1

STA Solutions for ELTs

Detector Workshop for ELTs Pasadena, CA

October 23 2015

Richard Bredthauer, Kasey Boggs, Greg Bredthauer Semiconductor Technology Associates, Inc.

27122 Paseo Espada, Suite 1004 San Juan Capistrano, CA 92675

(949) 481-1595 | greg.bredthauer@sta-inc.net

2

Introduction

•  Standard and custom CCDs •  Archon controller •  Recent systems •  Current developments

3

STA1600

•  Full 6” wafer imager •  10560 x 10560 pixels •  9 micron pixel •  111,513,600 pixels per frame •  16 outputs •  Designed for US Naval Observatory

URAT

4

STA4150 and STA3600

•  STA4150, 4k x 4k 15µm •  VIRUS, 2k x 2k 15µm

5

Custom CCDs

•  STA3400: WIYN/ODI OTA •  STA3800/STA4400: LSST Science and Guider •  STA3900: Lockheed GLM •  STA4100: NASA ORCA

6 Fig 2. Pixel pitch across the surface of the earth.

20x30 20x28 20x26 20x2420x2820x2620x24

20x30 20x28 20x26 20x2420x2820x2620x24

22x30 22x28 22x26 22x2422x2822x2622x24

22x30 22x28 22x26 22x2422x2822x2622x24

24x30 24x28 24x26 24x2424x2824x2624x24

24x30 24x28 24x26 24x2424x2824x2624x24

26x30 26x28 26x26 26x2426x2826x2626x24

26x30 26x28 26x26 26x2426x2826x2626x24

28x30 28x28 28x26 28x2428x2828x2628x24

28x30 28x28 28x26 28x2428x2828x2628x24

30x30 30x28 30x26 30x2430x2830x2630x24

Archon

•  12 slot modular controller, 20 kHz – 3 MHz •  Copper or fiber gigabit ethernet TCP/IP interface •  Up to 16 input channels, 16-bit 100 MHz ADCs,

AC-coupled, 32-bit digital CDS •  8 channel clock driver modules, 14-bit

100 MHz DACs, arbitrary waveform, programmable slew

•  6/24 channel DC bias modules, 16-bit DACs, voltage/current monitoring, programmable current limit

7

CCD Output

8

ATLAS

•  STA1600 BI CCD, TE Cooled •  Archon controller •  Custom module:

8 RTDs, 3 Picomotors, 3 Hall sensors, 3 LEDs, TEC, ion pump, vacuum gauge

9

NASA Ocean Radiometer for Carbon Assessment

(ORCA) •  STA4100 CCD – 512 x 128 TDI,

26 um pixels •  Reflex Controller •  8 Outputs at 20 MHz •  Rotating telescope at 6 Hz,

33640 lines per revolution, 200 kHz line rate

•  2.5 uV / e-, 800 ke- full well

10

ZTF

•  16 6k x 6k science CCDs, 4 outputs each, plus guiders

•  Using 5 Archon controllers (4 science, 1 guider) •  Archon upgraded to use

daisy chain synchronization, yielding stable, repeatable static offsets of 15 ns plus cable length between each controller

11

ZTF Test Results

12

Current Developments

STA4500: 6120 x 6120 15um x 15um MPP •  4 outputs (3 e- at 100kHz, 5-6 e- at 1MHz) •  3 phase horizontal and vertical registers •  Dual vertical accumulation

gates to hide transfer time •  Dump gate •  First silicon in 3 months

13

LSST PRNU

•  Regular PRNU patterns at ~1% seen on STA3800 •  1X masks à No stepper pattern? •  Changed critical masks to a higher resolution mask writer

14

Thanks!

15