[Hallb-engineering] [New Logentry] Follow-up Re: Hall B Torus/Solenoid Force Interaction Studies

[kashy at jlab.org]

Logentry Text:
--
We ramped the Torus to -3770A with a setpoint of -3775A which is 100% of full current in the Negative = CW direction with the Solenoid still at Full current in the Positive = DS direction.

This is the first time the Torus has been ramped to Negative full current. The previous max ramp in CW direction was -1900A. 
This proves out the full capability of the two magnets for the first couple of experiments in Hall B. The last variable is the solenoid in negative polarity and the decision was made previously to postpone that test as negative field should not to be needed for a couple of years.

Some observations:
All Coil C OOPS went to zero at about -2500A. This is a bit odd as the coil is thus only suspended at the 4 corners but this is not distressing.
We had to reset one OOPS force limit as we had to with the positive full field ramp. This time it was OOPS on Coil E #3 and we changed the controlled ramp from 1300 to 1500lbs. We also closely watched Coil F OOPS #3 as it slowly marched up to 1110lbs but stopped short of the 1300lb trip value
All the same conclusions of previous entry apply.
Voltages on both magnets all looked fine
Cryogenically all looked very good.

Next steps are to ramp down the Solenoid to 0 field then ramp the Torus down to 0.



---

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/3486142
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_015443.gif
Type: image/gif
Size: 67788 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0012.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_015447.gif
Type: image/gif
Size: 67140 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0013.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_015451.gif
Type: image/gif
Size: 142445 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0014.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_015613.gif
Type: image/gif
Size: 60858 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0015.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_015649.gif
Type: image/gif
Size: 78645 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0016.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_020200.gif
Type: image/gif
Size: 83664 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0017.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_020212.gif
Type: image/gif
Size: 86298 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0018.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc21_20170928_020219.gif
Type: image/gif
Size: 75527 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0019.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc12_20170928_020317.gif
Type: image/gif
Size: 57322 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0020.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc12_20170928_020324.gif
Type: image/gif
Size: 57263 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0021.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc12_20170928_020732.gif
Type: image/gif
Size: 71715 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0022.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: clonpc12_20170928_020340.gif
Type: image/gif
Size: 63714 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/hallb-engineering/attachments/20170928/3a1b95b1/attachment-0023.gif>