Ghosts of NEID's past

Shubham Kanodia; Joe P. Ninan; Andrew J. Monson; Suvrath Mahadevan; Colin Nitroy; Christian Schwab; Samuel Halverson; Chad F. Bender; Ryan Terrien; Frederick R. Hearty; Emily Lubar; Michael W. McElwain; Lawrence W. Ramsey; Paul M. Robertson; Arpita Roy; Gudmundur Stefansson; Daniel J. Stevens

doi:10.1117/12.2561679

Ghosts of NEID's past

Shubham Kanodia^*, Joe P. Ninan, Andrew J. Monson, Suvrath Mahadevan, Colin Nitroy, Christian Schwab, Samuel Halverson, Chad F. Bender, Ryan Terrien, Frederick R. Hearty, Emily Lubar, Michael W. McElwain, Lawrence W. Ramsey, Paul M. Robertson, Arpita Roy, Gudmundur Stefansson, Daniel J. Stevens

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

2 Citations (Scopus)

Abstract

The NEID spectrograph is a R ∼ 120,000 resolution fiber-fed and highly stabilized spectrograph for extreme radial velocity (RV) precision. It is being commissioned at the 3.5 m WIYN telescope in Kitt Peak National Observatory with a desired instrumental precision of better than 30 cm s^-1. NEID's bandpass of 380 - 930 nm enables the simultaneous wavelength coverage of activity indicators from the Ca HK lines in the blue to the Ca IR triplet in the IR. In this paper we will present our efforts to characterize and mitigate optical ghosts in the NEID spectrograph during assembly, integration and testing, and highlight several of the dominant optical element contributors such as the cross dispersion prism and input optics. We shall present simulations of the 2-D spectrum and discuss the predicted ghost features on the focal plane, and how they may impact the RV performance for NEID. We also present the mitigation strategy adopted for each ghost which may be applied to future instrument designs. This work will enable other instrument builders to potentially avoid some of these issues, as well as outline mitigation strategies.

Original language	English
Title of host publication	Ground-Based and Airborne Instrumentation for Astronomy VIII
Editors	Christopher J. Evans, Julia J. Bryant, Kentaro Motohara
Place of Publication	Bellingham, Washington
Publisher	SPIE
Pages	1144740-1-1144740-12
Number of pages	12
ISBN (Electronic)	9781510636828
ISBN (Print)	9781510636811
DOIs	https://doi.org/10.1117/12.2561679
Publication status	Published - 13 Dec 2020
Event	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020 - Virtual, Online, United States Duration: 14 Dec 2020 → 22 Dec 2020

Publication series

Name	Proceedings of SPIE
Publisher	SPIE
Volume	11447
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Ground-Based and Airborne Instrumentation for Astronomy VIII 2020
Country/Territory	United States
City	Virtual, Online
Period	14/12/20 → 22/12/20

Keywords

Ghost analysis
Optical design
Scattered light
Spectrometer

Access to Document

10.1117/12.2561679

Cite this

Kanodia, S., Ninan, J. P., Monson, A. J., Mahadevan, S., Nitroy, C., Schwab, C., Halverson, S., Bender, C. F., Terrien, R., Hearty, F. R., Lubar, E., McElwain, M. W., Ramsey, L. W., Robertson, P. M., Roy, A., Stefansson, G., & Stevens, D. J. (2020). Ghosts of NEID's past. In C. J. Evans, J. J. Bryant, & K. Motohara (Eds.), Ground-Based and Airborne Instrumentation for Astronomy VIII (pp. 1144740-1-1144740-12). Article 1144740 (Proceedings of SPIE; Vol. 11447). SPIE. https://doi.org/10.1117/12.2561679

@inproceedings{a4e342135524455da16d7379f75a0ebf,

title = "Ghosts of NEID's past",

abstract = "The NEID spectrograph is a R ∼ 120,000 resolution fiber-fed and highly stabilized spectrograph for extreme radial velocity (RV) precision. It is being commissioned at the 3.5 m WIYN telescope in Kitt Peak National Observatory with a desired instrumental precision of better than 30 cm s-1. NEID's bandpass of 380 - 930 nm enables the simultaneous wavelength coverage of activity indicators from the Ca HK lines in the blue to the Ca IR triplet in the IR. In this paper we will present our efforts to characterize and mitigate optical ghosts in the NEID spectrograph during assembly, integration and testing, and highlight several of the dominant optical element contributors such as the cross dispersion prism and input optics. We shall present simulations of the 2-D spectrum and discuss the predicted ghost features on the focal plane, and how they may impact the RV performance for NEID. We also present the mitigation strategy adopted for each ghost which may be applied to future instrument designs. This work will enable other instrument builders to potentially avoid some of these issues, as well as outline mitigation strategies.",

keywords = "Ghost analysis, Optical design, Scattered light, Spectrometer",

author = "Shubham Kanodia and Ninan, {Joe P.} and Monson, {Andrew J.} and Suvrath Mahadevan and Colin Nitroy and Christian Schwab and Samuel Halverson and Bender, {Chad F.} and Ryan Terrien and Hearty, {Frederick R.} and Emily Lubar and McElwain, {Michael W.} and Ramsey, {Lawrence W.} and Robertson, {Paul M.} and Arpita Roy and Gudmundur Stefansson and Stevens, {Daniel J.}",

year = "2020",

month = dec,

day = "13",

doi = "10.1117/12.2561679",

language = "English",

isbn = "9781510636811",

series = "Proceedings of SPIE",

publisher = "SPIE",

pages = "1144740--1--1144740--12",

editor = "Evans, {Christopher J.} and Bryant, {Julia J.} and Kentaro Motohara",

booktitle = "Ground-Based and Airborne Instrumentation for Astronomy VIII",

address = "United States",

note = "Ground-Based and Airborne Instrumentation for Astronomy VIII 2020 ; Conference date: 14-12-2020 Through 22-12-2020",

}

Kanodia, S, Ninan, JP, Monson, AJ, Mahadevan, S, Nitroy, C, Schwab, C, Halverson, S, Bender, CF, Terrien, R, Hearty, FR, Lubar, E, McElwain, MW, Ramsey, LW, Robertson, PM, Roy, A, Stefansson, G & Stevens, DJ 2020, Ghosts of NEID's past. in CJ Evans, JJ Bryant & K Motohara (eds), Ground-Based and Airborne Instrumentation for Astronomy VIII., 1144740, Proceedings of SPIE, vol. 11447, SPIE, Bellingham, Washington, pp. 1144740-1-1144740-12, Ground-Based and Airborne Instrumentation for Astronomy VIII 2020, Virtual, Online, United States, 14/12/20. https://doi.org/10.1117/12.2561679

Ghosts of NEID's past. / Kanodia, Shubham; Ninan, Joe P.; Monson, Andrew J. et al.
Ground-Based and Airborne Instrumentation for Astronomy VIII. ed. / Christopher J. Evans; Julia J. Bryant; Kentaro Motohara. Bellingham, Washington: SPIE, 2020. p. 1144740-1-1144740-12 1144740 (Proceedings of SPIE; Vol. 11447).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

TY - GEN

T1 - Ghosts of NEID's past

AU - Kanodia, Shubham

AU - Ninan, Joe P.

AU - Monson, Andrew J.

AU - Mahadevan, Suvrath

AU - Nitroy, Colin

AU - Schwab, Christian

AU - Halverson, Samuel

AU - Bender, Chad F.

AU - Terrien, Ryan

AU - Hearty, Frederick R.

AU - Lubar, Emily

AU - McElwain, Michael W.

AU - Ramsey, Lawrence W.

AU - Robertson, Paul M.

AU - Roy, Arpita

AU - Stefansson, Gudmundur

AU - Stevens, Daniel J.

PY - 2020/12/13

Y1 - 2020/12/13

N2 - The NEID spectrograph is a R ∼ 120,000 resolution fiber-fed and highly stabilized spectrograph for extreme radial velocity (RV) precision. It is being commissioned at the 3.5 m WIYN telescope in Kitt Peak National Observatory with a desired instrumental precision of better than 30 cm s-1. NEID's bandpass of 380 - 930 nm enables the simultaneous wavelength coverage of activity indicators from the Ca HK lines in the blue to the Ca IR triplet in the IR. In this paper we will present our efforts to characterize and mitigate optical ghosts in the NEID spectrograph during assembly, integration and testing, and highlight several of the dominant optical element contributors such as the cross dispersion prism and input optics. We shall present simulations of the 2-D spectrum and discuss the predicted ghost features on the focal plane, and how they may impact the RV performance for NEID. We also present the mitigation strategy adopted for each ghost which may be applied to future instrument designs. This work will enable other instrument builders to potentially avoid some of these issues, as well as outline mitigation strategies.

AB - The NEID spectrograph is a R ∼ 120,000 resolution fiber-fed and highly stabilized spectrograph for extreme radial velocity (RV) precision. It is being commissioned at the 3.5 m WIYN telescope in Kitt Peak National Observatory with a desired instrumental precision of better than 30 cm s-1. NEID's bandpass of 380 - 930 nm enables the simultaneous wavelength coverage of activity indicators from the Ca HK lines in the blue to the Ca IR triplet in the IR. In this paper we will present our efforts to characterize and mitigate optical ghosts in the NEID spectrograph during assembly, integration and testing, and highlight several of the dominant optical element contributors such as the cross dispersion prism and input optics. We shall present simulations of the 2-D spectrum and discuss the predicted ghost features on the focal plane, and how they may impact the RV performance for NEID. We also present the mitigation strategy adopted for each ghost which may be applied to future instrument designs. This work will enable other instrument builders to potentially avoid some of these issues, as well as outline mitigation strategies.

KW - Ghost analysis

KW - Optical design

KW - Scattered light

KW - Spectrometer

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DO - 10.1117/12.2561679

M3 - Conference proceeding contribution

AN - SCOPUS:85107480879

SN - 9781510636811

T3 - Proceedings of SPIE

SP - 1144740-1-1144740-12

BT - Ground-Based and Airborne Instrumentation for Astronomy VIII

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T2 - Ground-Based and Airborne Instrumentation for Astronomy VIII 2020

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ER -

Ghosts of NEID's past

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