Beam startup/recovery Procedure: This procedure is required for major beam down: more than 2 hours or so.

• Initial requirements:
1. Beam energy lock: ON Hall A
2. Fast feedback lock: ON
3. Target: Empty target
4. Raster: OFF
• Setup beam to Hall:
1. Let MCC tune beam through Compton chicane with 2 μA beam.
2. Make sure BPM A and B readings are within accepted range (see whiteboard).
• Harp Scan:
1. Ask MCC to do a harp scan, make sure beam σ_x,y within 100 - 300 μm on both hall A harps.
• Beam position check with BeO target:
1. Move target to BeO, ask for 2μA beam with raster off.
2. Make sure the beam spot on the camera matching the marker.
3. Ask for 4x4 (MCC unit) raster, take L-HRS data with T1 trigger only. Do spot++ to verify the raster size: 3x3 mm².
• Clearance check on LD2 target:
1. Move to LD2 target, keep 4x4 (MCC units) raster and 2 μA beam.
2. Check rate with reference number posted on the right side of the scaler monitor.
3. Take L-HRS T1 data and check raster size with spot++: 3x3 mm². Make sure no sign of cell wall hitting.
4. Ask for 6x6 (MCC unit) raster and make sure rates stay the same.
5. One more run and spot++ to check raster size, 4x4 mm², and no touching of cell walls.
• Now beam is good to go:
1. Make sure the VDC high voltage is OFF for production or any high rate tests.
2. Ramp current slowly, keep an eye on the LD2 target temperature.
3. Start to take data and have fun.