Rapid Acquisition Imaging Spectrograph (RAISE) Renewal Proposal Project

Metadata Updated: July 17, 2020

[HTML_REMOVED]p[HTML_REMOVED] The optical design of RAISE is based on a new class of UV/EUV imaging spectrometers that use[HTML_REMOVED]nbsp; only two reflections to provide quasi-stigmatic performance simultaneously over multiple wavelengths[HTML_REMOVED]nbsp; and spatial fields. Figure 5 summarizes the RAISE instrument design, showing photographs of each of[HTML_REMOVED]nbsp; the components or subsystems. The design uses an off-axis parabolic telescope mirror to form a real[HTML_REMOVED]nbsp; image of the sun on the spectrometer entrance aperture. A slit then selects a portion of the solar image,[HTML_REMOVED]nbsp; passing its light onto a near-normal incidence toroidal grating, which re-images the spectrally dispersed[HTML_REMOVED]nbsp; radiation onto two array detectors. Two full spectral passbands over the same one-dimensional spatial[HTML_REMOVED]nbsp; field are recorded simultaneously with no scanning of the detectors or grating. The two different spectral[HTML_REMOVED]nbsp; bands (1st-order 1205-1243[HTML_REMOVED]Aring; and 1526-1564[HTML_REMOVED]Aring;) are imaged onto two intensified Active Pixel Sensor[HTML_REMOVED]nbsp; (APS) detectors whose focal planes are individually adjusted for optimized performance. The telescope[HTML_REMOVED]nbsp; and grating are coated with B4C to enhance short wavelength (2nd order) reflectance (Fig. 6), enabling the[HTML_REMOVED]nbsp; instrument to record the brightest lines between 602-622[HTML_REMOVED]Aring; and 761-780[HTML_REMOVED]Aring; at the same time. Table 1[HTML_REMOVED]nbsp; summarizes the main optical parameters for RAISE. [HTML_REMOVED]nbsp;[HTML_REMOVED]nbsp;[HTML_REMOVED]/p[HTML_REMOVED] [HTML_REMOVED]p[HTML_REMOVED] [HTML_REMOVED]strong[HTML_REMOVED]TVLS Grating. [HTML_REMOVED]/strong[HTML_REMOVED]The single toroidal variable line space (TVLS) grating has a toroidal surface[HTML_REMOVED]nbsp; (Sagittal Radius = 640.5 mm, Tangential Radius = 635.3 mm), with varied line space (VLS) rulings of the[HTML_REMOVED]nbsp; type developed originally for spherical substrates by Kita, Harada, and collaborators (1983, 1995). By[HTML_REMOVED]nbsp; combining this VLS concept with toroidal surfaces, RAISE is the first to exploit this new class of[HTML_REMOVED]nbsp; spectrometers, as described by Thomas (2003). For RAISE, the grating is placed 400 mm behind the slit,[HTML_REMOVED]nbsp; with focus at a distance of approximately 1700 mm, for a spectrometer magnification of 4.25. By[HTML_REMOVED]nbsp; operating at high magnification, the RAISE spectrometer most effectively utilizes the full length and[HTML_REMOVED]nbsp; width available in the sounding rocket payload. The first RAISE grating, mechanically ruled by Bach[HTML_REMOVED]nbsp; Research, Inc., was delivered in August 2007 and tested for figure, ruling density and total grating[HTML_REMOVED]nbsp; efficiency.[HTML_REMOVED]nbsp;[HTML_REMOVED]/p[HTML_REMOVED] [HTML_REMOVED]p[HTML_REMOVED] [HTML_REMOVED]strong[HTML_REMOVED]Intensified APS Cameras[HTML_REMOVED]/strong[HTML_REMOVED]. The RAISE Intensified APS camera systems are 1k x 1k CMOS Active[HTML_REMOVED]nbsp; Pixel Sensors using miniature digital camera electronics and fed by an MCP intensifier. APS cameras[HTML_REMOVED]nbsp; were chosen for RAISE (rather than CCDs) because of their extremely fast readout, direct digital output,[HTML_REMOVED]nbsp; low mass, low power, deep full well and high radiation tolerance. The RAISE cameras were developed at[HTML_REMOVED]nbsp; DLR (Germany) using a Cypress/Filfactory Star 1000 APS and include a 12-bit external ADC and USB[HTML_REMOVED]nbsp; 2.0 interface. We will operate the cameras at 5-10 frames/sec readout, making dark current negligible[HTML_REMOVED]nbsp; compared to the incoming signal. The complete camera electronics including its controller is integrated[HTML_REMOVED]nbsp; on only one printed circuit board, and uses a rigid-flex 3D-interconnection between the boards to form a[HTML_REMOVED]nbsp; lightweight, compact sensor head. Flight detectors were delivered by DLR in August 2008.[HTML_REMOVED]nbsp;[HTML_REMOVED]/p[HTML_REMOVED] [HTML_REMOVED]p[HTML_REMOVED] [HTML_REMOVED]strong[HTML_REMOVED][HTML_REMOVED]em[HTML_REMOVED]RAISE Chromospheric Slit Jaw Camera (SJC)[HTML_REMOVED]nbsp; [HTML_REMOVED]/em[HTML_REMOVED][HTML_REMOVED]/strong[HTML_REMOVED]To co-align the RAISE spectra with observations from SDO, HINODE, and IRIS, and to collect[HTML_REMOVED]nbsp; chromospheric disk images in C IV and the continuum between 1500-1700 [HTML_REMOVED]Aring;, the solar image at the[HTML_REMOVED]nbsp; telescope focal plane (spectrograph entrance slit plane) is re-imaged onto a SJC mounted on the bo

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

References

http://techport.nasa.gov/home
http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf
http://techport.nasa.gov/fetchFile?objectId=6561
http://techport.nasa.gov/fetchFile?objectId=3456
http://techport.nasa.gov/fetchFile?objectId=3447
http://techport.nasa.gov/fetchFile?objectId=6584
http://techport.nasa.gov/fetchFile?objectId=6560
http://techport.nasa.gov/fetchFile?objectId=3448

Dates

Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020
Publisher Science Mission Directorate
Unique Identifier TECHPORT_10852
Maintainer
Donald Hassler
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 2dc21e67-2b22-47d3-8800-b7fe187dc60c
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2011-12-01
Homepage URL http://techport.nasa.gov/view/10852
Data Last Modified 2020-01-29
Program Code 026:000
Related Documents http://techport.nasa.gov/home, http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf, http://techport.nasa.gov/fetchFile?objectId=6561, http://techport.nasa.gov/fetchFile?objectId=3456, http://techport.nasa.gov/fetchFile?objectId=3447, http://techport.nasa.gov/fetchFile?objectId=6584, http://techport.nasa.gov/fetchFile?objectId=6560, http://techport.nasa.gov/fetchFile?objectId=3448
Source Datajson Identifier True
Source Hash 53094b15eb279abde0fcf55468ac0af94884e520
Source Schema Version 1.1
Temporal 2011-12-01T00:00:00Z/2014-11-01T00:00:00Z

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