Replacement monochromator cryocoolers for NE-CAT

用于 NE-CAT 的替换单色仪制冷机

• 批准号: 10654454
• 负责人: STEVEN E EALICK
• 金额: $ 30.5万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10654454
• 关键词: 15 year old; Aging; Biological; Calendar; Communities; Crystallization; Crystallography; Data; Data Collection; Deposition; Development; Failure; Liquid substance; Maintenance; Manufacturer Name; Minor; Nitrogen; Pharmacologic Substance; Photons; Publications; Sampling; Series; Services; Silicon; Source; Structure; System; Temperature; Visit; beamline; biological systems; design; detector; improved; macromolecule; repaired; three dimensional structure; vibration

Project Summary The Northeast Collaborative Access Team (NE-CAT) operates two undulator beamlines (24-ID- C and 24-ID-E) at the Advanced Photon Source. Both beamlines are equipped with MD2 microdiffractometers, cryocooling systems, sample automounters, and pixel array detectors. Access is provided to a large user community with 546 unique users performing 657 data collection trips in calendar year 2021 (3003 total user visits). The NE-CAT beamlines collect data resulting in approximately 180 publications and over 400 PDB deposits per year. Both NE-CAT beamlines employ FMB Oxford liquid nitrogen cryocoolers to maintain the temperature of their silicon monochromator crystals at an operational temperature of 90 K. The current cryocoolers were installed when the beamlines were originally constructed and are now approximately 15 years old. Over their many years of service, the FMB Oxford cryocoolers have been dependable and only required routine maintenance and minor repairs to their control systems. Anticipating their eventual failure and to reduce beam vibrations, we propose to replace both cryocoolers with FMB Oxford Cryocooler XV systems. The FMB Oxford Cryocooler XV is a proven design that will provide many years of dependable service while also improving beam stability by reducing liquid nitrogen flow-induced vibrations of the silicon monochromator crystals.

项目摘要 东北协作访问团队（NE-CAT）运营两个起伏的光束线（24-ID- 在高级光子源处的C和24-ID-E）。两种光束线都配备了MD2 微型经科，冷冻系统，样品汽车和像素阵列检测器。 提供了546个唯一用户执行657个数据的大型用户社区的访问权限 日历年2021年的收集旅行（总计3003个用户访问）。 NE-CAT梁索收集 数据导致每年约有180个出版物和400多个PDB存款。 两种NE-CAT梁均采用FMB牛津液氮冷冻机来维持 其硅单色晶体的温度在90K的操作温度下。 当梁线最初构造时，安装了当前的冷冻机，现在 大约15岁。在他们的多年服务中，FMB牛津冷冻机器人拥有 是可靠的，只需要进行常规维护和对其控制的次要维修 系统。预见他们最终失败并减少光束振动，我们建议 用FMB Oxford Cryocooler XV系统替换两个冷冻机。 FMB牛津冷冻机 XV是一种经过验证的设计，将提供多年可靠的服务，同时也可以改善 梁稳定性通过降低硅单色仪的液氮流动诱导的振动 晶体。