[Halla_running] [New Logentry] No cryotargets this weekend - solid target running only

[gaskelld at jlab.org]

Logentry Text:
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The issue with the Hall A cryotarget has been found and a fix is in progress. Unfortunately, investigation and correction of the problem required letting up the vacuum in the scattering chamber. By the time the vacuum would be good enough to try and cool down, it would be too late in the day on Friday.

The good news is that the scattering chamber vacuum should be good enough for us to begin to receive beam Friday evening. We will run solid targets until early next week, when we can hopefully try another cooldown.

Please note that even though we will not be running with cryogenic targets this weekend, we will still need someone on shift who is able to operate the target motion mechanism. After consulting with J-P, he said that this function could be handled by anyone who has sat through the classroom target training. So those collaborators who took the classroom target training today, but have not had the practical, should feel free to sign up for "target" shifts over the weekend. 

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3304526
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