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Proceedings Paper

Development of the LSST raft tower modules
Author(s): P. O'Connor; I. Kotov; P. Z. Takacs; J. S. Frank; S. Plate; R. Van Berg; M. Newcomer; P. Antilogus; Hervé Lebbolo; V. Tocut; C. Juramy; P. Doherty; N. Felt
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Paper Abstract

The science focal plane of the Large Synoptic Survey Telescope is made up of 21 modules designated "raft towers". Each raft tower module (RTM) is an autonomous, fully-testable and serviceable 144 Mpixel imager consisting of nine highly-segmented CCDs with complete readout electronics chain. To minimize noise and obscuration the RTM is housed in a compact enclosure fully contained within the camera cryostat. The RTM is required to meet strict performance goals for image plane flatness, readout speed, noise, and power dissipation. Key components include the 4K × 4K fully-depleted CCDs with 16 outputs each, ceramic CCD support structure, and ASIC electronics for video processing and clock/bias generation. In addition to CCD signal handling, the RTM electronics also includes monitoring for temperature, voltage, and current, makeup heater control, ASIC configuration and readback, powerdown modes, and specialized diagnostic outputs. Digitized data are transmitted out of the camera cryostat over a single 3Gb/s serial link.

Paper Details

Date Published: 25 September 2012
PDF: 13 pages
Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 84530L (25 September 2012); doi: 10.1117/12.926645
Show Author Affiliations
P. O'Connor, Brookhaven National Lab. (United States)
I. Kotov, Brookhaven National Lab. (United States)
P. Z. Takacs, Brookhaven National Lab. (United States)
J. S. Frank, Brookhaven National Lab. (United States)
S. Plate, Brookhaven National Lab. (United States)
R. Van Berg, Univ. of Pennsylvania (United States)
M. Newcomer, Univ. of Pennsylvania (United States)
P. Antilogus, Institut National de Physique Nucléaire et de Physique de Particules, CNRS (France)
Univ. Pierre et Marie Curie (France)
Univ. Paris Diderot (France)
Hervé Lebbolo, Institut National de Physique Nucléaire et de Physique de Particules, CNRS (France)
Univ. Pierre et Marie Curie (France)
Univ. Paris Diderot (France)
V. Tocut, Linear Accelerator Lab., CNRS, Univ. Paris Sud 11 (France)
C. Juramy, Institut National de Physique Nucléaire et de Physique de Particules, CNRS (France)
Univ. Pierre et Marie Curie (France)
Univ. Paris Diderot (France)
P. Doherty, Harvard Univ. (United States)
N. Felt, Harvard Univ. (United States)


Published in SPIE Proceedings Vol. 8453:
High Energy, Optical, and Infrared Detectors for Astronomy V
Andrew D. Holland; James W. Beletic, Editor(s)

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