High performance compact magnetic spectrometers for energetic ion and electron measurement in ultraintense short pulse laser solid interactions.

An ultraintense short pulse lasers incident on solid targets can generate relativistic electrons that then accelerate energetic protons and ions. These fast electrons and ions can effectively heat the solid target, beyond the region of direct laser interaction, and are important to realizing the fast ignition concept. To study these energetic ions and electrons produced from the laser-target interactions, we have developed a range of spectrometers that can cover a large energy range (from less than 0.1 MeV to above 100 MeV). They are physically compact, high performance, and low cost. We will present the basic design of these spectrometers and the test results from recent laser experiments.

[1]  Michael D. Perry,et al.  Ignition and high gain with ultrapowerful lasers , 1994 .

[2]  Deanna M. Pennington,et al.  Energetic proton generation in ultra-intense laser–solid interactions , 2000 .

[3]  S. Wilks,et al.  Short pulse laser produced energetic electron and positron measurements , 2006 .

[4]  Miquel,et al.  Experimental Confirmation of Ponderomotive-Force Electrons Produced by an Ultrarelativistic Laser Pulse on a Solid Target. , 1996, Physical review letters.

[5]  Y. Ping,et al.  Absolute calibration of image plates for electrons at energy between 100 keV and 4 MeV. , 2007, The Review of scientific instruments.

[6]  Z. Sheng,et al.  Observation of a fast electron beam emitted along the surface of a target irradiated by intense femtosecond laser pulses. , 2006, Physical review letters.

[7]  R. P. Drake,et al.  High-Energy-Density Physics: Fundamentals, Inertial Fusion, and Experimental Astrophysics , 2006 .

[8]  K. Tanaka,et al.  On the behavior of ultraintense laser produced hot electrons in self-excited fields , 2007 .

[9]  R R Freeman,et al.  A Bremsstrahlung spectrometer using k-edge and differential filters with image plate dosimeters. , 2008, The Review of scientific instruments.

[10]  Zhebin Wang,et al.  Experimental study for angular distribution of the hot electrons generated by femtosecond laser interaction with solid targets , 2003 .

[11]  S. Wilks,et al.  Direct experimental evidence of back-surface ion acceleration from laser-irradiated gold foils. , 2004, Physical review letters.

[12]  Michael D. Perry,et al.  Electron, photon, and ion beams from the relativistic interaction of Petawatt laser pulses with solid targets , 2000 .

[13]  Michael D. Perry,et al.  Experimental Measurements of Hot Electrons Generated by Ultraintense ( > 10 19 W / cm 2 ) Laser-Plasma Interactions on Solid-Density Targets , 1998 .

[14]  B. Young,et al.  A compact electron spectrometer for hot electron measurement in pulsed laser solid interaction , 2003 .