Solar eruptioN Integral Field Spectrograph (SNIFS) Sounding Rocket�SPHERE Workshop 2020

Phillip C. Chamberlin and Vicki Herde, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO (CU/LASP)

Phil.Chamberlin@lasp.colorado.edu

Don J. Schmit, CIRES, U. of Colorado, Boulder

Adrian N. Daw and Qian Gong, NASA Goddard Space Flight Center, Greenbelt, MD

Vanessa Polito, Bay Area Environmental Research Center, Moffett Field, CA

Ryan O. Milligan, Queen’s University Belfast

SPHERE Workshop 2022

1

7/12/22

Goals of the SNIFS Sounding Rocket

• Study the high frequency dynamics – energy and mass flow – in the chromosphere and transition regions associated with small (nanoflares, spicules, RBE/RREs) and large (solar flare) energy releases.
• H I, 121.6nm, log(T):4.2; Si III, 120.65nm, log(T):4.8; O V, 121.83nm, log(T):5.3
• Prove new technology
• Mirrorlet Integral Field Spectrograph, 4MP CMOS detector and software
• Participate in the Solar Flare 2024 Campaign (FOXSI-4 and Hi-C Flare)

SPHERE Workshop 2022

2

7/12/22

RADYN Ly-⍺ Sims: Courtesy V. Polito, BAERI

SNIFS Instrument

• One instrument, two channels (‘RBE/Primary’ and ‘Flare/Secondary’)
• Single telescope focuses on 2x Mirrorlets
• ‘Flare’ channel is bonus and optional
• Data rate, cost, schedule, etc. de-scope
• Mirrorlet is the enabling technology
• Mirrorlet replaces the slit in a slit spectrograph

SPHERE Workshop 2022

3

7/12/22

Top

Side

SNIFS Instrument

• Example lab measurements and what a single ‘spectral row’ should look like in SNIFS

SPHERE Workshop 2022

4

7/12/22

Technology: Integral Field Spectrograph

• SNIFS is an all-reflective Integral Field �Spectrograph (IFS)
• Simultaneous 2 spatial and 1 spectral dimensions �without any moving parts
• High cadence spectral imaging as no scanning �required – now at 1 second cadence!
• High spectral resolution over a limited spectral range
• Multiple emission lines and Doppler Shifts and thermal broadening

SPHERE Workshop 2022

5

7/12/22

Courtesy D. Schmit