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VIII Contents<br />
3.3.1 Basics of Particle and Photon-Induced Nuclear<br />
ReactionsandTheirDetection ....................... 31<br />
3.3.2 Photo-Induced Reactions: Fission (γ,f), Emission<br />
of Neutrons (γ,xn), and Emission of Protons (γ,p)...... 33<br />
3.3.3 Reactions Induced by Proton or Ion Impact . . . . . . . . . . . . 36<br />
3.4 FutureApplications ........................................ 39<br />
References ...................................................... 41<br />
4 POLARIS: An All Diode-Pumped Ultrahigh Peak Power<br />
Laser for High Repetition Rates<br />
J. He<strong>in</strong>, M. C. Kaluza, R. Bödefeld, M. Siebold, S. Podleska, and<br />
R. Sauerbrey .................................................... 47<br />
4.1 Introduction............................................... 47<br />
4.2 Ytterbium-Doped Fluoride Phosphate Glass<br />
astheLaserActiveMedium................................. 50<br />
4.3 Diodes for Solid State Laser Pump<strong>in</strong>g . . . . . . . . . . . . . . . . . . . . . . . . 52<br />
4.4 ThePOLARISLaser ....................................... 54<br />
4.5 The Five Amplification Stages of POLARIS . . . . . . . . . . . . . . . . . . . 56<br />
4.5.1 The Two Regenerative Amplifiers A1 and A2 . . . . . . . . . . 56<br />
4.5.2 TheMultipassAmplifiersA3andA4 ................. 57<br />
4.5.3 ADesignfortheAmplifierA5 ....................... 59<br />
4.6 TheTiledGrat<strong>in</strong>gCompressor .............................. 61<br />
4.7 FutureProspects........................................... 64<br />
References ...................................................... 64<br />
5 The Megajoule Laser – A High-Energy-Density<br />
<strong>Physics</strong> Facility<br />
D. Besnard ..................................................... 67<br />
5.1 LMJDescriptionandCharacteristics ......................... 67<br />
5.1.1 LMJPerformances ................................. 67<br />
5.1.2 LIL/LMJ Facility Description . . . . . . . . . . . . . . . . . . . . . . . . 69<br />
5.2 LILPerformances.......................................... 70<br />
5.3 LMJ Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73<br />
5.4 LMJIgnitionandHEDPPrograms........................... 75<br />
5.5 Conclusions ............................................... 76<br />
References ...................................................... 77<br />
Part II Sources<br />
6 Electron and Proton Beams Produced<br />
by Ultrashort Laser Pulses<br />
V. Malka, J. Faure, S. Fritzler, and Y. Gl<strong>in</strong>ec ....................... 81<br />
6.1 Introduction............................................... 81<br />
6.2 TheoreticalBackground..................................... 82<br />
6.2.1 Electron Beam Generation <strong>in</strong> Underdense Plasmas . . . . . . 82