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SOAR at Horizon

This document discusses the various placement options for the laser box in the CTIO optics system, including the pros, cons, and recommendations for each configuration. It also outlines the necessary next steps for studying the laser cooling and control systems.

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SOAR at Horizon

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  1. SOAR at Horizon Telescope Ring Section= 1272.4x336mm Laser Box Width=300-400mm SAM_LGS_1, CTIO, Optics

  2. Yoke-Ring Space near Elevation Axis First conclusion: Laser Box cant go on the low side of the ring neither above the Elevation axis. SAM_LGS_1, CTIO, Optics

  3. Laser Box Size • Laser Head(+Connectors):~900x140x90mm • Space (Align/Dump Mirror):~150mm • Beam Expander: 141xF31.75mm (could be up to 200xF50mm) • Compensator: 110x230x166mm (because of rotator and vernier) • Steering Mirror stand:~50x50mm • Extra Width (Align.Laser/mirror):~100mm • Extra Length (Beam/Align Camera):~100mm • Base Plate/Table: 25.4 to 60mm Laser Box Estimate: 1510x330x226mm Laser Box Mock : 1600x400x250mm SAM_LGS_1, CTIO, Optics

  4. Soleil-Babinet Compensator 8-500-UV-25 from Special Optics CA=25mm, Max. Retardation=400nm, Resolution=0.5nm and Price= $4.150 Space needed (lxwxh)=110x229.4x165.4mm SAM_LGS_1, CTIO, Optics

  5. Laser Control and Cooler SAM_LGS_1, CTIO, Optics

  6. Laser Box on Truss Pros: one mirror less, follows serrurier flexure Cons: mechanical support?, adjustable M3 on LLT, ~70Kg on one truss? SAM_LGS_1, CTIO, Optics

  7. Laser Box Horizontal on SOAR Ring Pros: beam is folded up along a truss then over a spider arm so can be protected, M3 on LLT fixed. Cons: a shelf must be made on the telescope ring, the cable end of the box is positioned opposite to the nasmyths (could be good for the electronics control but bad for the cooling system). SAM_LGS_1, CTIO, Optics

  8. Laser Box (Hor./Vert.) at Bent-Cass port 2 Pros and Cons are the same as for all vertical (except on truss) and horizontal configurations, i.e. one mirror less and adjustable M3 on LLT v/s M3 fixed and one mirror more (M5). But the bent-cass port has one extra advantage, i.e. we can use the instrument holes that are already there. SAM_LGS_1, CTIO, Optics

  9. Pros: most convenient from installation point of view. Cons: only F60mm space for fold mirror M5 and protecting tube and protection tube in the way of the SOAR M1 covers. Proposal: LB in same position but Outside the Tel.Ring (orange) Laser Box Into the Bent-Cass port 2 M3 M4 M5 SAM_LGS_1, CTIO, Optics

  10. To Do List • Study the Laser cooling system • Study the laser control system SAM_LGS_1, CTIO, Optics

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