1. Camera Systems Overview
HMI00445
Camera Systems Overview
Jake Wolfson
HMI & AIA Technical Advisor

2. CCD Camera Systems - Background
Immediately after the instruments were under contract for SDO (October 2003) it was determined that HMI and AIA would collaborate on developing a common CCD and CCD Camera.
Both experiments had planned to obtain the camera systems, including CCDs, from Co-Investigators in the UK with no exchange of funds. e2v and RAL (Rutherford Appleton Laboratory) were the groups who would provide the CCDs and camera electronics respectively.
After the UK Co-Investigators were unable to obtain UK funding, it was decided that the US teams would purchase the CCDs and Camera Electronics directly from e2v and RAL.
A Working Group was formed that included personnel from both teams, GSFC, RAL, and e2v.
Weekly telecons have been conducted
The change of AIA from being part of the NRL SHARP investigation to being an investigation by LMSAL has made no fundamental change in the programs at e2v and RAL.
Representatives of both suppliers will present at this PDR - and this will suffice for what would be a similar presentation at the AIA PDR

3. Top-level Features of the Camera Systems
4096 x 4096 pixel CCDs
12 micron pixels
>150,000 electrons full well
High speed and low noise – see following talks
8 Mpixels per second via 4 ports reading out simultaneously at 2 Mpixels/sec each
An independent set of camera electronics for each CCD.
SMCSlite interface between the camera electronics and the HMI Electronics Box
Potential radiation hardness concern
HMI uses front illuminated CCDs
AIA uses back illuminated (thinned) CCDs
Requires some additional processing steps

4. Key Past and Near-term Activities
Peer Reviews held at e2v and RAL in July 2003
Attendees included GSFC personnel
LMSAL-RAL working session held at RAL in late September
3 members of the LMSAL team went to RAL
RAL-e2v-LMSAL working session at LMSAL on 20 November
Development model camera (with demonstration model CCD) to be functional in Spring 2004.