A Caltech Library Service

The fourth flight of CHESS: spectral resolution enhancements for high-resolution FUV spectroscopy

Kruczek, Nicholas and Nell, Nicholas and France, Kevin and Hoadley, Keri and Fleming, Brian and Stefan, Ulrich and Miller, Alexander D. and Egan, Arika and Witt, Emily and Kane, Robert (2018) The fourth flight of CHESS: spectral resolution enhancements for high-resolution FUV spectroscopy. In: Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray. Proceedings of SPIE. No.10699. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 106990K. ISBN 9781510619517.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


In this proceeding, we describe the scientific motivation and technical development of the Colorado Highresolution Echelle Stellar Spectrograph (CHESS), focusing on the hardware advancements and testing of components for the fourth and final launch of the payload (CHESS-4). CHESS is a far ultraviolet rocket-borne instrument designed to study the atomic-to-molecular transitions within translucent cloud regions in the interstellar medium. CHESS is an objective echelle spectrograph, which uses a mechanically-ruled echelle and a powered (f/12.4) cross-dispersing grating; it is designed to achieve a resolving power R > 100,000 over the band pass λλ 1000–1600 Å. CHESS-4 utilizes a 40 mm-diameter cross-strip anode readout microchannel plate detector, fabricated by Sensor Sciences LLC, to achieve high spatial resolution with high global count rate capabilities (∼ MHz). An error in the fabrication of the cross disperser limited the achievable resolution on previous launches of the payload to R ∼ 4000. To remedy this for CHESS-4, we physically stress the echelle grating, introducing a shallow toroidal curvature to the surface of the optic. Preliminary laboratory measurements of the resulting spectrum show a factor of 4–5 improvement to the resolving power. Results from final efficiency and reflectivity measurements for the optical components of CHESS-4 are presented, along with the pre-flight laboratory spectra and calibration results. CHESS-4 launched on 17 April 2018 aboard NASA/University of Colorado Boulder sounding rocket mission 36.333 UG. We present flight results for the observation of the γ Ara sightline.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
France, Kevin0000-0002-1002-3674
Hoadley, Keri0000-0002-8636-3309
Fleming, Brian0000-0002-2129-0292
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE). The authors would like to thank the students and staff at CU for their tremendous help in seeing CHESS-4 come to fruition. We would also like to thank the NSROC staff at WFF and on Roi-Namur for their tireless efforts that pushed us to a smooth launch. We thank all involved in the alternate CCD payload at JPL and ASU for their efforts. NN would like to thank Sugar Ray for their timeless melodies. This work was supported by NASA grants NNX13AF55G and NNX16AG28G to the University of Colorado.
Funding AgencyGrant Number
Subject Keywords:echelle spectrograph, far-ultraviolet, rocket-borne, astrophysics
Series Name:Proceedings of SPIE
Issue or Number:10699
Record Number:CaltechAUTHORS:20180730-160350447
Persistent URL:
Official Citation:Nicholas Kruczek, Nicholas Nell, Kevin France, Keri Hoadley, Brian Fleming, Stefan Ulrich, Alexander D. Miller, Arika Egan, Emily Witt, Robert Kane, "The fourth flight of CHESS: spectral resolution enhancements for high-resolution FUV spectroscopy", Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106990K (6 July 2018); doi: 10.1117/12.2312877;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88365
Deposited By: Tony Diaz
Deposited On:30 Jul 2018 23:22
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page