Improving the thermal stability of a CCD through clocking

Cullen H. Blake; Dan Li; Joseph R. Tufts; Joe Ninan; Suvrath Mahadevan; Chad Bender; Fred R. Hearty; Andy Monson; Mark Giovinazzi

doi:10.1117/1.JATIS.5.4.041510

Improving the thermal stability of a CCD through clocking

Cullen H. Blake, Dan Li, Joseph R. Tufts, Joe Ninan, Suvrath Mahadevan, Chad Bender, Fred R. Hearty, Andy Monson, Mark Giovinazzi

Research output: Contribution to journal › Article › peer-review

Abstract

Modern precise radial velocity spectrometers are designed to infer the existence of planets orbiting other stars by measuring few-nm shifts in the positions of stellar spectral lines recorded at high spectral resolution on a large-area digital detector. While the spectrometer may be highly stabilized in terms of temperature, the detector itself may undergo changes in temperature during readout that are an order of magnitude or more larger than the other optomechanical components within the instrument. These variations in detector temperature can translate directly into systematic measurement errors. We explore a technique for reducing the amplitude of CCD temperature variations by shuffling charge within a pixel in the parallel direction during integration. We find that this "dither clocking" mode greatly reduces temperature variations in the CCDs being tested for the NEID spectrometer. We investigate several potential negative effects this clocking scheme could have on the underlying spectral data.

Original language	English (US)
Article number	041510
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	5
Issue number	4
DOIs	https://doi.org/10.1117/1.JATIS.5.4.041510
State	Published - Oct 1 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Control and Systems Engineering
Instrumentation
Astronomy and Astrophysics
Mechanical Engineering
Space and Planetary Science

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10.1117/1.JATIS.5.4.041510

Cite this

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title = "Improving the thermal stability of a CCD through clocking",

abstract = "Modern precise radial velocity spectrometers are designed to infer the existence of planets orbiting other stars by measuring few-nm shifts in the positions of stellar spectral lines recorded at high spectral resolution on a large-area digital detector. While the spectrometer may be highly stabilized in terms of temperature, the detector itself may undergo changes in temperature during readout that are an order of magnitude or more larger than the other optomechanical components within the instrument. These variations in detector temperature can translate directly into systematic measurement errors. We explore a technique for reducing the amplitude of CCD temperature variations by shuffling charge within a pixel in the parallel direction during integration. We find that this {"}dither clocking{"} mode greatly reduces temperature variations in the CCDs being tested for the NEID spectrometer. We investigate several potential negative effects this clocking scheme could have on the underlying spectral data.",

author = "Blake, {Cullen H.} and Dan Li and Tufts, {Joseph R.} and Joe Ninan and Suvrath Mahadevan and Chad Bender and Hearty, {Fred R.} and Andy Monson and Mark Giovinazzi",

note = "Funding Information: We thank the organizers of ISPA-2018 for organizing a very informative workshop. This work was carried out in part at the Singh Center for Nanotechnology at the University of Pennsylvania, which was supported by the NSF National Nanotechnology Coordinated Infrastructure Program under Grant No. NNCI-1542153. NEID was funded by NASA through JPL by contract 1547612. Mark Giovinazzi is supported by an NSF Graduate Research Fellowship. The authors would like to thank an anonymous referee for insightful suggestions that helped to improve this manuscript. Disclosures: The authors have no conflicts of interest to declare. Publisher Copyright: {\textcopyright} 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).",

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T1 - Improving the thermal stability of a CCD through clocking

AU - Blake, Cullen H.

AU - Li, Dan

AU - Tufts, Joseph R.

AU - Ninan, Joe

AU - Mahadevan, Suvrath

AU - Bender, Chad

AU - Hearty, Fred R.

AU - Monson, Andy

AU - Giovinazzi, Mark

N1 - Funding Information: We thank the organizers of ISPA-2018 for organizing a very informative workshop. This work was carried out in part at the Singh Center for Nanotechnology at the University of Pennsylvania, which was supported by the NSF National Nanotechnology Coordinated Infrastructure Program under Grant No. NNCI-1542153. NEID was funded by NASA through JPL by contract 1547612. Mark Giovinazzi is supported by an NSF Graduate Research Fellowship. The authors would like to thank an anonymous referee for insightful suggestions that helped to improve this manuscript. Disclosures: The authors have no conflicts of interest to declare. Publisher Copyright: © 2019 Society of Photo-Optical Instrumentation Engineers (SPIE).

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Modern precise radial velocity spectrometers are designed to infer the existence of planets orbiting other stars by measuring few-nm shifts in the positions of stellar spectral lines recorded at high spectral resolution on a large-area digital detector. While the spectrometer may be highly stabilized in terms of temperature, the detector itself may undergo changes in temperature during readout that are an order of magnitude or more larger than the other optomechanical components within the instrument. These variations in detector temperature can translate directly into systematic measurement errors. We explore a technique for reducing the amplitude of CCD temperature variations by shuffling charge within a pixel in the parallel direction during integration. We find that this "dither clocking" mode greatly reduces temperature variations in the CCDs being tested for the NEID spectrometer. We investigate several potential negative effects this clocking scheme could have on the underlying spectral data.

AB - Modern precise radial velocity spectrometers are designed to infer the existence of planets orbiting other stars by measuring few-nm shifts in the positions of stellar spectral lines recorded at high spectral resolution on a large-area digital detector. While the spectrometer may be highly stabilized in terms of temperature, the detector itself may undergo changes in temperature during readout that are an order of magnitude or more larger than the other optomechanical components within the instrument. These variations in detector temperature can translate directly into systematic measurement errors. We explore a technique for reducing the amplitude of CCD temperature variations by shuffling charge within a pixel in the parallel direction during integration. We find that this "dither clocking" mode greatly reduces temperature variations in the CCDs being tested for the NEID spectrometer. We investigate several potential negative effects this clocking scheme could have on the underlying spectral data.

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Improving the thermal stability of a CCD through clocking

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