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Four beryllium evaporators were fitted onto the JET vessel during March 1989. These evaporators give the first introduction of beryllium into the JET machine to study its effect as a first wall material. Over 200 hours operational experience with such an evaporator had been gained previously on a test bed facility, in which the evaporation rate, radial evaporant distribution and head operating temperature had been determined. The results obtained on this facility with two different head materials, sintered S-65B and vacuum cast beryllium, are described. The test vessel has also been used to conduct beryllium wall pumping experiments using the "Langmuir effect". The initial results of these experiments are also described.

Additional information

Authors: PEACOCK A T ET AL., JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-R(90)02 EN (1990) 25pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199010996 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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