Subject: Imaging Approaches for the IR Demo

Attendees: Benson, Denard, Piot, Krafft, Legg, Neil(scribe)

The list of applications requiring imaging for the IR Demo were reviewed. No new applications were identified.

It was agreed that for OTRs in most cases a standard CCD would be used. There was discussion on the radiation sensitivity of CCD cameras. There appears to be considerable variation between manufacturers due to unknown design/manufacturing differences. We will just have to test to see which system survives and go with it. CID cameras were mentioned as 10x less sensitive but more rad hard.

Discussions on the use for SLM centered on the need for high sensitivity. It was agreed that near infrared give the highest contrast against blackbody radiation. It appears that any intensified CCD would be able to see the beam at 625 uA. It was decided that in most areas we would attempt to use an inexpensive Russian image intensifier if it could survive radiation environment. It was decided to attempt a test of the system on the front end of CEBA; if possible, including it in the setup before the beam is restarted. Denard took the action to get the unit from Jordan and attempt to install it. Piot agreed to review the emission calculations and verify BB/synchrotron ratio calculations. It was also decided that the system needed at least one high quality gated intensifier and Neil agreed to assemble vendor data and hold another meeting when sufficient new information had been gathered to make it profitable.

The issue of determining the dump face temperature profile was resolved by deciding that a pyroelectric camera already intended for purchase by the optical group would be used. Although not as sensitive (10 C) as the other IR cameras available, it is very robust. It was agreed that viewing the dump face would not be done forever but rather only to verify designs and cross calibrate integrating detectors .

For more sensitive observations in the IR it was recommended that we investigate obtaining a cooled IR camera. The leading candidates are PtSi focal plane arrays which see 1 to 6 microns but exactly what other features are desired remain to be determined. Vendor brochures are still being assembled. The cameras are quite expensive ($ 35k - $ 65k). This will be reviewed in a later meeting. Such a camera could also see SLM emission at very low currents since they can observe the emission peaks.