Channel Guided Standard LWFA (CGSL) Project

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During the project we have demonstrated control of several important parameters of capillary channels. We achieved the required profiles for guiding, we have demonstrated channels in density range between 10{sup 17}-10{sup 19}cm{sup -3} in both short and long capillaries. The plasma temperature and density profiles were measured in both radial and longitudinal directions. The Boron Nitride capillary has provided a guiding medium that can withstand more than 1000 shots. The laser ignition of capillary discharge provided reliable almost jitter free approach. Both laser and experimental set up were upgraded. The laser system upgrade included development of a 10 TW Ti-sapphire ... continued below

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44 p.

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Hafizi, B. & Zigler, A. March 4, 2006.

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Description

During the project we have demonstrated control of several important parameters of capillary channels. We achieved the required profiles for guiding, we have demonstrated channels in density range between 10{sup 17}-10{sup 19}cm{sup -3} in both short and long capillaries. The plasma temperature and density profiles were measured in both radial and longitudinal directions. The Boron Nitride capillary has provided a guiding medium that can withstand more than 1000 shots. The laser ignition of capillary discharge provided reliable almost jitter free approach. Both laser and experimental set up were upgraded. The laser system upgrade included development of a 10 TW Ti-sapphire laser facility that will be used for acceleration experiments instead T cube. We have conducted high intensity (above 10{sup 17}W/cm{sup 2}) guiding experiments through various capillaries. The concerns related to influence of relatively high current density flow through capillary on the injected electrons were studied extensively by us both theoretically and experimentally using a simple injection method. The method is based on the interaction of a high intensity laser pulse with a thin wire placed near capillary entrance. The influence of magnetic fields was found to be insignificant. Using this method we have studied transport of electrons though capillary discharge. We have simulated beam injection into a channel guided LWFA and found that under certain conditions the injected electron distribution can be very broad. Finally, prior to the staging of the capillary based accelerators, we performed a proof-of-principal experiment on staged optical injection and laser wakefield acceleration using two different short laser pulses focused into two spatially separated gas jets.

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44 p.

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  • Report No.: Final Report II
  • Grant Number: FG02-02ER83461
  • DOI: 10.2172/877174 | External Link
  • Office of Scientific & Technical Information Report Number: 877174
  • Archival Resource Key: ark:/67531/metadc875402

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • March 4, 2006

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 4, 2016, 3:15 p.m.

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Hafizi, B. & Zigler, A. Channel Guided Standard LWFA (CGSL) Project, report, March 4, 2006; United States. (digital.library.unt.edu/ark:/67531/metadc875402/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.