Fabrication of x-ray spiral masks by laser ablation.

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The manipulation of x-rays by phase structures is becoming more common through devices such as compound refractive lenses, blazed zone-plates and other structures. A spiral phase modulation structure can be used to condition an x-ray beam to produce an x-ray vortex. An x-ray beam in this form can be used as the first step towards a self-collimating beam. Also it can be used as a controllable pathological feature in studies of x-ray phase retrieval. The authors describe the microfabrication of a spiral phase modulation structure by excimer laser ablation. A multi-step fabrication using 15 separate chrome-on-quartz mask patterns is used ... continued below

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Peele, A. G.; Nugent, K. A.; McMahon, P. J.; Paterson, D.; Tran, C. Q.; Mancuso, A. et al. July 2, 2002.

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The manipulation of x-rays by phase structures is becoming more common through devices such as compound refractive lenses, blazed zone-plates and other structures. A spiral phase modulation structure can be used to condition an x-ray beam to produce an x-ray vortex. An x-ray beam in this form can be used as the first step towards a self-collimating beam. Also it can be used as a controllable pathological feature in studies of x-ray phase retrieval. The authors describe the microfabrication of a spiral phase modulation structure by excimer laser ablation. A multi-step fabrication using 15 separate chrome-on-quartz mask patterns is used to create a 16 step spiral staircase structure approximating the desired spiral ramp. The results of simulations and initial experimental results are presented.

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  • SPIE Annual Meeting 2002, Seattle, WA (US), 07/07/2002--07/11/2002

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  • Report No.: ANL/XFD/CP-108109
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 799812
  • Archival Resource Key: ark:/67531/metadc741754

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  • July 2, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • March 21, 2016, 4:08 p.m.

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Peele, A. G.; Nugent, K. A.; McMahon, P. J.; Paterson, D.; Tran, C. Q.; Mancuso, A. et al. Fabrication of x-ray spiral masks by laser ablation., article, July 2, 2002; Illinois. (digital.library.unt.edu/ark:/67531/metadc741754/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.