Modernization of an existing X-band EPR spectrometer

目前的仪器由一台带有低温恒温器和高温装置的X波段EPR光谱仪组成，已经在布伦斯韦格理工大学运行了25年以上。模拟Transputer接口被制造商列为“停用”已经有一段时间了，这意味着在出现故障的情况下，对仪器进行简单的1对1更换或维修是不可能的，这对我们的研究很重要。布伦施韦格理工学院没有其他EPR光谱仪。因此，为了避免对我们的研究重要的仪器发生更少或更长时间的故障，通知的项目“现有X波段EPR光谱仪的现代化”将(A)用数字升级来取代目前仍然模拟的Transputer接口，包括微波桥。此外，(B)现有的(T102模)谐振器将被一个双模(T102和T012模)谐振器补充，用于研究过渡金属和稀土化合物中的禁忌跃迁。这里一个积极的方面是，设想的双模谐振器具有大约1倍的更高的灵敏度。1.5与现有的谐振器相比。同样重要的是更换(C)低温恒温器和(D)热交换器(用于现有的10‘’磁铁和12千瓦电源)，因为这些部件在长期运行后不再在其技术规格范围内可靠地工作。为了限制成本，现有的10‘’磁铁，包括12千瓦的电源，可以而且应该整合到新的设置中，并继续使用。在本申请中将不再对不再起作用的现有高温设置的部件进行数字化升级(A)，并将在以后的日期实施。

The currently existing instrument, consisting of an X-band EPR spectrometer with cryostat unit and high-temperature setup, has been operated at the Technische Universität Braunschweig for more than 25 years. The analog transputer interfaces have been listed as "out-of-service" by the manufacturer for some time, which means that in case of failure a simple 1-to-1 replacement or repair of the instrument, which is important for our research, is no longer possible. No other EPR spectrometer is operated at the Technische Universität Braunschweig. Therefore, in order to avoid a replacement-less or longer-term failure of the instrument important for our research, the notified project "Modernization of an existing X-band EPR spectrometer" shall (A) replace the currently still analog transputer interfaces including the microwave bridge by a digital upgrade. In addition, (B) the existing (T102 mode) resonator will be supplemented by a dual-mode (T102 and T012 mode) resonator for the investigation of forbidden transitions in transition metal and lanthanide compounds. A positive aspect here is that the envisaged dual-mode resonator has a higher sensitivity by a factor of approx. 1.5 compared to the existing resonator. Also of great importance is the replacement of (C) the cryostat unit and (D) the heat exchanger (for the existing 10'' magnet together with the 12 kW power supply), since these components no longer work reliably within their technical specifications after long operation. In order to limit costs, the existing 10'' magnet including 12 kW power supply can and should be integrated into the new setup and continued to be used. Modernization of the components of the existing high-temperature setup that are no longer functional with the digital upgrade (A) is not to be pursued in this application and will be implemented at a later date.