A new Schwarzschild optical system for two-dimensional EUV imaging of MRX plasmas

POSTER

Abstract

This poster describes the design and construction of a new Schwarzschild optical system for two-dimensional EUV imaging of plasmas. This optical system consists of two concentric spherical mirrors with radii R$_{1}$ and R$_{2}$, and is designed to operate with certain angles of incidence $\theta_{1}$ and $\theta _{2}$. The special feature of this system resides in the fact that all the rays passing through the system are tangential to a third concentric circle; it assures that the condition for Bragg reflection is simultaneously fulfilled at each point on the two reflecting surfaces if the spherical mirrors are replaced by spherical multi-layer structures. A prototype of this imaging system will be implemented in the Magnetic Reconnection Experiment (MRX) at PPPL to obtain two-dimensional EUV images of the plasma in the energy range from 18 to 62 eV; the relative intensity of the emitted radiation in this energy range was determined from survey measurements with a photodiode. It is thought that the radiation at these energies is due to Bremsstrahlung and line emission caused by suprathermal electrons.

Authors

  • Peter Bolgert

    Princeton Plasma Physics Laboratory, Princeton, NJ 08543, Princeton Plasma Physics Laboratory

  • M. Bitter

    Retired, Princeton Plasma Physics Laboratory, Princeton, NJ 08543

  • P. Efthimion

    Princeton Plasma Physics Laboratory, Princeton, NJ 08543

  • K. Hill

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, PPPL

  • Hantao Ji

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, Princeton Plasma Physics Laboratory, Princeton University, Princeton Plasma Physics Laboratory, Princeton, New Jersey, USA, Princeton Plasma Physics Lab

  • C.E. Myers

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, Princeton Plasma Physics Laboratory, Princeton University, Princeton Plasma Physics Lab

  • M. Yamada

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, Princeton Plasma Physics Laboratory, Princeton University

  • Jongsoo Yoo

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, Princeton, NJ 08543, Princeton Plasma Physics Laboratory, Princeton University

  • S. Zweben

    Princeton Plasma Physics Laboratory, Princeton, NJ 08543, PPPL, Princeton Plasma Physics Laboratory