After cleaning the particles, samples intended for XPS analysis were placed in glass vials, flushed with N2, crimped, and transported in vacuum containers capable of maintaining vacuum of 14.7" Hg for over 24h, (Desi-Vac 700 mL containers, Cole palmer, USA).
After placing the device on the microscope or in the incubator, house vacuum was used to maintain continuous vacuum.
They vacuums were assigned to each individual of the district and it is the individuals responsibility to maintain the vacuum and clean it daily.
To eliminate the problem, commercial versions of his devices will need a low-cost covering that can maintain a vacuum.
To maintain the vacuum the flywheel is in a sealed chamber, and a magnetic coupling is used.
No active pumping system was integrated, though a non-evaporable getter was fabricated in an attempt to maintain the vacuum environment.
Adsorption chillers with common refrigerants (water, ethanol, methanol, etc.) face the problem that advanced technologies and intricate design considerations are required to maintain high vacuum.
Coupling joints (made of Teflon) are used to fit the glass envelope tube at both ends to achieve an airtight enclosure and maintain a vacuum inside the solar receiver tube.
The gate valve is able to maintain a vacuum of <10−10 mbar at the ICR cell when the source is vented to atmosphere and the estimated ion transfer efficiency is >95%.
A steel stopper device helped to maintain the vacuum in the syringe during the aspiration phase.
Further pumping systems along the ion flight tube maintain the vacuum at 2 × 10−9 mbar.
