CONTROLLED-TEMPERATURE INSERT FOR 95 GHZ CW/PULSE SPECTROMETRY

用于 95 GHZ CW/脉冲光谱测定的控温插件

• 批准号: 8363994
• 负责人: CURT R DUNNAM
• 金额: $ 0.37万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8363994
• 关键词: Frequencies; Funding; Gases; Grant; Modeling; Monitor; National Center for Research Resources; Physiologic pulse; Positioning Attribute; Principal Investigator; Proteins; Regulation; Research; Research Infrastructure; Resources; Sampling; Schedule; Source; Spectrometry; Structure; System; Technology; Temperature; Time; United States National Institutes of Health; Vacuum; cold temperature; cost; cryogenics; cryostat; design; research study; seal; sensor

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. ACERT is scheduled for installation of a Cryogenic, Ltd. 9T cryogen-free magnet and low-temperature insert in late August, 2007. This schedule represents a 3-month delay from the original installation date. For impending step-frequency 95 GHz DEER experiments on protein systems in our existing 6T Oxford magnet, we have therefore proceeded with specification and design of a significant interim upgrade to our earlier JOMO-I temperature control system. The Controlled Temperature Insert (CTI) upgrade that we are presently assembling consists of an added closed-loop gas pre-heater section, construction of a low time-constant temperature control heater within the existing "ambienstat" insert structure and temperature monitoring of one or both of the vacuum-retaining warm bore "O"-ring seals. The existing Lakeshore model 331 temperature controller, with input from an appropriate sensor at the sample, will be retained as the primary temperature regulating system. Temperature control down to 100¿K at 0.1¿K stability is expected. All components for the interim CTI upgrade have been acquired, and the insert structure has been modified to accept a heater/armature assembly in a position of close proximity (7 cm) to the sample. A rack chassis with front panel Omega controller/monitors and heater power driver circuitry for preheater regulation and O-ring seals temperature monitoring (and, optionally, control) is currently under construction. We intend to complete construction and debug of the rackmount CTI preheater control system within a few weeks, at which time the controller will be installed in the 95 GHz magnet in concert with the revised ambienstat and cryostat O-ring seal monitors.

该子项目是利用资源的众多研究子项目之一 由 NIH/NCRR 资助的中心拨款提供 该子项目的主要支持。 并且子项目的主要研究者可能是由其他来源提供的， 包括其他 NIH 来源的子项目可能列出的总成本。 代表子项目使用的中心基础设施的估计数量， NCRR 赠款不直接向子项目或子项目工作人员提供资金。 ACERT 计划于 2007 年 8 月下旬安装 Cryogenic, Ltd. 9T 无冷冻剂磁体和低温插入件。该计划比原定安装日期推迟了 3 个月，因为即将进行的步进频率 95 GHz DEER 实验。基于我们现有 6T 牛津磁体中的蛋白质系统，我们对我们早期的 JOMO-I 温度控制系统进行了重大临时升级的规范和设计。我们目前正在组装的 (CTI) 升级包括增加一个闭环气体预热器部分、在现有的“ambienstat”插入结构内构造一个低时间常数温度控制加热器以及对一个或两个真空进行温度监控- 保留热孔“O”形圈密封件。现有的 Lakeshore 331 型温度控制器，带有来自样品处适当传感器的输入，将保留作为主要温度调节系统，温度控制低至 100°。 K 为 0.1¿ K 值预计稳定。 用于临时 CTI 升级的所有组件均已获得，并且插入结构已被修改，以在靠近样品的位置（7 厘米）容纳加热器/电枢组件 带有前面板 Omega 控制器/监视器和的机架底盘。用于预热器调节和 O 形圈密封件温度监控（以及可选控制）的加热器电源驱动电路目前正在建设中。我们打算在几周内完成机架式 CTI 预热器控制系统的建设和调试，届时控制器。将要与改进的环境恒温器和低温恒温器 O 形圈密封监视器配合安装在 95 GHz 磁体中。