to handle the thermal load. This article presents an improved design for a stand-alone quarter-wave resonator (QWR) cryomodule based on commercially available cryocoolers. This cryomodule has a particular application in the Argonne Tandem Linac Accelerator System intensity upgrade project, where it will house a 72.75 MHz QWR for beam energy adjustments to experimental areas, where no helium cryogenic systems exist. The described cryomodule may also be the critical part of a turnkey system with application to material processing, semiconductor manufacturing, food irradiation, and homeland security. The development of low-heat loss peripheral components reduces the cost and widens applicability of the system. We will discuss the cryomodule and RF coupler designs, including numerical thermal and structural analyses.

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基于超导四分之一波谐振器的独立低温模块设计

目前的超导加速器需要一个中央制冷系统和管道来分配液氦和液氮。基于独立低温冷却器的系统对科学和工业客户都具有重要意义，因为它们允许在没有低温设备和专业知识的设施中应用，在不希望开发额外的低温系统的地方，或者在可以移动系统的地方需要在光束线或设施之间传输。这种方法的技术挑战是最大限度地减少液氦的热损失，以便市售的自给式低温冷却器能够处理热负荷。本文介绍了基于商用低温冷却器的独立四分之一波谐振器 (QWR) 低温模块的改进设计。该低温模块在 Argonne Tandem Linac Accelerator System 强度升级项目中具有特殊应用，其中将容纳 72.75 MHz QWR，用于对不存在氦低温系统的实验区域进行束能量调整。所描述的低温模块也可能是应用于材料加工、半导体制造、食品辐照和国土安全的交钥匙系统的关键部分。低热损外围元件的开发降低了成本，扩大了系统的适用性。我们将讨论低温模块和 RF 耦合器设计，包括数值热分析和结构分析。不存在氦低温系统的地方。所描述的低温模块也可能是应用于材料加工、半导体制造、食品辐照和国土安全的交钥匙系统的关键部分。低热损外围元件的开发降低了成本，扩大了系统的适用性。我们将讨论低温模块和 RF 耦合器设计，包括数值热分析和结构分析。不存在氦低温系统的地方。所描述的低温模块也可能是应用于材料加工、半导体制造、食品辐照和国土安全的交钥匙系统的关键部分。低热损外围元件的开发降低了成本，扩大了系统的适用性。我们将讨论低温模块和 RF 耦合器设计，包括数值热分析和结构分析。