학술논문
Development of a hardened THz energy meter for use on the kilojoule-scale, short-pulse OMEGA EP laser.
Document Type
Academic Journal
Author
Bruhaug G; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Rinderknecht HG; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; E Y; The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.; Wei MS; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Brannon RB; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Guy D; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Peck RG; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Landis N; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Brent G; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Fairbanks R; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; McAtee C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Walker T; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Buczek T; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Krieger M; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Romanofsky MH; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Milhem C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Francis KG; The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.; Zhang XC; The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.; Collins GW; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.; Rygg JR; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
Source
Publisher: American Institute Of Physics Country of Publication: United States NLM ID: 0405571 Publication Model: Print Cited Medium: Internet ISSN: 1089-7623 (Electronic) Linking ISSN: 00346748 NLM ISO Abbreviation: Rev Sci Instrum Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
A highly adaptable and robust terahertz (THz) energy meter is designed and implemented to detect energetic THz pulses from high-intensity (>10 18 W/cm 2 ) laser-plasma interactions on the OMEGA EP. THz radiation from the laser driven target is detected by a shielded pyrometer. A second identical pyrometer is used for background subtraction. The detector can be configured to detect THz pulses in the 1 mm to 30 μm (0.3- to 10-THz) range and pulse energies from joules to microjoules via changes in filtration, aperture size, and position. Additional polarization selective filtration can also be used to determine the THz pulse polarization. The design incorporates significant radiation and electromagnetic pulse shielding to survive and operate within the OMEGA EP radiation environment. We describe the design, operational principle, calibration, and testing of the THz energy meter. The pyrometers were calibrated using a benchtop laser and show linear sensitivity to up to 1000 nJ of absorbed energy. The initial results from four OMEGA EP THz experiments detected up to ∼15μJ at the detector, which can correspond to hundreds of mJ depending on THz emission and reflection models.