| Content Provider |
IEEE Xplore Digital Library |
| Author |
Malone, R.M. Baker, S.A. Brown, K.K. Curtis, A.H. Esquibel, D.L. Frayer, D.K. Frogget, B.C. Kaufman, M.I. Smith, A.S. Tibbitts, A. Garten, J.R. Howe, R.A. Huerta, J.A. McGillivray, K.D. Droemer, D.W. Lutz, S.S. Haines, T.J. King, N.S.P. |
| Copyright Year |
2013 |
| Description |
Author affiliation: Los Alamos Nat. Lab., Los Alamos, NM, USA (Haines, T.J.; King, N.S.P.) || Special Technol. Lab., Nat. Security Technol., LLC, Santa Barbara, CA, USA (Lutz, S.S.) || Albuquerque Oper., Nat. Security Technol., LLC, Albuquerque, NM, USA (Droemer, D.W.) || Las Vegas Oper., Nat. Security Technol., LLC, Las Vegas, NV, USA (Garten, J.R.; Howe, R.A.; Huerta, J.A.; McGillivray, K.D.) || Los Alamos Oper., Nat. Security Technol., LLC, Los Alamos, NM, USA (Malone, R.M.; Baker, S.A.; Brown, K.K.; Curtis, A.H.; Esquibel, D.L.; Frayer, D.K.; Frogget, B.C.; Kaufman, M.I.; Smith, A.S.; Tibbitts, A.) |
| Abstract |
Summary form only given. Cygnus is a high-energy radiographic x-ray source. Three large zoom lenses have been assembled to collect images from large scintillators. A large elliptical pellicle (394 × 280 mm) deflects the scintillator light out of the x-ray path into an eleven-element zoom lens coupled to a CCD camera. The zoom lens and CCD must be as close as possible to the scintillator to maximize light collection. A telecentric lens design minimizes image blur from a volume source. To maximize the resolution of objects of different sizes, the scintillator and zoom lens are translated along the x-ray axis, and the zoom lens magnification changes. Zoom magnification is also changed when different-sized recording cameras are used (50 or 62 mm square format). The LYSO scintillator measures 200 × 200 mm and is 5 mm thick. The scintillator produces blue light peaking at 435 nm, so special lens materials are required. By swapping out one doublet and allowing all other lenses to be repositioned, the zoom lens can also use a CsI(Tl) scintillator that produces green light centered at 540 nm. All lenses have an anti-reflective coating for both wavelength bands. Two sets of doublets, the stop, the scintillator, and the CCD camera move during zoom operations. One doublet has x-y compensation. Each zoom lens uses 60 lb of glass inside the 340 lb mechanical structure and can be used in either vertical or horizontal orientation. This work was done by National Security Technologies, LLC, under Contract No. DE-AC52-06NA25946 with the U.S. Department of Energy. |
| Starting Page |
1 |
| Ending Page |
1 |
| File Size |
114739 |
| Page Count |
1 |
| File Format |
PDF |
| ISBN |
9781467351713 |
| ISSN |
07309244 |
| DOI |
10.1109/PLASMA.2013.6633437 |
| Language |
English |
| Publisher |
Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date |
2013-06-16 |
| Publisher Place |
USA |
| Access Restriction |
Subscribed |
| Rights Holder |
Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword |
Lenses National security X-ray imaging Charge coupled devices Cameras Laboratories Radiography |
| Content Type |
Text |
| Resource Type |
Article |
| Subject |
Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
