[Hallb] good beam for HPS run last night

Stepan Stepanyan stepanya at jlab.org
Thu Apr 23 09:07:59 EDT 2015

Dear all,

As of 1 am today we had a wonderful beam on HPS target. Many thanks to MCC
crew for delivering and maintaining a good beam quality throughout the 
Of course all kudos to Arne Freyberger for tuning beam for HPS. The 
quality and
the profile of the 1.056 GeV beam fully met the requirements. Shortly 
after getting
the nice beam we were able to establish the production running 
conditions and
started the HPS detector commissioning.

Hall-B will be in restricted access during the day for 12 GeV work. We 
will close
again at/around 4pm. For system experts, please make sure your system is 
prior the closing of the hall. Last night we lost 2 hours due to open 
vacuum valves.
We do not have much time and losses like that are unacceptable.

Regards, Stepan

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