One of the most appropriate methods for elimination of trace impurities in helium is cryogenic adsorption process. So, in this study design and construction of cryogenic adsorption helium purification system (3 Nm3.hr-1, 80 bar) carried out using activated carbon as adsorbent at 77K. To evaluation of adsorption dynamics and effect of pressure on elimination of trace impurities, helium purificat...

in this work, a simple and effective way to modify the support surface is developed and a nanostructure ceramic support to facilitate deposition of a defect-free overlying micro and meso (nano) porous membrane is obtained. to achieve high performance nanocomposite membranes, average pore size of outer surface of support was reduced by dip-coating in submicron and nano α-alumina slurries. in thi...

Abstract In this paper, the software and hardware design of vehicle vacuum pump control system was carried out based on single-chip microcomputer technology. Combined with structure principle, power supply, barometric pressure sensor, current detection, motor drive is HS08 series as core. The strategy for signal acquisition, driving has been completed, dual electric vehicles developed. can diag...

With the advent of recent coronavirus pandemic, it has become crucial to maintain social distancing within public spaces. To achieve this, is important keep a count number people entering premises and low occupancy it. This article presents very large area pressure sensor based on nickel sulfide deposited paper using facile hydrothermal, sheet vacuum filtration technique followed by an encapsul...

In this work, an optical fiber vacuum sensor based on a single-mode multimode (SMS) structure coated with polydimethylsiloxane (PDMS) is studied. The SMS generates interferometric pattern interference. dip-coated layer of PDMS, whose properties change when it subjected to varying pressure. Different strategies are applied in attempt improve the final performance sensor, such as decreasing diame...

The mechanical design for both the insulating vacuum system and the cavity vacuum system of the APT ED&D Cryomodule is summarized. The pre-cooldown pressure limits for the insulating vacuum and the cavity vacuum are 10 -5 Torr and 10 -6 Torr, respectively. In addition, the cold cavity operating pressure limits are 10 -6 Torr for the insulating system and 10 -8 Torr for the cavity system. The de...

There is a growing concern to monitor the pressure inside the vacuum interrupters for their integration into the network and to ensure their reliability. At present, traditional methods to measure degree of vacuum inside a vacuum interrupter cannot be applied universally and are generally design specific. Some of the methods described in the literature can only be applied in laboratory conditio...

The three major vacuum systems serving the two-mile accelerator, the optical alignment system light pipe, and the beam switchyard (BSY) transport vacuum chambers are located as shown in Fig. 23-1. The accelerator vacuum system must maintain a very high vacuum in the accelerator to prevent RF electrical breakdown and electron scatter. Thirtytwo subsystems evacuate the accelerator to a design pre...

In this work, we describe an improved thermal-vacuum compatible flat plate radiometric source which has been developed and utilized for the characterization and calibration of remote optical sensors. This source is unique in that it can be used in situ, in both ambient and thermal-vacuum environments, allowing it to follow the sensor throughout its testing cycle. The performance of the original...