Characterization of Energetic Protons Generated in the ShenGuang-II UP Petawatt Laser Interactions with Foil Targets

<div>(a) The experimental optical density profile in Figure <a href="../fig4/#b">4(b)</a> for <i>X</i> from 11 mm to 14 mm was fitted by an edge spread function (ESF) with the coefficient<span class="nowrap"><svg height="8.55521pt" id="M22" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.34882 52.6033 8.55521" width="52.6033pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,2.179,0)"><path d="M412 140C382 77 369 73 315 73H129L270 222C362 320 402 379 402 466C402 571 322 635 234 635C177 635 130 609 99 576L42 495L64 475C90 514 133 568 201 568C274 568 318 519 318 435C318 349 255 267 193 193C144 135 87 78 32 23V0H405C417 45 427 89 440 131L412 140Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.419,0)"><path d="M548 455L523 469C505 448 490 439 461 439C416 439 374 447 316 447C144 447 23 310 23 161C23 47 89 -12 179 -12C312 -12 429 106 429 244C429 303 419 344 368 386L371 388C404 383 440 378 474 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(b) The MTF for the protons with different energies; the shaded area represents the range of the possible MTF.</div>

Laser and Particle Beams

fig5

Figure 5

Figure 5: Characterization of Energetic Protons Generated in the ShenGuang-II UP Petawatt Laser Interactions with Foil Targets 