LSST craft raft integration support equipment: design, assembly, and test status

Travis Lange; Boyd Bowdish; Stefano Russo; Stephen Tether; Seth W. Digel; Tony Johnson; Scott P. Newbry; Andrew P. Rasmussen; Vincent T. Lee; Kevin A. Reil; Tim Bond; Giorgio Dho

doi:10.1117/12.2310061

6 July 2018 LSST craft raft integration support equipment: design, assembly, and test status

Travis Lange, Boyd Bowdish, Stefano Russo, Stephen Tether, Seth W. Digel, Tony Johnson, Scott P. Newbry, Andrew P. Rasmussen, Vincent T. Lee, Kevin A. Reil, Tim Bond, Giorgio Dho

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107024J (2018) https://doi.org/10.1117/12.2310061
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

We present the mechanical device used to install the Raft Tower Modules (RTMs) into the cryosat of the camera for the Large Synoptic Survey Telescope (LSST). In an RTM, the charge-coupled devices (CCDs) are packaged into a 3 x 3 Raft Sensor Assembly (RSA) and coupled to a Raft Electronics Crate (REC). An RTM weighs ~10 kg, is roughly 500 mm tall, and has a 126.5 mm-square footprint at the CCDs. The grid array which supports the RTM in the cryostat has a center-to-center distance of 127 mm. One of the key challenges for installing the RTMs in the 500 μm gap between CCDs of adjacent modules - contact between adjacent CCDs is strictly forbidden.

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Travis Lange, Boyd Bowdish, Stefano Russo, Stephen Tether, Seth W. Digel, Tony Johnson, Scott P. Newbry, Andrew P. Rasmussen, Vincent T. Lee, Kevin A. Reil, Tim Bond, and Giorgio Dho "LSST craft raft integration support equipment: design, assembly, and test status", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107024J (6 July 2018); https://doi.org/10.1117/12.2310061

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