FPGA based Detector Control

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FPGA based Detector Control Data Handling
Systems for Optical Astronomy

• Mahesh Burse.
• IUCAA, Pune, INDIA

13-10-2011
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Reflecting Telescopes
It is much easier to make a large mirror, because
one can support it from behind. All large
telescopes are reflectors. The largest being
10-metre in diameter.

• One can take the light to various foci, some
• of which are better for placing heavy
• instruments.
• One generally has a secondary mirror to
• take the light to the focus.
• Solid state detectors for visible, Near IR and
  Near UV

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Megacam Mosaic of 40 CCDsEach CCD is 2k x 4k

• Click to edit Master text styles
• Second level
• Third level
• Fourth level
• Fifth level

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IGO Detector Control System for Vis / IR imaging
Analog Switches DACs for BIAS and CLOCK
Generation
FEEDTHROUGH CARD
SHUTTER CONTROL TEMPERATURE
Detector (2K x 2K) EEV /LORAL / PICNIC
FIBER OPTIC LINK to Data Acquisition System
Spartan-II Read-Out Clock Generator
CDS ADC1 ADC2 ADC3 ADC4
Spartan-II Communication Card with
FIBER INTERFACE
200 Mbps Transreceiver Hotlink
MICROCONTROLLER BASED TELEMETRY
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IGO - USB Data Acquisition Board

• General Purpose Data Acquisition System, Hot
  pluggable
• No add-on card and special purpose driver
  required (use libusb)
• USB 2.0 Bulk Mode, 40 MB/sec sustained data rate
• Easily portable, one can use even with laptop
• Next step is to switch to USB 3.0 (5 Gbps)

Xilinx Spartan-II FPGA
JTAG
USB 2.0 HOST P.C
EZ-USB USB Peripheral controller
16 bit I/O
Serial EEPROM
control
Hotlink / Taxi Cy7C9689
Fiber Transceiver
Fiber (serial) interface
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IGO - CCD CAMERA FEATURES
GUI for image acquisition / creation On chip
binning Analog CDS Simple text file based system
for changing DAC voltages and ROI readout
clocks Fast readout mode for focusing, etc Only
3-4 electrons readout noise
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CCD Controller setup in the Lab
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IGO - CCD Data Acquisition Board

• Click to edit Master text styles
• Second level
• Third level
• Fourth level
• Fifth level

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CMOS hybrid detector
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SIDECAR ASIC Controller on a chip
SIDECAR - System for Image Digitization,
Enhancement, Control And Retrieval
Replace this with
This
Cryogenic 36 Analog channels with 16 bit 500 KHz
and 12 bit/ 10 MHz ADC, 16 bit Microcontroller
for clock generation and signal processing lt 100
mW at 100KHz, 32 channel operation
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SIDECAR ASIC BLOCK DIAGRAM
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Teledyne solution for SIDECAR ASIC
Needs Teledyne supplied HAL which interfaces with
a third party USB driver and exposes a COM DLL
interface using the Microsoft .NET service JADE2
is far too complex to be of use Not suitable for
an observatory MOSFIRE DDR Report Proc. of SPIE
Vol. 7014 70146M-9 ,
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IUCAA SIDECAR DRIVE ELECTRONICS CARD
ISDECComplete package tuned to observatory
requirements
Fast USB 2.0 interface (with external copper to
fiber converters) Built around Xilinx
Spartan-IIIE supports CMOS and LVDS On board
NAND memory (2 GB) Platform independent software
tested on different flavors of Linux and
Windows Fully compatible with Teledyne supplied
HxRG firmware Multiple state machines to support
different modes Serial I/F for configuration and
programming and 16 bit parallel interface for
science data read On chip FIFO design using BLOCK
RAM Effective use of PLL and DCM to support wide
range of operation (pixel clocks from 50 KHz to
500 KHz).
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ISDEC- IUCAA SIDECAR DRIVE ELECTRONICS CARD
Works at -40 deg C.
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IFPAC IUCAA FOCAL PLANE ARRAY CONTROLLER (under
development)
Idea is to design a controller which can handle
any known detector as of today
(CCD,IR,EMCCD,SIDECAR,DDCCD,OTCCD,etc) On chip
algorithm generates the readout clocks based on
the preloaded detector specs Fully configurable
hardware to support many possibilities of array
configurations Simultaneous data readout possible
for Vis. and IR band Use the time gaps between
Lines and Frames for other operations
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IFPAC Virtex-5 main Controller as ISDEC

• Click to edit Master text styles
• Second level
• Third level
• Fourth level
• Fifth level

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IFPAC- 8 Ch. Analog Board

• Click to edit Master text styles
• Second level
• Third level
• Fourth level
• Fifth level

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Readout Clock Generator

• Click to edit Master text styles
• Second level
• Third level
• Fourth level
• Fifth level

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ISDEC and IFPAC
University of Wisconsin, USA - South African
Large Telescope (RSS-NIR) University of Florida,
USA - Gran Telescopio CANARIAS (GTC), Canary
InfraRed Camera Experiment (CIRCE) Caltech, USA
- Thirty Meter Telescope ,On-Instrument
wavefront sensor (OIWFS) TIFR-NCRA IRSIS
InfraRed spectroscopic imaging survey. (Fiber fed
space based telescope and spectrograph,which will
use multiple HAWAII detectors.
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Applications
Adaptive Optics calculate in real time waveform
distortions and actuator drive voltages for the
deformable mirror for wavefront restoration.
Digital CDS (DSP) Image processing and data
reduction in projects like Large Synoptic Survey
Telescope (LSST), A large aperture , wide field
survey telescope and 3200 Megapixel camera to
image faint objects across the sky.
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THANK YOU
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