July 22, 2021 KLONG Design Meeting
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Meeting Time and Place
Thursday July 22, 2021, 1pm Bluejeans https://bluejeans.com/465620466
- Present - Hovanes Egiyan, Moskov Amaryan, Stephanie Worthington, Keith Harding, Igor Strakovsky, Tim Whitlatch, Mark Stevens, Johan Messchendorp
Agenda
- Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/July_08,_2021_KLONG_Design_Meeting
- Media:KLONG_Be_target_overall.pdf
- Beryllium quotes - $11K
- Beryllium sealing
- Progress on Tungsten cooling
- Poly compression
- Preliminary 3D Model
- Support levelers/rollers
- Tungsten cooling
- 7 cm tube downstream to allow cooling tubes for tungsten
- Be target holder
- lead geometry/weight
- Borated Poly geometry
- Heat absorbed by Be and Tungsten (.6kw and 6Kw respectively)
- Requirements:
- Cool tungsten plug to below temperature that affects lead (327°C)
- 5 cm beam tube to PS and 6 cm to final target
- Moveable out of beamline
- Be 98% pure or better
Minutes and Action Items
- We looked at the 3D model and all looks reasonable. The support frame needs to be analyzed for stress and deflection
- It was decided that the 3D model of the beryllium target was adequate for now and we should move onto the rest of the collimator cave beamline
- Tim proposed to RadCon that we wrap the beryllium in aluminum foil to prevent contamination. Waiting on reply
- Discussion with RadCon leads to using a local cooling loop for cooling the tungsten. A more in depth analysis needs to be done to use the existing LCW
- Discussed settling/compression of borated poly over time. Will probably need steel stand offs to prevent this.
- Tungsten cooling concept was shown and a preliminary analysis shows ok. Beryllium should need no cooling besides small air flow
- Intro of Johan to do thermal energy absorption in the beryllium and tungsten
Action Items
- Proceed with collimator beamline layout - Keith
- Analyze the support structure for stress/deflection - Tim
- Follow up with RadCon on aluminum wrapped beryllium - Tim
- Follow up on poly compression/standoffs - Tim/Keith