Chris Tutt AMS-02 Phase II Safety Review 1

Tracker Alignment System

Chris Tutt

AMS-02 Project Manager

Chris Tutt AMS-02 Phase II Safety Review 2

Review of Hazard

Hazard 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.

Chris Tutt AMS-02 Phase II Safety Review 3

TAS System Schematic

Chris Tutt AMS-02 Phase II Safety Review 4

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.

Chris Tutt AMS-02 Phase II Safety Review 5

Upper LBBXs Installed Position

Chris Tutt AMS-02 Phase II Safety Review 6

TRD/UTOF Installed Position

Chris Tutt AMS-02 Phase II Safety Review 7

Lower LBBX Installed Position

Chris Tutt AMS-02 Phase II Safety Review 8

Lower USS Installed Position

Chris Tutt AMS-02 Phase II Safety Review 9

LFCR Installed Position

Chris Tutt AMS-02 Phase II Safety Review 10

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.