ESR MICROSCOPE MAIN MAGNET POWER SUPPLY UPGRADE

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 我们购买了最先进的精密大功率开关电源(15kW Lambda Genesys系列)，以取代目前用作16 GHz ESR脉冲显微镜主磁铁电源的老式瓦里安5kW线性电源。替代开关电源在非常高的功率密度封装中提供低噪声、调节良好的输出，该封装包括许多用于直接计算机和局域网控制的I/O选项。对该电源系列的辐射和传导射频噪声进行了彻底的调查，供应商提供了补充的合格证明，证明其适用于核磁共振和电子自旋共振等敏感应用。该电源将被整合到主机可编程调节系统中，该系统包括当前的霍尔系统(基于湖岸475)和专有的场/频率锁(FFL)R.F.探测器/处理器。2008年秋季，该系统将取代现有的FFL贴片(瓦里安)/磁铁电源。为35 GHz ESRM磁体购买了第二个类似的15kW电源，该磁体也将使用混合霍尔/FFL磁场调节系统。因此，我们的期望是，第一个场调节磁体电源的设计、建造和实现的经验将有益地应用于35 GHz ESR显微镜的第二个系统。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. We have acquired a state-of-the-art precision high-power switching power supply (15KW Lambda Genesys series) to replace the older Varian 5KW linear supply presently employed as the main magnet power source for the 16GHz ESR pulse microscope. The replacement switching power supply provides a low-noise, well-regulated output in a very high power density package that includes a number of I/O options for direct computer and LAN control. A thorough investigation of radiated and conducted radiofrequency noise for this power supply series has resulted in the vendor's supplying supplemental qualifying proof of its suitability for sensitive applications such as NMR and ESR. This supply will be incorporated into a host computer programmable regulation system consisting of the current Hall system (based on Lakeshore 475) and a proprietary field/frequency lock (FFL) r.f. detector/processor. In fall of 2008 this system will replace the existing FFL patch (Varian)/magnet power source. A second, similar 15KW power supply has been acquired for the 35GHz ESRM magnet, which will also utilize a hybrid Hall/FFL field regulation system. Consequently, our expectation is that the experience in design, construction and implementation of the first field-regulated magnet power source will be gainfully applied to the second system intended for the 35GHz ESR microscope.