نتایج جستجو برای: vacuum pump
تعداد نتایج: 109041 فیلتر نتایج به سال:
Vacuum space charge induced kinetic energy shifts of O 1s and Ru 3d core levels in femtosecond soft X-ray photoemission spectra (PES) have been studied at a free electron laser (FEL) for an oxygen layer on Ru(0001). We fully reproduced the measurements by simulating the in-vacuum expansion of the photoelectrons and demonstrate the space charge contribution of the high-order harmonics in the FEL...
Chamber models are wildly used for a screw vacuum pump capacity calculation. Those allow to take into account lot of factors which have great influence on the capacity, and working power. The first stage chamber models’ development is mathematic description geometrical parameters. This paper presents time-depending parameters, such as volume, areas suction discharge ports, gaps gas leakage goes...
There has been much advancement in perfusion technology over its 50 years of progression. One of these techniques is vacuum-assisted venous drainage (VAVD). Many perfusionists augment venous drainage using VAVD, typically from a wall vacuum source. This study explores alternates to providing VAVD if the wall vacuum fails. In two porcine laboratories, approximately 36 in. of 3/16-in. tubing was ...
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