Improved Ta Level Indicator for Liquid He

概要

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In this paper are described improvements of the level indicator fixed in a cryostat by using combination of Ta short coils and a Ta long solenoid wound together with insulated heater wire. The short coil indicates accurately whether liquid surface is above or below it even when liquid He is being transferred. Its response time is a few tenths of a second. The long solenoid indicates liquid level continuously and with much less response time, but its indication is always about 5mm more than actual depth in static condition and 10〜20mm more during liquid transfer. Total power consumption in the probe is less than 20 milliwatts.
社団法人応用物理学会の論文
1970-05-05