aas 201 - don figer january 9, 2003 the jwst detector characterization project in the independent...

AAS 201 - Don Figer January 9, 2003

The JWST Detector Characterization Project

in the Independent Detector Testing Laboratory

Don Figer, STScI/JHUJanuary 9, 2003

AAS 201Seattle, WA

AAS 201 - Don Figer January 9, 2003

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

1.E+02

0.1 1 10

Wavelength [m]

Sig

na

l [e

-/s

ec

/pix

]

Zodiacal Light

Sunshield

JWST requirement

JWST goal

R=5

R=1000

0

1

2

3

4

2 4 6 8

Read noise per exposure [electrons]

Du

rati

on

of

DR

M N

IR O

bs

erv

ati

on

s [

yrs

]

Images

Spectra

Dark current =

0.126 e /sec

0.020 e /sec

0.003 e /sec

Detectors Are Important for JWST

AAS 201 - Don Figer January 9, 2003

JWST NIR Detector Requirements

AAS 201 - Don Figer January 9, 2003

IDTL Role inJWST Detector Program

AAS 201 - Don Figer January 9, 2003

Past and present personnel

Eddie BergeronData Analyst

Mike TelewiczIntern

Gretchen GreeneMechanical Engineer

Monica RiveraIntern

Russ PeltonTechnician

Tom ReevesLab Technician

Bernie RauscherProject Scientist

Steve McCandlissJHU Lead

Scott FelsIntern

Sito BallezaSystems Engineer

Robert BarkhouserOptical Engineer

Utkarsh SharmaGraduate Student

Ernie MorseData Analyst

Don FigerDirector

Mike ReganSystem Scientist

AAS 201 - Don Figer January 9, 2003

IDTL Test System

Controller Electronics

Vacuum Hose

He Lines

EntranceWindow

Dewar

AAS 201 - Don Figer January 9, 2003

Hawaii 1R with 5.0 mu Cutoff

AAS 201 - Don Figer January 9, 2003

Rockwell & Raytheon 2K Devices

AAS 201 - Don Figer January 9, 2003

IDTL Measurements: Dark Current

Lowest measured dark current is ~0.006 e/s/pixel.

AAS 201 - Don Figer January 9, 2003

Read noise is ~10 e for large number of reads. (system read noise is ~2.5 e)

IDTL Measurements: Read Noise

AAS 201 - Don Figer January 9, 2003

IDTL Measurements: Gain

AAS 201 - Don Figer January 9, 2003

Hawaii 1R with 5 um Cutoff

AAS 201 - Don Figer January 9, 2003

IDTL Test System

AAS 201 - Don Figer January 9, 2003

QE measurements have an accuracy of ~10%.

IDTL Measurements: AQE

AAS 201 - Don Figer January 9, 2003

Relative QE maps show significant variations across field

IDTL Measurements: RQE