EMIR Detectors

The EMIR consortium has decided to use a 2048x2048 Rockwell Hawaii-2 detector. It has already been received at Instituto de Astrofísica de Canarias (October 2000). It can be seen in the following picture.

Hawaii-2 Rockwell detector

This kind of detector is the largest HgCdTe infrared focal plane array in the world. With a pixel pitch of 18 microns and a format of 2048 x 2048, the total array measures just less than 40mm x 40mm. The HAWAII-2 multiplexer has slightly changed from that of the HAWAII with 3 output modes, finer control of the clocking to improve self- emission "Glow", and circuitry to reduce crosstalk.

Its main characteristics can be summarized in the following table:

Parameter Measured Values Units
Detector Interface Circuit SFD -
Cell Pitch 18 µm
Die Size <40 mm2
Integration Capacity 1.0x105 carriers
Integration Capacitance 18-35 fF
Signal Conversion Gain 3.4-6.8 V/e-
Output Signal Excursion 0.4-1 V
Minimum Read Noise <10 e-
Dynamic Range up to 104 V/V
Maximum Data Rate <1 MHz
Maximum Slew Rate 400 nsec
Peak D* @ min Qb >1x1014 Jones
Power Dissipation ≤2 mW

In the following picture, you can see the comparison between a NICMOS-3 array (left) and EMIR Rockwell Hawaii-2 detector (right).

NICMOS-3 array (left) vs. Hawaii-2 Rockwell detector (right)

For more information, please visit the official Rockwell Hawaii-2 Homepage.

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