Cryo-vacuum testing of the JWST Integrated Science Instrument Module

In late 2015/early 2016, a major cryo-vacuum test was carried out for the Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST). This test comprised the final cryo-certification and calibration test of the ISIM, after its ambient environmental test program (vibration, acoustics, EMI/EMC), and before its delivery for integration with the rest of the JWST observatory. Over the 108-day period of the round-the-clock test program, the full complement of ISIM flight instruments, structure, harness radiator, and electronics were put through a comprehensive program of thermal, optical, electrical, and operational tests. The test verified the health and excellent performance of the instruments and ISIM systems, proving the ISIM element’s readiness for integration with the telescope. We report here on the context, goals, setup, execution, and key results for this critical JWST milestone.

[1]  Bruce Swinyard,et al.  The Mid-Infrared Instrument for JWST, II: Design and Build , 2015, 1508.02333.

[2]  Marcia J. Rieke,et al.  Overview of James Webb Space Telescope and NIRCam's Role , 2005, SPIE Optics + Photonics.

[3]  James W. Beletic,et al.  Commentary: JWST near-infrared detector degradation— finding the problem, fixing the problem, and moving forward , 2012 .

[4]  James R. Fienup,et al.  Wavefront-error performance characterization for the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM) science instruments , 2016, Astronomical Telescopes + Instrumentation.

[5]  Peter Rumler,et al.  The JWST/NIRSpec instrument: update on status and performances , 2016, Astronomical Telescopes + Instrumentation.

[6]  Peter Rumler,et al.  Overview of the near-infrared spectrograph (NIRSpec) instrument on-board the James Webb Space Telescope (JWST) , 2007, SPIE Optical Engineering + Applications.

[7]  Rachel E. Anderson,et al.  The Mid-Infrared Instrument for the James Webb Space Telescope, X: Operations and Data Reduction , 2015, 1512.03000.

[8]  M. Clampin.  Status of the James Webb Space Telescope , 2009 .

[9]  Neil Rowlands,et al.  The JWST Fine Guidance Sensor (FGS) and Near-Infrared Imager and Slitless Spectrograph (NIRISS) , 2012, Other Conferences.

[10]  Stephan M. Birkmann,et al.  The spectral calibration of JWST/NIRSpec: results from the recent cryo-vacuum campaign (ISIM-CV3) , 2016, Astronomical Telescopes + Instrumentation.

[11]  Steve Mann,et al.  Manufacturing and integration status of the JWST OSIM optical simulator , 2010, Astronomical Telescopes + Instrumentation.

[12]  Joseph M. Howard,et al.  Critical science instrument alignment of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM) , 2016, Optical Engineering + Applications.

[13]  George F. Hartig,et al.  JWST’s optical telescope simulator for verification of the Integrated Science Instrument Module , 2016, Optical Engineering + Applications.

[14]  Dean C. Hines,et al.  MIRI/JWST detector characterization , 2016, Astronomical Telescopes + Instrumentation.

[15]  Markus Loose,et al.  Reducing the read noise of HAWAII-2RG detector systems with improved reference sampling and subtraction (IRS2) , 2012, Other Conferences.

[16]  Bruce Swinyard,et al.  The Mid-Infrared Instrument for the James Webb Space Telescope, II: Design and Build , 2015 .

[17]  Neil Rowlands,et al.  Updated cryogenic performance test results for the flight model JWST fine guidance sensor , 2012, Astronomical Telescopes + Instrumentation.

[18]  Neil Rowlands,et al.  35. JWST Fine Guidance Sensor and Near-Infrared Imager and Slitless Spectrograph , 2015 .

[19]  John Krist,et al.  Science opportunities with the near-IR camera (NIRCam) on the James Webb Space Telescope (JWST) , 2012, Other Conferences.

[20]  Peter Rumler,et al.  Getting JWST’s NIRSpec back in shape , 2016, Astronomical Telescopes + Instrumentation.

[21]  Marcia J. Rieke,et al.  Optical testing and verification methods for the James Webb Space Telescope Integrated Science Instrument Module element , 2016, Optical Engineering + Applications.