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. Author manuscript; available in PMC: 2019 Mar 11.
Published in final edited form as: J Magn Reson. 2017 Sep 1;283:71–78. doi: 10.1016/j.jmr.2017.08.014

Figure 1. Cryogenic system setup for low temperature MAS NMR.

Figure 1

a) CAD image exhibits the incorporation of the new heat exchanger in a 7 T DNP MAS NMR system (see Fig. S1). b) Flowchart shows the path of nitrogen gas as it cools to < 85 K for MAS and sample cooling. c) Flowchart shoes the generation of pure dry nitrogen from atmospheric air (see also Fig. 2). The stages of the two-stage set of filters between the dryers, models 2312N-1B1-DX and 2312N-1B1-BX, are labeled DX and BX respectively. Nitrogen surge tanks and air surge tanks are labeled NST and AST.