High Throughput Soft X-Ray Filters with Enhanced IR-Rejection

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,926.00
Award Year:
2011
Program:
SBIR
Phase:
Phase I
Contract:
NNX11CE82P
Award Id:
n/a
Agency Tracking Number:
104842
Solicitation Year:
2010
Solicitation Topic Code:
S1.05
Solicitation Number:
n/a
Small Business Information
60 Saltspring Dr., Friday Harbor, WA, 98250-9026
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
067760363
Principal Investigator:
DavidGrove
Principal Investigator
(360) 378-4137
david.grove@luxel.com
Business Contact:
DianneHall
Business Official
(360) 378-4137
dianne.hall@luxel.com
Research Institute:
Stub




Abstract
To fully realize the advances NASA has made in x-ray microcalorimeter detectors, x-ray filters with enhanced out-of-band performance are needed. Blocking filters are essential components in these cryogenic detectors to minimize thermal load while admitting the soft x-rays of interest. Theoretically, an aluminum coating 15-20 nm thick, on each filter in the stack will provide the necessary IR attenuation. In practice, coatings this thin are less optically dense than predicted, and thickness must be nearly doubled to achieve sufficient thermal blocking. This degrades performance. The proposed innovation is to improve the thin aluminum blocking layer to increase its optical density and thermal rejection performance. Preliminary work suggests it is possible to increase the visible and IR light rejection of aluminized polyimide by a factor of 3 or more. In Phase 1, test samples will be made through altered processes. Film microstructural changes, x-ray, IR, and visible light transmission will be measured to identify process parameters that enhance IR blocking. Once optimized, coatings will provide equivalent IR blocking with thinner layers, enhancing mission throughput for the sounding rockets XQC and Micro-X in the near term and provide needed technology enhancements to make possible future missions such as IXO.

* information listed above is at the time of submission.

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