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: (click for a larger view) 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 .4-1  V  Minimum Read Noise <10  e-  Dynamic Range up to 10 4 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). (click for a larger view) For more information, please visit the official Rockwell Hawaii-2 Homepage.