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vacuum pumping
A magnetically guarded hairpin limiter reduces the impurity radiation seen in a research tokamak and redirects the scrape-off plasma flux into the vacuum pumping line.
      
An estimate is made of the effective vacuum pumping speed of the halo plasma in a tandem mirror fusion reactor, and it is shown that, if the electron temperature and line density are great enough, the halo can be a very good vacuum pump.
      
Deposition of diamond-like carbon (DLC) film and mass spectrometry measurements were carried out in a closed-space CH4 rf (13.56 MHz) plasma (without both gas injection and vacuum pumping during the process).
      
A grouped high vacuum pumping system with the pumping capacity of 2000 m'/h at 10 Pa has been used to evacuate the tank.
      
An independent vacuum pumping and monitoring system is necessary to guarantee the achievement of low pressures compatible with cavity installations.
      
An improved sodium distillation unit has been designed, and a more reliable vacuum pumping system has been ordered.
      
Disk fabrication is done from the smaller numbered disk to larger by skipping the vacuum pumping disks.
      
Finally 16 vacuum pumping disks and several recovery disks were made.
      
However, the peculiar behaviour appears in the vacuum pumping disks.
      
In situ vacuum pumping was achieved by lumped pumping using ion pumps.
      
In the set-up the bellows and a cavity like structure similarly to the vacuum pumping ports were shielded.
      
In addition, such furnaces are normally provided with a connection to a vacuum pumping system.
      
Subsequently, the samples were evacuated for eight hours without the application of heat during vacuum pumping or prior bake-out conditioning.
      
This low burn fraction results in large vacuum pumping and fuel processing systems to handle the larger DT throughput.
      
This problem is due to a deficiency either in the vacuum pumping system or in the diffuser performance.
      
The CLS is striving to maintain common vacuum monitoring and vacuum pumping components in use throughout the different systems in the facility.
      
The H recoil spectra are shown in Figure 4, which indicate considerable amount of H absorption in the NEG strip due to vacuum pumping action.
      
The vacuum chamber extends to the head of the apparatus by means of a stainless steel tube vacuum jacket which serves as the vacuum pumping line.
      
Then the system was evacuated' by employing a high vacuum pumping system of capacity 2000m3 per hour at 10 Pa.
      
Therefore we performed H depth profiling10 of a pristine NEG strip and the one used in vacuum pumping.
      
 

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