The H maser that we had at NASA-DSN in the 80´s had a small H2 bottle
which supplied it to the palladium valve, so it could be refilled. We
never needed a refill but once we had to open the plumbing, it was
necessary to reestablish the vacuum before opening the H2 valve. it was
done using a mechanical pump and then a (then unknown to me) "molecular
sieves" pump that was chilled with a bucket of liquid N2. The procedure
was quite convoluted.
Regards,
Ignacio
El 05/07/2019 a las 16:11, Luiz Paulo Damaceno escribió:
Hi friends,
We have a hydrogen maser here at the university that i work. It seems the
hydrogen is over. This is possible? If yes, It is possible to recharge It?
Best regards,
Luiz.
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