Chris Tutt AMS-02 Phase II Safety Review 1

Tracker Alignment System

Chris TuttAMS-02 Project Manager

Chris Tutt AMS-02 Phase II Safety Review 2

Review of HazardHazard to be addressed is uncontrolled

use of lasers causing optical damage to personnel or equipment.

Tracker Alignment System (TAS) uses a series of infrared lasers to measure relative movements of the tracker planes.

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TAS System Schematic

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Laser Safety Analysis Nominal Optical Hazard Distance (NOHD)

calculated for TAS lasers at three key locations in the system per ANSI standard. Emission at diode window: 2.78 cm Emission at LFCR output: 4.64 cm Emission at LBBX output: 6.81 m

Only LBBX output is significant distance, but that beam is trapped in tracker inner volume.

Tracker inner volume has light-tight vents. All TAS hardware underneath MLI blankets.

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Upper LBBXs Installed Position

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TRD/UTOF Installed Position

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Lower LBBX Installed Position

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Lower USS Installed Position

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LFCR Installed Position

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Proposed Safety Controls TAS lasers are low-power, diffuse, and

completely contained within tracker inner volume.

No special safety controls are needed during nominal operations. LBBXs are inaccessible to ground personnel without

dismantling payload. LFCRs are accessible if MLI removed, but any

maintenance operations would be done by trained personnel.

TAS system will only be powered on during most of KSC stay.

KSC concurrence documented in Use Authorization K-GU-50101.