Performance of an Ultra-High Vacuum System Employing Sorption Pump and Getter-Ion Pump

Emergency power source for an ion vacuum pump.

This note describes a simple high-voltage dc generator which serves as an emergency power source for an ion vacuum pump during power interruptions, or failure of the main supply.

Agilent 4UHV Ion Pump Controller Design to Optimize Pump Performance

Ion pump controllers are often considered just accessories needed to power ion pumps. Only basic parameters such as the maximum power and the communication interface are considered relevant, with the power usually being overspecified, resulting in needlessly expensive controllers. However, a properly designed controller can substantially improve the ion pump performance. A controller with varia...

Vacuum Gauge to Vacuum Pump Valve

An Experimental Investigation into the Effects of High Viscosity and Foamy Oil Rheology on a Centrifugal Pump Performance

This paper presents the effect of high viscosity oil and two-phase foamy-oil flow on the performance of a single stage centrifugal pump. As a part of this, the applicability of a pipe viscometer to determine the foamy oil viscosity is investigated. Unlike previous studies, a sealed fluid tank is used in a closed flow loop to allow conditioning the two-phase mixture to create foamy-oil. Furtherm...

Construction of an artificial heart pump performance test system.

A hydraulic loop, which simulates pressure/flow response of the human circulatory system, is needed to bench test the various versions of rotary left ventricular assist devices (LVADs). This article describes the design of such a loop and the simulated response of different physiological states, such as a healthy person in sleep, rest, and mild physical activity, and in different pathological s...