MUST2 SAMURAI_2018 S3-LEB-LPC SUPERNEMO MUGAST EXPAND SCALP GALATRON HiCARI VELO
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Message ID: 589     Entry time: Sun Jun 17 11:12:57 2018
Author: takeshi 
ExpNbr: e755 
Type: TARGET 
Category: Hardware 
Status: Ongoing 
Target-Source: N/A 
Subject: current cooling status of the cryogenic target 
This is the temperature log of the cryogenic hydrogen target during the cooling test done last night.
The temperature of the heat shield (green line) and the cell (blue line) increased while it went the minimum values at once.

We could not try liquefying test this morning because the temperature was not enough low.
I would attach the boiling points of several gases in a vacuum. We suspect the rebound of the temperature is due to adsorption of vapour such as N2 at 20 K and H20 at 150 K.

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