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Title: Assembly and testing of a large zoom lens for proton radiography

Abstract

A zoom lens has been designed for proton radiography applications. Radiographic images are recorded at the end of an accelerator, where protons exit an aluminum vacuum window, producing a shadowgraph image onto an LYSO (lutetium yttrium orthosilicate) scintillator. Emission from this 5-inch-square scintillator reflects off a pellicle and is then collected by a zoom lens located 24 inches away. Proton radiography can make high-speed, multi-frame radiographs or radiographic movies. This zoom lens provides 2X magnification for viewing different object sizes. The zoom lens incorporates eleven lenses, including a moving doublet that changes the magnification. Refocus of the camera is required when zooming. Only one moving doublet lens is required to change magnification. The stop was anchored to the moving doublet, and its diameter is unchanged throughout magnification changes. The entire lens system is housed in a cylindrical tube. This lens will be used with a 10-frame camera with a 44 × 44 mm square image format and 1100 × 1100 pixel resolution. Suppressing stray light is very important in this lens system. Radial compensation is controlled by two locking micrometers on element 9, which relaxes the mechanical tolerancing. A helical cam barrel using a linear rail controls the movement ofmore » the doublet. Alignment of the mechanical gears will be discussed.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Nevada National Security Site, Mission Support and Test Services LLC
Publication Date:
Research Org.:
Nevada National Security Site (NNSS), North Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
OSTI Identifier:
1499704
Report Number(s):
DOE/NV/03624-0228
Journal ID: 1074704
DOE Contract Number:  
DE-NA0003624
Resource Type:
Conference
Journal Name:
Proceedings Volume 10747, Optical System Alignment, Tolerancing, and Verification
Additional Journal Information:
Journal Volume: 10747; Journal Issue: XII; Conference: SPIE Optical Engineering + Applications, August 19 - 23, 2018, San Diego, California
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; zoom lens, proton radiography, optical alignment, optical tolerance

Citation Formats

Malone, Robert, Clayton, Daniel, Frayer, Daniel, Kaufman, Morris, and McGillivray, Kevin. Assembly and testing of a large zoom lens for proton radiography. United States: N. p., 2018. Web. doi:10.1117/12.2324289.
Malone, Robert, Clayton, Daniel, Frayer, Daniel, Kaufman, Morris, & McGillivray, Kevin. Assembly and testing of a large zoom lens for proton radiography. United States. https://doi.org/10.1117/12.2324289
Malone, Robert, Clayton, Daniel, Frayer, Daniel, Kaufman, Morris, and McGillivray, Kevin. 2018. "Assembly and testing of a large zoom lens for proton radiography". United States. https://doi.org/10.1117/12.2324289. https://www.osti.gov/servlets/purl/1499704.
@article{osti_1499704,
title = {Assembly and testing of a large zoom lens for proton radiography},
author = {Malone, Robert and Clayton, Daniel and Frayer, Daniel and Kaufman, Morris and McGillivray, Kevin},
abstractNote = {A zoom lens has been designed for proton radiography applications. Radiographic images are recorded at the end of an accelerator, where protons exit an aluminum vacuum window, producing a shadowgraph image onto an LYSO (lutetium yttrium orthosilicate) scintillator. Emission from this 5-inch-square scintillator reflects off a pellicle and is then collected by a zoom lens located 24 inches away. Proton radiography can make high-speed, multi-frame radiographs or radiographic movies. This zoom lens provides 2X magnification for viewing different object sizes. The zoom lens incorporates eleven lenses, including a moving doublet that changes the magnification. Refocus of the camera is required when zooming. Only one moving doublet lens is required to change magnification. The stop was anchored to the moving doublet, and its diameter is unchanged throughout magnification changes. The entire lens system is housed in a cylindrical tube. This lens will be used with a 10-frame camera with a 44 × 44 mm square image format and 1100 × 1100 pixel resolution. Suppressing stray light is very important in this lens system. Radial compensation is controlled by two locking micrometers on element 9, which relaxes the mechanical tolerancing. A helical cam barrel using a linear rail controls the movement of the doublet. Alignment of the mechanical gears will be discussed.},
doi = {10.1117/12.2324289},
url = {https://www.osti.gov/biblio/1499704}, journal = {Proceedings Volume 10747, Optical System Alignment, Tolerancing, and Verification},
number = XII,
volume = 10747,
place = {United States},
year = {2018},
month = {9}
}

Conference:
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Works referenced in this record:

Paraxial analysis of double-sided telecentric zoom lenses with four components
journal, November 2014


An 800-MeV proton radiography facility for dynamic experiments
journal, November 1999

  • King, N. S. P.; Ables, E.; Adams, Ken
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WITHDRAWN: Ultra-high speed burst-mode imager for multi-frame radiography
journal, November 2010

  • Kwiatkowski, Kris; Nedrow, Paul; Douence, Vincent
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