NIRISS Science Team Meeting Oct 2015 NIRISS Activities in CV3 André Martel

NIRISS Science Team MeetingOct 2015

NIRISS Activities in CV3André Martel


Goals (for NIRISS performance):1. Characterize and verify the performance of all the

modes of NIRISS (including new detector).2. Collect data for reference files (JWST calibration

pipeline, aXe, etc…).

Hardware changes since CV2: new grisms (GR700XD, GR150R), new detector, new wheel motors.

Important dates: Oct 21: ISIM CV3 TRR Closeout Review Oct 26: AFC/SFT and pumpdown

Since CV2: new grisms, detector, wheel motors characterize all modes of NIRISS Detector Collect reference files for JWST calibration pipeline

(update some in commissioning) External stimulus from OTE Simulator (OSIM):

monochromatic and continuum sources, diffuser illumination (flat field)

Low chamber background

Overview


Commanding: OTP (state tables), OSS, CECIL

Illumination sources:1. NIRISS internal lamps (FLAT1, FLAT2, LAMP1, LAMP2)2. OTE Simulator (OSIM):

a. Monochromatic sources (0.64, 1.06, 1.32, 1.55 μm)b. Continuum sources (Tungsten) (1 – 5 μm)c. Flat field lamp/diffuser

Monitor the mechanisms usage (DW, CFM, lamps)

Since CV2: new grisms, detector, wheel motors characterize all modes of NIRISS Detector Collect reference files for JWST calibration pipeline (update

some in commissioning) External stimulus from OTE Simulator (OSIM):

monochromatic and continuum sources, diffuser illumination (flat field)

Low chamber background


NGIN Title

JWST-PROC-026716 ISIM Element Cryo-Vacuum #3 Test

JWST-PROC-027875 OSS Warm Darks Cryo-3 Test

JWST-PROC-026314 OSIM Initial Flux Evaluation

JWST-PROC-016344 SIDECAR ASIC and FPA Tuning

JWST-PROC-026498 ISIM Comprehensive Performance Test Part 1

JWST-PROC-026482 OSIM and SI Checkout

JWST-PROC-026481 ISIM CV3 Optical Baseline Procedure

JWST-PROC-026318 NIRISS Performance Characterization

JWST-PROC-027876 OSS SI Characterization (SIC)

JWST-PROC-027877 Day in the Life (DIL)

JWST-PROC-026483 Final Optical Performance

Also: AFC/SFT procedures

Test Procedures

About 40 test procedures. Most relevant:


CV3 Timeline


Functional Tests (AFC/SFT) (Oct 26)

start cooldown Warm darks (Nov 17-19)

1. OSS visits (NGROUPS=88)2. 80 – 60 K

CV3 Timeline Part 1


Initial Flux Evaluation (Nov 20-22):1. Calibration of the OSIM source fluxes, temperature,

and attenuation, pulse widths and delays, diffuser lamp, etc…. Updates to the Test Planning Tool (TPT).

2. OTP0.2.9.0.NIS, 0.2.9.6.NIS, 0.2.9.8.NIS, 0.2.9.3.NIS, 0.2.9.7.NIS

Reach cold plateau (≈ 37.5K in CV2)

Turn on NIRISS FPA heater with CECIL (Nov 22)

CV3 Timeline Part 1


ASIC tuning (Nov 23-27; Thanksgiving)1. Run 1: NIRCAM (12 hours), NIRISS, G1, G2 (7 hours each)2. Run 2: fine-tuning (same order, shorter)3. Analysis by ComDev4. Quick turnaround (~24-36 hours): parallel analysis, “metrics”

Actions for NIRISS team:1. Update the bad-pixel map.2. Future state tables: - Update SOSS sweet spot pixel (if necessary). - Update the four NRM science pixels (and subarray).

CV3 Timeline Part 1


CPT (Comprehensive Performance Test) (Nov 28-Dec 6)1. NIRISS internal lamp checks and parallel darks and

backgrounds2. OTP commanding (state tables) and CECIL

CV3 Timeline Part 2


OSIM + SI Checkout (Dec 6-19)1. Chamber background checks (OTP0.2.0.2)2. Focus Sweeps: OSIM and CFM (OTP0.5.NR.1, 0.5.NR.2)3. Grisms and NRM Checkout (OTP0.2.4.1.NR) a. copy of some lines of the NIRISS Perf Verification b. Verify/confirm (“first light”) - verify location of SOSS sweet spot pixel - spectral and spatial location of GR700XD traces - pointing/subpixel dithers at the four NRM pixels - tilt of GR700XD and GR150C/R traces - ghosts/stray light in the grisms (glint, GR700XD, etc…) - OSIM source fluxes

CV3 Timeline Part 2


4. Actions for NIRISS team: a. Choose best CFM focus. b. Decide if trace tilt tests must be executed (7.15 and 7.16) c. In state tables of Performance Verification: - update focus (TPT) - update pixel of SOSS sweet spot - update pixels of NRM pixels and subpixel offsets - update fluxes of OSIM sources

CV3 Timeline Part 2


Initial Optical Baseline (Dec 20-21)1. Mostly for trending2. Short OSIM flat field and pupil alignment check (PAR)

Critical Tests (Dec 21-23)1. Includes 7.17 Detector Linearity (after NIRCAM and before

FGS for warm lamps)

Christmas break (Dec 24-26)

CV3 Timeline Part 2


NIRISS Performance Verification (Dec 28-31)1. Majority of NIRISS observations (and mechanism usage).

2. OTP commanding (7.*), e.g., 7.5 NRM Verification, 7.7 GR150C/R Wavelength Calibration, etc…

3. Other ISIM tests for requirements verification (OTP4.3.NR Field-of-View, OTP4.5.NR Rogue Path, etc…)

4. NIRSpec is parallel (OSS)

5. See JWST-STScI-004354 or JWST-RPT-027763

http://www.stsci.edu/~martel/NIRISS_CV3_perfver_martel.pdf

CV3 Timeline Part 2


Transition to warm plateau (≈ 43K) (FPA heater off/on)

OSS + SI Characterization (SIC) (Jan 8-10)1. Exercise OSS scripts for all the NIRISS modes (including

a short CFM sweep); NISRAPID and NIS readouts2. OSIM source on; 31 visits, 67 activities

CV3 Timeline Part 3


NIRISS Darks (Jan 10-11)1. In parallel to MIRI performance tests2. CECIL commanding for full frames and subarrays.

OSS Day-in-the-Life (Jan 13-15)1. NIRISS exposures in F158M + CLEAR only2. 7 visits, 21 exposures (38 integrations, NGROUPS = 6-12)

CV3 Timeline Part 3


Final Optical Performance (Jan 16-17)1. Trending: short OSIM flat field, pupil alignment check2. CFM adjustment for 0g 3. DW at CLEARP + F444W for ambient metrology

Warmup1. Turn off NIRISS, start warmup (Jan 18)2. Open chamber (Feb 6)

CV3 Timeline Part 3


Rapid turnaround and formal documentation in order to:1. Verify requirements.2. Characterize and assess the performance of each mode.3. Update or change the operations.4. Create the final pre-flight set of calibration reference files

for all modes (due 6 months after the completion of CV3).

Note: other analyses by the ISIM team (alignment, trending, etc…)

Post-CV3 Analysis


Will verify and characterize all the modes of NIRISS and collect all necessary data for launch.

OTP number of exposures: > 850 (all of CV2: ~1230) OTP number of integrations: > 4830 (all of CV2: ~10900)

Mechanism usage (current tests; no repeats; OSS separate)1. Test Planning Tool: 85% (PW) and 75% (FW) of allocation2. Worst-case scenario: 145% (PW) and 135% (FW)

Web site with CSV of state tables, OSS visits, etc…: http://www.stsci.edu/~martel/CV3

Summary


Orientation (Oct 16): Shared Files / Entire JWST Project / ISIM / Reviews / ISIM CV3 Orientation /ISIM CV3 Orientation (10-14-15_CV3_Training.pptx)

https://ngin.jwst.nasa.gov/Sharefile/Sharefileview.asp?ID=21558

TRR on NGIN: Root / Entire JWST Project / ISIM / Reviews / ISIM CV3 TRR / Final Charts & Final Backup

Optics pre-TRR on NGIN: Root / Entire JWST Project / ISIM Optics / CV3 optics pre-TRR 17 Sep 2015

Material



Documents

NIRISS Science Team Meeting Oct 2015 NIRISS Activities in CV3 André Martel