[Isotope-prod] 1100 meeting today

[Kevin Jordan]

Dear Colleagues,
Link to 1100 meeting:
https://bluejeans.com/294836101?src=calendarLink

Many things went well last week; we got the machine up & running, the first exposure on the foil stack (Ni, Va, & Ga71) went perfectly, the test irradiation of the solid graphite block went well, and the machine ran great with no trips for more than a shift. A number of trim magnets went off loop in the early hours of Friday morning. After some work on the trims beam was turned back on CW, there was another BLM trip more trim work & back to CW, this time it resulted in a vacuum leak & the run was halted.

Here are some photos...

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The entire vault is posted as a radiation area as of 1/20/21

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Entrance to the 1X dipole

[cid:91E2D497-1180-4A35-AFF8-D0D15E209347]
Beryllium window, looks like duct tape behind window on Beamline

[IMG_0425.jpg]
Back side of Tungsten radiator, it shows excessive oxidation

[IMG_0409.jpg]
Front side of tungsten - the supporting screws over constrained tungsten and should have been oversized. The nut at the top of the photo is the nitrogen purge

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This handle used to be red…

[cid:CC94F56E-4A09-4635-904E-A403281F8D64]
Front of crucible, metal shim is 440A stainless steel

[cid:9829E32E-C789-40C8-A1DA-AB894ED74D7E]
Base assembly showing heat zone

[cid:5047AE9A-2499-4FB5-807D-5F07FB2190DB]
Crucible showing no damage



[https://logbooks.jlab.org/files/2021/01/3863202/LERF_beamstrike1.jpg][https://logbooks.jlab.org/files/2021/01/3863202/LERF_beamstrike1.jpg]
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