[time-nuts] Choice of MASER gas

Mark Kahrs mark.kahrs at gmail.com
Thu Sep 2 13:30:46 UTC 2010

John Miles brought up an interesting question that got lost in the
discussion of high vacuum systems: what about the choice of gas?

Besides H, there is a dual Xe/He system detailed in:


And, as mentioned before, Harvard has built Rb masers:


And John mentioned HN3 masers (advantage: you would be able to smell the

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