4.7.2.6  Check List - When Hall A is Used as Accelerator Beam Dump

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Clean power in Hall A is to be turned off.

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Spectrometers rotated out of beam direction.

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Targets in extracted position.

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Drift Chamber gases are turned off at gas shed.

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Confirm clean/safe status of shield house area and Hall.

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Beamline to dump configured appropriate for beam energy/current

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Confirm that any hall ventilation which exhausts air to the environment is turned off.

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Confirm that beamline and target chamber are from unnecessary equipment and clutter.

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Confirm that beam line and target structures have been wiped down in the last six months or since the last maintenance activity to remove dust and grease which presents a source of loose radioactivity. being used.

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Confirm that all magnet power supplies shut-off and locked/tagged at breakers in Hall A or alternately the Hall A console key for both HRS power supplies be in the ``off" position with key removed. The key must be removed from the counting house and held in the possession of one of the following individuals: K. de Jager, J. Proffitt, or E. Folts

                                 
Signature                 Date

Monitoring of superconducting magnets cryogenics done according to normal standby mode procedures.