1. The ACIS Instrument Gordon P. Garmire Evan Pugh Professor ACIS IPI The Pennsylvania State University

2. 2005 October 11Chandra Fellows Symposium21 Original Co-Investigators –Hale Bradt –David Burrows –Claude Canizares –George Clark –Stewart Collins –Eric Feigelson –Jeffery McClintock –James Morrison –John Nousek –Saul Rappaport -- George Ricker –Guenter Reigler –Richard Sherman –Wallace Sargent –Daniel Weedman

3. 2005 October 11Chandra Fellows Symposium31 The ACIS Team during the construction phase

4. 2005 October 11Chandra Fellows Symposium41 Timeline of ACIS 1978 first X-rays on a WFPC Chip 1984 Proposal for ACIS submitted 1985 NASA Selects ACIS 1985 Select MIT over JPL for management 1988 Drop TI as CCD source, go to LL 1988 ASTRO-D (ASCA) test bed for LL CCDs 1988 Review before Phase C/D contract 1989 Slow start, 1990 Settled on LL CCD design 1992 Descope to high orbit and 4 mirrors, 2 FP instruments. 1994 Final CCD design and flight unit production starts 1995 Crisis on schedule, William Mayer takes over as Project Manager, MIT goes into crisis mode. 1995 Decide to use 2 chip for initial calibration 1996 Only two BI chips good, use on S3, S1 1996 Cracks in filters, change to polyimide and recalibrate 1996 Flexprint failures, need to fix CCDs on flight paddles 1997 Contamination on CCDs in cal at MIT PSU microprobe shows low Na and K 1997 Calibration of 2C and flight unit 1997 Vac test of full instrument on SIM 1998 Full test of S/C TV at TRW, ACIS door fails to open 1998 Design safety for door opening 1999 All door tests look good, no test in STS before deploy 1999 Launched

5. 2005 October 11Chandra Fellows Symposium51 AXAF Launch sequence

6. 2005 October 11Chandra Fellows Symposium61 The original ACIS instrument

7. 2005 October 11Chandra Fellows Symposium71 The final configuration

8. 2005 October 11Chandra Fellows Symposium81

9. 2005 October 11Chandra Fellows Symposium91 The Full ACIS Instrumennt

10. 2005 October 11Chandra Fellows Symposium101 The ACIS Vacuum Door

11. 2005 October 11Chandra Fellows Symposium111 ACIS Venting Assembly

12. 2005 October 11Chandra Fellows Symposium121

13. 2005 October 11Chandra Fellows Symposium131 The oxygen-rich SNR G292.0+1.8 Peter Romig, David Burrows, Sangwook Park, Jack Hughes and Pat Slane

14. 2005 October 11Chandra Fellows Symposium141 The mysterious central object in RCW103

15. 2005 October 11Chandra Fellows Symposium151 The Crab nebula and Pulsar Koji Mori and David Burrows

16. 2005 October 11Chandra Fellows Symposium161 The 1 Ms Orion Region

17. 2005 October 11Chandra Fellows Symposium171 The 2 Ms CDF-N