[Esr-users] Hall B - Torus and Solenoid - Runs with different polarities 04.18.2019

[burkert]

Thanks Ruben! That is good news. It provides  more flexibility in how we 
deal with systematic effects in future data taking.
Volker

On 4/19/19 11:49 AM, Ruben Fair wrote:
>
> All,
>
>
> The Torus (+3770 A) and Solenoid (+2416 A) simultaneous run was 
> successful.
>
>
> Both magnets are now down at zero amps and PSUs are locked out.
>
>
> No further magnet energization runs have been planned for the 
> immediate future.
>
>
> Regards
>
>
> Ruben
>
>
>
> ------------------------------------------------------------------------
> *From:* Ruben Fair
> *Sent:* Thursday, April 18, 2019 7:04 PM
> *To:* Volker Burkert; Bob Miller; Denny Insley
> *Cc:* Probir Ghoshal; Nicholas Sandoval; David Kashy
> *Subject:* Hall B - Torus and Solenoid - Runs with different 
> polarities 04.18.2019
>
> Good evening all,
>
>
> Here is a summary of our tests today:
>
>
> 1.
>     Torus +3770 A, Solenoid +2416 A - OK
> 2.
>     Torus +3770 A, Solenoid -2416 A - OK
> 3.
>     Torus -3770 A, Solenoid -2416 A - OK
> 4.
>     Torus -3770 A, Solenoid +2416 A - this was actually already done
>     in Dec 2018 (the magnets stayed in this configuration from
>     12/12/18 to 12/19/18)
>
>
> The load cell readings for both magnets changed only marginally for 
> Cases 2 and 3, when compared to the values observed for Case 1.
>
>
> The relevant log entries are:
>
>
> 1.
>     https://logbooks.jlab.org/entry/3679560
> 2.
>     https://logbooks.jlab.org/entry/3679643
> 3.
>     https://logbooks.jlab.org/entry/3679665
>
>
> Denny,
>
> Both magnets are now at zero Amps. We shall lock out the PSUs and turn 
> off the beacons, so Todd and Calvin can use the crane tomorrow at 
> 06:30am as planned.
>
> Tomorrow morning at 8am we shall do one final run at:
>
>
> Torus +3770 A, Solenoid +2416 A to ensure that nothing has changed.
>
>
>
> Regards
>
> Ruben
>
>

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